Profile Image Binary Blob Retrieval
Jan 13, 2008
Hi, All
Can you add a group of images into the aspnet_profile table as a serialized binary blob?
If so how do you retrieve the image from the blob?
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Problem In Converting MS Access OLE Object[Image] Column To BLOB (binary Large Object Bitmap)
May 27, 2008Hi All,
i have a table in MS Access with CandidateId and Image column. Image column is in OLE object format. i need to move this to SQL server 2005 with CandidateId column with integer and candidate Image column to Image datatype.
its very udgent, i need any tool to move this to SQL server 2005 or i need a code to move this table from MS Access to SQL server 2005 in C#.
please do the needfull ASAP. waiting for your reply
with regards
Sql Image Upload And Retrieval?
Apr 9, 2006Hi all, I dont know if anyone here can help me...I am using ASP.NEt with VB.Net and SQL Sever...What I am trying to do is create a system whereby it allows users to upload images into sql server, and thereon later retireve this image.I used a book called The Ultimate VB.Net and ASP.Net Code Book, and it basically gave me the code below to upload and retrieve images. I seem to have managed to allow the uploading of images, with them being stored as <byte> in my database, thought I have no idea how to retrieve them...Does anyone have any ideas???Here is the code I followed.. :"Storing Uploaded Files in Your Database First, a few tips on storing files inside your SQL Server database.For convenience, you’ll really need to store at least three bits of information about your file to get it out in the same shape as you put it in. I’d suggest “data� (a field that will hold your actual file as a byte array, data type “image�), “type� (a field to hold details of the type of file it is, data type “varchar�), and “length� (a field to hold the length in bytes of your file, data type “int�). I’d also recommend “downloadName�, a field to hold the name that the file had when it was uploaded, data type “varchar�. This helps suggest a name should the file be downloaded again via the Web.The problem you have is translating the information from the File Field control into an acceptable format for your database. For a start, you need to get your file into a byte array to store it in an image field. You also need to extract the file type, length, and the download name. Once you have this, set your fields to these values using regular ADO.NET code.So, how do you get this information? It’s simple: just use the following ready-to-run code snippets, passing in your File Field control as an argument. Each function will return just the information you want to feed straight into your database, from a byte array for the image field to a string for the file type.Public Function GetByteArrayFromFileField( _ ByVal FileField As System.Web.UI.HtmlControls.HtmlInputFile) _ As Byte() ' Returns a byte array from the passed ' file field controls file Dim intFileLength As Integer, bytData() As Byte Dim objStream As System.IO.Stream If FileFieldSelected(FileField) Then intFileLength = FileField.PostedFile.ContentLength ReDim bytData(intFileLength) objStream = FileField.PostedFile.InputStream objStream.Read(bytData, 0, intFileLength) Return bytData End If End Function Public Function FileFieldType(ByVal FileField As _ System.Web.UI.HtmlControls.HtmlInputFile) As String ' Returns the type of the posted file If Not FileField.PostedFile Is Nothing Then _ Return FileField.PostedFile.ContentType End Function Public Function FileFieldLength(ByVal FileField As _ System.Web.UI.HtmlControls.HtmlInputFile) As Integer ' Returns the length of the posted file If Not FileField.PostedFile Is Nothing Then _ Return FileField.PostedFile.ContentLength End Function Public Function FileFieldFilename(ByVal FileField As _ System.Web.UI.HtmlControls.HtmlInputFile) As String ' Returns the core filename of the posted file If Not FileField.PostedFile Is Nothing Then _ Return Replace(FileField.PostedFile.FileName, _ StrReverse(Mid(StrReverse(FileField.PostedFile.FileName), _ InStr(1, StrReverse(FileField.PostedFile.FileName), ""))), "") End Function Sorted! One question remains, however. Once you’ve got a file