Error Using Linq Response.BinaryWrite For Images Stored In The Database
Mar 1, 2008
hi i have given you the ado.net code to retrive a image from the database.
I have tried using linq and i am getting a error in
Response.BinaryWrite(rs.image) in LINQ.
so i have used the ado.net which i dont want to use.
can you pls help me how to correct the error.it says cannot convert linq.binary data...
thanks
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim MyReader As SqlDataReaderDim MySqlConnection As SqlConnection
Dim MySqlCommand As SqlCommandMySqlConnection = New SqlConnection("server=(local)SQLExpress;Integrated Security=SSPI;database=customs")MySqlCommand = New SqlCommand("select * from tbl_temp_importer_owner where TIN=555", MySqlConnection)
MySqlConnection.Open()
MyReader = MySqlCommand.ExecuteReader()Do While (MyReader.Read())
Response.ContentType = MyReader.Item("PersonImageType")Response.BinaryWrite(MyReader.Item("PersonImage"))///Error come here in linq
Loop
MySqlConnection.Close()Response.Write("Person info successfully retrieved!")
End Sub
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Nov 26, 2007
OBJECTIVE: I would like to read a text file from SQL Server 2000, read the text file content, and load its conntents in a RichTextBoxTHINGS I'VE DONE AND HAVE WORKING:1) I've successfully load a text file (ex: textFile.txt) in sql server database table column (with datatype Image) 2) I've also able to load the file using a Handler as below: using System;using System.Web;using System.Data.SqlClient;public class HandlerImage : IHttpHandler {string connectionString;public void ProcessRequest (HttpContext context) {connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["NWS_ScheduleSQL2000"].ConnectionString;int ImageID = Convert.ToInt32(context.Request.QueryString["id"]);SqlConnection myConnection = new SqlConnection(connectionString);string Command = "SELECT [Image], Image_Type FROM Images WHERE Image_Id=@Image_Id";SqlCommand cmd = new SqlCommand(Command, myConnection);cmd.Parameters.Add("@Image_Id", System.Data.SqlDbType.Int).Value = ImageID;SqlDataReader dr;myConnection.Open(); cmd.Prepare(); dr = cmd.ExecuteReader();if (dr.Read()){ //WRITE IMAGE TO THE BROWSERcontext.Response.ContentType = dr["Image_Type"].ToString();context.Response.BinaryWrite((byte[])dr["Image"]);}myConnection.Close();}public bool IsReusable {get {return false;}}}'>'>
<a href='<%# "HandlerDocument.ashx?id=" + Eval("Doc_ID") %>'>File
</a>- Click on this link, I'll be able to download or view the file WHAT I WANT TO DO, BUT HAVE PROBLEM:- I would like to be able to read CONTENT of this file and load it in a string as belowStreamReader SR = new StreamReader()SR = File.Open("File.txt");String contentText = SR.Readline();txtBox.text = contentText;BUT THIS ONLY WORK FOR files in the server.I would like to be able to read FILE CONTENTS from SQL Server.PLEASE HELP. I really appreciate it.
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Mar 31, 2008
I have an example : A Simple Database Query using LINQ to SQL
Before creating the project, I using SQLmetal to generate the Nosthwind Entity Classes "Northwind.cs"
c:sqlmetal /namespace:nwind /code:Northwind.cs /pluralize /functions /sprocs /views "C:CongChinhNorthwindNorthwind.mdf"
and then, I add the Northwind.cs in my project.
CODE 1 using System;
2
3 using System.Linq;
4
5 using System.Text;
6
7 using nwind;
8
9
10
11 namespace Ex
12
13 {
14
15 class Program
16
17 {
18
19 static void Main(string[] args)
20
21 {
22
23 Northwind db = new Northwind(@"Data Source=.SQLEXPRESS;Initial Catalog=Northwind");
24
25 var cust =
26
27 from c in db.Customers
28
29 where c.City == "Rio de Janeiro"
30
31 select c;
32
33 foreach (var kh in cust) //---> SQLException was unhandled
34
35 Console.WriteLine("{0}", kh.CompanyName);
36
37 Console.ReadLine();
38
39 }
40
41 }
42
43 }
But when I run the program. It throws a SQLExecption : Login failed for user ''. The user is not associated with a trusted SQL Server connection.I'm using SQLExpress and server name : CONGCHINHSQLEXPRESS and Windows Authentication
I don't know how to solve this problem. Somebody help me,please !
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Jul 10, 2006
Hi,
I want to view the images that are stored in a sql database. I am using VS2005. When I open server explorer and drill down to the dbase tables and the click on the show table data option the table is displayed in a new window.
when I open a table that stores images only a tag saying that the cell contains binary data is displayed. There doesn't seem to be any way to display the actual image and therefore edit the image. I can manipulate textual data directly in the database table...how do I edit graphics?
Thanks!
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Jun 21, 2007
Hi,
I need some tips regarding some performance issues and it would have been great if someone could provide me with the same. I'm into a project where we need to handle a lot of images dynamically. Images are delivered dynamically as per the users query. You can think of it something like an image search. The technologies used for this project are ASP.Net 2.0, C# and SQL Server 2000. I would like to know if the images should be stored in the database or as files itself. I did a couple of R&D on this and 90% of the places I found that it€™s better to store the images as files. As a final answer to this I thought I'll post this query in this forum. Irrespective of whether the images are stored in the database or as files, the following are some of the key features that I'm looking into (priority wise):
1. Performance - I would like to obtain the maximum performance. Images need to be delivered without
much delay.
