How to clear text content in RichTextBox

Question

After getting the text in the RichTextBox I want to clear the text. How can I do that?

TextRange txt = new TextRange(richtxtSNotice.Document.ContentStart, richtxtSNotice.Document.ContentEnd);
MessageBox.Show(txt.Text);

Answer 1

使用以下内容：

_richTextBox.Document.Blocks.Clear();

Answer 2

This is a simple way of doing it.

        public void Clear()
        {
            richTextBox1.SelectAll();

            richTextBox1.Selection.Text = "";
        }

Answer 3

Try to create a TextRange with RichBoxText content, then set Text to empty string:

TextRange txt = new TextRange(richtxtSNotice.Document.ContentStart, richtxtSNotice.Document.ContentEnd);
txt.Text = "";

Answer 4

I found that clearing the richTextBox didn't always remove all of the text from the richTextBox using richTextBox.Text = ""; or richTextBox.Clear(); Only the first few lines were cleared.

To fix this issue, I included the Update() function call solved this issue.

richTextBox.Clear();

followed by

richTextBox.Update();

to reliably clear the richTextBox.

Answer 5

To clear all content of richtext box you can use the following code

richTextBox1->SelectAll();
richTextBox1->Clear();

Answer 6

easiest way I know how is to put

       (your richTextbox name).text = "";

that tells it to replace anything in the textbox field with blank code. I'm sure there are other ways to do it too though.