inside a database, how do you serve it back up to a user? First, get the data back out of SQL Server using regular ADO.NET code. After that? Well, here’s a handy function that’ll do all the hard work for you. Simply pass the data from your table fields and hey presto:Public Sub DeliverFile(ByVal Page As System.Web.UI.Page, _ ByVal Data() As Byte, ByVal Type As String, _ ByVal Length As Integer, _ Optional ByVal DownloadFileName As String = "") ' Delivers a file, such as an image or PDF file, ' back through the Response object ' Sample usage from within an ASP.NET page: ' - DeliverFile(Me, bytFile(), strType, intLength, "MyImage.bmp") With Page.Response .Clear() .ContentType = Type If DownloadFileName <> "" Then Page.Response.AddHeader("content-disposition", _ "filename=" & DownloadFileName) End If .OutputStream.Write(Data, 0, Length) .End() End With End Sub Simply pass your byte array, file type, and length, and it’ll send it straight down to your surfer. If it’s an image, it’ll be displayed in the browser window. If it’s a regular file, you’ll be prompted for download.If it’s made available for download, this function also allows you to specify a suggested download file name, a technique that many ASP.NET developers spend weeks trying to figure out. Easy! Working with Uploaded Images Whether you’re building the simplest of photo album Web sites or a fully fledged content management system, the ability to work with uploaded images is a vital one, and with ASP.NET, it’s a real doddle.The following code snippet shows you how, by example. It takes a data stream from the File Field control and converts it into an image object, adding simple error handling should the uploaded file not actually be an image. The code then uses this image object to extract a few core details about the file, from its dimensions to file type:' Get data into image format Dim objStream As System.IO.Stream = _ MyFileField.PostedFile.InputStream Dim objImage As System.Drawing.Image Try ' Get the image stream objImage = System.Drawing.Image.FromStream(objStream) Catch ' This is not an image, exit the method (presuming code is in one!) Exit Sub End Try ' Filename Dim strOriginalFilename As String = MyFileField.PostedFile.FileName ' Type of image Dim strImageType If objImage.RawFormat.Equals(objImage.RawFormat.Gif) Then strImageType = "This is a GIF image" ElseIf objImage.RawFormat.Equals(objImage.RawFormat.Bmp) Then strImageType = "This is a Bitmap image" ElseIf objImage.RawFormat.Equals(objImage.RawFormat.Jpeg) Then strImageType = "This is a JPEG image" ElseIf objImage.RawFormat.Equals(objImage.RawFormat.Icon) Then strImageType = "This is an icon file" ElseIf objImage.RawFormat.Equals(objImage.RawFormat.Tiff) Then strImageType = "This is a TIFF file" Else strImageType = "Other" End If ' Dimensions Dim strDimensions As String strDimensions = "Width in pixels: " & objImage.Width & _ ", Height in pixels: " & objImage.Height ' Send raw output to browser Response.Clear() Response.Write(strOriginalFilename & "<p>" & strImageType & _ "<p>" & strDimensions) Response.End() "For some reason the retrieval code isnt working for me..Can anyone provide any help? even if it means using another method?
View 1 Replies View RelatedDisplaying Blob Image From Db
Jun 10, 2004I'm trying to retrieve an image that I have stored in a SQL Server db, and display it in an .aspx page. It's supposed to retrieve just one image, according to a unique key that's passed. However, when I view the page, nothing appears... just the Internet Explorer missing image placeholder.
I've tried code from several diff tutorials, and can't seem to get it to work.
I'm aware that some people think it's not a good idea to store images in a db, but I have to in this case, since the requirements for this project are that the images are stored in the database. I already know how to store references to file paths of images located in a server folder. I've just never done it this way... storing the whole images in the database. The table has 3 columns, one for the id, "FileType" stores the image type, and the "ImageBinary" is the image itself.
If anyone can shine some light on why my code doesn't display anything, I'd greatly appreciated your help.
