How to Leave Form Rich Text Box When Curser At Line Three

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I Want To Focus To Another Object From Rich Text Box When It Reach The Third Line By Pressing
Enter Key
Eg,
......... Press Enter
......... Press Enter
......... Press Enter (At This Point)
Focus To Another Object like Combobox Or Text Box

How To Do This..?
Thanks

Posted 1-Aug-13 20:40pm

anushikaroshan

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Fredrik Bornander · Accepted Answer · 2013-08-01T20:51:00

You can hook into the PreviewKeyDownEvent on your RichTextBox and then focus the next control if the pressed key is Enter and the RichTextBox has three lines;

C#

using System.Linq;
using System.Windows.Forms;

namespace WindowsFormsApplication1 {

    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }

        private void richTextBox1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e) {

            if (e.KeyCode == Keys.Enter && richTextBox1.Lines.Count() == 3)
            {
                button1.Focus();
            }
        }
    }
}

Hope this helps,
Fredrik