如何从比它创建的线程以外的线程读取组合框？ [英] How to read combobox from a thread other than the thread it was created on?

问题描述

我试图从比它的创建上，但我得到了错误的线程以外的线程读取combobox.Text：

I am trying to read a combobox.Text from a thread other than the thread it was created on but I am getting the error:

型
未处理的异常'System.InvalidOperationException'
发生在System.Windows.Forms.dll中

An unhandled exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll

更多信息：跨线程
操作无效：控制
'levelsComboBox从比它是
创建的线程以外的
线程访问

Additional information: Cross-thread operation not valid: Control 'levelsComboBox' accessed from a thread other than the thread it was created on.

我用.Invoke之前，但只设置属性，我怎么可以用它来阅读combobox.Text？由于.Invoke返回void，我需要一个字符串。 ？还是有另一种方式做到这一点，而不调用

I have used .Invoke before but only to set properties, how can I use it to read combobox.Text? Because .Invoke returns void and I need a string. Or is there another way to do it without the Invoke?

推荐答案

您可以做到这一点是这样的：

You can do it like this:

this.Invoke((MethodInvoker)delegate()
    {
        text = combobox.Text;
    });

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