Convert string value to decimal with thousand separator?

Question

This might be a very simple question. Suppose text box show value 10,000.12 when user edits data by mistake he remove first two numbers like ,000.12 and using this textbox in t

Answer 1

If I understood the question, you want to remove all characters that would prevent the parse routine from failing.

string str = ",0,100.12";

var modified = new StringBuilder();
foreach (char c in str)
{
    if (Char.IsDigit(c) || c == '.')
        modified.Append(c);
}

decimal number= decimal.Parse(modified.ToString());