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comparision of two textboxes using Dates ... Calendar Extender in

Hello Friends,

am working on ASP.Net Project using C# SqlServer 2005 DB.

on my webpage I have two Textboxes with Calendar Extender with it.

1st Textbox - Issued Date (TxtIssuedDate)
2nd Textbox - Expiry Date (TxtExpiryDate)

Now i want to Compare the two textboxes. If i select Date from Issued Date , AND NEXT
when i Select Expiry date the expiry date must be greater than Issued Date and Todays Date.

so please help me, how to do this.

Thanks in @dvance.
Posted 11-May-13 19:46pm
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Solution 1

validate at the time of submit wheather issue date is greater or not,
bool validate()
if (Datetime.Parse(TxtIssuedDate.text) > Datetime.Parse(TxtExpiryDate.text))
            return false;
return true;
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Solution 2

You can use this javascript
  function CheckValid() {
            var fromDate = $('#<%=txtFromDt.ClientID %>').val();
            var toDate = $('#<%= txtTodt.ClientID %>').val();
            if ((fromDate != "" && toDate != "") && Date.parse(fromDate) > Date.parse(toDate)) {
                // alert("To date should be greater than From date.");
                $('#<%= lblErrorMsg.ClientID %>').text('To date should be greater than From date.');
                return false;

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