Mask the TextBox

zaboboa

Hello, I would like to mask the text box such that it would only be for the money amounts, and it would have $ sign in front. So for input in textbox: 4500 Masked to: $ 4,500 Any ideas? Thank you.

BammBamm

You could just format the number before you display it. double x = 4500.00; textBox2.Text= x.ToString("c"); output = $4,500.00

Mohamad Al Husseiny

This the modification version of MaskedTextControl from User Interfaces in C# book

using System;
using System.Windows.Forms;
public class MaskedTextBox : TextBox
{
	private string mask;
	public string Mask
	{
		get
		{
			return mask;
		}
		set
		{
			mask = value;
			this.Text = "";
		}
	}

Protected override void OnKeyPress(KeyPressEventArgs e)
	{
if (Mask != "")
{
e.Handled = true;
string newText = this.Text;
bool finished = false;
for (int i = this.SelectionStart; i < mask.Length; i++)
{
	switch (mask[i].ToString())
	{
	case "#" :
	   if (Char.IsDigit(e.KeyChar) )
	   {
	      if(this.TextLength

In the Form Load event add the following maskTextBox.Mask = "$###,###"; MCAD

zaboboa

There seems to be an error: if(this.TextLength { in this line, the IF statement is not completed, or am I reading it incorectly? Is it: if (this.TextLength != 0) Another thing, to make the amount bigger, do I just increase the mask line: "$###,###,###....", or there is a better way? Thank you

Mohamad Al Husseiny

sorry some thing wrong was happend replace if(this.TextLength { with if(this.TextLength<mask.Length) This prevent the user form enter number longer than mask lenght **zaboboa wrote:** _Another thing, to make the amount bigger, do I just increase the mask line: "$###,###,###....", or there is a better way?_ Yes you cab write mask like $###,###,### or even $(###)(###),(###) **Note**:this quick code so test it before you use it and you may add another thibgs like backspace... MCAD

zaboboa

You know, it will work better if you put this statement insted if(this.TextLength == this.SelectionStart) Of course for this mask to be perfect you have to add a Leave event, in case the user leaves the box, with the input like that $455,6 Thank you for your help, it gave me a big jumpstart.

Mohamad Al Husseiny

zaboboa wrote: Of course for this mask to be perfect you have to add a Leave event, in case the user leaves the box, with the input like that $455,6 And Copy and Paste there are many things you can add it Go on MCAD