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Version Q2 2011 released 07/12/2011
select

Calendar / Validation

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  • Validating the dates picked by the user can be done by using the standard ASP.NET validator controls. This example shows a sample period selection page. The user has to enter two dates, the second one being after the first.

    We are using two RequiredFieldValidator instances to ensure the date pickers are not left empty. A CompareValidator ensures that the second date is greater than the first one.

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page CodeFile="DefaultCS.aspx.cs" Language="c#" AutoEventWireup="false" Inherits="Telerik.Web.Examples.Calendar.Functionality.Validation.DefaultCS" %>

    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="qsf" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <qsf:HeadTag runat="server" ID="Headtag1"></qsf:HeadTag>
    </head>
    <body class="BODY">
        <form runat="server" id="mainForm" method="post">
        <qsf:Header ID="Header1" runat="server" NavigationLanguage="CS"></qsf:Header>
        <telerik:RadScriptManager ID="RadScriptManager1" runat="server" />
        <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server">
            <table>
                <tr>
                    <td>Start:&nbsp;</td>
                    <td>
                        <telerik:RadDatePicker ID="RadDatePicker1" MinDate="2009/1/1" runat="server">
                        </telerik:RadDatePicker>
    <asp:RequiredFieldValidator runat="server" ID="RequiredFieldValidator1" ControlToValidate="RadDatePicker1"
    ErrorMessage="Enter a date!"></asp:RequiredFieldValidator>
                    </td>
                    <td rowspan="2">
                        <asp:Label ID="Label1" runat="server"></asp:Label>
                    </td>
                </tr>
                <tr>
                    <td>End:&nbsp;</td>
                    <td>
                        <telerik:RadDatePicker ID="RadDatePicker2" MinDate="2009/1/1" runat="server">
                        </telerik:RadDatePicker>
    <asp:RequiredFieldValidator runat="server" ID="Requiredfieldvalidator2" ControlToValidate="Raddatepicker2"
    ErrorMessage="Enter a date!"></asp:RequiredFieldValidator>
                    </td>
                </tr>
                <tr>
                    <td></td>
                    <td>
    <asp:CompareValidator ID="dateCompareValidator" runat="server" ControlToValidate="Raddatepicker2"
    ControlToCompare="RadDatePicker1" Operator="GreaterThan" Type="Date" ErrorMessage="The second date must be after the first one.<br /><br />">
                        </asp:CompareValidator>
                        <asp:Button runat="server" Text="Save" ID="Button1" CssClass="qsfButton" OnClick="Button1_Click"></asp:Button>
                    </td>
                </tr>
            </table>
        </telerik:RadAjaxPanel>
        <qsf:Footer ID="Footer1" runat="server"></qsf:Footer>
        </form>
    </body>
    </html>

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