wpf工作状态

作者: 易米烊光
发布时间: 2025-03-18 08:45:55 (21天前)
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⑩Ⅵ嵗Ｄ夨憶 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”> <P> 一种简单的方法是使用忙碌指示器 <a href="http://wpftoolkit.codeplex.com/releases/view/58768" rel="nofollow"> 扩展的WPF工具包 </A> ： </p> <P> 下载二进制文件并将项目引用添加到WPFToolkit.Extended.dll。 </p> <P> 接下来在“主窗口”中添加以下命名空间： </p> <pre> <code> xmlns:ext="clr-namespace:Microsoft.Windows.Controls;assembly=WPFToolkit.Extended" </code> </pre> <P> 然后在视图中添加忙指示符（放置它以便在显示时占用整个屏幕）这里我的主窗口有两行，我希望控件跨越两行。控件的IsBusy属性绑定到视图数据上下文中的bool属性。 </p> <pre> <code> <ext:BusyIndicator Grid.RowSpan="2" x:Name="busyIndicator" IsBusy="{Binding IsBusy}" /> </code> </pre> <P> 应该在另一个线程中处理持久计算，以便它不会阻止用户界面。对于线程，您可以使用 <a href="http://msdn.microsoft.com/en-us/library/system.componentmodel.backgroundworker.aspx" rel="nofollow"> BackgroundWorker类 </A> 。 </p> </DIV>

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梦中会飞的鱼 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”> <P> 您应该在单独的线程中执行长时间运行的任务以避免UI阻塞。这是你可以实现的一种方式： </p> <P> 定义后台线程如下： </p> <pre> <code> //Delegate that you could pass into the worker thread public delegate void ProgressMonitor(string s); //Call this to start background work void StartLongRunningWork(ProgressMonitor mon) { using (BackgroundWorker bgw = new BackgroundWorker()) { bgw.DoWork += WorkerThread; bgw.RunWorkerCompleted += WorkerThreadCompleted; bgw.RunWorkerAsync(mon); } } void WorkerThread(object sender, DoWorkEventArgs e) { ProgressMonitor pm = (ProgressMonitor)e.Argument; WorkerActual(pm, <any other parameters>); } void WorkerActual(ProgressMonitor pm,<any other parameters>) { ... pm("Doing x"); Do long running task pm("Doing y"); ... } //This function is called in case of Exception, Cancellation or successful completion //of the background worker. Handle each event appropriately void WorkerThreadCompleted(object sender, RunWorkerCompletedEventArgs e) { if (e.Error != null) { //Long running task threw an exception } else if (e.Cancelled) { //Long running task was cancelled } else { //Long running task was successfuly completed } } </code> </pre> <P> 并将其命名如下： </p> <pre> <code> private void UpDateProgressLabel(string s) { this.Dispatcher.BeginInvoke((Action)delegate { NotificationLabel.Content = s; }); } private void Button_Click(object sender, RoutedEventArgs e) { StartLongRunningWork(UpDateProgressLabel); } </code> </pre> </DIV>

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