I'm trying to retrieve an image from my ms sql server 2005, and i'm using VS2005...however, i have the following error during the compilation process
Code in webform2.aspx.vb:
Partial Class webform2
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim connstr As String = "Data Source=DCPRJ007\SQLEXPRESS;Initial Catalog=mydatabase;Integrated Security=True"
Dim cnn As New Data.SqlClient.SqlConnection(connstr)
Dim cmd As New Data.SqlClient.SqlCommand("select * from dbo.images where id=" & Request.QueryString("id"), cnn)
cnn.Open()
Dim dr As Data.SqlClient.SqlDataReader = cmd.ExecuteReader()
Dim bindata() As Byte = dr.GetValue(1)
Response.BinaryWrite(bindata)
End Sub
End Class
System.Data.SqlClient.SqlException was unhandled by user code
Class=15
ErrorCode=-2146232060
LineNumber=1
Message="Incorrect syntax near '='."
Number=102
Procedure=""
Server="DCPRJ007\SQLEXPRESS"
Source=".Net SqlClient Data Provider"
State=1
StackTrace:
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader()
at webform2.Page_Load(Object sender, EventArgs e) in C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\WebSites\WebSite7\webform2.aspx.vb:line 10
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Are you sure you are getting value in the Request.QueryString("id") ? If not, your select statement will have an incorrect syntax and so is the exception. keep a break point and debug to find out.
Thanks
||| Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim connstr As String = "Data Source=DCPRJ007\SQLEXPRESS;Initial Catalog=mydatabase;Integrated Security=True"
Dim cnn As New Data.SqlClient.SqlConnection(connstr)
Dim cmd As New Data.SqlClient.SqlCommand("select * from dbo.images where id=" & Request.QueryString("id"), cnn)
cnn.Open()
Dim dr As Data.SqlClient.SqlDataReader = cmd.ExecuteReader()
Dim bindata() As Byte = dr.GetValue(1)
Response.BinaryWrite(bindata)
End Sub
End Class
i found that...this line is highlighted during debugging, what is problem with this statement?
error message is : Incorrect syntax near '='.
thx a lot!!
Are you sure, you have some value in Request.QueryString("id") ?
Thanks
|||
gaze:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim connstr As String = "Data Source=DCPRJ007\SQLEXPRESS;Initial Catalog=mydatabase;Integrated Security=True"
Dim cnn As New Data.SqlClient.SqlConnection(connstr)
Dim cmd As New Data.SqlClient.SqlCommand("select * from dbo.images where id=" & Request.QueryString("id"), cnn)
cnn.Open()
Dim dr As Data.SqlClient.SqlDataReader = cmd.ExecuteReader()
Dim bindata() As Byte = dr.GetValue(1)
Response.BinaryWrite(bindata)
End Sub
End Class
i found that...this line is highlighted during debugging, what is problem with this statement?
error message is : Incorrect syntax near '='.
thx a lot!!
Dim cmd As New Data.SqlClient.SqlCommand("select * from dbo.images where id=" & Request.QueryString("id"), cnn)
try
Dim cmd As New Data.SqlClient.SqlCommand("select * from dbo.images where id='" & Request.QueryString("id") & "'", cnn)
means ... use single cote before and after the your id.
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