How to intercept message dialogs and add custom handling.


Image_6671_1733826505658

For message dialogs like the one shown in the image, I want to capture them and selectively display prompts based on their type and content.



4 Replies

MS Malini Selvarasu Syncfusion Team December 11, 2024 02:06 PM UTC

Hi crosslife,
Based on the information provided, we understand that you need to capture the message box and customize its content and types. Unfortunately, we cannot capture the message box at the application level. However, we can capture some unhandled exceptions and display the exception messages in the message box.
To handle exceptions, you can catch all exceptions thrown by the spreadsheet using the method outlined below.
This can be achieved by using the DispatcherUnhandledException event in the App.xaml.cs file. This event is triggered whenever an exception occurs on the UI thread, and it sets up a global exception handler for unhandled exceptions in a WPF application.
 Code Snippet:
public App()
 {
     DispatcherUnhandledException += App_DispatcherUnhandledException;
 }
 
private void App_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
 {
     // Check if the exception originates from SfSpreadsheet
     if (e.Exception.Source == "Syncfusion.SfSpreadsheet.WPF")
     {
         // Log the exception or display an error message
         MessageBox.Show($"An unexpected error occurred in SfSpreadsheet: {e.Exception.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
 
         // Optionally, prevent the application from shutting down
         e.Handled = true;
     }
     else
     {
         // Let other exceptions propagate normally
         e.Handled = false;
     }
 }
Thank you for your understanding.

Regards,
Malini Selvarasu


CR crosslife December 12, 2024 03:43 AM UTC

This exception handling method has been added, but the popup is actually a regular MessageBox triggered by SfSpreadsheet, not an exception, so it cannot be caught using this approach.



CR crosslife December 12, 2024 03:46 AM UTC


Below is my catching method, which can indeed catch some exceptions, but it cannot catch this kind of popup dialog.

Image_4835_1733975102187



MS Malini Selvarasu Syncfusion Team December 12, 2024 02:44 PM UTC

Hi crosslife,

As previously mentioned, the exception is captured and handled internally, with a message box displayed within the application. As a result, it is not possible to manage the exception or access the message box at the application level. If you encounter any issues, please feel free to reach out to us. We are happy to assist you. Thank you for your understanding.
Regards,
Malini Selvarasu

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