AccessViolationException when doing IvsWindowFrame.show()

Question

I have a desginer that i am trying to open and this designer has an embedded editor. Following is the code:

IVsUIShellOpenDocument shell = (IVsUIShellOpenDocument)DesFMPkg.Instance.GetService(typeof(IVsUIShellOpenDocument));

IOleServiceProvider sp = (IOleServiceProvider)DesFMPkg.Instance.GetService(typeof(IOleServiceProvider));

Guid editorType = GuidList.guidMultiViewEditor;

       Guid logicalView = GuidList.guidDesignView;

int hr;

       if (des.HasCodeEditorView)

       {

          IVsSolution vsSolution = (IVsSolution)DesFMPkg.Instance.GetService(typeof(SVsSolution));

          object obj;

          hr = vsSolution.GetProperty((int)__VSPROPID.VSPROPID_IsSolutionOpen, out obj);

          if (!(bool)obj)

           {

              hr = vsSolution.CreateSolution(string.Empty, string.Empty, (uint)__VSCREATESOLUTIONFLAGS.CSF_TEMPORARY);

            }

         }

this.m_designer = des;

        string caption = "";

// Find the item id assigned to this document by the project.

uint pitemid = VSConstants.VSITEMID_NIL;

string moniker = des.Moniker;

VSVirtualProject project = DesFMPkg.Instance.GetService(typeof(VirtualProject));

IVsUIHierarchy hier = project as IVsUIHierarchy;

IVsProject proj = project as IVsProject;

hr = project.AddDesigner(des, out pitemid);

ErrorHandler.ThrowOnFailure(hr);

hr = shell.OpenSpecificEditor(

(uint)0,

moniker,

ref editorType,

null,

ref logicalView,

caption,//node.Caption,

hier,

pitemid,

System.IntPtr.Zero,        

sp,

out editorFrame);

if (ErrorHandler.Succeeded(hr)) {

editorFrame.SetGuidProperty((int)__VSFPROPID.VSFPROPID_InheritKeyBindings, ref GuidList.guidCmdUI_TextEditor);

if (this.DontShowWindow == false)

rrorHandler.ThrowOnFailure(editorFrame.Show());

}

on the EditorFrame.show, i get AccessViolationException. "Attempt to read to write protected memory".
Cam someone help..

Answer 1

Hi,

Could you provide more detailes about the exception like the callstack it for example? Better yet, could you capture a minidump file for the exeption and create a Connect Bug with the appropriate repro steps?  Ideally, you can attach your project to see if we can try to repro the exception as well.

Thanks!
Dmitry.