how to validate text box

Question

in text box i restrict to type special characters. i want to type only characters. how to validate please help me.

abdur rehman · Answer

add this event to textbox this.txtBox.Validating += new System.ComponentModel.CancelEventHandler(this.numberBox_Validating); use this function to validate private void numberBox_Validating(object sender CancelEventArgs e) { try { int numberEntered = int.Parse(numberBox.Text); if (numberEntered 10) { e.Cancel = true; MessageBox.Show(You have to enter a number between 1 and 10); } } catch (FormatException) { e.Cancel = true; MessageBox.Show(You need to enter an integer); } } the above code validates numbers u can use ascii value to check for your range of specail characters