2. Security of the data and images.
3. Easy backing up and restoration of the data and images.
It would have been great if someone could provide me with the right solution with supportive answers, so that I would be able to design the project accordingly.
Thanks & Regards,
Frens
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Oct 29, 2015
I am trying to backup and restore a 20GB SQL database from a SQL Server 2012 to another SQL Server 2014, but I have come across the following issues:
1) The developers [against best practice] have stored multiple images in fields within the database as binary code.
This therefore exceeds the 65532 character limit in some fields, so even though the images do show [based upon the data saved within this field], I cannot find the data in the field beyond this 65532 limit, within SQL Server.
How can I export / locate this data after the 65532 character limit?
2) When I have attempted to restore the database I am getting this error message:
Restore of database 'zapkam' failed. (Microsoft.SqlServer.Management.RelationalEngineTa sks)
Additional information:
System.Data.SqlClient.SqlError: RESTORE detected an error on page (1:1592996) in database "zapkam" as read from the backup set. (Microsoft.SqlServer.SmoExtended)
I have managed to restore two other smaller databases using the same technique, but am wondering if it's an issue with the database itself.
3) I have uploaded this database to the new server using FileZilla FTP Client, but it has cut out, painfully at 80% + 90% on a couple of occasions.
Is there a better solution for uploading these big files that I could possibly use? For example, uploading table by table or similar...
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May 15, 2008
Hello, I have deployed myWebApp on the IIS. All went well now, but the site does not have any connection with the database. I've already done a search on the error 26, which gave me alot of hints about solving the problem.Still I'm gettting this error. I already enabled the remote connections through the sql surface area configuration.Could it have something to do with the fact that I use LINQ? I can't find any connectionstring to modify anywhere ... Help would be appreciated.
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Jun 2, 2004
I succesfully uploaded various file into my SQL database. My question is, does anyone know how to retrieve or display these files such as jpg, word document.... in VB.net
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Jan 23, 2006
i get this error when i try to connect to sql server 2005 developer edition with the latest JDBC.
sql string =>> jdbc:sqlserver://localhost:1434;databaseName=c1 Elvis elvis
SQL STATE: 08S01
ERROR CODE: 0
MESSAGE: An I/O error occurred while receiving the TDS prelogin response.
And the stacktrace is:
com.microsoft.sqlserver.jdbc.SQLServerException: An I/O error occurred while receiving the TDS prelogin response.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(Unknown Source)
at com.microsoft.sqlserver.jdbc.DBComms.Prelogin(Unknown Source)
at com.microsoft.sqlserver.jdbc.DBComms.<init>(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
and is called :connection=DriverManager.getConnection(con, user, password);
Please tell me what is wrong ? Because in other part of the code it works fine !
What is this "I/O error occurred while receiving the TDS prelogin response" ?
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Sep 20, 2005
Is there a way to execute a stored procedure and have it move on without waiting for a response from the stored procedure. I am trying to create a button on a webpage that will execute a stored procedure but the procedure takes to long to run and my page times out. Instead I would like the button to start the procedure and the webpage look at a table of data. When the table of data is empty then I will know the stored procedure is complete. Is this possible?
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Jan 14, 2007
Hi all,
This is a problem for that I lost a weekend to reach to this conclusions:
Here is the scenario:
I need a file downloaded from a FTP server on my SQL 2005 DB Server to process it in several ways. This file is tens of MBs (let's say 50MB). I set up a CLR stored procedure to bring it locally on the machine.
Inside this procedure, call it getFtpFile, I use the FtpWebRequest to issue the commands I need to the FTP server (get the file size and download the file). For reading and writing I use a StreamReader sr and a StreamWriter. sw
I read the remote file in block with:
sr.ReadBlock(buf, 0, blockSizeBytes);
Everything work file until the last block that, most probably will not be of size blockSizeBytes, but smaller. So, what happens is that when I read this last block there is an exception raised from the call saying:
The underlying connection was closed: An unexpected error occurred on a receive.
This happens only if:
-> the code runs inside SQL (calling the SP) (it runs perfect on normal tet environment where I have another executable and call the getFtpFile method in the CLR dll);
-> 100 seconds (100000 miliseconds) (exactly) have passed (small files do not experiencing this problem)
I thought the reader writer scheme is not perfect and implemented again with a simple FileStream.WriteByte(response.GetResponseStream().Read());
This approach, even if very slow, still has the problem after 100 seconds, in a CLR SQL environment, when it reads the at the last character.
I have used all the combinations of KeepAlive and response.Closose(). Problems still there.
Conclusion: There must be a 100 seconds timeout that immediately after my last byte has been received, closes the connection and the stream of the response crashes during this last call.
Thank you all for the help!
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Jun 6, 2008
All --
Please help.
Linq-To-Sql is not using the database-defined default values.
For example, suppose there exists a column, Table1.Column1, of type nvarchar(32) in the database.
