强制WPF控件刷新？ [英] Force a WPF control to refresh?

问题描述

我们有两个像这样的textBlocks ：（我们使用.NET FW 3.0）

We have two textBlocks like this: (we used .NET FW 3.0)

<TextBlock Grid.Column="0" Name="tabName" Style="{StaticResource textBlockBarStyle}" HorizontalAlignment="Left">
  <TextBlock.Margin>
      <Binding Converter="{StaticResource dpiConverter}">
          <Binding.ConverterParameter>
               <Thickness Left="3" Top="6" Right="0" Bottom="0"/>
          </Binding.ConverterParameter>
      </Binding>
  </TextBlock.Margin>
</TextBlock>

和

<TextBox  x:Name="txtBoxHelp" 
          IsReadOnly="True" Style="{DynamicResource txtBoxHelpStyle}" 
          IsTabStop="False" 
          Text="some text" MouseLeftButtonDown="txtBoxHelp_MouseLeftButtonDown">
     <TextBox.Margin>
        <Binding Converter="{StaticResource dpiConverter}">
            <Binding.ConverterParameter>
                 <Thickness Left="7" Top="0" Right="0" Bottom="0"/>
            </Binding.ConverterParameter>
        </Binding>
     </TextBox.Margin>
</TextBox>

这两个textBlocks在其他OS-es上运行良好，但有时在Windows XP Home Edition上缺少SP3。我们尝试了许多方法来刷新它们，但失败了。

These two textBlocks work well on other OS-es, but sometimes miss on the Windows XP Home Version with SP3. We have tried many ways to refresh these, but failed.

我们尝试了：

1. UpdateLayout


2. InvalidateVisual


3. 将代码中的Set Text属性更改为绑定模式。

如何强制刷新这些控件？

How to force these controls to refresh?

推荐答案

Thread thread = new Thread(new ThreadStart(delegate()
                {
                    Thread.Sleep(200); // this is important ...
                    try
                    {
                        this.Dispatcher.BeginInvoke(DispatcherPriority.Send,
                            new NoArgsHandle(delegate()
                            {
                               // do something, set .Text = "some text"
                            }));
                    }
                    catch { }
                }));
                thread.Name = "thread-UpdateText";
                thread.Start();

效果很好。

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