只读运行在一个WPF RichTextBox的内容是什么？ [英] Read-only Run elements in a WPF RichTextBox?

问题描述

我可以完全想象这一点，但我可以发誓有一种方法，使各个运行（或Parapgraph）元素在一个RichTextBox只读。我也可以发誓我尝试过的方法在几个星期前做了这一点，我和很满意的结果 - 我依稀记得它看起来是这样的：

I may be completely imagining this, but I could have sworn there was a way to make individual Run (or Parapgraph) elements in a RichTextBox read-only. I also could have sworn I tried a method for doing this out myself a few weeks ago and was satisfied with the results - I vaguely remember it looked something like this:

<RichTextBox x:Name="richTextBox"
             AcceptsTab="True"
             AcceptsReturn="True"
             FontFamily="Courier New"
             FontSize="14">
    <FlowDocument>
        <Paragraph>
            <Run IsReadOnly="True">I wish this was read-only!</Run>
        </Paragraph>
    </FlowDocument>
</RichTextBox>

现在，几个星期后，我去试试，使运行元素只读一个RichTextBox才发现它似乎并不可能。

Now, a few weeks later, I go to try to make Run elements read-only in a RichTextBox only to find it doesn't seem to be possible.

<一个href="http://social.msdn.microsoft.com/forums/en-US/wpf/thread/329079fc-8555-4192-b90e-6fccd43bf28a">This张贴在MSDN论坛似乎证实了这一点。

难道我完全想象吗？或者是有没有办法做我想做的事？

Did I completely imagine this? Or is there a way to do what I want to do?

推荐答案

好吧，我想出了一个解决方案，适用于我的情况 - 但是可能大家谁愿意这样的事情不能正常工作。它的混乱，但它的工作。

Alright, I've come up with a solution that works for my case - but may not work for everyone who wants something like this. It's messy, but it does the job.

我不打算接受我自己的答案了几天，以防万一别人有完成这个更好的办法。

I'm not going to accept my own answer for a few days, just in case someone else has a better way of accomplishing this.

在这里，我们去，首先，XAML：

Here we go, first, the XAML:

<Window x:Class="WpfApplication1.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window1"
        Height="500"
        Width="600">
    <DockPanel LastChildFill="True">
        <RichTextBox x:Name="rtb"
                     FontFamily="Courier New"
                     FontSize="14"
                     PreviewKeyDown="rtb_PreviewKeyDown">
            <FlowDocument>
                <Paragraph>
                    <InlineUIContainer Unloaded="InlineUIContainer_Unloaded">
                        <TextBlock FontFamily="Courier New" FontSize="14">This line of text is not editable.</TextBlock>
                    </InlineUIContainer>
                    <Run Foreground="Blue">But this is editable.</Run>
                </Paragraph>
            </FlowDocument>
        </RichTextBox>
    </DockPanel>
</Window>

和后面的code：

using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void InlineUIContainer_Unloaded(object sender, RoutedEventArgs e)
        {
            (sender as InlineUIContainer).Unloaded -= new RoutedEventHandler(InlineUIContainer_Unloaded);

            TextBlock tb = new TextBlock();
            tb.FontFamily = new FontFamily("Courier New");
            tb.FontSize = 14;
            tb.Text = "This line of text is not editable.";

            TextPointer tp = rtb.CaretPosition.GetInsertionPosition(LogicalDirection.Forward);
            InlineUIContainer iuic = new InlineUIContainer(tb, tp);
            iuic.Unloaded += new RoutedEventHandler(InlineUIContainer_Unloaded);
        }

        private void rtb_PreviewKeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                var newPointer = rtb.Selection.Start.InsertLineBreak();
                rtb.Selection.Select(newPointer, newPointer);

                e.Handled = true;
            }
        }
    }
}

我的解决方案依赖于一个事实，当一个 InlineUIContainer 从UI中删除，这是卸载（）方法被调用。在这一点上，我只是重新插入删除 InlineUIContainer 在当前插入符号位置。

My solution relies on the fact that when an InlineUIContainer is removed from the UI, it's Unloaded() method is called. At that point, I simply reinsert the deleted InlineUIContainer at the current caret position.

对于任何黑客，有一堆缺点。是我发现的缺点如下：

As with any hack, there are a bunch of disadvantages. The disadvantages I'm finding are the following:

• 我要为只读需要的文本被圈在一个 InlineUIContainer 。这是一个有点限制了该解决方案。
• 我要捕捉Enter键，并插入换行符手动，否则， InlineUIContainer.Unloaded（）保持射击每次回车键pressed。不好玩，但它适合我的情况。

• The text I want to be read-only needs to be wrapped in a InlineUIContainer. That is a little limiting for this solution.
• I have to capture the 'Enter' key and insert line breaks manually, otherwise, InlineUIContainer.Unloaded() keeps firing everytime the Enter key is pressed. Not fun, but it works for my case.

这不是一个很好的解决方案，但我认为它会为我工作。就像我说的，我不会以纪念这个作为回答我自己的问题还没有 - 希望别人都会有这样做的更好的办法

It's not a great solution, but I think it will work for me. Like I said, I'm not going to mark this as an answer to my own question yet - hopefully someone else will have a better way of doing this.

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