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C# string manipulation

Posted on 2016-08-22
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Last Modified: 2016-08-22
Lets say I have a string, i.e.
"firstname1 lastname1; firstname2 lastname2; firstname3 lastname3; firstname4 lastname4; "
in a TextBox, how can I by clicking on any firstname or lastname get both selected together with semicolon?
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Question by:ybt
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Dustin Saunders earned 2000 total points
ID: 41765891
Something like this would break it apart and do the selection.
        private void textBox1_MouseClick(object sender, MouseEventArgs e)
        {
            if (textBox1.Text.Length > 0)
            {
                //get the position of our click.
                int position = textBox1.SelectionStart;
                //figure out where the semi colon before this selection is.
                string formerText = textBox1.Text.Substring(0, position);
                int startPosition = formerText.LastIndexOf(';') + 1;
                //figure out where the semi colon after the start of this name block is.
                string nameText = textBox1.Text.Substring(startPosition);
                int semiColonPosition = nameText.IndexOf(';');
                //select the items between the two semicolons.
                textBox1.SelectionStart = startPosition;
                textBox1.SelectionLength = semiColonPosition;
            }
        }

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Author Closing Comment

by:ybt
ID: 41765969
Thank you, it's working, I just had to check for empty string if an user clicks outside of a text in the TextBox.
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