Multiline for WPF TextBox

问题:

I am developing an app for sending some feedback.

Basically I'm trying to make a TextBox for comments, but I'm used to the WinForms MultiLine=true. I've set MinLines to 3, which is getting there, but preferably I'd like it if the user is able to type wherever in this block - like press enter and do dot points sort of thing. For example:

- Item 1        blah
- Item 2                blahlb lahbvl   d

But at the moment the text all stays on one line.

- Item 1         blah - Item 2                      blahb blahb blah

These comments will then help fill the body of an email which is sent. It may be pointless if I can't easily keep the same formatting when putting this string into the email body string (so that it looks like it does when sent as it does when typed).

Can I achieve what I'm after or do I have to leave it as all text on one line?

回答1:

Enable TextWrapping="Wrap" and AcceptsReturn="True" on your TextBox.

You might also wish to enable AcceptsTab and SpellCheck.IsEnabled too.

回答2:

Also, if, like me, you add controls directly in XAML (not using the editor), you might get frustrated that it won't stretch to the available height, even after setting those two properties.

To make the TextBox stretch, set the Height="Auto".

UPDATE:

In retrospect, I think this must have been necessary thanks to a default style for TextBoxes specifying the height to some standard for the application somewhere in the App resources. It may be worthwhile checking this if this helped you.

回答3:

Here is the sample XAML that will allow TextBox to accept multiline text and it uses it's own Scrollbars:

<TextBox
Height="200"
Width="500"
TextWrapping="Wrap"
AcceptsReturn="True"
HorizontalScrollBarVisibility="Disabled"
VerticalScrollBarVisibility="Auto"/>

回答4:

Contrary to @Andre Luus, setting Height="Auto" will not make the TextBox stretch. The solution I found was to set VerticalAlignment="Stretch"