ASP.NET

Dim sFullPath As String = sServer + sFolder + sFile

Dim wcClient As WebClient = New WebClient()

Dim obj As UserManager = New UserManager
obj.CreateIdentity("user1", "Server1", "password")

Dim buffer As Byte() = wcClient.DownloadData(sFullPath)

Response.ClearContent()
Response.AddHeader("Content-Disposition", "inline; filename=userdoc" + oDocument.FileExtension.ToString)
Response.ContentType = returnExtension(oDocument.ContentType.ToString)
Response.AddHeader("content-length", buffer.Length.ToString)
Response.BinaryWrite(buffer)

obj = Nothing

Declare Auto Function LogonUser Lib "advapi32.dll" (ByVal lpszUsername As String, _
    ByVal lpszDomain As String, ByVal lpszPassword As String, ByVal dwLogonType As Integer, _
    ByVal dwLogonProvider As Integer, ByRef phToken As IntPtr) As Integer

   Declare Auto Function CloseHandle Lib "kernel32.dll" (ByVal handle As IntPtr) As Boolean

   Public Sub CreateIdentity(ByVal User As String, ByVal Domain As String, ByVal Password As String)
       Dim tokenHandle As New IntPtr(0)
       Dim ret As Integer
       Dim LOGON32_PROVIDER_DEFAULT As Integer = 0
       Dim LOGON32_LOGON_NETWORK_CLEARTEXT As Integer = 3

       tokenHandle = IntPtr.Zero
       Dim returnValue As Boolean = LogonUser(User, Domain, Password, LOGON32_LOGON_NETWORK_CLEARTEXT, LOGON32_PROVIDER_DEFAULT, tokenHandle)
       If False = returnValue Then
           ret = Marshal.GetLastWin32Error()
           Throw New Exception("LogonUser failed with error code: " + ret.ToString)
       End If
       Dim id As New WindowsIdentity(tokenHandle)
       CloseHandle(tokenHandle)
       id.Impersonate()
   End Sub

Operation must use an updateable query.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.OleDb.OleDbException: Operation must use an updateable query.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[OleDbException (0x80004005): Operation must use an updateable query.]
   System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr) +1002416
   System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult) +255
   System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult) +188
   System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult) +58
   System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method) +161
   System.Data.OleDb.OleDbCommand.ExecuteNonQuery() +113
   aspnetforum.Utils.User.UpdateLastLogonDate(Int32 userId) +208
   aspnetforum.ForumPage.OnInit(EventArgs e) +1686
   System.Web.UI.Control.InitRecursive(Control namingContainer) +333
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +378


Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053

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