Hello,
I could save the file in the sql server database. The problem i am having is, I am not able to read the document from the database. I do not want to use response.outputstream......
I have to read the file for specific contents. Anyhelp would be great.
- Suresh
I use this code to get Tiff files from db , but output file seems to be corrupted :
Dim pubsConn As SqlConnection = New SqlConnection("Server=(local);uid=sa2;pwd=sony;database=pubs;") Dim logoCMD As SqlCommand = New SqlCommand("SELECT pub_id, logo FROM pub_info", pubsConn)
Dim fs As FileStream ' Writes the BLOB to a file (*.bmp). Dim bw As BinaryWriter ' Streams the binary data to the FileStream object.
Dim bufferSize As Integer = 100 ' The size of the BLOB buffer. Dim outbyte(bufferSize - 1) As Byte ' The BLOB byte() buffer to be filled by GetBytes. Dim retval As Long ' The bytes returned from GetBytes. Dim startIndex As Long = 0 ' The starting position in the BLOB output.
Dim pub_id As String = "" ' The publisher id to use in the file name.
' Open the connection and read data into the DataReader. pubsConn.Open() Dim myReader As SqlDataReader = logoCMD.ExecuteReader(CommandBehavior.SequentialAccess)
Do While myReader.Read() ' Get the publisher id, which must occur before getting the logo. pub_id = myReader.GetString(0) ' Create a file to hold the output. fs = New FileStream("\Server1shared1logo" & "KK" & ".tiff", FileMode.OpenOrCreate, FileAccess.Write) bw = New BinaryWriter(fs)
' Reset the starting byte for a new BLOB. startIndex = 0
' Read bytes into outbyte() and retain the number of bytes returned. retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize)
' Continue reading and writing while there are bytes beyond the size of the buffer. Do While retval = bufferSize bw.Write(outbyte) bw.Flush()
' Reposition the start index to the end of the last buffer and fill the buffer. startIndex += bufferSize retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize) Loop
' Write the remaining buffer. bw.Write(outbyte, 0, retval - 1) bw.Flush() ' Close the output file. bw.Close() fs.Close() Loop
' Close the reader and the connection. myReader.Close() pubsConn.Close()
Me.Div1.InnerHtml = ("<embed height=650 width=100% toolbar='' src= '" & "\Server1shared1logoKK.tiff" & "' type='application/x-alternatiff'>")
We have an interface where we receive data from an external supplier. One of the fields in the interface is of type BLOB (the source is an Oracle database), which would be read into our MSSQL database as image. This can also be converted to varbinary, and a typical field value looks something like:
0x70697A5F8F000000789C0DCCBD0DC2301....etc. etc.
However, we know that the origin only contains text, and we even know the text from the GUI they supply us with. The text could typically be "Delayed by 3 minutes because of water damage" or something like that.
What I want to do, is to extract that text from the field.
First, I have stored the incoming data stream in a table, where one column is of type varbinary(max). It looks like this goes swell. But I don't know which command to use in order to get the text extracted.
I have tried these:
1) select master.dbo.fn_varbintohexstr(Myfield) from Mytable
-> Returns just the text "0x70697A5F8...." which I have no interest in
2) select cast(Myfield as varchar(max)) from Mytable
-> Returns just Chinese signs.
3) select cast(Myfield as nvarchar(max)) from Mytable
-> Returns just Chinese signs.
4) declare @ptrval varbinary(16)
select @ptrval = TEXTPTR(MyField) from MyTable  -- with MyField defined as image
READTEXT MyTable.MyField @ptrval 1 30
-> Returns just the text "0x697A5F8...." which I have no interest in
Of course, since only text is stored in this field, the field should never have been defined as BLOB in the first place. But the source system is external, and it's a standard system, so we may not alter it in any way.
Hi all,
I have a replicated table with a column which is used to store sound files - it is of type varbinary(MAX).
