Question

我正在执行以下代码：

grid.Invoke(New MethodInvoker(AddressOf RefreshDataSource))

获得InvalidOperationException例外。

消息：在创建窗口句柄之前，无法在控件上调用Invoke或BeginInvoke。

堆栈追踪：

   at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous)
   at System.Windows.Forms.Control.Invoke(Delegate method, Object[] args)
   at System.Windows.Forms.Control.Invoke(Delegate method)
   at DataForm.BindData() in D:\Proj\DataForm.vb:line 380
   at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(RuntimeMethodHandle md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, IMessageSink replySink)

Answer 1

将调用从load事件更改为form.shown事件，以确保首先创建控件

Answer 2

在调用调用方法while (!this.IsHandleCreated) System.Threading.Thread.Sleep(100)

之前添加它

在创建窗口句柄之前，无法在控件上调用Invoke或BeginInvoke

3 个答案: