How do I...remove ISDate error

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This is my code and i have a query that an error is coming "System.Convert doesnot contain defination for Isdate". How to remove this error.

C#

public bool page_IsValid()
   {
       bool result = true;

       if ((!Convert.IsDate(Request["start_date"])) | (!Convert.IsDate(Request["end_date"])))
       {
           result = false;
       }
       else
       {
           if (Convert.ToDateTime(Request["start_date"]) > Convert.ToDateTime(Request["end_date"]))
               result = false;
       }
       return result;
   }

Posted 10-Jun-15 23:24pm

Member 11758222

Updated 10-Jun-15 23:32pm

DamithSL

v2

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CHill60 · Answer 1 · 2015-06-10T23:44:00

Solution 1

Use DateTime.TryParse[^] instead.

Posted 10-Jun-15 23:44pm

CHill60

Comments

Member 11758222 11-Jun-15 5:56am

where i should use this? I have used this instead of IsDate. But still it is not accepting

CHill60 11-Jun-15 6:13am

See DamithSL's amended solution

DamithSL · Answer 2 · 2015-06-10T23:46:00

Solution 2

there is no Convert.IsDate, try as below

C#

public bool page_IsValid()
{
   DateTime start;
   DateTime end;
   return DateTime.TryParse(Request["start_date"], out start) && DateTime.TryParse(Request["end_date"], out end)
         && end>=start;
}

Posted 10-Jun-15 23:46pm

DamithSL

Updated 11-Jun-15 0:03am

v2

Comments

Member 11758222 11-Jun-15 6:01am

How to use it?

DamithSL 11-Jun-15 6:03am

check my updated answer