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim myConnection As New SqlConnection(ConfigurationSettings.AppSettings("strConn"))
Response.Write("Page Loaded") 'This is just for testing to see if the page loads at all
Dim myCommand As New SqlCommand("Select * from UserImages WHERE id=1234", myConnection)
Try
myConnection.Open()
Dim DR As SqlDataReader
DR = myCommand.ExecuteReader(CommandBehavior.CloseConnection)
If DR.Read() Then
Response.ContentType = DR.Item("FileType")
Response.BinaryWrite(DR("ImageBinary"))
Else
Response.Write("no image found")
End If
myConnection.Close()
Response.Write("<br>Image successfully retrieved!")
Catch SQLexc As SqlException
Response.Write("Read Failed : " & SQLexc.ToString())
End Try
End Sub
DB2 Write Image To Blob Field
Dec 29, 2006I need some help in SSIS Package I am trying to write a byte array to an image (blob) in DB2 destination. I am getting SQL code -290 Invalid Description, if i set the output column to a byte stream. If I set the output column to an Image data type then I get a different error the package will not at that time even process it errors out right away. At least using a byte stream datatype it errors out when it is about to write to the olebd destination. Anybody have success using BLOB fields in SSIS package data flow? Thanks for any help.
View 5 Replies View RelatedMSsQL2005; OPENROWSET, BLOB/IMAGE And STORED PROCEDURE Problems
Oct 7, 2006All,
I work with Microsoft SQL Server 2005 on windows XP professional.
I'd like to create stored procdure to add image to my database (jpg file).
I managed to do it using VARCHAR variable in stored procedure
and then using EXEC, but it don't work directly.
My Table definiton:
CREATE TABLE [dbo].[Users](
[UserID] [int] IDENTITY(1,1) NOT NULL,
[Login] [char](10),
[Password] [char](20),
[Avatar] [image] NULL,
CONSTRAINT [PK_Users] PRIMARY KEY CLUSTERED
(
[UserID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
My working solution using stored procedure:
ALTER PROCEDURE [dbo].[AddUser]
@Login AS VARCHAR(255),
@Password AS VARCHAR(255),
@AvatarFileLocation AS VARCHAR(255),
@UserId AS INT OUTPUT
AS
BEGIN
SET @Query = 'INSERT INTO USERS ' + CHAR(13)
+ 'SELECT '''+ @Login + ''' AS Login, ' + CHAR(13)
+ '''' + @Password + ''' AS Password,' + CHAR(13)
+ '(SELECT * FROM OPENROWSET(BULK ''' + @AvatarFileLocation + ''', SINGLE_BLOB) AS OBRAZEK)'
EXECUTE (@Query)
SET @UserID = @@IDENTITY
END
I'd like to use statement in the stored procdure:
ALTER PROCEDURE [dbo].[AddUser]
@Login AS VARCHAR(255),
@Password AS VARCHAR(255),
@AvatarFileLocation AS VARCHAR(255),
@UserId AS INT OUTPUT
AS
BEGIN
DECLARE
@Query AS VARCHAR(MAX)
SET @AvatarFileLocation = 'C:hitman1.jpg'
INSERT INTO USERS
SELECT @Login AS Login,
@Password AS Password,
(SELECT * FROM OPENROWSET(BULK @AvatarFileLocation, SINGLE_BLOB) AS OBRAZEK)
SET @UserID = @@IDENTITY
END
It generates error:
Incorrect syntax near '@AvatarFileLocation'.
My question is:
Why it does not work and how to write the stored procedure code to run this code without errors.
Thanks for any reply
Limit On Blob/image Data Type In SQL Compact 3.5 SP 1 BETA For ADO Entity Framework?
Apr 5, 2008Hi! I tried to save some image data, but it get truncated at 8000 (the table column is defined as Image). I then wrote a converter to try ntext-datatype instead, but it gets truncated at 4000.
Error message:
System.Data.SqlServerCe: @3 : String truncation: max=4000, len=4168
The code uses only ADO entity framework for database access. Is there a way to store binary data larger than 8000 bytes? I am running SQL Compact 3.5 sp 1 BETA.
