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how to make RegExpTextBoxSetting allow empty string

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Input

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Accepted

answered on 29 Apr 2010, 10:56 AM

Hello Arnold,

This should be the default behavior of RadInputManager. Here is a simple demo:

<%@ Page Language="C#" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head id="Head1" runat="server">

<meta http-equiv="content-type" content="text/html;charset=utf-8" />

<title>RadControls</title>

</head>

<body>

<form id="form1" runat="server">

<asp:ScriptManager ID="ScriptManager1" runat="server" />

<telerik:RadInputManager ID="RadInputManager1" runat="server">

<telerik:RegExpTextBoxSetting ValidationExpression="[0-9]{2}">

<TargetControls>

<telerik:TargetInput ControlID="TextBox1" />

</TargetControls>

</telerik:RegExpTextBoxSetting>

</telerik:RadInputManager>

Enter a two digit number or leave the textbox empty:

<asp:TextBox ID="TextBox1" runat="server" />

<asp:Button ID="Button1" runat="server" Text="PostBack" />

</form>

</body>

</html>

Best wishes,
Dimo
the Telerik team

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