How to show error message in Try Catch statement

Question

It seems you can not use Await to show error message in Try-Catch Statement:


MessageDialog mError = new MessageDialog("Error: You entered: " +  txtNbr.text , "Not a Number");
await mError.ShowAsync();

How to show error message in Try-Catch Block ??

Thanks

------- Update
I got error for this " Unspecific Error "


public async void Populate()
        {

            try
            {

                string PrintText = "";

                //--- Create a Run of plain text and some bold text.
                Windows.UI.Xaml.Documents.Run myRun1 = new Run();
                myRun1.Text = "testing testing testing  \n  1213131313 \n";
                P1.Inlines.Add(myRun1);
                textContent.Blocks.Add(P1);

            }
            catch (Exception ex)
            {

                ErrorMessage = ex.Message;

            }

            if (ErrorMessage != "")
            {
                MessageDialog mError = new MessageDialog(ErrorMessage, "Error");
                await mError.ShowAsync();
                ErrorMessage = "";
            } 

        }

dup of http://stackoverflow.com/questions/17817216/what-is-the-proper-way-to-show-a-winrt-messagedialog-due-to-a-caught-exception — Farhan Ghumra, Sep 10 '13 at 05:33
At this line : textContent.Blocks.Add(P1); Where textContent is the RichTextBlock. — MilkBottle, Sep 10 '13 at 06:54
P1 is the Paragraph for RichTextBlock which is on the Page. Without Try-Catch, there is no error. With Try-Catch, there is err msg BUT still show the result. What could be the problem? — MilkBottle, Sep 10 '13 at 09:52
The issue you're discussing now is different than the question you originally posed. Consider posting that issue as a separate question. — Nathan Kuchta, Sep 11 '13 at 22:56

score 0 · Accepted Answer · answered Sep 10 '13 at 04:20

0

From MSDN: "An await expression can't occur in a catch block or a finally block."

You could restructure your code to set a flag in the catch block and show the message dialog outside of the catch block if the flag is set.

answered Sep 10 '13 at 04:20

Nathan Kuchta

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Do I need to use async keyword for the method base on your suggestion? – MilkBottle Sep 10 '13 at 05:00

How to show error message in Try Catch statement

1 Answers1