1)首先检查您是否已参考AJAX程序集.

1) First check that you have take reference of AJAX assembly.

<![CDATA[<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>

2)如下使用文本框控件和压延机扩展控件.

2) Use Textbox control and calender extender control as below.

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

<cc1:CalendarExtender ID="dtpDate" runat="server" TargetControlID="txtValidateFrom"
                                        PopupPosition="BottomLeft">

3)您还可以使用遮罩编辑扩展器和遮罩验证器控件来验证日期.

3) You can also user mask edit extender and mask validator control to validate date.

<cc1:MaskedEditExtender ID="mskedtDate" TargetControlID="txtValidateFrom" Mask="99/99/9999"
                                       MessageValidatorTip="true" runat="server" MaskType="Date" InputDirection="RightToLeft"
                                       AcceptNegative="Left" DisplayMoney="Left" ErrorTooltipEnabled="True" />

<cc1:MaskedEditValidator ID="MaskedEditValidator5" runat="server" ControlExtender="mskedtDate"
                                      ControlToValidate="txtValidateFrom" EmptyValueMessage="Date is required" InvalidValueMessage="Date is invalid"
                                      Display="Dynamic" ValidationGroup="save" EmptyValueBlurredText="*" InvalidValueBlurredMessage="*" />

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