在ClipBoard.SetText（）函数中无法处理ThreadStateException [英] ThreadStateException can't handeled in ClipBoard.SetText() Function

问题描述

HI。

当我点击按钮并运行以下代码时，我无法解决异常。

ThreadStateException未被用户代码处理

在进行OLE调用之前，必须将当前线程设置为单线程单元（STA）模式。确保主函数上标有STAThreadAttribute。



任何人都有这个想法吗？

HI.
When I click the button and run the following code I am unable to resolve the exception.
ThreadStateException was unhandled by user code
"Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it."

Any one has the idea??

private void button1_Click(object sender, EventArgs e)
        {
            new Task(myFunction).Start();
        }
        private void myFunction()
        {
            Clipboard.SetText("this text will be copied to clipboard");
        }

推荐答案

private void button1_Click(object sender, EventArgs e)
        {
            new Task(myFunction).Start();
        }
private void myFunction()
        {
           RunAsSTAThread(
            () =>
            {
                ClClipboard.SetText("this text will be copied to clipboard");
            });
            
        }

static void RunAsSTAThread(Action goForIt)
        {
            AutoResetEvent @event = new AutoResetEvent(false);
            Thread thread = new Thread(
                () =>
                {
                    goForIt();
                    @event.Set();
                });
            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();
            @event.WaitOne();
        }

而不是设置单独线程的公寓状态（这在某些情况下是完全合理的，因为您可能需要使用一个公寓在一个线程中（例如，主要一个）和在某个其他线程中不同的状态，使用某些需要特定公寓状态的API），在您的情况下看起来不像您需要它。



相反，你可以在你有入口点方法的地方为主线程设置STA线程：

Instead of setting the apartment state of the separate thread (which is some cases makes perfect sense, because you may need to use one apartment state in one thread (say, main one) and different in some other thread, to use some API requiring certain apartment state), it doesn't look like you need it in your case.

Instead, you could simply set STA thread for your main thread at the point where you have your entry point method:

using System;

//...

[STAThread]
static void Main( /* ... */  ) {
    //...
}

这种方式可能看起来不够通用。它不是。它适合大多数情况。让我们看看：控制台应用程序可以以 STAThread 或 MTAThread 开头，与系统相同.Windows.Forms ，但WPF需要 [STAThread] 。换句话说，在大多数情况下， STAThread 不会出错。只有在某些特殊情况下你才需要两者。

-SA

This way may look not universal enough. It is not. It's just fit most of the cases. Let's see: a console application can start with either STAThread or MTAThread, same thing with System.Windows.Forms, but WPF requires [STAThread]. In other words, in most cases, you cannot go wrong with STAThread. And only in some special cases you many need both.

—SA

使用剪贴板作为在下面：

use clipboard as in the following:

private void button1_Click(object sender, EventArgs e)
        {
            // new Task(myFunction).Start();
            try
            {
                myFunction();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

并在这里查看线程机制。 http://msdn.microsoft.com/en- us / library / windows / desktop / ms693344％28v = vs.85％29.aspx [ ^ ]

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