Further suppose that Table1.Column1 has a default set as '', an empty string, set in the database itself.
Now suppose that one has a Linq-To-Sql class mapped to this table.
Note that if one then tries to insert, using the Linq class, and one does not provide a value for Table1.Column1, then it throws a RTE.
Is there a way around this other than writing a partial class and using the Extensibility methods?
Please advise.
Thank you.
-- Mark Kamoski
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Nov 20, 2007
Will like to get some feedback regarding SSRS 2005 with Oracle Database.
Please advice pros and cons..
Thanks in advance and if anyone in such environment is here please respond.
Seems oracle discoverer is useless
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May 31, 2008
I have problem with LINQ. I have created SQL Server 2005 database Database.mdf in App_Data folder with two tables - Pages and PagesGroups. Table Pages consist of fields PageID, AspxForm, DescriptionEN, DescriptionPL, PagesGroupID, NavNameEN, NavNamePL, PageActive, NavToolTipEN, NavToolTipPL and table PagesGroups consist of PagesGroupID, NavGroupNameEN, NavGroupNamePL, NavGroupToolTipEN, NavGroupToolTipPL, GroupDescriptionPL, GroupDescriptionEN, GroupActive. I added example rows. I created DataClasses.dbml, where Pages is child of PagesGroups, and DataClasses.designer.cs, which cause error "No overload for method 'DataContext' takes '0' arguments", in App_Code folder. I started writing LINQ commands in master page (DataClassesDataContext db = new DataClassesDataContext(); var pages = from p in db.Pages select new { Description = p.PagesGroup.GroupDescriptionPL };).
What should I write in DataClasses.designer.cs that errors does not occur? What is wrong in my DataClasses.designer.cs?
I wrote source of DataClasses.designer.cs, MasterPage.master and error message below.
App_Code/DataClasses.designer.cs:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.Linq;
using System.Data.Linq.Mapping;
using System.Linq;
using System.Linq.Expressions;using System.Reflection;
[System.Data.Linq.Mapping.DatabaseAttribute(Name="Database")]
public partial class DataClassesDataContext : System.Data.Linq.DataContext
{
private static System.Data.Linq.Mapping.MappingSource mappingSource = new AttributeMappingSource();
public System.Data.Linq.Table<Page> Pages
{
get
{return this.GetTable<Page>();
}
}
public System.Data.Linq.Table<PagesGroup> PagesGroups
{
get
{return this.GetTable<PagesGroup>();
}
}
}
[Table(Name="dbo.Pages")]
public partial class Page : INotifyPropertyChanging, INotifyPropertyChanged
{
private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
private int _PageID;
private string _AspxForm;
private string _DescriptionEN;
private string _DescriptionPL;
private int _PagesGroupID;
private string _NavNameEN;
private string _NavNamePL;
private bool _PageActive;
private string _NavToolTipEN;
private string _NavToolTipPL;
private EntityRef<PagesGroup> _PagesGroup;
public Page()
{
this._PagesGroup = default(EntityRef<PagesGroup>);
}
[Column(Storage="_PageID", AutoSync=AutoSync.Always, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)]
public int PageID
{
get
{
return this._PageID;
}
set
{
if ((this._PageID != value))
{
this.SendPropertyChanging();
this._PageID = value;
this.SendPropertyChanged("PageID");
}
}
}
[Column(Storage="_AspxForm", DbType="Char(10) NOT NULL", CanBeNull=false)]
public string AspxForm
{
get
{
return this._AspxForm;
}
set
{
if ((this._AspxForm != value))
{
this.SendPropertyChanging();
this._AspxForm = value;
this.SendPropertyChanged("AspxForm");
}
}
}
[Column(Storage="_DescriptionEN", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string DescriptionEN
{
get
{
return this._DescriptionEN;
}
set
{
if ((this._DescriptionEN != value))
{
this.SendPropertyChanging();
this._DescriptionEN = value;
this.SendPropertyChanged("DescriptionEN");
}
}
}
[Column(Storage="_DescriptionPL", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string DescriptionPL
{
get
{
return this._DescriptionPL;
}
set
{
if ((this._DescriptionPL != value))
{
this.SendPropertyChanging();
this._DescriptionPL = value;
this.SendPropertyChanged("DescriptionPL");
}
}
}
[Column(Storage="_PagesGroupID", DbType="Int NOT NULL")]
public int PagesGroupID
{
get
{
return this._PagesGroupID;
}
set
{
if ((this._PagesGroupID != value))
{
if (this._PagesGroup.HasLoadedOrAssignedValue)
{
throw new System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException();
}
this.SendPropertyChanging();
this._PagesGroupID = value;
this.SendPropertyChanged("PagesGroupID");
}
}
}
[Column(Storage="_NavNameEN", DbType="NVarChar(50) NOT NULL", CanBeNull=false)]
public string NavNameEN
{
get
{
return this._NavNameEN;
}
set
{
if ((this._NavNameEN != value))
{
this.SendPropertyChanging();
this._NavNameEN = value;
this.SendPropertyChanged("NavNameEN");
}
}
}
[Column(Storage="_NavNamePL", DbType="NVarChar(50) NOT NULL", CanBeNull=false)]
public string NavNamePL
{
get
{
