Microsoft.Reporting.WinForms Memory Usage

Question

I am using Microsoft.Reporting.WinForms in an application and I have the problem that when I compile the program in 32-bit (x86) mode, we have limited memory space to use (approximately 2 GB). When the user displays a Dynamic Report and moves around in it, or when he closes the report and opens it again, it always occupies more memory space. The memory space is never released. This is a serious problem. Is there a way to make the program release the memory so that the problem of exceeding 2 GB of memory will occur less often?

Answer 1

Youjun, thanks for moving the question to the appropriate forum!
Michael, you are right that some resources are not cleaned up, yet I perceive the culprit to be Microsoft Reporting for Visual Studio 2010, not our own code. Yet before I asked the question here in this forum, I did some research on the Internet and found
discussions about the same problem - it is a known issue of Microsoft Reporting that it does not release the memory it occupies. I adapted some of the code I found in these discussions to our own program and inserted it. This code, however, only releases about
20 - 50 MB of memory once the report window is closed. This is unsatisfactory.
        protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
            FixToolbarTextBoxes(rptViewer);
            rptViewer.Clear();
            rptViewer.LocalReport.ReleaseSandboxAppDomain();
            rptViewer.LocalReport.Dispose();
            rptViewer.Dispose();
            GC.Collect();
            GC.WaitForPendingFinalizers();
            GC.Collect();
            MainForm mainForm = (MainForm) AllForms.GetByName("MainForm");
            Size size = mainForm.Size;
            mainForm.SetBounds(0, 0, 0, 0);
            mainForm.SetBounds(0, 0, size.Width, size.Height);
        public void FixToolbarTextBoxes(Control view)
            foreach (Control ctrl in view.Controls)
                if (ctrl.GetType().Name.IndexOf("ToolStripTextBoxControl") >= 0) ctrl.VisibleChanged += this.onVisibleChanged;
                else FixToolbarTextBoxes(ctrl);
        bool m_visible = false;
        public void onVisibleChanged(object sender, EventArgs args)
            Control ctrl = sender as Control;
            Delegate.CreateDelegate(typeof(Microsoft.Win32.UserPreferenceChangedEventHandler), 
                    sender, "OnUserPreferenceChanged");
            m_visible = ctrl.Visible;