How Can I Implement Global Exception Handling in a WPF Application?

Catch exceptions globally in WPF application

Exceptions that occur during runtime in WPF applications can be globally captured and logged for further analysis. This allows the application to continue running after handling the exception condition, similar to VB's "On Error Resume Next" behavior.

Implementation method

To implement global exception handling in C#, you can use the Application.DispatcherUnhandledException event. This event is raised whenever an unhandled exception occurs in the application.

Handle App.xaml.cs events in DispatcherUnhandledException files:

using System.Windows;

namespace YourApplication
{
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);
            this.DispatcherUnhandledException += OnDispatcherUnhandledException;
        }

        private void OnDispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
        {
            // 记录异常信息
            LogException(e.Exception);

            // 通过将Handled设置为true来继续程序执行
            e.Handled = true;
        }

        private void LogException(Exception exception)
        {
            // 在此处实现自定义日志记录逻辑，将异常信息保存到文件或数据库中。
        }
    }
}

Notes

While this approach enables the application to recover from exceptions, please note that certain exceptions will not allow the application to recover successfully, such as:

• Stack Overflow
• Memory exhausted
• Network connection lost during database operation

Carefully consider the nature of exceptions that may occur in your application and determine whether global handling is appropriate. For mission-critical applications, stricter error handling mechanisms should be adopted.

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