Required Field Validation and Current Date Validation on asp textbox Control

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C#

ASP.NET

Javascript

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I have a control like:

XML

<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.

Posted 19-Dec-14 19:38pm

Mahatma Aladdin

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DamithSL · Answer 1 · 2014-12-19T19:50:00

Solution 1

you can simply set start date as yesterday then user can't select old days. in page load do as below

C#

protected void Page_Load(object sender, EventArgs e)
{
   _txtLeadDate_CalendarExtender.StartDate = DateTime.Now.AddDays(-1);   //to dissable past Date
}

Posted 19-Dec-14 19:50pm

DamithSL