vb.net我需要导入什么才能使用textrange？

Question

I'm trying to use

following code to change richtextbox content to text like.

Dim tr As New TextRange(rtb.Document.ContentStart, rtb.Document.ContentEnd)

documentText = tr

        Dim titleMatch As Match = Regex.Match(documentText, expression, options)

But it says Type 'TextRange' is not defined. Any advice, please.

Answer 1

You need to import System.Windows.Documents .

You can see this by looking at the documentation for TextRange :

Namespace: System.Windows.Documents

Assembly: PresentationFramework (in PresentationFramework.dll)