Numeric value only

vijay antony

hi friend,
in my project for example one textbox i need to type only numbers not the characters if i type the chars it will show
wat shall i do

my idea is it can be done in textbox_keypress event
can anybody give a solution

4 Replies

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paul daniel16y ago
Private Sub Text1_KeyPress(KeyAscii As Integer)
    Dim Counter As Byte
    Dim IsNumber As Boolean

    IsNumber = False

    For Counter = 0 To 9
        If Chr$(KeyAscii) = Trim(Counter) Then IsNumber = True
    Next

    If Not IsNumber Then MsgBox ("That is not a number.")
End Sub
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Naresh Kodumuri16y ago
function isNumberKey(evt)
{
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48 || charCode > 57) )
return false;
return true;
}

write this function onkeypress="return isNumberKey(event)"

0
Hirendra Sisodiya16y ago
you can use MaskedTextBox also.

0
kiran kumar16y ago
hello vijay,try this code
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 keypress
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.textBox1.KeyPress += new KeyPressEventHandler(textBox1_KeyPress);
}

private void Form1_Load(object sender, EventArgs e)
{

}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{

if(char.IsLetter(e.KeyChar))
{

e.Handled = true;
MessageBox.Show("enter numeric value");
}
}
}
}
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0