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Adorner in WPF Textbox RRS feed

  • Question

  • I have created an adornerlayer over wpf textbox.

    This code block will return the bounds of the text in textbox, i have written this block in onrender method of a adorner class.

    Rect startPosition = textBox.GetRectFromCharacterIndex(startingCharOfAWord);
    Rect endPosition = textBox.GetRectFromCharacterIndex(endingCharOfAWord,true);
    Rect rectUnion = Rect.Union(startPosition, endPosition);
    

    using this(rectPosition) position i can highlight the text in the textbox.

    My Question : My textbox has more than 500 words. I need to scroll to read the text in the textbox. while scrolling in it, i used PreviewMouseWheel Event to update the adorner layer. But Rect returns empty. So i can't able get the bounds of the text.

    Suggest me an idea to get Rect value of the text when scrolling the text in the texbox.

    Monday, July 13, 2020 7:25 AM

All replies

  • Hi Naveen_047,

    Since your question is more related to WPF, so I suggest you post your question in WPF forum where you can get more efficient and professional responses.

    Q&A/wpf

    Thank you for your understanding.

    Best Regards,

    Xingyu Zhao


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    Monday, July 13, 2020 9:38 AM