Append text to the beginning in the Rich Text Box

Question

private void button1_Click(object sender, EventArgs e)
{
    richTextBox1.AppendText(\"\\r\\n\");
    richTextBox1.Focus();
    string s = \"Enter \";
    richTextBo         


        

Answer 1

Simplest way i prefer is,

    private void button1_Click(object sender, EventArgs e)
    {
        richTextBox1.Text = DateTime.Now.ToString() + richTextBox1.Text;
    }

It will prepend Current DateTime at Start.

Answer 2

Technically if you're inserting it at the top of the text, you're "inserting" or "prepending", not "appending". ;)

You can use the SelectedText property to insert text at the start of a RichTextBox. I just knocked up a quick demo app to test it out:

    private void button1_Click(object sender, EventArgs e)
    {
        richTextBox1.SelectionStart = 0;
        richTextBox1.SelectionLength = 0;
        richTextBox1.SelectedText = DateTime.Now.ToString();
    }

That inserts the current time at the start of the RichTextBox when button1 is clicked.

Answer 3

previous messages seems obsolete. I solve it by :

Paragraph newExternalParagraph = new Paragraph();
newExternalParagraph.Inlines.Add( new Bold(new Run("[" + hour.ToString() + ":" + minute.ToString() + "]"))
{
    Foreground = Brushes.Yellow
});
_consoleText.Document.Blocks.InsertBefore(_consoleText.Document.Blocks.FirstBlock , newExternalParagraph);