Henning
Retrieving Binary Image From SQL
Jul 21, 2005i am trying to retrieve an image blob stored in SQL to a web matrix form (using VB.NET). I am totaly new to this and i got the code below from a site but it doesn't see to work.....
<%@ Page Language="VB" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.IO" %>
<%@ import Namespace="System.Drawing.Image" %>
<%@ import Namespace="System.Drawing.Bitmap" %>
<%@ import Namespace="System.Drawing.Graphics" %>
<%@ import Namespace="System.Web.UI.WebControls" %>
<%@ import Namespace="System.Data.Odbc" %>
<%@ import Namespace="System.Data.SqlClient" %>
<script runat="server">
Private Function GetImageFromDB(ByVal ImageID As Integer) As System.Drawing.Image
' Get the Connection string
Dim strConnection As String
strConnection = "server='(local)'; trusted_connection=true; database='mydatabasename'"
Dim conn As New SqlConnection(strConnection)
Dim sqlCommand As String
Dim strImage As String
Dim image As System.Drawing.Image
Try
sqlCommand = "SELECT ImageField FROM ImageTable WHERE MyImageId = " + ImageID.ToString
Dim cmd As New SqlCommand(sqlCommand)
cmd.Connection = conn
conn.Open()
Dim dr As SqlDataReader
dr = cmd.ExecuteReader()
While (dr.Read())
Dim byt As Byte()
byt = dr.Item(strImage)
Dim bmp As New System.Drawing.Bitmap(New System.IO.MemoryStream(byt))
image = bmp
End While
Catch ex As Exception
' Log Error
Response.Write(ex.Message)
Finally
If conn.State = ConnectionState.Open Then
conn.Close()
End If
End Try
Return image
End Function
Private Sub Page_Load (ByVal sender As System.Object, ByVal e As System.EventArgs)
If Not IsPostBack Then
GetImageFromDB(2111)
End If
End Sub
</script>
<html>
<head>
</head>
<body>
<form enctype="multipart/form-data" runat="server">
<asp:Image id="BrandSignImg" runat="server"></asp:Image>
</form></body></html>
OPENXML And Binary/Image Data
Aug 17, 2005I seem to be getting very annoying behaviour from SQL Server and was wondering what the correct method should be...I want to store some binary data in the database and I want to use a stored procedure. I also want to pass some XML to the stored procedure where this XML contains the binary data. I will then use OPENXML to grab the binary data and stick in the table. In order to ensure the safe transmission of the binary through XML I Base64 encode it. Ok so far. The problem is that although OPENXML is supposed to assume that anything marked as Image/Binary will be Base64 encoded it then proceeds to Base64 encode it again and put that result into the database! So what am I missing, am I supposed use a CDATA section or something rather than Base64 encode my XML?
View 2 Replies View RelatedGet Binary Data From Image Column
May 13, 2008
Hi I have an image column (Spectrum) in a Table (ParticleEDS) which is populated with an array of a bunch of INT32's (4 bytes each)
Using TSQL is there any way that I can read each 4 bytes (convert this to an INT) and return this data for a given record (based on ParticleEDSID).
I know that there are 2048 x 4 bytes that make up the image column.
I would like the output of the query/stored procedure to be:
Value
------------
1 2342
2 2334
3 3343
.....
2048 1001
thanks!
Storing File As Binary Image Into SQL Server
Dec 21, 2005I am using FileUpload control in ASP.net 2.0 to upload files and store them into SQL server database as an image. I am fine with MS office files, image files and etc. We have Product Center (Proe) engineering software to configure parts and the files generated through this software have PLT extension when I store these files, the file type is Plian/text. I am using Fileupload.PostedFile.Content to get the file type. How can I store PLT, TIF files in SQL server? Please help.
