Security

Re: Operation could destabilize the runtime

sschack — Tue, 24 Oct 2006 00:21:37 GMT

I manually converted this into C#. The C# version runs without any errors, which leads me to think that the Delphi compiler is emitting IL that the .NET 2.0 Framework doesn't like. Just for reference I have pasted the converted version below:

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        FillGrid();
    }

    private void FillGrid()
    {
        DataTable dt = new DataTable();
        DataRow dr;
        double r;

        dt.Columns.Add(new DataColumn("Column1"));
        dt.Columns.Add(new DataColumn("Column2"));
        dt.Columns.Add(new DataColumn("Column3"));

        for (int i =0; i<10; i++)
        {
            dr = dt.NewRow();
            dr[0] = i.ToString();
            dr[1] = "Item " + i.ToString();
            r = 1.23 * (i + 1);
            dr[2] =r.ToString(); //shortcut - this doesn't preserve the original formatting
            dt.Rows.Add(dr);
        }

        DataView dv = new DataView(dt);

        dataGrid1.DataSource =dv;
        dataGrid1.DataBind();
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        int i;
        System.Web.UI.HtmlTextWriter oHtmlTextWriter;
        System.IO.StringWriter oStringWriter;

        Response.Clear();
        Response.Buffer = true;
        Response.ContentType ="'application/vnd.ms-excel";
        Response.AddHeader("Content-Disposition", "attachment; filename=test.xls");
        Response.ContentEncoding = System.Text.Encoding.UTF7;
        Response.Charset = "";

oStringWriter = new System.IO.StringWriter();
oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);

        dataGrid1.RenderControl(oHtmlTextWriter);
        Response.Write(oStringWriter.ToString());
        Response.End();

}
}

Re: Operation could destabilize the runtime

pproducts — Sat, 21 Oct 2006 09:29:50 GMT

Thank you for your reply, I hope you can help.

Here is my sample code. The method dataGrid1.RenderControl(oHtmlTextWriter) is working fine under asp.net1.1 but the 'famous' error occurs under asp.net 2.0. Thank you very much in advance...

procedure tTest.Page_Load(sender: System.Object; e: System.EventArgs);
begin
fillgrid;
end;

procedure tTest.FillGrid;
var
dt : datatable;
dr : datarow;
i : integer;
dc : datacolumn;
s : string;
r : double;

begin
   dt:= datatable.Create;
   dc:= datacolumn.Create('Column1');
   dt.Columns.Add(dc);
   dc:= datacolumn.Create('Column2');
   dt.Columns.Add(dc);
   dc:= datacolumn.Create('Column3');
   dt.Columns.Add(dc);
   for i:=1 to 10 do
   begin
     dr:=dt.NewRow;
     dr[0] := i.ToString;
     dr[1] := 'Item ' + i.ToString();
     r:=1.23 * (i + 1);
     str(r:0:2,s);
     dr[2]:=s;
     dt.Rows.add(dr)
   end;
   dv := dataview.Create(dt);
   dataGrid1.DataSource:=dv;
   dataGrid1.DataBind;
end;

procedure TTest.Button1_Click(sender: System.Object; e: System.EventArgs);
var
i : integer;
oHtmlTextWriter: System.Web.UI.HtmlTextWriter;
oStringWriter : System.IO.StringWriter;
begin
Response.Clear;
Response.Buffer:=true;
Response.ContentType:= 'application/vnd.ms-excel';
Response.AddHeader('Content-Disposition', 'attachment; filename=test.xls');
Response.ContentEncoding:= System.Text.Encoding.UTF7;
Response.Charset := '';
oStringWriter:=System.IO.StringWriter.Create;
oHtmlTextWriter:=System.Web.UI.HtmlTextWriter.Create(oStringWriter);

dataGrid1.RenderControl(oHtmlTextWriter);
Response.Write(oStringWriter.ToString());
Response.&End;
end;

Re: Operation could destabilize the runtime

sschack — Mon, 16 Oct 2006 18:31:19 GMT

If you have a sample page with code that reproduces the problem, go ahead and post the sample here. We can take a look at it.

Re: Operation could destabilize the runtime

pproducts — Sun, 15 Oct 2006 13:15:00 GMT

I have the same error when I want to Render a dataGrid.

dataGrid.RenderControl(oHtmlTextWriter);

For the problems mentioned in this thread, a tric did the job. I cannot find the tric for the dataGrid.

Thanks in advance... I have searched and struggled for days now, but nothing helps... do I have to wait for Delphi 200x, which fully support ASP.NET 2.0, or is there a tric for a dataGrid.Render...

Regards,

Peter

Re: Operation could destabilize the runtime

kantreddi — Wed, 07 Jun 2006 20:45:30 GMT

For the last 3 hours I am struggling to solve this "Operation could destabilize the runtime" error. This I encountered when I switched over from Asp.net 1.1 to Asp.net 2.0. After reading the post, I checked my code and changed the SWITCH statement to if else if and now things are running fine.

Thanks a lot to all.

Re: Operation could destabilize the runtime

rodneyjoyce — Sat, 15 Apr 2006 09:02:27 GMT

Hmm - interesting - thanks for the help - hopefully this post will help some other people who run into this obscure problem!

Re: Operation could destabilize the runtime

sschack — Fri, 14 Apr 2006 22:15:21 GMT

Turns out there was a low-level change to how the 2.0 Framework verifies code for a specific type of IL. And in some cases the older 1.1 compilers emit IL that is now considered unverifiable in 2.0. This was the response from the CLR gurus:

The Everett compiler emits the following code for the original 1.1 call:

IL_0011: ldloc.0
IL_0012: call instance void [System.Web]System.Web.UI.Control::RenderControl(class [System.Web]System.Web.UI.HtmlTextWriter)

However RenderControl is a virtual method and due to the stricter requirements for ASP.NET 2.0, this is not considered a safe way to call a virtual method in Whidbey.