What is the best way to store a file from the filesystem inside this column on the PDA side (i.e. inside SQL Server CE) without loading the whole file into the PDA's memory, i.e. using some sort of buffering?
On full SQL Server 2005 I make use of UPDATE.WRITE() to save buffers inside the column - is there an alternative to this on SQL Server CE? Can anyone provide sample code / point me to samples that deal with SQL Server CE & BLOBs.
Thanks for your help!
I have the file with binary data on my hard disk.
Also I have the table in the database with image field.
I want to load binary data from file to this field. Does any body know how can i do it?
I want to do it using only T-SQL, without any С# (etc.) coding - only sql script is properly.
I would like to extract a file from a database. The file is stored in a BLOB format
Can I extract the BLOB file from the database using an SQL code/command or is there another way in which I can extract the file?
The file is stored as a BLOB but is actually a ZIP file (if that makes any difference)
What is the normal method of extracting a BLOB file?
I was putting a database together (its a C# application MSSQL)  the application will handle a few hundred customers records and save  maybe a couple of thousand  word docs/images/other doc files wondered if the way to go was blob or filestream, I see the medium and larger databases seem to go for filestream but just wondered as not much mentioned about smaller dbs.I do not think  security/disk space/super fast access  will be a big issue.
View 4 Replies View RelatedWe 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?
I have a table in a SQL Server database that contains a field(data type image) that contains a text file. I'm trying to retrieve this file and save it onto the hard drive. I'm using the code below, but get I get the error 'Arguments are of the wrong type, are out of acceptable range, or are in conflict with one another.' at line 11. This code worked fine when I tested it on the pubs database and exporting the logo field out of pub_info. I'm not quite sure why this doesn't work for my database. Can anyone see where I'm going wrong?
1 Dim cn As ADODB.Connection2 Dim rs As ADODB.Recordset3 Dim mstream As ADODB.Stream
4 cn = New ADODB.Connection5 cn.Open("Provider=SQLOLEDB;data Source=server;Initial Catalog=database;User Id='userid';Password='password'")
6 rs = New ADODB.Recordset7 rs.Open("Select * from filesubmissions where bundleId = 'F0000014.bun'", cn, ADODB.CursorTypeEnum.adOpenKeyset, ADODB.LockTypeEnum.adLockOptimistic)
8 mstream = New ADODB.Stream9 mstream.Type = ADODB.StreamTypeEnum.adTypeBinary10 mstream.Open()11 mstream.Write(rs.Fields("BLOB").Value)12 mstream.SaveToFile("c:export.txt", ADODB.SaveOptionsEnum.adSaveCreateOverWrite)
13 rs.Close()14 cn.Close()
Thanks
I have this code that I hacked together from someone else's example. I kind of understand how it works. I just don't know if it will and i am not in a location right now to check. I was wondering if I did this correctly first, second how can it improve and should i do something different. Basically i just want to check the password in a database. I am passing the username and password to this function from another functioprivate bool authUser(string UserName, string Password){ string connectionString = ConfigurationSettings.AppSettings["DBConnectionString"]; SqlConnection DBConnection = new SqlConnection(connectionString); bool result = false; DBConnection.open() SqlCommand checkCommand = new SqlCommand("SELECT password FROM Users WHERE userName='" + Password + "', DBConnection) SqlDataReader checkDataReader = checkCommand.ExecuteReader();
if(checkDataReader.GetString(0) == Password) { result = true; } else { result = false; } checkDataReader.Close(); DBConnection.Close();
return result;}Thank you Buddy Lindsey
In SQLServer database i have stored a blob using updateblob function,
type of the table column is image.
When i use Selectblob statement to get the blob into a blob variable, i am getting only 32 KB of data. But with ASA i am getting the complete data..
How to get Complete data in SQL Server?
regds.,
ranga
1. How many blob data types can be defined in a table on SQL Server 7.0
2. What is the max size for a blob data type.
Hello all!
I am currently building a website and have reached a brickwall called SQL..
I hope this is ok to post on this forum I wasn't sure if I had come to the right place!
