获取数据，剪贴板一个BackgroundWorker内 [英] Getting data off the Clipboard inside a BackgroundWorker

问题描述

我有一个后台工作，并在DoWork的方法，我有以下几点：

I have a background worker and in the DoWork method I have the following:

 var clipboardData = Application.Current.Dispatcher.Invoke(new Action(() => { Clipboard.GetData(DataFormats.Serializable); }));

为什么这个总是返回null，即使我知道有数据剪贴板上以正确的格式？

Why does this always return null even though I know there is data on the clipboard in the correct format?

推荐答案

尝试把呼叫到一个STA线程：

Try putting the call into an STA thread:

object data = null;
Thread t = new Thread(() =>
{
    data = Clipboard.GetData(DataFormats.Serializable);
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
t.Join();
// 'data' should be set here.

在与OnFinished操作的方法：

Within a method with an "OnFinished" action:

void GetClipboardData(Action<Object> OnFinished)
{
    Thread t = new Thread(() =>
    {
        object data = Clipboard.GetData(DataFormats.Serializable);
        OnFinished(data);
    });
    t.SetApartmentState(ApartmentState.STA);
    t.Start();
}

您会使用这样的：

GetClipboardData((data) =>
{
    // 'data' is set to the clipboard data here.
});

如果你想显示和隐藏的窗口，试试这个：

If you want to show and hide a window, try this:

myWindow.Show();
GetClipboardData((data) =>
{
    // Do something with 'data'.
    myWindow.Close();
});

通过的ShowDialog（）：

Thread d = new Thread(() =>
{
    myWindow.ShowDialog();
});
d.SetApartmentState(ApartmentState.STA);
d.Start();
GetClipboardData((data) =>
{
    // 'data' is set to the clipboard data here.
   myWindow.Close();
});

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