Textbox display formatting

Question

I want to add \",\" to after every group of 3 digits. Eg : when I type 3000000 the textbox will display 3,000,000 but the value still is 3000000.
I tried to use maskedte

Answer 1

This may work fine for your scenario I hope.

 private string text
        {
            get
            {
                return text;
            }
            set
            {
                try
                {
                    string temp = string.Empty;
                    for (int i = 0; i < value.Length; i++)
                    {
                        int p = (int)value[i];
                        if (p >= 48 && p <= 57)
                        {
                            temp += value[i];
                        }
                    }
                    value = temp;
                    myTxt.Text = value;
                }
                catch
                { 

                }
            }
        }

    private void digitTextBox1_TextChanged(object sender, EventArgs e)
    {
        if (myTxt.Text == "")
            return;
        int n = myTxt.SelectionStart;
        decimal text = Convert.ToDecimal(myTxt.Text);
        myTxt.Text = String.Format("{0:#,###0}", text);
        myTxt.SelectionStart = n + 1;
    }

Here, myTxt = your Textbox. Set Textchanged event as given below and create a property text as in the post.

Hope it helps.