Basically I have an SQL database on my server and I would like to have my website access it and update information on a page i.e. :
Item Name: Quantity Sold: Price:
T-shirt 50 $10
Jeans 25 £20
How easy is such a thing to do as I have a very limited knowledge of SQL and especially incorporating it into web code..
Thanks!
jake
i'm working in microsoft sql server and i got following problem:
I have a text files Asia.txt in E: folder with some data in it as shown below
Asia.txt
1, Mizuho, Fukushima, Tokyo
2, Minika, Pang, Taipei
3, Jen, Ambelang, India
4, Jiang, Hong, Shangai
5, Ada, Koo, HongKong
And I have a table Region, in the database Companies, as shown below.
1>CREATE TABLE REGION (ID INT,REGION VARCHAR(25),DATA varbinary(MAX))
2>GO
I queried all the data from Asia.txt, using the OPENROWSET function.
1>INSERT INTO REGION (ID, REGION, DATA)
2>SELECT 1 AS ID, 'ASIA' AS REGION,
3> * FROM OPENROWSET( BULK 'E:Asia.txt',SINGLE_BLOB)
4>AS MYTABLE
5>GO
it occupied some memory then i deleted this record using follwoing query
1>DELETE REGION
2>GO
then it deletes the record successfully but memory is not getting freed
can anyone help me out on this problem
Hi Everyone,
I am looking for some help, as i am pulling my hair out looking for information.
I have been using asp for many years and am now starting to learn .net. so far so good....
I am now wanted to connect to a database, execute a simple select statement and then read/write the information out. I can't help but think in old asp code and i am having a hard time finding what i need to perfom this simple task.
I have used the grid controls etc, and these are very good - however, i need to connect to a database in the code-behind file and perfom various functions in the background.
If any of you could be so kind as to perhaps show me some demo code i would be grateful.
I would like to do:
A) Connect to a database (sql server 2000)B) Execute a simple SQL select statementC) Read the returned informationD) put this information into variables used elsewhereE) how do you check if no records are returned? such as the .EOF in asp?
Many thanks
Darren
I am able to upload a jpeg to a sql 2000 database into a column called graphic, the datatype is an image. for some reason i can read the image and have it displayed! this is driving me insane. any help would be greatly appreciated. here is the code to upload. and below that is the code to display the image.UPLOAD CODE If Not IsNothing(txtfileupload.PostedFile) Then 'Determine File Type Dim strExtension As String = Path.GetExtension(txtfileupload.PostedFile.FileName).ToLower() Dim strContentType As String = Nothing Select Case strExtension Case ".gif" strContentType = "image/gif" Case ".jpg", ".jpeg", ".jpe" strContentType = "image/jpeg" Case ".png" strContentType = "image/png" End Select 'Load FileUpload's InputStream into Byte array Dim imageBytes(txtfileupload.PostedFile.InputStream.Length) As Byte txtfileupload.PostedFile.InputStream.Read(imageBytes, 0, imageBytes.Length) 'INSERT DATA INTO DATABASE Dim objSQLConn As SqlConnection Dim strSQL As SqlCommand objSQLConn = New SqlConnection("server=srvdb1.rrg.local;uid=rsusr;pwd=Letmein123;database=rsdb") strSQL = New SqlCommand("insert into rsdata (graphic,contenttype,fname,lname,nname) values(@graphic,@contenttype,@fname,@lname,@nname)", objSQLConn) strSQL.Parameters.AddWithValue("@graphic", imageBytes) strSQL.Parameters.AddWithValue("@contenttype", strContentType) strSQL.Parameters.AddWithValue("@fname", txtfname.Text) strSQL.Parameters.AddWithValue("@lname", txtlname.Text) strSQL.Parameters.AddWithValue("@nname", txtnname.Text) objSQLConn.Open() strSQL.ExecuteNonQuery() objSQLConn.Close() lblStatus.Text = "Records uploaded" End If CODE TO DISPLAY Dim objSQLConn As SqlConnection Dim strSQL As SqlCommand Dim objSQLDataReader As SqlDataReader objSQLConn = New SqlConnection("server=srvdb1.rrg.local;uid=rsusr;pwd=Letmein123;database=rsdb") objSQLConn.Open() strSQL = New SqlCommand("select graphic, contenttype from rsdata", objSQLConn) objSQLDataReader = strSQL.ExecuteReader()While objSQLDataReader.Read() Response.ContentType = objSQLDataReader("contenttype") Response.BinaryWrite(objSQLDataReader("graphic"))End While objSQLDataReader.Close() objSQLConn.Close()%>