View 12 Replies View RelatedHelp In Storing Binary To Image Data Type
Aug 23, 2007Hi. how can i store binary data to another field with image data types.
here is my sample code
--note: [CUD_DOCUMENT] and [RES_DOCUMENT] are image data type
DECLARE @CUD_DOCUMENT binary
SELECT @CUD_DOCUMENT = CUD_DOCUMENT FROM CUD_CONTINUOUS_UPLOAD_DOCUMENTS
INSERT INTO [RES_RESUMES](
[RES_DOCUMENT] -- image data type
) VALUES (
@CUD_DOCUMENT)
thnx for the help.
Converting Binary Image To Readable Text
Sep 18, 2005I have a table that contains the following two columns:BITS (image(16))BIT_LENGTH (int(4))When I look at the table, I see "OLE Object" in the BITS column. Whatsyntax should I use in a SELECT statement to convert the binary imageinfo contained in "BITS" into simple text that I can read? What roledoes the BIT_LENGTH field play?
View 1 Replies View RelatedAccessing Image Files Stored As Binary Data
Jul 11, 2006Hi
When images are uploaded and stored directly into a sql database as binary data (eg in the club starter kit) how can those images be accessed and displayed.
When I open the images table in VWD and select display data, the cells holding the image data hold a <binary data> tag. What I want to be able to do is get at that data, or actually get at the image so that it is displayed. My reason is this, at the moment the only way to access the images in the sql database after they have been uploaded is to log into the website and view them as an administrator of the site. It would be much simpler if I could access the database directly and view the contents of the images table.
Any ideas?
Thanks
Storing Image In Sql Server 2005 In Binary Format?
Nov 1, 2006please mail me at lavkesh_kumar@yaho.com
View 2 Replies View RelatedSQL 2012 :: Find Profile Name In Stored Mail Profile That Already Exists
Jan 22, 2015We have a previous SQL 2012 cluster that emails us when a new database is added. I am unable to figure out why we get this error any time we add a new database to it, and also it prevents us from adding a new availability group to this cluster because of this error.
I also am unable to figure out what profile it is talking about as this was setup before me and I am not a DBA.
Retrieve And Display Image Inside An Html File (stored In Database) In Binary Format
May 15, 2007Hi All,
I am not sure whether this is the right place to post this question. But I am unable to figure out what is the best solution to retrieve and display an image in a html file(stored in varbinary(max) column). I have a list of images in the file and I am supposed to display them. Can anybody please let me know what is the best way to do this?
Thanks a lot!!
Concatenate All Binary Columns Into Single Binary Column?
May 22, 2014Server is SQL 2000
I have a table with 10 rows with a varbinary column
I wish to concatenate all the binary column into a single binary column and then write that to another table within the database. This application splits a binary file (Word or PDF document) into multiple segments (this is Column2 as below)
example as follows
TableA
Column1 Column2 Column3
aaa 001 <some binary value>
aaa 002 <some binary value>
aaa 003 <some binary value>
aaa 004 <some binary value>
aaa 005 <some binary value>
desired results in TableB
Column1 Column2
aaa <concatenated value of above binary columns>
To BLOB Or Not To BLOB, That Is The Question.
Aug 1, 2006We are debating what is industry “best practice� for serving huge numbers of images in an industrial scale website. More directly, which approach produces the best performance and the best scalability? For example, how do sites like ebay, Amazon, and other large sites handle the millions or billions of images they must deal with?
Store as BLOB in sql server?
Store in /images folder and store url text into sql server?
We always assumed that the second approach is what most sites must do. But do they?
One developer on our team maintains that storing one million or more image files in a directory will most certainly result in poor performance, because the server must scan the directory, searching for the correct file, each time a web request is made. The directory is not indexed (?) so performance must eventually suffer.
Other developer counters that storing millions of images as BLOBs into sql server will result in poor performance and HUGE database. An additional layer of access (webserver to sql server, back to webserver, then to client) causes a delay and performance hit.
Who is right? What do the gurus as the world class sites do?
T-SQL (SS2K8) :: Store Binary Data Rather Than Int Or Binary?
May 7, 2015I'm using a bit-wise comparison to effectively store multiple values in one column. However once the number of values increases it starts to become too big for a int data type.you also cannot perform a bitwise & on two binary datatypes. Is there a better way to store the binary data rather than int or binary?