return this._NavNamePL;
}
set
{
if ((this._NavNamePL != value))
{
this.SendPropertyChanging();
this._NavNamePL = value;
this.SendPropertyChanged("NavNamePL");
}
}
}
[Column(Storage="_PageActive", DbType="Bit NOT NULL")]
public bool PageActive
{
get
{
return this._PageActive;
}
set
{
{
this.OnPageActiveChanging(value);
this.SendPropertyChanging();
this._PageActive = value;
this.SendPropertyChanged("PageActive");
}
}
}
private void OnPageActiveChanging(bool value)
{
throw new NotImplementedException();
}
[Column(Storage="_NavToolTipEN", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string NavToolTipEN
{
get
{
return this._NavToolTipEN;
}
set
{
if ((this._NavToolTipEN != value))
{
this.SendPropertyChanging();
this._NavToolTipEN = value;
this.SendPropertyChanged("NavToolTipEN");
}
}
}
[Column(Storage="_NavToolTipPL", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string NavToolTipPL
{
get
{
return this._NavToolTipPL;
}
set
{
if ((this._NavToolTipPL != value))
{
this.SendPropertyChanging();
this._NavToolTipPL = value;
this.SendPropertyChanged("NavToolTipPL");
}
}
}
[Association(Name="PagesGroup_Page", Storage="_PagesGroup", ThisKey="PagesGroupID", IsForeignKey=true)]
public PagesGroup PagesGroup
{
get
{
return this._PagesGroup.Entity;
}
set
{
PagesGroup previousValue = this._PagesGroup.Entity;
if (((previousValue != value)
|| (this._PagesGroup.HasLoadedOrAssignedValue == false)))
{
this.SendPropertyChanging();
if ((previousValue != null))
{
this._PagesGroup.Entity = null;
previousValue.Pages.Remove(this);
}
this._PagesGroup.Entity = value;
if ((value != null))
{
value.Pages.Add(this);
this._PagesGroupID = value.PagesGroupID;
}
else
{
this._PagesGroupID = default(int);
}
this.SendPropertyChanged("PagesGroup");
}
}
}
public event PropertyChangingEventHandler PropertyChanging;
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void SendPropertyChanging()
{
if ((this.PropertyChanging != null))
{
this.PropertyChanging(this, emptyChangingEventArgs);
}
}
protected virtual void SendPropertyChanged(String propertyName)
{
if ((this.PropertyChanged != null))
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
[Table(Name="dbo.PagesGroups")]
public partial class PagesGroup : INotifyPropertyChanging, INotifyPropertyChanged
{
private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
private int _PagesGroupID;
private string _NavGroupNameEN;
private string _NavGroupNamePL;
private string _NavGroupToolTipEN;
private string _NavGroupToolTipPL;
private string _GroupDescriptionEN;
private string _GroupDescriptionPL;
private bool _GroupActive;
private EntitySet<Page> _Pages;
public PagesGroup()
{
this._Pages = new EntitySet<Page>(new Action<Page>(this.attach_Pages), new Action<Page>(this.detach_Pages));
}
[Column(Storage="_PagesGroupID", AutoSync=AutoSync.Always, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)]
public int PagesGroupID
{
get
{
return this._PagesGroupID;
}
set
{
if ((this._PagesGroupID != value))
{
this.SendPropertyChanging();
this._PagesGroupID = value;
this.SendPropertyChanged("PagesGroupID");
}
}
}
[Column(Storage="_NavGroupNameEN", DbType="NVarChar(50) NOT NULL", CanBeNull=false)]
public string NavGroupNameEN
{
get
{
return this._NavGroupNameEN;
}
set
{
if ((this._NavGroupNameEN != value))
{
this.SendPropertyChanging();
this._NavGroupNameEN = value;
this.SendPropertyChanged("NavGroupNameEN");
}
}
}
[Column(Storage="_NavGroupNamePL", DbType="NVarChar(50) NOT NULL", CanBeNull=false)]
public string NavGroupNamePL
{
get
{
return this._NavGroupNamePL;
}
set
{
if ((this._NavGroupNamePL != value))
{
this.SendPropertyChanging();
this._NavGroupNamePL = value;
this.SendPropertyChanged("NavGroupNamePL");
}
}
}
[Column(Storage="_NavGroupToolTipEN", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string NavGroupToolTipEN
{
get
{
return this._NavGroupToolTipEN;
}
set
{
if ((this._NavGroupToolTipEN != value))
{
this.SendPropertyChanging();
this._NavGroupToolTipEN = value;
this.SendPropertyChanged("NavGroupToolTipEN");
}
}
}
[Column(Storage="_NavGroupToolTipPL", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string NavGroupToolTipPL
{
get
{
return this._NavGroupToolTipPL;
}
set
{
if ((this._NavGroupToolTipPL != value))
{
this.SendPropertyChanging();
this._NavGroupToolTipPL = value;
this.SendPropertyChanged("NavGroupToolTipPL");
}
}
}
[Column(Storage="_GroupDescriptionEN", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string GroupDescriptionEN
{
get
{
return this._GroupDescriptionEN;
}
set
{
if ((this._GroupDescriptionEN != value))
{
this.SendPropertyChanging();
this._GroupDescriptionEN = value;
this.SendPropertyChanged("GroupDescriptionEN");
}
}
}
[Column(Storage="_GroupDescriptionPL", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string GroupDescriptionPL
{
get
{
return this._GroupDescriptionPL;
}
set
{
if ((this._GroupDescriptionPL != value))
{
this.SendPropertyChanging();
this._GroupDescriptionPL = value;
this.SendPropertyChanged("GroupDescriptionPL");
}
}
}
