Controls created on a thread cannot be the parent of the control created on another thread (transfer)

Exceptions that may occur when solving multi-thread operation controls: "The control created on a thread cannot be the parent of the control created on another thread."

Posted on 2005-10-25 14:47

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Some Summary About "Multi-Thread Windows Form Control Example" in .NET Framework:

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"Windows Form" uses a single-threaded unit (STA) model because the "Windows Form" is based on the Win32 window, while the Win32 window is in essentially unit thread. The STA model means that the window can be created on any thread, but once the window cannot switch the thread, and all of its function calls must occur on its creation thread. In addition to the Windows Form, the class in the .NET Framework uses the free thread model. For information on threads in .NET Framework, see Thread Processing.

The STA model requires any way to be on the control from the controlled non-creating threads must be sealed (on it) the creation thread of the control. Base class

CONTROL

Some methods are provided for this purpose (

Invoke

,

BeginInvoke

with

Endinvoke

). Invoke generation synchronization method call; BeGinInvoke generates asynchronous method calls.

If you use multi-threads for the task of the resource in the control, the user interface can perform a large amount of occupied resources on the background thread while maintaining a response. -------------------------------------------------- ---- The following directly gives my instance program, a button is the data binding of the DataGrid control directly to the DataGrid control; the other button will be successfully executed through the invoke call.

Using

System;

Using

System.data;

Using

System.Threading;

Using

System.drawing;

Using

System.collections;

Using

System.componentmodel;

Using

System.windows.forms;

Namespace

MultithreadOperateControls

{/ ** ////