View 9 Replies View RelatedData Retrieval
Jan 7, 2008i m having a huge problem! how to retrieve data from notepad files using asp.net and store the info in fields in MS-Access/Sql db? Plz help !!
View 1 Replies View RelatedPrevious Value Retrieval
Jul 10, 2006I have a table of vehicle usage records with fields including vehicle number, driver, date/time, starting odo, ending odo. I'm looking to compare the starting odo of a given record to the ending odo of the last time that vehicle was used. I also need to return other fields from that previous record, like the date/time and driver.My users basically run a report for any given day, and the vehicles used on that day need to be compared to their most recent usage (most recent relative to the record at hand). This is to ensure that the vehicle hasn't been used in the interim and not recorded (which may indicate theft).I've got a very convoluted process in place, but I'd like to see if it can be streamlined. The current process is done in Access and has a number of queries built on other queries. It is very slow. The data is in SQL Server. Any thoughts on the best ways to accomplish this?TIA
View 4 Replies View RelatedSending Uploaded Image To Data Access Class When Storing Image In SQL Server 2005
Apr 20, 2007I am using the 3-tiered architecture design (presentation, business laws, and data acess layers). I am stuck on how to send the image the user selects in the upload file control to the BLL and then to the DAL because the DAL does all the inserts into the database. I would like to be able to check the file type in the BLL to make sure the file being uploaded is indeed a picture. Is there a way I can send the location of the file to the BLL, check the filetype, then upload the file and have the DAL insert the image into the database? I have seen examples where people use streams to upload the file directly from their presentation layer, but I would like to keep everything seperated in the three classes if possible. I also wasn't sure what variable type the image would be in the function in the BLL that receive the image from the PL. If there are any examples or tips anyone can give me that would be appreciated.
View 2 Replies View RelatedSQL Insertion - Primary Key Retrieval
Apr 12, 2007Hi there,
Is there a way to retrieve the set of primary keys from an inserted record, especially when the primary keys are generated upon insertion (ex. identity, uniqueid)? Basically I need to get the ID of the record I just inserted so that I can use it as a reference to that record in other places.
I'm using MS SQL and raw SQL commands (ie. no database interfacing objects). I'm hoping I can tag some sort of SELECT statement on the end of the INSERT command that will give me the results that I need.
Thanks!
SQL Server Data Retrieval
Jul 12, 2004Hi,
I wanted to retrieve all the databases present in an SQL Server and put them in an Dropdown list.
Then retrieve all tables of the selected database
and finally retrieve all data from the selected table (This i know)
How do i accomplish the above two.
Regards
Vijay R
Duplicate Records Retrieval
Jun 23, 2008I want to remove duplication entries on the basis of compaparing
ApID,StID,CreationDate.If three match only i shoul get result set for deletion
ID ApID StID RoleID CreationDate
40100522008-01-31 20:27:03.850
41101522008-01-31 20:27:03.850
42101522008-01-31 20:27:03.850
90110118122008-01-31 20:27:03.850
90210118122008-01-31 20:27:03.850
90310127422008-01-31 20:27:03.850
30251013422008-02-22 11:43:39.153
90410147422008-01-31 20:27:03.850
30021016422008-02-22 11:28:34.513
317010179422008-02-22 12:35:17.450
9061019422008-01-31 20:27:03.850
43102522008-01-31 20:27:03.850
90710208122008-01-31 20:27:03.850
90810217422008-01-31 20:27:03.850