View 1 Replies View RelatedHello,I'm successfully using SqlDatSource to read data from SQL Server on a networked machine. Obviously I'd like to be able to update, edit or delete data, but the 'Advanced Sql Generation Options' in the SqlDatSource are greyed out.The result is that when I try and edit, update or delete I get this message Updating is not supported by data source 'SqlDataSourceDetails' unless
UpdateCommand is specified. Which makes sense because the options havn't been specified.I'm thinking this is probably a server side permissions issue but I've been through everything I can see and am now basically stuck.Any help would be appreciated Many thanks
Hi all I've a page which shows data (25-30 entries) that are retrieved by an SqlDataSource. The query is very simple since i don't have to join any table.unfortunately sometimes I get the following error message. It's strange, since the page often works fine but the error occurs a couple of times per day.Who has an idea of how I could solve this problem?
Server Error in '/' Application.
I have created a typed-dataset AuthorsDataSet and created a table in with name Authors, manually by right-click > New > Table. I have kept the data-types, sizes and contstriants exactly same as the table in the database, though I have kept the Column names different. I am filling the AuthorsDataSet with the following code on Form_Loadif (!IsPostBack)
{ SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["pubsConnectionString"].ConnectionString);
SqlCommand cmd = new SqlCommand("SELECT au_id, au_lname, au_fname, phone, address, city, state, zip, contract FROM authors", conn); using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
conn.Open();
da.Fill(ds.Authors);
grdAuthors.DataSource = ds.Authors;
grdAuthors.DataBind();
conn.Close();
}
conn.Dispose();
cmd.Dispose();
}
The connection string is as follows:<connectionStrings>
<add name="pubsConnectionString" connectionString="Data Source = localhost; Initial Catalog = pubs; Integrated Security = SSPI"/>
</connectionStrings>
The following error occurs when I run the page
System.Data.ConstraintException: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
Halo, I am a bit new to this
Please can someone help me, I would like to write a file(Any type) to a SQL database like a attached document(s) for the current record and be able to detatch the document when needed.
I use VB.NET for a ASP.NET app.
I basicly would like to attach documents to a piece of equipment may it be any kind and if the user views the equipment he will be able to detatch the documents for that piece of equipment and open it with the correct software.
PLEASE HELP!!!!!!!
Hi i use sql server 2000 and i found problem in my database that is
when i write arabic language and closing my table and open it again i found all my data like question mark.
what can i do to save my data with arabic language.
note i use windows 2000 server.
I have a database that contains news items. There's a column that contains the actual article. In that field, there are paragraphs with page breaks. The page breaks in the database are represented as squares (unrecognizable characters I guess). When I try to read in the data, it doesn't recognize the page breaks, and it comes out all in one large paragraph. Is there any way to get around this?
View 2 Replies View Related
Hi,
I have a data structure called 'Quote' which contains a number of different variables and controls ranging from text boxes, check boxes and radio buttons, i need to be able to read and write this from a database.
First I think a description of my overall project is needed:
Project Description
I have been given a brief that basically says: i have to create a programmed solution in VB to solve a problem. This problem can be anything we like, and I personally have chosen to create a program that manages quotes for building Log Cabins (this is very contrived and far from anything someone would do in the real world).
