make text box accept only numbers

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I need help making a textbox accept only numbers. I use vb.net. On second thought, it would be nice if it can accept decimals and negative numbers, too.

Posted 9-Aug-13 10:18am

Sammyw10

Updated 12-Aug-13 18:01pm

v2

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Shahan Ayyub 13-Aug-13 2:26am

Try using my approach...

5 solutions

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ridoy · Answer 1 · 2013-08-09T10:22:00

Solution 2

In short you can try something like..

VB

Private Sub TextBox1_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress

        If Not Char.IsDigit(e.KeyChar) And Not Char.IsControl(e.KeyChar) Then
           e.Handled = True
        End If

    End Sub

Also see these..
How to create a text box that accepts only numbers and full stop in VB.Net[^]
Vb-net-need-text-box-to-only-accept-numbers[^]
How-to-allow-user-to-enter-only-numbers-in-a-textbox-in-vb-net[^]

Posted 9-Aug-13 10:22am

ridoy

Updated 9-Aug-13 10:25am

v3

Comments

Sergey Alexandrovich Kryukov 9-Aug-13 17:04pm

5ed.
—SA

ridoy 10-Aug-13 1:49am

Thanks SA,:)

Aydin Homay 10-Aug-13 4:23am

My vote of 5 Sergey ;)

Sergey Alexandrovich Kryukov 10-Aug-13 6:37am

Thank you, Aydin.
—SA

Richard C Bishop · Answer 2 · 2013-08-09T10:21:00

Solution 1

Use a Regex validator that .Net offers.

If you don't know what that is, use a search engine and get your "learn" on.

Posted 9-Aug-13 10:21am

Richard C Bishop

Updated 9-Aug-13 10:24am

v5

Mr.TMG · Answer 3 · 2013-08-09T13:48:00

Solution 3

In the .net toolbox, is the control, NumericUpDown. It's so very handy.

You can set it to accept decimals of x length or integer.
Access it's value by, X as integer = NumUpDown.Value.

Posted 9-Aug-13 13:48pm

Mr.TMG

Shahan Ayyub · Answer 4 · 2013-08-12T19:40:00

Solution 4

Try using MaskedTextBox[^] instead and specify format for numbers only.

Posted 12-Aug-13 19:40pm

Shahan Ayyub

Prafulhk · Answer 5 · 2013-08-13T02:06:00

Solution 5

Use if(Decimal.TryPharse(string entedvalue, out resultvalue) == true)
then decimal nuber or number

Posted 13-Aug-13 2:06am

Prafulhk