[Column(Storage="_GroupActive", DbType="Bit NOT NULL")]
public bool GroupActive
{
get
{
return this._GroupActive;
}
set
{
if ((this._GroupActive != value))
{
this.SendPropertyChanging();
this._GroupActive = value;
this.SendPropertyChanged("GroupActive");
}
}
}
[Association(Name="PagesGroup_Page", Storage="_Pages", OtherKey="PagesGroupID")]
public EntitySet<Page> Pages
{
get
{
return this._Pages;
}
set
{
this._Pages.Assign(value);
}
}
public event PropertyChangingEventHandler PropertyChanging;
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void SendPropertyChanging()
{
if ((this.PropertyChanging != null))
{
this.PropertyChanging(this, emptyChangingEventArgs);
}
}
protected virtual void SendPropertyChanged(String propertyName)
{
if ((this.PropertyChanged != null))
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
private void attach_Pages(Page entity)
{
this.SendPropertyChanging();
entity.PagesGroup = this;
}
private void detach_Pages(Page entity)
{
this.SendPropertyChanging();
entity.PagesGroup = null;
}
}
MasterPage.master:
...
using System.Data.Linq;
using System.Data.Linq.Mapping;
using System.Globalization;
using System.Linq;
using System.Linq.Expressions;
...
public partial class MasterPage : System.Web.UI.MasterPage
{public void Page_Load(object sender, EventArgs e)
{
...
DataClassesDataContext db = new DataClassesDataContext();
...
if (Page.UICulture == "Polish")
{
...var pages = from p in db.Pages
where p.PagesGroup.GroupActive == true && p.PageActive == trueselect new { PagesGroupDescription = p.PagesGroup.GroupDescriptionPL };
}
else
{var pages = from p in db.Pages
where p.PagesGroup.GroupActive == true && p.PageActive == true
select new { PagesGroupDescription = p.PagesGroup.GroupDescriptionEN };
...
}
...
}
}
Error:
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS1501: No overload for method 'DataContext' takes '0' argumentsc:UsersAdministratorDocumentsMy Web SitesKamil Szmit (szmitek)App_CodeDataClasses.designer.cs(25,22): error CS1501: No overload for method 'DataContext' takes '0' arguments
c:WindowsassemblyGAC_MSILSystem.Data.Linq3.5.0.0__b77a5c561934e089System.Data.Linq.dll: (Location of symbol related to previous error)
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Feb 24, 2008
following is the code which i am trying to use
it throws an error and dosent work.
error details:
Unable to cast object of type 'System.Data.Linq.DataQuery`1[tbl_temp_bank]' to type 'tbl_temp_bank'.
source code(aspx.vb file)
Dim c As New temp_business_bankDataContextDim tag = From t In c.tbl_temp_banks Where t.TIN = Convert.ToInt32(tin.Text) Select t
c.tbl_temp_banks.DeleteOnSubmit(tag)
c.SubmitChanges()
please can some one help me with this.thanks
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Nov 24, 2006
I have just inherited an SQL database where images were stored in a table column using binary data type.I have decided to save the images in a filesystem and then just save the path in a databse column.
The problem is how i can retrieve all the images in the SQL db, export them to a folder in jpeg format.
I dont even know where to start.Can anyone please help?
Regards,
charles
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Sep 26, 2007
I have a Microsoft Cluster running on Server 2003 Entrprise. SQL 2000 8.00.2039 (SP4). 5gb physical memory installed.
With the databases online we run a test failover from the Cluster administrator. It takes about 30-40 seconds and completes without generating any Server Event log errors nor SQL log errors. Everything looks good from an administrative stand point.
However, when we test with running a series of queries to the databases, then failover, we notice that it can take up to 3 or 4 minutes before some of the databases will respond. Connections are not refused, they just sit there.
How can we troubleshoot this or does anyone have a similiar experience with this scenario?
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Jan 17, 2005
What is the best way to store images in sql server and then retrieve them with stored proc's using vb.net/asp.net? There seems to be a lot of different opinions about just saving the img tag, the path, etc.
I only need to store 15 icons....
appreciate any help I can get.
Thanks
soggy coder seattle
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May 23, 2003
I am having a problem with MMSQL BLOB with VB, Sorry to say I am new in Programming using VB 6 and MSSQL and I have never touch BLOB in my live.
I just wish anyone could give me any ideal, like, white pages, or manual on how do I insert BLOB data (Images) to MSSQL 2000 database using VB 6. I need to know exspecially the VB Code and the SQL Portion if you have a store procedure code for that it will be nice.
:confused:
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Feb 9, 2007
The URL address is for example http://backup/pics/19980.jpg
On the report when I right click on an image the URL is http://localhost/reportserver
I do not understand what is going on. Please help.
