C# Add-In Form.Show or Form.ShowDialog fails to show Form in Outlook.

Question

Outlook 2010 C# add-in

I added a ribbon with a button that shows up in the Outlook main explorer window - it's group is set to show in the Send/Receive tab of the main 'menu' ribbon toolbar.

Clicking the button calls a function from the ThisAddIn.cs class like this:

private void btnSettings_Click(object sender, RibbonControlEventArgs e)
        {
            Globals.ThisAddIn.UseCustomForm();
        }

In ThisAddIn.cs

       public void UseCustomForm()
        {
            if (setup == null)
            {
                setup = new SetupForm();
            }

            setup.ShowDialog();
        }

In debug mode, the dialog displays correctly.

In release mode, nothing happens!

ANY HELP APPRECIATED

---

.Net thingy maker type guy.

Answer 1

make sure that your evebt handler is called (logging) and instead of yourform.ShowDialog, try to display MessageBox.Show - is popup shown?

Answer 2

At first it didn't do the MessageBox.Show()

But, I am doing a lot of initialization before that, so I put the MessageBox.Show() at the start of the function.

The first message shows, the second one does not.

Thus there is a bug betwixt the two..

Don't know why I didn't try that -

Thanks!!

---

.Net thingy maker type guy.

Answer 3

so, messagebox.show appears, but your form.ShowDialog does not? is your form a normal winforms form? or do you do something fancy there, like override wndproc and manually handle some messages?

Answer 4

no - I was saying that I added multiple MessageBox.Show() commands at various points in routine.

I discovered that it failed when looking for a Resource string, prior to trying to call the Form.ShowDialog();

So it didn't even get close enough to call it with the earlier error.

---

.Net thingy maker type guy.

Answer 5

so, problem solved?

Answer 6

No - now that I know the problem, I'll start a new thread - for the error:

MissingManifestResourceException: Could not find any resources appropriate for the specified culture or the nutral culture

---

.Net thingy maker type guy.