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I have a control like:

<asp:TextBox ID="_txtLeadDate" runat="server"></asp:TextBox>
   <AjaxControl:CalendarExtender ID="_txtLeadDate_CalendarExtender" Format="dd/MMM/yyyy" runat="server" Enabled="True" TargetControlID="_txtLeadDate"></AjaxControl:CalendarExtender><br />
   <asp:RequiredFieldValidator ID="RequirePreDate" runat="server" ControlToValidate="_txtLeadDate" ErrorMessage="Please select a Date" ForeColor="Red" Font-Size="10px" SetFocusOnError="True"></asp:RequiredFieldValidator>



Now I am trying to add another validation that date selected should't be a past date (only current and future date). How can I achieve that. Kindly help.
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1 solution

you can simply set start date as yesterday then user can't select old days. in page load do as below
protected void Page_Load(object sender, EventArgs e)
{
   _txtLeadDate_CalendarExtender.StartDate = DateTime.Now.AddDays(-1);   //to dissable past Date
}
   

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