WPF控件不支持控件. invokeRequired属性 [英] WPF Controls does not supported Control. invokeRequired Property

问题描述

伙计们，在Windows应用程序中，我可以使用if(AnyControl.invokeRequired)..做点事
但是在WPF中找不到此属性
任何人都可以帮助我将此代码转换为WPF代码
代码是:

hi guys , in Windows application and i can use if(AnyControl.invokeRequired) .. do some thing
but here in WPF can not found this property
any one help my to convert this Code into WPF Code
the code is :

void buffer_TimedOut(String value)
{
    if (this.InvokeRequired)
    {
        this.BeginInvoke(new Action<String>(buffer_TimedOut), new Object[] { value });
    }
    else
    {
        if (value.Length == 13)
        {
    // Barcode!
        }
        else
        {
            // Typed text...append to Textbox f.e.
        }
    }

任何人都可以帮助我做到这一点...谢谢

any one help me in doing that ... thanks

推荐答案

对于大多数应用程序，即使在System.Windows.Forms.Control中，您也不需要它，因为此属性将始终如果使用控件从UI线程以外的任何线程中调用，则返回true；在大多数设计中，您都知道这一点；此属性仅在可以从UI线程或非UI线程调用的某些方法中使用，这种方法相对较少.

对于WPF，您需要使用类Dispatcher:
http://msdn.microsoft.com/en-us/library/system. windows.threading.dispatcher.aspx [ ^ ].

请参阅这篇文章，其中有足够的介绍:
http://msdn.microsoft.com/en-us/magazine/cc163328.aspx [ ^ ].

—SA

For most applications, you don''t need it even in System.Windows.Forms.Control, because this property will always return true if called from any thread other then the UI thread using a control, and in most designs you know that; this property is only used in some method which can be called from either UI or non-UI thread, which is relatively rare.

With WPF, you need to use the class Dispatcher:
http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatcher.aspx[^].

Please see this article which give sufficient introduction:
http://msdn.microsoft.com/en-us/magazine/cc163328.aspx[^].

—SA

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