String is not valid date time C#

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string d = Request.Form["StartDate"];
DateTime dt = Convert.ToDateTime(d);
 string e = Request.Form["EndDate"];
 DateTime ed = Convert.ToDateTime(e);
objCoupons.EndDate = ed;
objCoupons.StartDate = dt;

this is my code .
the value of d is in format dd/mm/yyyy eg. 10/10/2017.
while converting to date time it throws an error that
when converting strig to datetime parse the string to take date before putting each variable to datetime object.

What I have tried:

i have tried using datetime parse
or another convert thing and invariant culture etc etc

Posted 17-Oct-17 21:28pm

Member 13471452

Updated 17-Oct-17 22:27pm

Thanks7872

v2

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Karthik_Mahalingam · Answer 1 · 2017-10-17T21:40:00

use DateTime.TryParseExact Method (System)[^]

string strDate = "10/10/2017";
         DateTime dtTarget = default(DateTime); // (or) DateTime.MinValue , use this for comparision
         if (DateTime.TryParseExact(strDate, "dd/mm/yyyy", CultureInfo.CurrentCulture, DateTimeStyles.None, out dtTarget))
         {
             // use the  dtTarget object to get the parsed dates
         }
         else {
             // show the error message
         }

Jochen Arndt · Answer 2 · 2017-10-17T21:45:00

If you know that the string is always formatted in a specific format use the DateTime.ParseExact Method (String, String, IFormatProvider) (System)[^] or the DateTime.TryParseExact method.

If you know the culture settings that has been used when creating the string, use one the DateTime.Parse Method (System)[^] or the corresponding TryParse methods that accepts a culture info parameter.

In all other cases it not possible to convert strings to dates.

To avoid date conversion problems store them in binary format whenever possible or use a defined format (fixed or stored/passed as additional argument).

String is not valid date time C#

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