I am adding datepicker in girdview in visual web part project.Below is the HTML code.When i build the project I am getting error as 'txtImpactedEndTime' does not exist in current context. Please suggest.
<asp:TemplateField HeaderText="End Time" HeaderStyle-ForeColor="#357328" HeaderStyle-Font-Bold="false">
<ItemTemplate>
<asp:TextBox ID="txtImpactedEndTime" runat="server" Text='<%# Eval("Col4") %>'></asp:TextBox>
<a href="javascript:NewCssCal('<%= txtImpactedEndTime.ClientID %>','DDMMMYYYY','arrow',true,'24');">
<img id="ImgImpactedEndTime" src="https://gdpdev.accenture.com/Shared%20Documents/cal.gif" runat="server" style="padding-right: 7px; padding-left: 0px; border: none; vertical-align: middle; padding-bottom: 5px; padding-top: 1px; background-repeat: no-repeat;" /></a>
<%--<SharePoint:DateTimeControl ID="dtcImpactedEndTime" runat="server" SelectedDate='<%# Eval("Col4") %>' />--%>
</ItemTemplate>
<ItemStyle Width="15%" />
</asp:TemplateField>