HOW TO INSERT NULL VALUE AT DATE TIME FIELD OF DATABASE IN ASP.NET IN DATA ROW METHOD

First of all declare :

STEP :1

object parameterValue;

then

if (!dr.IsNull("Exit_Date"))
        {
            parameterValue = ((DateTime)dr["Exit_Date"]).ToShortDateString();
        }
        else
        {
            parameterValue = DBNull.Value;
        }



this will insert null value in database at datetime field if no value is entered



 object parameterValue;
 if (!dr.IsNull("Exit_Date"))
        {
            parameterValue = ((DateTime)dr["Exit_Date"]).ToShortDateString();
        }
        else
        {
            parameterValue = DBNull.Value;
        }