My solution will allow a generic user to create a quote (using a form with controls such as text boxes, check boxes, radio buttons) , and then save this to file. These users may then wish to load/edit this quote at a later date, from another form.
Whilst completing this project, i'll only have up to about 5 records (quotes) within the system, so i dont need the ability to store hundreds of records. And each record will be relatively short, with only about 10-15 data items within the data structure.
Also the Admin (or business owner in this case) need to be able to view all saved quotes in a presentable format, and edit them if needs be, from within this same program.
This solution does not need to be absolutely perfect and 100% efficiently coded, or have all the bells and whistles a real-world program would have. This is for an A level computing project by the way.
So basically, i need to be able to read from the database (to populate a Data Grid (i imagine this is best way?)) and so Admin can access any quote and edit it (editing is not vital, but viewing/printing is. Maybe i should stop at just viewing any quote?). Also i need generic users to be able to fill in the Edit Quote form and then save this data into the database.
And is a data structure really required for me to use a database?
I've never used databases in VB before (but have used them elsewhere, mainly Access) and so am completely new to this. Any help will be much appreciated.
Thanks
Hi, i'm writing a SOCKET Port Listener for a Database, it must be multi-threaded and listen on a port for a record that when it comes in, it must write the record to the SQL database (MS SQL Server). I've got the listener to read the data over the port already and write the record into a string which i have already sliced up. Now i need to create a connection to the database and insert the variables into the database.
If Someone will please be able to give me a rough idea of how i could accomplish this with some sample code, then i will be greatful, i'm new to C#, but here is my code that i have so far.
//This is the Connection that i have made and where i am currently stuck, i dunno how to go further. Any help will be welcome.
public class ConnectionToMSDatabase
{
public void InsertDataIntoDatabase(string TableName, string connectionString, string dataFields)
{
string InsertSQLStatement;
InsertSQLStatement = "INSERT INTO " + TableName + " VALUES (" + dataFields + ")";
OleDbConnection ConnectionToDatabase = new OleDbConnection(connectionString);
ConnectionToDatabase.Open();
OleDbCommand command = new OleDbCommand();
command.Connection = ConnectionToDatabase;
command.CommandText = InsertSQLStatement;
command.ExecuteNonQuery();
command.Connection.Close();
}
}
//Here is my connection string, all the retrieved data is stored in a string array call fullRecord
ConnectionStringToDatabase = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;User ID=" +
"Administrator" + ";Initial Catalog=FORGE;Data Source=FORGE";
Hi,
I want to load a file into a blob column using a stored proc. The file will be on a UNC path on the network. Is there a system stored proc or any utility that can be fired off from the sp, using xp_cmdshell that will take a file path from the filesystem and load it into a blob column in a database table.
I have worked with blob fields in the past but in those instances I loaded the blobs into the database from front end ADO.net code. This time around I need to pull this off stricktly from a stored proc.
Any help will be appreciated.
thank you.
