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Intro Programming What is a loop? Which language is best for beginners? What is "object oreinted?" All those types of questions and more are welcome here.
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Old April 21st, 2014, 03:11 AM
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Default Not sure if I am in the right place.

I need some help with my code. I need a messagebox to show and I know the code is right, but it only works for VB not for Visual Web Developer(2010). Could someone please look at my code to see if I have done something wrong. I am using Visual Web Developer 2012, Thanks

Code:
             'Calculate and display the total charges.
            decTotal = decSubtotal + decTax     '<---Calculating(adding) the Total Charges
            lblTotal.Text = decTotal.ToString("c")  '<---Displaying decTotal in lblTotal.

            'Change and display the total charges.
            lblTotal.BackColor = Drawing.Color.Blue
            lblTotal.ForeColor = Drawing.Color.White

        Catch ex As Exception
            'Error message
            MessageBox.Show("All input must be vaild numberic values.")
        End Try
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Old April 24th, 2014, 01:03 AM
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Default

MessageBox is a windows form control. Visual web developer is for web forms. Rendering happens on the client machine; so the message box does not work. Looking at your snippet you are wanting to report some error to back to the users browser. What i typically do for this is to have a custom validator that sits silently on the page and set it up so it does not have text and its display is none. Along with this validator you add a validation summary to the page. To activate the error reporting in your try catch block set the IsValid property to false and the ErrorMessage property to your exception message on the custom validator.

Sample code to set error message on screen
Code:
catch ex as Exception
  custvalException.IsValid = false
  custValException.ErrorMessage = "some message" 'ErrorMessage displays in validation summary
End try

Last edited by mmorgan30; April 24th, 2014 at 01:12 AM..
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