How to use validation on Text Box in windows applications c#

Question

How to use validation on Text Box in windows app.. in this TextBox value is '0' then it show the error give a validation control on TextBox....

sri · Answer

ya i got it .... Thanks.

sri · Answer

It show the error errorProvider1 is does not exist....

sri · Answer

Here i am getting error on errorProvider1.SetError(textBox1 You have entered 0);

Satyapriya Nayak · Answer

Hi Sri using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication3 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void textBox1_TextChanged(object sender EventArgs e) { if (Convert.ToBoolean(textBox1.Text == 0)) { errorProvider1.SetError(textBox1 You have entered 0); } else { errorProvider1.Clear(); } } } } Thanks

Dorababu Meka · Answer

You can use error provider control and make it fires when your value is 0 check here for error provider http://www.dotnetperls.com/errorprovider