The validators shipped with .NET are great tools to check and validate what the user enters on a web form, before processing it. With the DateValidator control this gap has been filled. User can insert date in a common text box and that’s all: you won’t have to bother about validating their input, the only request is that the date must be in the format dd/mm/yyyy or user defined format.
Let us get in to the code.
A RangeValidatorwould work here to check the date is greater than today:
<asp:RangeValidator ID=”RangeValidator1″ runat=”server” ControlToValidate=”txt_start_date” Display=”None” ErrorMessage=”Date must be greater than today” Type=”Date”></asp:RangeValidator>
<cc1:ValidatorCalloutExtender ID=”ValidatorCalloutExtender4″ runat=”server” Enabled=”True” TargetControlID=”RangeValidator1″></cc1:ValidatorCalloutExtender>
Code Behind:
RangeValidator1.MinimumValue = DateTime.Now.Date.ToString(“dd/MM/yyyy”);
RangeValidator1.MaximumValue = System.DateTime.MaxValue.ToString(“dd/MM/yyyy”);
If you want to do comparison between two dates we can use compare validator:
<asp:CompareValidator ID=”CompareValidator5″ runat=”server” Operator=”GreaterThan” Type=”Date” Display=”None” ErrorMessage=”EndDate must be greater than StartDate” ControlToValidate=”txt_end_date” ControlToCompare=”txt_start_date”></asp:CompareValidator>
<cc1:ValidatorCalloutExtender ID=”ValidatorCalloutExtender5″ runat=”server” Enabled=”True” TargetControlID=”CompareValidator5″> </cc1:ValidatorCalloutExtender>
You can use any (Operator=”GreaterThan” ) like LessThan,Equal ,etc.,
I attached some pieces of image for the reference of output:
Note:
If it is not working add the below line in web.config file under <system.web>
<globalization requestEncoding=”utf-8″ responseEncoding=”utf-8″ culture=”en-GB” uiCulture=”en”/>