The code change that you made gets emitted as:

IL_0013: ldloc.0
IL_0014: callvirt instance void [System.Web]System.Web.UI.Control::RenderControl(class [System.Web]System.Web.UI.HtmlTextWriter)

From a verification stanpoint, "callvirt" is safe - but "call" isn't.

Re: Operation could destabilize the runtime

sschack — Fri, 14 Apr 2006 19:03:49 GMT

Beats me why that fixes it! I'll ask some CLR folks internally if they have any ideas on why rearranging the code in this case fixes the problem.

Re: Operation could destabilize the runtime

rodneyjoyce — Fri, 14 Apr 2006 18:46:43 GMT

Interesting:

LiteralControl spacer = new LiteralControl(" ");
spacer.RenderControl(writer);

seems to work... so it's the

new LiteralControl(" ").RenderControl(writer);

that breaks it!?

Re: Operation could destabilize the runtime

rodneyjoyce — Fri, 14 Apr 2006 18:16:57 GMT

Yes, it's a 1.1 control - if I comment it out it works fine... very strange - I will try your suggestion and get back to you - thanks...

Re: Operation could destabilize the runtime

sschack — Thu, 13 Apr 2006 20:58:54 GMT

Is this custom control an ASP.NET 1.1 control? Just wondering because the line of code above works fine in a page on ASP.NET 2.0 running under Medium trust.

If you remove the line of code you have above, does the custom control work then?

I don't know why the line of code above would cause the problem - I don't understand the ins and outs of what makes IL verifiable versus not verifiable. As a long shot - what happens if you first construct the LiteralControl on one line - and then on the next line call RenderControl(..)?

Re: Operation could destabilize the runtime

rodneyjoyce — Thu, 13 Apr 2006 13:48:22 GMT

Very odd - I've narrowed it down to creating and rendering a LiteralControl in the render method of the custom control - this line:

new LiteralControl(" ").RenderControl(writer);

I don't know enough to know why - is that what you would expect?

Re: Operation could destabilize the runtime

rodneyjoyce — Thu, 13 Apr 2006 12:20:10 GMT

*sigh* - that didn't work Stefan ;)

I tried a big list of "if - else if " stamements with no joy, and then straight "if statements", but no joy... (still same error)

Any other ideas please?

            if (listType == ListType.User)
            {
                UserController userController = new UserController();
                listDataSource = userController.GetUsers(Utilities.GetModuleUserControl(this).PortalId, true, true);
                dataValueField = "UserID";
                dataTextField = "FullName";
            }
            if (listType == ListType.ApprovalStatus)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_ApprovalStatus");
            }
            if (listType == ListType.CensorStatus)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_Censorship");
            }
            if (listType == ListType.GeneralStatus)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_GeneralStatus");
            }
            if (listType == ListType.EventCategory)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventCategory");
            }
            if (listType == ListType.EventDressCode)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventDressCode");
            }
            if (listType == ListType.EventDuration)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventDuration");
            }
            if (listType == ListType.EventStatus)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventStatus");
            }
            if (listType == ListType.EventType)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventType");
            }

            if (listType == ListType.EventRSVP)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventRSVP");
            }
            if (listType == ListType.Title)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_Title");
            }
            if (listType == ListType.EventInviteType)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventInviteType");
            }
            if (listType == ListType.QuoteCategory)
            {
                listDataSource = listController.GetListEntryInfoCollection("SmartThinker_QuoteCategory");
            }

Re: Operation could destabilize the runtime

sschack — Thu, 13 Apr 2006 01:37:27 GMT

Heh - looks exactly like what was in our 1.1 assembly - a big switch statement. Our hack was to change the 1.1 code over to a bunch of if-then statements. Then we recompiled with VS2003, and were able to successfully use the updated assembly in a partial trust ASP.NET 2.0 app.

Re: Operation could destabilize the runtime

rodneyjoyce — Thu, 13 Apr 2006 00:03:01 GMT

Thanks for the reply Stefan - I think you're on to something here. The subcontrol has a large switch statement:

            switch (listType)
            {
                case ListType.User:
                    UserController userController = new UserController();
                    listDataSource = userController.GetUsers(Utilities.GetModuleUserControl(this).PortalId, true, true);
                    dataValueField = "UserID";
                    dataTextField = "FullName";
                    break;
                case ListType.ApprovalStatus:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_ApprovalStatus");
                    break;
                case ListType.CensorStatus:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_Censorship");
                    break;
                case ListType.GeneralStatus:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_GeneralStatus");
                    break;
                case ListType.EventCategory:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventCategory");
                    break;
                case ListType.EventDressCode:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventDressCode");
                    break;
                case ListType.EventDuration:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventDuration");
                    break;
                case ListType.EventStatus:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventStatus");
                    break;
                case ListType.EventType:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventType");
                    break;
                case ListType.EventRSVP:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventRSVP");
                    break;
                case ListType.Title:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_Title");
                    break;
                case ListType.EventInviteType:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_EventInviteType");
                    break;
                case ListType.QuoteCategory:
                    listDataSource = listController.GetListEntryInfoCollection("SmartThinker_QuoteCategory");
                    break;
            }

it's late, so I'll only be able to test this in a while, but I'll follow your advice.