C# Inserting a new Requirement in HP Quality Center - AccessViolationException

Question

Trying to create a prototype application that will post a new Requirement to HPQC 11.

I've managed to get a solid connection but when I attempt to add the blank requirement I get an AccessViolationException.

TDConnectionClass td = HPQC_Connect(); //Open a connection
ReqFactory myReqFactory = (ReqFactory)td.ReqFactory; //Start up the Requirments Factory.
Req myReq = (Req)myReqFactory.AddItem(DBNull.Value); //Create a new blank requirement (AccessViolationException)
myReq.Name = "New Requirement"; //Populate Name
myReq.TypeId = "1"; // Populate Type: 0=Business, 1=Folder, 2=Functional, 3=Group, 4=Testing
myReq.ParentId = 0; // Populate Parent ID
myReq.Post(); // Submit

Any ideas? I'm fairly new to C# and coding in general, so it's probably best to assume I know nothing.

Answer 1

After some significant working through the isse the following code works correctly:

private void HPQC_Req_Create_Click()
    {
        TDConnection td = null;
        try
        {
            td = new TDConnection();
            td.InitConnectionEx("server");
            td.Login(HPQCUIDTextbox.Text.ToString(), HPQCPassTextbox.Text.ToString());
            Console.WriteLine(HPQCPassTextbox.Text.ToString());
            td.Connect("DEFAULT", "Test_Automation_Playground");

            bool check = td.LoggedIn;
            if (check == true)
            {
                Console.WriteLine("Connected.");
                HPQCStatus.Text = "Connected.";
            }

            ReqFactory myReqFactory = (ReqFactory)td.ReqFactory;
            Req myReq = (Req)myReqFactory.AddItem(-1); //Error Here
            myReq.Name = "New Requirement 1";
            myReq.TypeId = "1"; // 0=Business, 1=Folder, 2=Functional, 3=group, 4=testing 
            myReq.ParentId = 0;
            myReq.Post();

            Console.WriteLine("Requirement Created.");
            HPQCStatus.Text = "Requirement Created.";

            try
            {
                td.Logout();
                td.Disconnect();
                td = null;
            }
            catch
            { }
        }
        catch (Exception ex)
        {
            Console.WriteLine("[Error] " + ex);
            try
            {
                td.Logout();
                td.Disconnect();
                td = null;
            }
            catch
            { }
        }

This code requires that the Server be patched to QC 11 Patch 9 (Build 11.0.0.7274) in order to work. Previous versions cause errors, most notably the error in the question.