319410227422008-02-22 12:43:46.030
90910238122008-01-31 20:27:03.850
475010248122008-05-23 14:27:45.317
91210278122008-01-31 20:27:03.850
475110288122008-05-23 14:27:45.317
2638103522008-02-21 16:26:19.877
25711031501282008-02-19 14:23:57.610
32051031422008-02-22 12:47:32.653
91510327422008-01-31 20:27:03.850
310310398122008-02-22 12:08:32.043
2639104522008-02-21 16:26:19.877
91810407422008-01-31 20:27:03.850
9191041422008-01-31 20:27:03.850
32061042422008-02-22 12:47:50.903
92010439422008-01-31 20:27:03.850
9221045422008-01-31 20:27:03.850
32081046422008-02-22 12:48:11.857
9241048422008-01-31 20:27:03.850
32091049422008-02-22 12:48:30.687
2640105522008-02-21 16:26:19.877
92610507422008-01-31 20:27:03.850
31561051522008-02-22 12:27:06.700
92710529422008-01-31 20:27:03.850
92810537422008-01-31 20:27:03.850
309810548122008-02-22 12:07:00.000
30441055522008-02-22 11:50:26.373
9291056422008-01-31 20:27:03.850
93010588122008-01-31 20:27:03.850
93110599422008-01-31 20:27:03.850
44106522008-01-31 20:27:03.850
31611060422008-02-22 12:29:31.687
93310617422008-01-31 20:27:03.850
93410629422008-01-31 20:27:03.850
317410637422008-02-22 12:36:24.170
9351064422008-01-31 20:27:03.850
9361064422008-01-31 20:27:03.850
93810679422008-01-31 20:27:03.850
93910689422008-01-31 20:27:03.850
31101069422008-02-22 12:10:33.467
94010707422008-01-31 20:27:03.850
94110707422008-01-31 20:27:03.850
94210707422008-01-31 20:27:03.850
94310707422008-01-31 20:27:03.850
321910717422008-02-22 12:51:09.687
94410729422008-01-31 20:27:03.850
9451073422008-01-31 20:27:03.850
322110748122008-02-22 12:51:53.560
32221075422008-02-22 12:52:18.373
94610768122008-01-31 20:27:03.850
9471077422008-01-31 20:27:03.850
32231078422008-02-22 12:52:41.717
94810799422008-01-31 20:27:03.850
322010809422008-02-22 12:51:30.467
Query Retrieval Is Slow
Nov 23, 2005Hi,I am using MS Access as the front end and it's using ODBC link to connectto the backend tables residing at SQL SERVER.I have some queries that are doing some calculation and the time taken toretrieve the data has been quite slow.The no of data in that table is around 500K records. and the tables havealready got the PKs defined.How can i improve the performance of the query besides converting to SQLViews or SP(this is going to be diffcult as i am getting some filterparameters from the forms in MS Access) ?Or what further checks shld i be doing to find out the cause. I have donePerformance Monitor and the CPU processing% is around 20 - 55% while runningthose querieskindly advisetks & rdgs--Message posted via SQLMonster.comhttp://www.sqlmonster.com/Uwe/Forum...eneral/200511/1
View 9 Replies View RelatedData Retrieval Using IDataReader
Nov 16, 2007Code Block
string commandString = "SELECT Id,Name FROM [DatabaseTable];";
using (SqlConnection conn = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(commandString, conn);
conn.Open();
IDataReader rdr = cmd.ExecuteReader();
IList ids = new List();
IList names = new List();
while (rdr.Read())
{
ids.Add((int)rdr[0]);
names.Add((String)rdr[1]);
}
rdr.Close()
}
What i want to know is if there is any better way of obtaining the 'id' and 'name' data
values then just assuming that id is the first returned object and name is the second returned object in each reader record.
ie. Is there any way to retrieve a specific field from the reader in a Dictionary-type manner...?
Code Block
while(rdr.Read())
{
ids.Add( (int)rdr["Id"] );
names.Add( (String)rdr["Name"] );
}
How To Save Image In Sql Server And Display That Image In Datagrid??
Jun 27, 2007Hay Friend's
Can u plese send me the way how to save image in sql server and display that images in datagrid or other control also like Image control or Image control Button?? Plese send the coding in C#.