Many thanks,
Nic
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Jun 10, 2008
Hi.
I've been traling the forum and the internet for a striaghtr forward solution on this.
I'm trying to do what loads of people have already achieved: retrive images from an SQL database.
I have successfully uploaded inages to an "iamges" table, storing the image as SQL type "image", also storing size, type, description, name etc.
I want to be able to read one or more of these images (and other data) back from the table.
I'm using C#, ASP NET 2.0, SQL,
Any examples I've found needed a lot of tweaking, and for some reason or other didn't work!
Please don;t just pose yet another URL to an example - I've probably tried it and failed already.
I don't mind if I display the images in a GridView or just within an aspx page.
Ideally I'd be able to dispaly a few images on a page.
I know how to read and display the rest of the data in the "images" table.
Can anyone help please?
Do you need more info?
Thanks in advance,
Garrett
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Oct 13, 2005
Hi,Recently I was asked to insert images into the database as a part of my module,can someone help me out on this, How can I insert images and retrieve the same from databaseSandhya
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Feb 26, 2006
I want to store IMAGE into Database So can any one tell me what's the command for that ?
like my image name is hello.jsp
command means the query like ( Select * from tableNAme )
Like thins pl help me & tell me What datatype should i use for that ?
Thaks for your help in advance
Have a Good Day
Harsh
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Sep 22, 2004
hello ... i have a project this semester and i had to study is storing images in a database ( using Microsoft Access ) is good or bad ? so any one could tell me the advantages and the disadvantages please ...
thanks
bye
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Oct 6, 2005
An odd question from me, I know, but this time, I assure you a twist.
I have a group that wants to store images in either a database or a file share, in order to make a certain website able to run on a load balanced web farm. These images are around 1KB each in size, and have a lifespan of exactly one use (think of graphs). I went a-googling, and found no shortage of articles that say "don't do it, but here's how you can do it", but I did not find any real hard statements as to why to not do it. Needless to say, this is hurting the case for not putting these images in the database. I have found an article that says images over 8KB will have worse performance, but I can not use that factoid here. For the moment, I have the developers leaning toward the fileshare, because they will be writing transaction logs all day, which will be more work than the fileshare needs to do....I think. The best I can do, is cut the text/image datatype overhead, and have them create the table as varbinary(2000), but even then, I don't like the look of the idea.
Anyone out there have good articles/whitepapers that detail the differences between writing single-use images to a fileshare vs. a SQL database? <baiting=blatant>Failing that, do any of the Microsoft development team have an opinion?</baiting>
Alternatively, what is the general opinion of keeping session state information in a database (because I bet that will be my next battle). I see .NET includes a session state server, but not being a programmer, I can not create an opbjective test.
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May 30, 2008
Hia,
We have a simple table which we need to store logo's for a website. The table looks like this:
CLIENTLOGO (Tablename)
id (Bigint) (PK) - NOT NULL
StoredImage (Image) - NOT NULL
ImageSize (Integer) - NULL
Im not an expert on sql sorry!
I have two problems,
1. I need to upload some logo's (they are gif's if thats important)
2. I need to store the image size
I don't have a clue how to do 2 but ive tried the following for 1 but it doesnt seem to work
Insert into CLIENTLOGO (id, storedImageTablename)
Values (1, 'c:ClientLogo1.gif')
Can somebody help, im really confused about this one
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Dec 31, 2007
Hello folks,
I am going to try to explain this as best I can. First off I have a single database within SQL 2005 and the table within the database has a field for binary image data. Currently this database has about 4,000 image records.
What I would like to do is recompress each of the images with new compression software called Déjà vu. What needs to happen in my mind is, pull the current binary data into the compression software, compress the image, then upload the binary data back into the same record as a batch command.
My question is can I do something like that via command line? Or is this something that will require rebuilding the entire database from the ground up? I like having the data all in one database for ease of
maintenance and intergration with other databases I am working with, so I dont want to just link the images.
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May 8, 2006
hi everybody,can anybody help me out by telling me how could I store images in a database, and how to insert new images at run time to a database and thanks
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Jan 14, 2007
Hello All,
My question is how to store images in a database table (in SQL Server), and how to retrieve them?...
Thanks,
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May 9, 2007
hi everyone,I'm currently developing a website and have a lot of images to use there(obviously :P), until now I have in some tables in my sql server db where exists a column which stores the path to: 'image folder + filename'And my question is: what are the advantages of using binary images in database instead of this approach to the problem, i.e., having images stored in a server folder.Thanks in advance.
