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How to validate a TEXTBOX entry to be only numeric or in a certain datatype?
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How to validate a TEXTBOX entry to be only numeric or in a certain datatype?
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2 solutions

For numeric validation -

VB
Private Sub txt_KeyPress
(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) 
Handles txt.KeyPress

If Char.IsDigit(e.KeyChar) = False And Char.IsControl(e.KeyChar) = False Then
e.Handled = True
End If
End Sub
 
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Posted
Updated 21-Feb-10 1:49am
v2
add this javascript to you page.

Call this function by sending id you will get numeric text box

function EnterInteger(ID)
{
if(ID.value.length>0)
{
ID.value = ID.value.replace(/[^\d]+/g, '');
}
}

or create regular expression validator with this \d+(\.\d{1,2})?
expression.

You will get numeric text box.
 
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