Execution ID Is Lost After Pressing The Back Button (drill-through Reports)

Hi there,

I'm using the reportviewer control to display a drill-through serverreport. Here is the code in my code-behind file:

Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init

Dim strReportPath As String = "/Public Reports/adfront/dealermodel/myreportname"

Dim paramUniqueID As New ReportParameter()

If Not Page.IsPostBack And Me.ReportViewer1.ServerReport.IsDrillthroughReport = False Then

Session("uniqueid") = Request.QueryString("uniqueid").ToString

'Set the report server URL and report path

Me.ReportViewer1.ServerReport.ReportServerUrl = New Uri("http://localhost/reportserver")

Me.ReportViewer1.ServerReport.ReportPath = strReportPath

Me.ReportViewer1.SizeToReportContent = True

Me.ReportViewer1.AsyncRendering = False

Me.ReportViewer1.ShowBackButton = True

Me.ReportViewer1.ShowFindControls = False

Me.ReportViewer1.ShowPageNavigationControls = False

Me.ReportViewer1.ShowParameterPrompts = False

Me.ReportViewer1.ShowPromptAreaButton = False

Me.ReportViewer1.ShowZoomControl = True

Me.ReportViewer1.ZoomMode = ZoomMode.FullPage

'Set the processing mode for the ReportViewer to Remote

Me.ReportViewer1.ProcessingMode = ProcessingMode.Remote

'Set the report parameters for the report

paramUniqueID.Name = "uniqueid"

paramUniqueID.Values.Add(Session("uniqueid"))

Dim parameters() As ReportParameter = {paramUniqueID}

Me.ReportViewer1.ServerReport.SetParameters(parameters)

End If

Me.ReportViewer1.ServerReport.Refresh()

End Sub



Protected Sub ReportViewer1_Drillthrough(ByVal sender As Object, ByVal e As Microsoft.Reporting.WebForms.DrillthroughEventArgs) Handles ReportViewer1.Drillthrough

While (Me.ReportViewer1.ServerReport.IsDrillthroughReport)

Me.ReportViewer1.PerformBack()

End While

'Me.ReportViewer1.ServerReport.ReportPath = e.ReportPath

'Me.ReportViewer1.ServerReport.GetParameters()

Me.Label1.Text = Me.ReportViewer1.ServerReport.ReportPath

End Sub

When I drill-through the report and hit the (browser) back button and try to drill-trough again I get the following error:

The path of the item "(null)" is not valid. The path must be less than 260 characters long and must start with slash. Other restrictions apply. (rsInvalidItemPath)

When I hit back again and try to export the report to eg. PDF, I get this error:
Execution 'mly2yj555oen0o45oowe1e55' cannot be found

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.Exception: Execution 'mly2yj555oen0o45oowe1e55' cannot be found

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:





[Exception: Execution 'mly2yj555oen0o45oowe1e55' cannot be found]
Microsoft.Reporting.WebForms.ServerReport.ServerUrlRequest(Boolean isAbortable, String url, Stream outputStream, String& mimeType, String& fileNameExtension) +553
Microsoft.Reporting.WebForms.ServerReport.InternalRender(Boolean isAbortable, String format, String deviceInfo, NameValueCollection urlAccessParameters, Stream reportStream, String& mimeType, String& fileNameExtension) +941
Microsoft.Reporting.WebForms.ServerReport.Render(String format, String deviceInfo, NameValueCollection urlAccessParameters, String& mimeType, String& fileNameExtension) +97
Microsoft.Reporting.WebForms.ServerReportControlSource.RenderReport(String format, String deviceInfo, NameValueCollection additionalParams, String& mimeType, String& fileExtension) +126
Microsoft.Reporting.WebForms.ExportOperation.PerformOperation(NameValueCollection urlQuery, HttpResponse response) +153
Microsoft.Reporting.WebForms.HttpHandler.ProcessRequest(HttpContext context) +202
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +154
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64





Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210

It looks like my executionid is lost on the reportserver. Does anybody knows how to fix this, so my users can use the browser back button?

Many thanx!

Ralph