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Mar 22, 2008
I have a form that inserts text and also allows the user to upload 3 images. I have the text part working, but can't figure out how to get the images uploaded. Here is the form. I just inserted the 3 upload controls in the form and in the datasource to show what I am trying to do. If anybody can help me I appreciate it. 1 <h3><br />Add Listing</h3><hr />
2 <div style="margin:auto;">
3 <table align="center" >
4 <tr>
5 <td align="right">
6 Address:</td>
7 <td>
8 <asp:TextBox ID="TbAddress" runat="server" MaxLength="62" Width="250px"></asp:TextBox> </td>
9 </tr>
10 <tr>
11 <td align="right">
12 City:</td>
13 <td align="left">
14 <asp:TextBox ID="TbCity" runat="server" MaxLength="62" Width="250px"></asp:TextBox></td>
15 </tr>
16 <tr>
17 <td align="right">
18 State:</td>
19 <td align="left">
20 <asp:DropDownList ID="DdState" runat="server">
21 </asp:DropDownList>
22 </td>
23 </tr>
24 <tr>
25 <td align="right">
26 Zip Code:</td>
27 <td align="left">
28 <asp:TextBox ID="TbZipCode" MaxLength="15" Width="75px" runat="server"></asp:TextBox>
29 </td>
30 </tr>
31
32 <tr>
33 <td align="right">
34 Listing Price:</td>
35 <td align="left">
36 <asp:TextBox ID="TbListingPrice" runat="server" MaxLength="30" Width="125px"></asp:TextBox></td>
37 </tr>
38 <tr>
39 <td align="right">
40 Taxes/Half:</td>
41 <td align="left">
42 <asp:TextBox ID="TbTaxes" runat="server" MaxLength="30" Width="125px"></asp:TextBox></td>
43 </tr>
44 <tr>
45 <td align="right">
46 Subdivision:</td>
47 <td align="left">
48 <asp:TextBox ID="TbSubdivision" runat="server" MaxLength="60" Width="225px"></asp:TextBox></td>
49 </tr>
50 <tr>
51 <td align="right">
52 County:</td>
53 <td align="left">
54 <asp:TextBox ID="TbCounty" runat="server" MaxLength="60" Width="225px"></asp:TextBox></td>
55 </tr>
56 <tr>
57 <td align="right">
58 School District:</td>
59 <td align="left">
60 <asp:TextBox ID="TbSchoolDistrict" runat="server" MaxLength="60" Width="225px"></asp:TextBox></td>
61 </tr>
62 <tr>
63 <td align="right">
64 Bedrooms:</td>
65 <td align="left">
66 <asp:DropDownList ID="DdBedrooms" runat="server">
67 </asp:DropDownList>
68 </td>
69 </tr>
70 <tr>
71 <td align="right">
72 Bathrooms:</td>
73 <td align="left">
74 <asp:DropDownList ID="DdBathrooms" runat="server">
75 </asp:DropDownList>
76 </td>
77 </tr>
78 <tr>
79 <td align="right">
80 Living Space:</td>
81 <td align="left">
82 <asp:TextBox ID="TbLivingSpace" runat="server" MaxLength="30" Width="125px"></asp:TextBox></td>
83 </tr>
84 <tr>
85 <td align="right">
86 Stories:</td>
87 <td align="left">
88 <asp:DropDownList ID="DdStories" runat="server">
89 </asp:DropDownList>
90 </td>
91 </tr>
92 <tr>
93 <td align="right">
94 Building Style:</td>
95 <td align="left">
96 <asp:TextBox ID="TbBuildingStyle" runat="server" MaxLength="60" Width="225px"></asp:TextBox></td>
97 </tr>
98 <tr>
99 <td align="right">
100 Year Built:</td>
101 <td align="left">
102 <asp:TextBox ID="TbYearBuilt" runat="server" MaxLength="30" Width="125px"></asp:TextBox></td>
103 </tr>
104 <tr>
105 <td align="right">
106 Bastment:</td>
107 <td align="left">
108 <asp:DropDownList ID="DdBasement" runat="server">
109 </asp:DropDownList>
110 </td>
111 </tr>
112 <tr>
113 <td align="right">
114 Heating:</td>
115 <td align="left">
116 <asp:DropDownList ID="DdHeating" runat="server">
117 </asp:DropDownList>
118 </td>
119 </tr>
120 <tr>
121 <td align="right">
122 Cooling:</td>
123 <td align="left">
124 <asp:DropDownList ID="DdCooling" runat="server">
125 </asp:DropDownList>
126 </td>
127 </tr>
128 <tr>
129 <td align="right">
130 Image 1:</td>
131 <td align="left">
132
133 <asp:FileUpload ID="FileUpload1" runat="server" />
134 </td>
135 </tr>
136 <tr>
137 <td align="right">
138 Image 2:</td>
139 <td align="left">
140 <asp:FileUpload ID="FileUpload2" runat="server" />
141 </td>
142 </tr>
143 <tr>
144 <td align="right">
145 Image 3:</td>
146 <td align="left">
147 <asp:FileUpload ID="FileUpload3" runat="server" />
148 </td>
149 </tr>
150 <tr>
151 <td>
152 </td>
153 <td>
154 </td>
155 </tr>
156 <tr>
157 <td align="right">
158 <asp:Button ID="Button1" runat="server" Text="Save" />
159 </td>
160 <td>
161 </td>
162 </tr>
163
164
165 </table>
166
167 </div>
168
169
170 <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:treesConnectionString %>"
171 InsertCommand="INSERT INTO SueHorvath(Address, City, State, ZipCode, ListPrice, Taxes, Subdivision, County, SchoolDistrict, Bedrooms, Bathrooms, LivingSpace, Stories, BuildingStyle, YearBuilt, Basement, Heating, Cooling, Image1, Image2, Image3) VALUES (@Address, @City, @State, @ZipCode, @ListPrice, @Taxes, @Subdivision, @County, @SchoolDistrict, @Bedrooms, @Bathrooms, @LivingSpace, @Stories, @BuildingStyle, @YearBuilt, @Basement, @Heating, @Cooling, @Image1, @Image2, @Image3)" >
