how to validate text field on paste event

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hi,
I have numeric textfield, on paste of some text it should validate the text.
Can any one suggest me a way for this.

I have added below code to work when a user enter number,

<telerik:RadNumericTextBox ID="_rdtxtScanNumber" runat="server" MinValue="0" MaxValue="999999999999999999" NumberFormat-GroupSeparator="" NumberFormat-KeepNotRoundedValue="False" NumberFormat-DecimalSeparator=" " NumberFormat-DecimalDigits="0" Width="250px" >
<ClientEvents OnKeyPress="ValidateNumber" />
</telerik:RadNumericTextBox>

and in ValidateNumber function when user enter last key, it will validate the number and works fine. but in case of pasting it won't work
can any one suggest a way to handle this.

Posted 12-Jun-11 23:35pm

Jijutj

Updated 13-Jun-11 20:09pm

v2

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RakeshMeena · Answer 1 · 2011-06-12T23:47:00

Solution 3

You can use "onPaste" event to put validation at client side. Try this link.
Hope it helps!

Posted 12-Jun-11 23:47pm

RakeshMeena

codingrocks · Answer 2 · 2011-06-13T01:56:00

Solution 5

You can use the following on textbox declaration in aspx page.

OnPaste="JavaScript:return RestrictCopyPaste();"

And use this javascript function also.

function RestrictCopyPaste()
{
    var num = clipboardData.getData('Text')
    if(parseInt(num) != num)
        return false;
}

Tested and worked for all scenarios.

Posted 13-Jun-11 1:56am

codingrocks

Comments

Tarun Mangukiya 13-Jun-11 8:13am

I agree

OriginalGriff · Answer 3 · 2011-06-12T23:38:00

Solution 1

Handle the TextChanged event, and ensure no non-numeric characters have been pasted - if they have, remove them.

Posted 12-Jun-11 23:38pm

OriginalGriff

Comments

RakeshMeena 13-Jun-11 5:48am

My 5.... Good one! See my answer for client side handling.

BobJanova 14-Jun-11 6:02am

My 4 ... server side would be very annoying to use, client side (JS) is much better.

Kirankumar Ballapalli · Answer 4 · 2011-06-12T23:41:00

Solution 2

Hi,

Please use the onkeypress or onblur event for textbox.
In those events write one javascript function which will validate the entered text.

Regards,
Kiran.

Posted 12-Jun-11 23:41pm

Kirankumar Ballapalli

Joemar Valete · Answer 5 · 2011-06-12T23:51:00

Solution 4

On the text change put this codes

C#

System.Windows.Forms.TextBox txtNumOnly = (System.Windows.Forms.TextBox)sender;
if(!Char.IsDigit(txtNumOnly.Text))
{
   txtNumOnly.Text = "";
}

Posted 12-Jun-11 23:51pm

Joemar Valete

Updated 13-Jun-11 2:43am

v4

Comments

Kiran Sonawane 13-Jun-11 8:44am

Always use code block for your code

BobJanova 14-Jun-11 6:03am

My 4 ... server side would be very annoying to use, client side (JS) is much better.

[no name] 11-Aug-11 3:06am

The question was for ASP.NET not WinForms