当 TextBox 位于非活动选项卡中时，TextBox.ScrollToEnd 不起作用 [英] TextBox.ScrollToEnd doesn't work when the TextBox is in a non-active tab

问题描述

我们的应用程序启动几个后台进程并将它们的输出放入 TextBoxes - 每个在 TabControl 中的一个单独的 TabItem 中.我希望TextBoxes自动滚动显示最后的输出行，所以在将输出/错误行添加到文本框的数据处理函数中，我也调用了TextBox.ScrollToEnd():

Our application starts several background processes and put their output into TextBoxes - each in a separate TabItem in a TabControl. I want the TextBoxes to automatically scroll to show the last output line, so in the data handling function that adds the output/error line to the text box, I also call TextBox.ScrollToEnd():

void OnServerProcessOutputDataReceived(object sender, DataReceivedEventArgs e)
{
    if (e.Data != null)
    {
        Dispatcher.Invoke(new Action(() =>
            {
                TextBox tb = getServerProcessOutputTextBox(sender);
                if (tb != null)
                {
                    tb.AppendText(e.Data + Environment.NewLine);
                    tb.ScrollToEnd();
                }
            }));
    }
}

这对于活动选项卡中的 TextBox 非常有用，但是当我切换到另一个选项卡时，我发现它没有向下滚动到最后.

This works great for the TextBox in the active tab, but when I switch to another tab, I see that it wasn't scrolled down to the end.

这是一个已知问题吗?有办法解决吗?

Is this a known problem? Is there a way to fix it?

推荐答案

设置 CaretIndex:

Set the CaretIndex:

   if (tb != null) 
   { 
       tb.AppendText(e.Data + Environment.NewLine); 
       tb.CaretIndex = tb.Text.Length;
       tb.ScrollToEnd(); 
   } 

这篇关于当 TextBox 位于非活动选项卡中时，TextBox.ScrollToEnd 不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！