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The textbox accept only number.

Posted By:laptop charles       Posted Date: July 29, 2010    Points: 10    Category: Visual Studio    URL: http://www.dotnetspark.com  

Using key listiner to accept only number.

*It contain one textbox and keyup listener.
*The following condition accept only number.
Public Class Form1
    Inherits System.Windows.Forms.Form


    Private Sub TextBox1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp
        If e.KeyValue <= 48 Or e.KeyValue <= 57 Then

            MsgBox("It is not a number")
            TextBox1.Text = ""
        End If
    End Sub

End Class


Further Readings:

Author: Kunal Chowdhury         Company URL: http://www.dotnetspark.com
Posted Date: August 14, 2010

Hi Charles,

What is the meaning of this line:

If e.KeyValue <= 48 Or e.KeyValue <= 57 Then

You can directly check: If e.KeyValue <= 57 Then

I think, the condition is wrong there. Please update it properly.


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