172 <InsertParameters>
173 <asp:ControlParameter Name="Address" Type="String"
174 ControlID="TbAddress" />
175 <asp:ControlParameter Name="City" Type="String"
176 ControlID="TbCity" />
177 <asp:ControlParameter Name="State" Type="String"
178 ControlID="DdState" />
179 <asp:ControlParameter Name="ZipCode" Type="String"
180 ControlID="TbZipCode" />
181 <asp:ControlParameter Name="ListPrice" Type="String"
182 ControlID="TbListingPrice" />
183 <asp:ControlParameter Name="Taxes" Type="String"
184 ControlID="TbTaxes" />
185 <asp:ControlParameter Name="Subdivision" Type="String"
186 ControlID="TbSubdivision" />
187 <asp:ControlParameter Name="County" Type="String"
188 ControlID="TbCounty" />
189 <asp:ControlParameter Name="SchoolDistrict" Type="String"
190 ControlID="TbSchoolDistrict" />
191 <asp:ControlParameter Name="Bedrooms" Type="String"
192 ControlID="DdBedrooms" />
193 <asp:ControlParameter Name="Bathrooms" Type="String"
194 ControlID="DdBedrooms" />
195 <asp:ControlParameter Name="LivingSpace" Type="String"
196 ControlID="TbLivingSpace" />
197 <asp:ControlParameter Name="Stories" Type="String"
198 ControlID="DdStories" />
199 <asp:ControlParameter Name="BuildingStyle" Type="String"
200 ControlID="TbBuildingStyle" />
201 <asp:ControlParameter Name="YearBuilt" Type="String"
202 ControlID="TbYearBuilt" />
203 <asp:ControlParameter Name="Basement" Type="String"
204 ControlID="DdBasement" />
205 <asp:ControlParameter Name="Heating" Type="String"
206 ControlID="DdHeating" />
207 <asp:ControlParameter Name="Cooling" Type="String"
208 ControlID="DdCooling" />
209
210 <asp:ControlParameter Name="FileUpload1" Type="String"
211 ControlID="FileUpload1" />
212 <asp:ControlParameter Name="FileUpload2" Type="String"
213 ControlID="FileUpload2" />
214 <asp:ControlParameter Name="FileUpload3" Type="String"
215 ControlID="FileUpload3" />
216
217
218 </InsertParameters>
219
220 </asp:SqlDataSource>
And here is the code behind 1
2 Partial Class mylistings
3 Inherits System.Web.UI.Page
4 Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
5
6 SqlDataSource1.Insert()
7 TbAddress.Text = ""
8 TbCity.Text = ""
9 DdState.Text = ""
10 TbZipCode.Text = ""
11 TbListingPrice.Text = ""
12 TbTaxes.Text = ""
13 TbSubdivision.Text = ""
14 TbCounty.Text = ""
15 TbSchoolDistrict.Text = ""
16 DdBedrooms.Text = ""
17 DdBathrooms.Text = ""
18 TbLivingSpace.Text = ""
19 DdStories.Text = ""
20 TbBuildingStyle.Text = ""
21 TbYearBuilt.Text = ""
22 DdBasement.Text = ""
23 DdHeating.Text = ""
24 DdCooling.Text = ""
25
26
27
28
29 Response.Redirect(Request.Url.ToString(), False) ' will include the querystring
30 End Sub
31 End Class
32
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Mar 23, 2008
hi,
i would like to store images in my database and retirve them aswell. i have looked at examples on the net but i am finding it hard to follow and undertsand them, can anyone please give me adivse on how i can do this. i have alrady created my table in my database which has 4 fields pictureID, pictureContent, pictureType and pictureSize but i dont know where to go on from here. i want to do it in vb aswell.
please any help and advise would be much appreciated as i am stuck,
thank you
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Mar 26, 2008
i am using sql server,asp.net and C# language.I am able to upload data into the database but couldnt retrieve it from the database.i am using the following code to upload image into the database.kindly help.
SqlConnection connection = null; try { FileUpload img = (FileUpload)imgUpload; Byte[] imgByte = null; if (img.HasFile && img.PostedFile != null) { HttpPostedFile File = imgUpload.PostedFile; imgByte = new Byte[File.ContentLength]; File.InputStream.Read(imgByte, 0, File.ContentLength); } string conn = connection establishing string; connection = new SqlConnection(conn); connection.Open(); string sql = "insert into imagetable values(@enm, @eimg) SELECT @@IDENTITY"; SqlCommand cmd = new SqlCommand(sql, connection); cmd.Parameters.AddWithValue("@enm", txtEName.Text.Trim()); cmd.Parameters.AddWithValue("@eimg", imgByte); int id = Convert.ToInt32(cmd.ExecuteScalar()); lblResult.Text = String.Format("Employee ID is {0}", id); } catch { lblResult.Text = "There was an error"; } finally { connection.Close(); }
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