WPF知识点全攻略17- 开发小技巧

1、找回Main入口

    /// <summary>
    /// App.xaml 的交互逻辑
    /// </summary>
    public partial class App : Application
    {
        [STAThread]
        public static void Main()
        {
            App app = new App();
            app.InitializeComponent();
            app.Run();
        }
    }

 

2、全局异常捕获

    /// <summary>
    /// App.xaml 的交互逻辑
    /// </summary>
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        { 
            //UI线程未捕获异常处理事件（UI主线程）
            this.DispatcherUnhandledException += App_DispatcherUnhandledException;
            //非UI线程未捕获异常处理事件(例如自己创建的一个子线程)
            AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
            //Task线程内未捕获异常处理事件
            TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
            
            base.OnStartup(e);

        }

        #region 全局日志处理
        /// <summary>
        /// Task线程异常
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void TaskScheduler_UnobservedTaskException(object sender, UnobservedTaskExceptionEventArgs e)
        {
            Exception ex = e.Exception as Exception;
            OnExceptionHandler("Task异常:", ex);
        }
        /// <summary>
        /// 主线程异常
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void App_DispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
        {
            Exception ex = e.Exception as Exception;
            OnExceptionHandler("系统异常", ex);
            e.Handled = true;
        }
        /// <summary>
        /// 子线程异常
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            Exception ex = e.ExceptionObject as Exception;
            OnExceptionHandler("非UI线程异常:", ex);
        }
        /// <summary>
        /// 异常处理 封装写日志
        /// </summary>
        /// <param name="ex"></param>
        private void OnExceptionHandler(string msg, Exception ex)
        {
            //GalaSoft.MvvmLight.Messaging.Messenger.Default.Send<bool>(false, "ShowLoading");

            var errorMsg = msg;
            if (ex != null)
            {
                if (ex.InnerException != null)
                {
                    errorMsg += String.Format("【InnerException】{0}\n{1}\n", ex.InnerException.Message, ex.InnerException.StackTrace);
                }
                errorMsg += String.Format("{0}\n{1}", ex.Message, ex.StackTrace);
            }
            Log4Helper.Error(errorMsg);//自己封装的日志管理
        }

        #endregion
    }

 

3、窗体拖动（可指定标题栏等实现）

public MainWindow()
{
    InitializeComponent(); 
    this.Loaded += (r, s) =>
    {
        this.MouseDown += (x, y) =>
        {
            if (y.LeftButton == MouseButtonState.Pressed)
            {
                this.DragMove();
            }
        };
    }; 
} 

 

4、强制退出所有线程（后台线程较多且没有控制好注销时使用）

public MainWindow()
{
    InitializeComponent();   
    this.Closed += (r, s) =>
    {
        Environment.Exit(0);
    };
} 

 

4、WPF中使用WindowsFormsHost嵌套嵌入WinForms控件时，需要释放内存占用

WindowsFormsHost.Child = null;

 

WPF知识点全攻略目录：https://www.cnblogs.com/kuangxiangnice/p/11040070.html