How to Avoid 'Cross-thread operation not valid' Exceptions in Windows Forms?

Avoid cross -threaded access abnormalities: access control of different threads

In the Windows window application, cross -threading operation refers to accessing the UI control from another thread. This will lead to "invalid cross -threading operation: thread access control control from the threads of the creation control". To solve this problem, the application should only access the UI control from the creation of their threads.

Assume that the data processing task is moved to the background thread to avoid dull UI response. However, access to the UI control from the auxiliary thread may trigger the above abnormalities.

In order to solve this problem, you can use the

InvokeRequired

Properties to determine whether the access is across threads. If InvokeRequired is True , you should execute the code required on the master (UI) thread through the Invoke method. Possible solutions:

Plan 1:

If the goal is to retrieve the data used for UI, you can use the following methods:

Plan 2:

If the data processing has been completed and the results need to be displayed, you can use this method:

<code class="language-csharp">UserControl1_LoadDataMethod() {
    string name = "";
    if (textbox1.InvokeRequired) {
        textbox1.Invoke(new MethodInvoker(delegate { name = textbox1.Text; }));
    }
    if (name == "MyName") {
        // 加载“MyName”的数据
        // 为以后的绑定填充全局变量 List<string>
    }
}</code>

By observing these technologies, developers can ensure that you can access the UI control only from the main thread, thereby preventing the emergence of "invalid cross -threading operation" abnormalities and maintaining the response ability of the UI.

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