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Memory release problem with export to PDF

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MikeK asked on 07 Jul 2009, 07:38 PM
I have a report that I need to run automatically and generate sets of PDF files to specific folders on a network share drive, each with a unique name. I had setup a quick project with MS Access and was able to do this, although it's a bit buggy. For production I recoded the report into a Winform app using Telerik Reporting Q1 2009. The app does function as intended, but I noted that the machine gobbles all of the memory. I can watch the app run and as it's generating new PDFs, the memory use just continues to climb. I tried to do what I figured would release the memory, but it's not working.

Here's my code, did I miss something? How do I get the application to quit grabbing memory as it runs?

The report has 2 subreports included on the same page.

----Routine start---
        Dim con As New SqlConnection(My.Settings.CCO_MM_DATA)

        Dim sql As String = "usp_RptFaceSheet_ClientList_DIST"
            Dim da As New SqlDataAdapter(sql, con)
            Dim ds As New DataSet

            'Get Data Table
            Dim dt As DataTable = ds.Tables(0)

            'Display Data
            For Each row As DataRow In dt.Rows
                If Directory.Exists("S:\Development\FaceSheets\" & row(2).ToString) Then
                    Me.ReportViewer1.Report = New TestFaceSheet.Report1

                    TryCast(ReportViewer1.Report, TestFaceSheet.Report1).ReportParameters(0).Value = Int32.Parse(Trim(row(0).ToString))
                    Dim mimType As String = String.Empty
                    Dim extension As String = String.Empty
                    Dim encoding As Encoding = Nothing
                    Dim deviceInfo As Hashtable = New Hashtable
                    deviceInfo("FontEmbedding") = "None"
                    Dim buffer As Byte() = ReportProcessor.Render("PDF", ReportViewer1.Report, deviceInfo, mimType, extension, encoding)
                    Dim fs As New FileStream("S:\Development\FaceSheets\" & Trim(row(2).ToString) & "\[" & Trim(row(1).ToString) & "]ClientInfo.pdf", FileMode.Create)
                    fs.Write(buffer, 0, buffer.Length)

                End If


        Catch ex As Exception

        End Try
----Routine end----

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Telerik team
answered on 08 Jul 2009, 11:57 AM
Hello MikeK,

Currently we do not have any caching mechanism and every time the report is previewed, paged or exported through the viewer it is processed and rendered from scratch. Our current goal is to cover some reporting functionality we still lack and then we will move to the performance optimizations and productivity which are already in our TODO list and we hope we will soon have the chance to work on it.
Nevertheless we're improving the performance with every single release and Q2 2009 is not an exception, so we highly recommend upgrading to it.

Best wishes,
the Telerik team

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