C#线程访问其他线程 [英] c# threading access to other thread

问题描述

我有此错误:跨线程操作无效:从创建该线程的线程之外的其他线程访问控件'progressBar1'."我似乎不知道该怎么解决.

I have this error: Cross-thread operation not valid: "Control 'progressBar1' accessed from a thread other than the thread it was created on." I can't seem to figure out how to fix it.

    private void button1_Click(object sender, EventArgs e)
    {
        this.panel1.Visible = false;
        this.panel2.Visible = true;
        new Thread(ProgressBAR).Start();
    }
    private void ProgressBAR()
    {
        Thread.Sleep(5);
        for (int start = 0; start <= 100; start++)
        {
            this.progressBar1.Value = start;
            Thread.Sleep(5);
        }
    }

推荐答案

您需要使用进度条的Invoke方法在控件的主线程上执行分配:

You need to use the progress bar's Invoke method to execute the assignment on the control's primary thread:

this.progressBar1.Invoke((Action) () => this.progressBar1.Value = start, null);

仅当progressBar1.InvokeRequired为true时才需要这样做.考虑使用此扩展程序类 (无耻的自我推销，对此感到抱歉).然后您就可以忘记自己是否在正确的线程上:

You only have to do this when progressBar1.InvokeRequired is true. Consider using this extension class (shameless self-promotion, sorry about that). Then you can forget whether or not you are on the right thread:

this.progressBar1.AutoInvoke(() => this.ProgressBar1.Value = start);

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