Textbox validation - Allows Only Alpha-Numeric’s (C# Win Forms)

Posted Date: 12 Dec 2008	Resource Type: Code Snippets	Category: C# Syntax
Author: KR	Member Level: Gold
Rating:	Points: 8

The following steps allows the user to enter only Alpha-Numeric’s (0 to 9/a to z/ A to Z),
-> Drag and drop textbox from toolbox to form
-> Register Textbox KeyPressEvent

Code:
--------

Using System;
using System.Windows.Forms;
using System.Text;

namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

// Textbox KeyPress event block
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
// Allows only Alpha-Numeric’s
if (!(Char.IsLetter(e.KeyChar) || Char.IsDigit(e.KeyChar) || Char.IsControl (e.KeyChar)))
e.Handled = true;
}
}
}

Responses

Author: Miss Meetu Choudhary 10 Apr 2009

Member Level: Diamond Points : 1

For description

Please Describe your code as well to make it more efficient we respect your contributions.

And it will be of great help to viewers if they are well described.

Thanks and Regards
Meetu Choudhary
Editor

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