Hi all
I want to validate date in all respect like leap year and date of every month in C#. My format of date is dd/mm/yyyy.

Can anyone help me at this regard.
I have tried with regular expression also but that also is not helpful.

Wat kind of help r u expecting...
Do u need the entire code for the Date function?

Try this:

http://www.eworldui.net/CustomContro...PopupDemo.aspx

Very handy.

Yes i want the entire code or function to validate the date.
I want the user to allowed only valid date i.e he must not be allowed to enter 29th of Feb except leap year or 31 st of any month if the particular month is having only 30 days.
Please reply as soon as possible.

Lily Here is the code in javascript to validate date.Convert to C# and do..

<script language = "Javascript">
/**
 * DHTML date validation script. Courtesy of SmartWebby.com
(http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
         var i;
    for (i = 0; i < s.length; i++){
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
         var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
         // February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 ==
0))) ? 29 : 28 );
}
function DaysArray(n) {
         for (var i = 1; i <= n; i++) {
                  this[i] = 31
                  if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
                  if (i==2) {this[i] = 29}
   }
   return this
}

function isDate(dtStr){
         var daysInMonth = DaysArray(12)
         var pos1=dtStr.indexOf(dtCh)
         var pos2=dtStr.indexOf(dtCh,pos1+1)
         var strMonth=dtStr.substring(0,pos1)
         var strDay=dtStr.substring(pos1+1,pos2)
         var strYear=dtStr.substring(pos2+1)
         strYr=strYear
         if (strDay.charAt(0)=="0" && strDay.length>1)
strDay=strDay.substring(1)
         if (strMonth.charAt(0)=="0" && strMonth.length>1)
strMonth=strMonth.substring(1)
         for (var i = 1; i <= 3; i++) {
                  if (strYr.charAt(0)=="0" && strYr.length>1)
strYr=strYr.substring(1)
         }
         month=parseInt(strMonth)
         day=parseInt(strDay)
         year=parseInt(strYr)
         if (pos1==-1 || pos2==-1){
                  alert("The date format should be : mm/dd/yyyy")
                  return false
         }
         if (strMonth.length<1 || month<1 || month>12){
                  alert("Please enter a valid month")
                  return false
         }
         if (strDay.length<1 || day<1 || day>31 || (month==2 &&
day>daysInFebruary(year)) || day > daysInMonth[month]){
                  alert("Please enter a valid day")
                  return false
         }
         if (strYear.length != 4 || year==0 || year<minYear ||
year>maxYear){
                  alert("Please enter a valid 4 digit year between
"+minYear+" and "+maxYear)
                  return false
         }
         if (dtStr.indexOf(dtCh,pos2+1)!=-1 ||
isInteger(stripCharsInBag(dtStr, dtCh))==false){
                  alert("Please enter a valid date")
                  return false
         }
return true
}

function ValidateForm(){
         var dt=document.frmSample.txtDate
         if (isDate(dt.value)==false){
                  dt.focus()
                  return false
         }
    return true
 }

</script>