128 lines
3.8 KiB
C#
128 lines
3.8 KiB
C#
using System.Diagnostics;
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using System.IO;
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using System.Windows;
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using System.Windows.Threading;
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namespace WPF_25_TreeView;
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/// <summary>
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/// Interaction logic for App.xaml
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/// </summary>
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public partial class App
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{
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protected override void OnStartup(StartupEventArgs e)
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{
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// 全局未处理异常捕获（UI线程和非UI线程）
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AppDomain.CurrentDomain.UnhandledException += OnUnhandledException;
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// 专为WPF UI线程异常捕获（例如按钮点击事件中的异常）
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DispatcherUnhandledException += OnDispatcherUnhandledException;
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// 异步任务异常捕获
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TaskScheduler.UnobservedTaskException += OnUnobservedTaskException;
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base.OnStartup(e);
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}
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/// <summary>
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/// 处理非UI线程异常
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/// </summary>
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private static void OnUnhandledException(object sender, UnhandledExceptionEventArgs e)
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{
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if (e.ExceptionObject is not Exception exception) return;
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LogException(exception, "全局异常");
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if (e.IsTerminating) // 如果是致命异常
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{
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ShowFatalError(exception);
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Environment.Exit(1); // 确保应用退出
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}
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else
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{
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ShowUserFriendlyError(exception);
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}
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}
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/// <summary>
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/// 处理UI线程异常（可阻止应用崩溃）
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/// </summary>
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private static void OnDispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
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{
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LogException(e.Exception, "UI线程异常");
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ShowUserFriendlyError(e.Exception);
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// 标记为已处理，阻止应用崩溃（谨慎使用！）
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e.Handled = true;
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}
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/// <summary>
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/// 处理异步任务异常
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/// </summary>
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private static void OnUnobservedTaskException(object? sender, UnobservedTaskExceptionEventArgs e)
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{
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LogException(e.Exception, "异步任务异常");
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e.SetObserved(); // 标记为已处理，避免进程崩溃
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}
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/// <summary>
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/// 记录异常到日志文件
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/// </summary>
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private static void LogException(Exception ex, string category)
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{
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var logMessage = $"[{DateTime.Now}] [{category}]\n{ex}\n\n";
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try
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{
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File.AppendAllText("app_errors.log", logMessage);
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Debug.WriteLine(logMessage); // 输出到调试窗口
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}
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catch
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{
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/* 防止日志记录本身抛出异常 */
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}
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}
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/// <summary>
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/// 显示用户友好的错误提示
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/// </summary>
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private static void ShowUserFriendlyError(Exception ex)
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{
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var message = ex switch
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{
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UnauthorizedAccessException => $"权限不足: {ex.Message}\n请检查文件/文件夹权限。",
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FileNotFoundException => $"文件未找到: {ex.Message}",
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IOException => $"文件读写错误: {ex.Message}",
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_ => $"发生错误: {(ex.InnerException ?? ex).Message}"
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};
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MessageBox.Show(
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message,
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"错误",
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MessageBoxButton.OK,
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MessageBoxImage.Error
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);
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}
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/// <summary>
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/// 显示致命错误并退出
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/// </summary>
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private static void ShowFatalError(Exception ex)
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{
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MessageBox.Show(
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$"程序即将关闭，原因:\n{ex.Message}\n\n详细信息已记录到日志。",
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"致命错误",
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MessageBoxButton.OK,
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MessageBoxImage.Stop
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);
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}
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protected override void OnExit(ExitEventArgs e)
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{
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// 清理事件订阅
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AppDomain.CurrentDomain.UnhandledException -= OnUnhandledException;
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DispatcherUnhandledException -= OnDispatcherUnhandledException;
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TaskScheduler.UnobservedTaskException -= OnUnobservedTaskException;
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base.OnExit(e);
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}
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} |