Filter special characters in RadTextbox without using regular expression

[Abhi]

Hi all,
I have 2 problems to solve.
1. I am trying to filter a rad textbox in client side. I need to restrict special characters in it. Is there any control like FilteredTextBoxExtender to filter rad textbox ?

 I am really fed up with this.Please provide me a solution for this.

thanks
Abhi

[Shinu]

Hi,

One suggestion is that you can check for regular expression in OnKeyPress event.
JS:

function OnKeyPress(sender, eventArgs)
 {
   var char = eventArgs.get_keyCharacter();
   var exp = /[^a-zA-Z0-9-]/g;
   if (exp.test(char))
   {
    eventArgs.set_cancel(true);
   }
}

Thanks,
Shinu.

[Abhi]

HI,
Thanks for your suggestion. But this OnKeyPress event have some browser compatibility issue. Can we use FilteredTextBoxExtender like control to filter rad textbox.

thanks
abhi

[Vasil]

Hi Abhi,

The FilteredTextBoxExtender can't be used for RadInputControls it can be applied on asp:TextBoxes.

Regards,
Vasil
the Telerik team

[Abhi]

Hi Vasil,
Then how can i restrict special characters in RadTextBox on key press event . Please provide me solution please.

Thanks
Abhi

[Shinu]

Hi,

Try the following javascript to allow only alphabets in RadTextBox.

JS:

function OnKeyPress(sender, eventArgs)
    {
        var c = eventArgs.get_keyCode();
        if ((c < 65) || (c > 90 && c < 97) || (c > 122))
            eventArgs.set_cancel(true);
    }

Also check the following help documentation which explains more about this.
OnKeyPress.

Thanks,
Shinu.

[Sharmin]

This function is OK. But if you are copying a text ~!@#$%^&*()_+-={}|[]\:";'<>?,./` to your textbox, this function will not be called.
I guess Regex expressions are the best way to use it on save.

[Vasil]

Hi Sharmin,

You can override the _onTextBoxPasteHandler handler such way:

Telerik.Web.UI.RadInputControl.prototype.orgPasteHandler = Telerik.Web.UI.RadInputControl.prototype._onTextBoxPasteHandler ;

Telerik.Web.UI.RadInputControl.prototype._onTextBoxPasteHandler = function(e)
{
     //do your logic here; then execute the original handler if you need:
    this.Telerik.Web.UI.RadInputControl.prototype.orgPasteHandler(e);
}

All the best,
Vasil
the Telerik team

[Jim]

Hi,

Can someone post an example of how to override the _onTextBoxPasteHandler handler in VB?

Thanks,
Jim

[Vasil]

Hello Jim,

The code is JavaScript (not C# or VB). You just need to wrap it with <script> tag and place under the declaration of your ScriptManager in your ASPX page.

Regards,
Vasil
Telerik