Thank's
Amit
How To Store Image In Image Field In Sql Server 2000
Jul 12, 2007
hi all,
i have created a table with image field in it. Now i just want to store a jpeg file in it but not finding any way to do so.
how can i store any image ? what are the steps???????
thanx in advance
HOW To Retrieve An Image From Sql Server And Display It In ASP.net Using Imagemap Or Image ?
Jul 6, 2006Ok, the problem is that , i have a field called "Attach" in sql of type image, when selecting it , the field is getting data of type BYTE(). which am being unable to display them on an Image on the panel.
using the following vb.net code:
'Dim sel2 As String
'Dim myCom As SqlCommand
'Dim conn As New SqlConnection
'Dim drr As SqlDataReader
'Dim image As System.Drawing.Image
'sel2 = "select * from attach where att_desc = '" & DropDownList1.SelectedItem().Text & "' and doc_code = " & w_doc_code & " and subcode = " & w_doc_subcode & " and doc_num= " & w_doc_num & " "
'conn.ConnectionString = ("server=developer01;uid=sa;password=aims;database=DVPSOC;timeout=45")
'myCom = New SqlCommand(sel2, conn)
'conn.Open()
'drr = myCom.ExecuteReader()
'If drr.Read Then
' Me.ImageMap1.ImageUrl = drr.Item("attach")
'End If
'conn.Close()
Am getting an exeption on the following line Me.ImageMap1.ImageUrl = drr.Item("attach")
saying: Conversion from type 'Byte()' to type 'String' is not valid.
knowing that i tried converting using ToString but it's not getting any output then.
thanks for your help.
Data Retrieval Terribly Slow
Jul 27, 2006Hi,
I'm using ASP.NET 1.1, SQL Server 2000 Server:
I followed the ASP.NET 1.1 Starter Kit's Commerce application and applied the same principles it had written the code to retrieve data to my web application I created. For example I've written this Function in a class to return a sqldatareader:
Public Function GetAdvanceSearch(ByVal s As String, ByVal Ext As Integer, ByVal fdate As DateTime, ByVal tdate As DateTime) As SqlDataReader
Dim oDrAdSearch As SqlDataReaderDim oCmdGetSearch As New SqlCommand("spAdvanceSearch", oComConn)
With oCmdGetSearch .CommandType = CommandType.StoredProcedure .Parameters.Add(New SqlParameter("@DialNo", SqlDbType.VarChar)).Value = s .Parameters.Add(New SqlParameter("@FDate", SqlDbType.DateTime)).Value = fdate .Parameters.Add(New SqlParameter("@TDate", SqlDbType.DateTime)).Value = tdate .Parameters.Add(New SqlParameter("@Ext", SqlDbType.Int)).Value = ExtEnd With
oComConn.Open()oDrAdSearch = oCmdGetSearch.ExecuteReader(CommandBehavior.CloseConnection)
If oDrAdSearch.HasRows Then Return oDrAdSearchElse Return NothingEnd If
End Function
And When I'm calling this function I do write in this way (assuming that this function is in a class called "Calls"):
Dim objCalls as New Calls
DataGrid1.DataSource = objCalls.GetAdvanceSearch(<PARAMS.......>)DataGrid1.Databind
My application is a Telephone Call Recording System and could expect vast amount of data. Averagely, a month may produce approximately 50,000 records or more. So while querying through my web application for a month, the application itself either gets stuck or the retrieval speed gets drastically slow. However I'm using Datareaders for every querying scenario. My Web application is hosted in a Windows 2000 Server and accessed via Local Network or IntraNet.
What are the ways I could make this retrieval more speedier and efficient? I would like to hear from anyone who have come across this problem and anyone who could help me on this.
Thanks in Advance. Looking forward for a reply from some one.
Help Regarding Storing And Retrieval Of Files In Sql Server
Oct 29, 2004Hi,
Thanks in advance.
I need help(Tutorials or online links) regarding storing and retrieval of files in Sql server (BLOB) using ASP.net and C#.
Secondly,Is it possible to search file in BLOB using SQL server Full text search service.