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Calling Custom Code in Reporting Services

Posted on 2004-08-18
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Last Modified: 2012-08-14
Hi,

I'm trying to call a custom function in SQL Server Reporting services. The code works fine in a VB.NET window application but when run through Reporting Services I get the following error:

"Request for the permission of type System.Data.SqlClient.SqlClientPermission, System.Data, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed."

I think it is a security configuration/setting... possibly something with IIS?

Anyone have any ideas? The code is as below. Thanks.


Public Function FHNameLookUp(FNumber As String) As String

        Dim conTemp As New System.Data.SqlClient.SqlConnection("Integrated Security=SSPI;data source=local;initial catalog=Temp")
        Dim cmdTemp As New System.Data.SqlClient.SqlCommand("SELECT Name FROM Finance WHERE FinanceID = " + FNumber, conTemp)
        Dim drTemp As System.Data.SqlClient.SqlDataReader
        Dim FHName As String

        Try
            cmdTemp.Connection.Open()
            drTemp = cmdTemp.ExecuteReader(System.Data.CommandBehavior.CloseConnection)
            drTemp.Read()
            FName = drTemp.GetString(0)
            drTemp.Close()
            conTemp.Close()
        Catch E As System.Exception
            System.Console.Write("Cannot retrieve name")
        End Try
        Return FName

End Function
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Question by:DavidDunn
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Guy Hengel [angelIII / a3] earned 2000 total points
ID: 11838815
I have seen this error message also on Windows Application: when the application started from a source that was not trusted by the .net engine... I solved the problem by starting the application from a local drive instead from the network drive, and read later that one could specify/manage trusted sources for .net applications (but no details :-(
I have not yet found it, but maybe this helps you already...
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LVL 143

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by:Guy Hengel [angelIII / a3]
Guy Hengel [angelIII / a3] earned 2000 total points
ID: 11838824
http://www.dotnet247.com/247reference/msgs/38/190410.aspx

reading, I would try to change the Report Service to run under a domain account...

Hope this helps
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Author Comment

by:DavidDunn
ID: 11843190
Hi,

It appears that it was the security setting in the Reporting Services config file (as described) in the links above.

Also, I was calling an external assembly (SQLClient) and so I needed to assert permissions as below:

  Dim permission As New System.Data.SqlClient.SqlClientPermission(System.Security.Permissions.PermissionState.Unrestricted)
  permission.Assert()      

Thanks.
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LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 11849569
Glad I could help, this way I found some answers myself (so I due YOU some points :-)
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