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This article mainly explains "how to realize the asynchronous call of C# multithread control progress bar". The content of the explanation in this article is simple and clear, and it is easy to learn and understand. let's study and learn how to realize the asynchronous call of C# multithread control progress bar.

Take a look at the specific steps and implementation:

In the above code, we noticed that we didn't pass any parameters to the worker thread's entry point (RunTaskThreadStart). Instead, we passed parameters to the worker thread by declaring the field _ seconds of a form class. It is also very painful not to pass parameters directly to the worker thread in some application.

The necessity of C# multithreading to control asynchronous invocation of the progress bar: how to improve it? We can use delegates to make asynchronous calls. Delegates support passing parameters. This eliminates the problem we just had, allowing us to eliminate additional field declarations and additional worker thread functions.

If you are not familiar with a delegate, you can simply understand it as a safe function pointer. The delegate asynchronous call is used, and the code snippet is as follows:

/ the delegate declaration delegate void RunTaskDelegate (int seconds) for executing the task; / / solving the problem of passing parameters by creating a delegate private void _ btnRun_Click (object sender, System.EventArgs e) {/ / C # Asynchronous invocation of the multithreaded control progress bar RunTaskDelegate runTask = new RunTaskDelegate (RunTask); / / delegation synchronous invocation mode runTask (Convert.ToInt16 (_ txtSecond.Value)) } / / solve the problem of passing parameters by creating a delegate, / / eliminate the blocking problem of the user interface thread through the asynchronous call of the delegate private void _ btnRun_Click (object sender, System.EventArgs e) {RunTaskDelegate runTask = new RunTaskDelegate (RunTask); / / delegate asynchronous invocation mode, C# multithread controls the asynchronous invocation of the progress bar runTask.BeginInvoke (Convert.ToInt16 (_ txtSecond.Value), null, null) } Thank you for your reading. The above is the content of "how to realize the asynchronous call of C# multithreaded control progress bar". After the study of this article, I believe you have a deeper understanding of how to realize the asynchronous call of C# multithreaded control progress bar, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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