//invoke it on the correct thread. 16 Control targetCtrl=_callbackTargetasSystem.Windows.Forms.Control; 17 if( targetCtrl!=null&&targetCtrl.InvokeRequired ) 18 { 19 //Invoke the method from the UI thread. 20 targetCtrl.Invoke( autoCallback, parameters ); 21 } 22 else 23 { 24 //Invoke...
Invoke在工作线程中返回后,它会拉出取消标志,而不考虑装箱,因为ShowProgressArgs类型是引用类型。 但是,即使它是引用类型,并且工作线程将其控制权传递给 UI 线程,也不存在争用条件的危险,因为工作线程等待 UI 线程处理完数据,然后再访问数据。 如果我们希望CalcPi函数创建ShowProgressArgs本身的实例,则此用法可以进一步...
Control targetCtrl = _callbackTarget as System.Windows.Forms.Control; if ( targetCtrl != null && targetCtrl.InvokeRequired ) { // Invoke the method from the UI thread. targetCtrl.Invoke( autoCallback, parameters ); } else { // Invoke the method from this thread. autoCallback....
// calls on a Windows Forms control. // // If the calling thread is different from the thread that // created the TextBox control, this method creates a // SetTextCallback and calls itself asynchronously using the // Invoke method. // // If the calling thread is the same as the thre...
命名空间: System.Windows.Forms 程序集: System.Windows.Forms.dll 实现一个对话框,线程中发生未经处理的异常时即会显示该对话框。 此API 支持产品基础结构,不能在代码中直接使用。C# 复制 public class ThreadExceptionDialog : System.Windows.Forms.Form...
获取一个值,该值指示调用方在对控件进行方法调用时是否必须调用 Invoke 方法,因为调用方位于创建控件所在的线程以外的线程中。 (继承自 Control) IsAccessible 获取或设置一个值,该值指示控件对辅助功能应用程序是否可见。 (继承自 Control) IsAncestorSiteInDesignMode 指示此控件的上级之一是否位于 DesignMode 中...
Description I note the thread here from 2 years ago which is locked so I couldn't reply: #2451 This is still an issue. If you attempt to use MainThread.InvokeOnMainThreadAsync() from a non-UI thread in Windows in .NET 7 it replies with a...
// Places the delegate onto the UI Thread's Dispatcherprivatevoidtimer_Elapsed(objectsender, ElapsedEventArgs e){// Place delegate on the Dispatcher.this.Dispatcher.Invoke(DispatcherPriority.Normal,newTimerDispatcherDelegate(TimerWorkItem)); }
Assembly: System.Windows.Forms.dll Executes a delegate on the thread that owns the control's underlying window handle. Overloads Expand table Invoke(Action) Executes the specified delegate on the thread that owns the control's underlying window handle. Invoke(Delegate) Executes the specified...
Does a System.Windows.Threading.Dispatcher work on the UI-thread of a WinForms application? If yes, why? It is coming from WindowsBase.dll which seems to be a WPF component. If not, how can I invoke work units back onto the UI-thread? I've found Control.BeginInvoke(), but it seems...