Richtextbox.text override property in VB.NET WPF

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I am new to VB.net. I want to use Richtextbox.Text. However, the error showing that Text is not part of Richtextbox. Upon checking further, I can see that it can be overridden using Overrides Property Text As String from the link
RichTextBox.Text Property (System.Windows.Forms)[^]

I would like to know how to add it to project or class. Please help. Thank you.

What I have tried:

Nothing has worked. Tried using Textrange and not working

Posted 1-Jul-18 11:59am

Member 13857021

Updated 3-Jul-18 3:57am

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Ralf Meier 1-Jul-18 18:24pm

Ähh ...sorry ... my Richtextbox has a Text-Property ...
Tell something more ...

Member 13857021 1-Jul-18 19:00pm

Form2.RichTextBox1.Text = ""
Form2.RichTextBox1.Text = Form2.RichTextBox1.Text & textline(n) & vbCrLf

When I tried this, I am getting
'Text' is not a member of 'System.Windows.Control.RichTextbox'

Member 13857021 1-Jul-18 19:04pm

Also, in another project, I can see that the same is implemented. However, it shows while hovering over text "Public Overrides Property Text As String"

Bernhard Hiller 2-Jul-18 3:54am

In the title, you talk about "WPF", but then your code uses "Windows Forms" - they are different. With WPF, use MVVM pattern, do not access properties of UI elements directly, despite Microsoft still keeps that doable.

Member 13857021 2-Jul-18 11:42am

As far as I know, it is WPF. I was adding all the features using coding only. I do not have good idea about the difference, however, the best I know is most of the features on toolbox is missing for WPF which is happening for me now. If any of you able to provide a contact detail, I can share the project with u.

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Richard Deeming · Answer 1 · 2018-07-03T03:57:00

As Bernhard mentioned in the comments, you're looking at the documentation for the Windows Forms control. You need to look at the documentation for the WPF control, which doesn't have a Text property:

RichTextBox Class (System.Windows.Controls) | Microsoft Docs[^]

To get or set the text, you can use the code from this StackOverflow answer[^]:

VB.NET

' Set the text:
richTextBox1.Document.Blocks.Clear()
richTextBox1.Document.Blocks.Add(new Paragraph(new Run("The text...")))

' Read the text:
Dim text As String = New TextRange(richTextBox1.Document.ContentStart, richTextBox1.Document.ContentEnd).Text

How to: Extract the Text Content from a RichTextBox | Microsoft Docs[^]
How to: Save, Load, and Print RichTextBox Content | Microsoft Docs[^]