从BackgroundWorker中的剪贴板中获取数据

Question

我有一个后台工作者,在DoWork方法中我有以下内容:

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

为什么即使我知道剪贴板上的数据格式正确,它总是返回null？

Answer 1

尝试将调用放入STA线程:

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.

在具有"OnFinished"操作的方法中:

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

你会这样使用它:

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

如果要显示和隐藏窗口,请尝试以下操作:

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

用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();
});