Validation For A Textbox

Ramesh Ushodaya

13y2.2kVisual Basic .NET

Hi ,

Need a validation code for a textbox in windows form, that allow me to enter the values like

1.3

1.33

11.33

I am using this text box for entering tax values .

this textbox should allow only two digits before and after decimal point .

Thanks in advance :)

8 Replies

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waqas memon13y ago
Accepted answer
hi ramesh try this link http://codingresolved.com/discussion/41/how-to-restrict-textbox-to-numbertextbox-numbers-onlytextbox-just-numbers/p1
Ramesh Ushodaya13y ago
Its working good .
Thank you so much :)
Iftikar Hussain13y ago
you can use MaskTextBox

set the mask as 00.00

Regards,
Iftikar
Ramesh Ushodaya13y ago
Its not working sir,
I need this validation when Keypress.
It should work like this

User can allow to enter upto two digits before and after the decimal point.
if user enter two digits it should not allow for the third digit but it can allow ".".
if user enter "." it should allow only two digits after ".".

like 2, 22, 2.3, 2.33, .3, .33, 2.33, 22.33

A Big Thanks for the replies :) .
But need a Perfect solution :( .
Iftikar Hussain13y ago
here it is

this.textBox1.KeyPress += new KeyPressEventHandler(this.textBox1_KeyPress);

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
var text = textBox1.Text.Trim();
if (Regex.IsMatch(text, @"^\d{1,2}(\.\d{1,2})?$"))
{
// Do something here
}
else
{
MessageBox.Show("Doesn't match pattern");
}
}

Regards,
Iftikar
Ramesh Ushodaya13y ago
Thanks for the reply ,
I need this validation when key press .
Is it possible ?
Iftikar Hussain13y ago
Hi,
Try like this
you need to do this after entering the data in textbox

this.textBox2.Leave += new System.EventHandler(this.textBox1_TextLeave);

private void textBox1_TextLeave(object sender, EventArgs e)
{
var text = textBox1.Text.Trim();
if (Regex.IsMatch(text, @"^\d{1,2}(\.\d{1,2})?$"))
{
// Do something here
}
else
{
MessageBox.Show("Doesn't match pattern");
}
}

Regards,
Iftikar
Pankaj Pandey13y ago
hii

create a function in which split the textbox data by ".".

var x=txtbox.text.Split(".");
string y=x[0].tostring();
string z=x[1].tostring();

now check that if x.lenght>2 or y.length>2 then raise validation.