Hi everyone I have a directory that contains a lot of text files that have data I need to draw from. I want to know if it is possible to write a program that will read all of the text files in the directory and pull out data and save it to a new textfile. For example: Each text file is formatted this wayColumn1, Column2, Column3"1","xxxx","yyyy""2", "xxxx", "yyyy""3", "XXXX", "yyyy" I want to put all lines that begin with 1 in one text file, all the lines that begin with two in another text file, and the same with all lines that begin with 3. my problem is I want to be able to point at the folder that contains those files and have it read every text file in the folder and perform the operation. If this is possible can someone point me in the right direction on how to get started.Thank you for any help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
View 1 Replies View RelatedHi all,I'm a complete newbie on ASP.Net.I want to get some data out of a SQLserver Database running on my system with SQL Server 2005 Express. The name of the Database is 'tempdb' and the table is called "Members". the SQLServer runs as Local System with the Windows account.When I try to open the site, I always get the same error:Invalid object name 'Members'I don't know what to do anymore. I read a post, where anybody set the rights for the owner, but my database is running with the Windows account.Here is the Code of the page so far:<%@ Page Language="VB" Debug="True" Strict="True" %><%@ Import Namespace="System.Data" %><%@ Import Namespace="System.Data.SQlClient" %><script runat="server">Sub Page_Load (ByVal Sender As Object, _ ByVal E As EventArgs) Dim connStr As String connStr = "Provider=Microsoft.Jet.OLEDB.4.0;" connStr += "database=tempdb;" connStr += "Truster_Connection=yes"
Dim conn As New SQLConnection(connStr) conn.Open() Dim sql As String sql = "SELECT COUNT (*) FROM Members" Dim cmd As New SQLCommand(sql, conn) Dim ergebnis As String ergebnis = cmd.ExecuteScalar().toString() Dim t As String t = "Die Tabelle Members hat " & _ ergebnis & " Zeilen. <br>" & _ "Das Kommando lautet: " & _ cmd.CommandText & "<br>" & _ "Der Kommandotyp ist: " & _ cmd.CommandType ausgabe.innerHTML = t End Sub</script><html><head><title>Demo zu SQLCommand.ExecuteScalar</title></head><body><h3>Demo zu SQLCommand.ExecuteScalar</h3><p runat="server" id="ausgabe" /></body></html>Thanks for your help an sorry for my english.GreetsFlash_Prince
A little background on what I am trying to achieve first. We are moving to Azure virtual machines and we will have 8 disks on the SQL Server box. I am adding more files to the primary file group and each file will go on its own drive. I am then rebalancing data across these files by rebuilding all of the indexes on the tables which is working fine. No problems so far all is good.
I now have an additional problem. If there is a lob or blob column on the table, rebuilding the clustered index and all the non clustered indexes doesn't rebalance the blob or lob data across the disks such as it does with in row data.
I cannot find any articles on rebalancing lob or blob data because all the articles say to move to a new file group. I do not want a new file group, I just want to use the primary file group where the data already resides, and just redistribute it evenly in the same way that I can in row data which is working fine.
One solution I thought about was to BCP data out of the table, truncate the table and then BCP back into the table which I imagine would have the desired effect of distributing the data evenly over the files.
Basically i have 3 images capacity per record in my asp.net application. In there i am saving the image path with record id in database and image in my application folder.
Now i am creating SSRS Report in Report builder . In there i have taken one image control to show the images. In the Image properties in report builder i have chosen database under the select the image source field. then inside use this field i have chosen image url and in use this MIME Type i have selected image/jpeg. Now i have saved this report in report server folder.
Now while calling in .net web from through report viewer control. It is opening the report but wont showing the image.
I have an Excel sheet that is dynamically updated (through DDE) and I want to import this data to a table in SQL Server 2005. Using SQL Server Management Studio to configure an Excel data source as a linked server.
(http://support.microsoft.com/kb/306397/EN-US/)
Following the first 5 steps should let me acces the table (but I cannot view the data in SQL Server 2005). However, I could not find how to export the data into an existing table. Does anyone know how or can give a pointer to document describing how to do this?
I am using sql server 2005.and planning on putting my html pages into the sql server as to many editting is going on the web site.(a news site) what are pros and cons using sql server as a holder of the aspx.HTML code ?*using a varchar(MAX) field for htmlcode thanks
View 1 Replies View Relatedok I use a datareader..Perhaps not the best method..but...if a better one exsits please let me know...
The problem...
I get info on a user....It returns an unknown amount of rows back....lets say two for instance....
ok...
How do I tell the number of rows....also the ability to reference each row and items in that row....
..
i.e. Row contains this
uname | password | address | Phone | notes
Like I said could contain multiple rows
I need to figure out info for specific rows and items in it....
in datareader I know you can reference each item which I guess you could use x number of variables to get each item in the row but that is tedious....
IS there a better answer????
Hi
I am using the following example for reading images.
But, I want to attach the image to independent ASP.NET image control. Not in a datagrid.
Any ideas on how to do that? Please explain.
Thanks
P.