Linq query - convert query result to datetime

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In my first query (stringdQuery) I am trying to pass a string date.

C#

var stringQuery = (from p in db.Database_CRE_Events
                   select new Loan()
                   {
                       cDate = p.LastUpdated

                   }).FirstOrDefault();

Then I would like to convert string date from the first query into datetime. This is because, I would use this date in my second query (dateQuery) in where clause which only accepts datetime type field.

C#

if (stringdQuery != null && stringdQuery.cDate.HasValue)
         {
             dtt = Convert.ToDateTime(stringdQuery);

         }

C#

var dateQuery = (from p in db.Database_CRE_Events.Where(c => c.LastUpdated == dtt)
                select new Loan()
                {
                    latest = p.Date

                }).FirstOrDefault();

When I execute this function and on the client-side, I get thrown error – Unable to cast object of type 'STW_V1.Controllers.Loan' to type 'System.IConvertible

Error on the following line:

C#

dtt = Convert.ToDateTime(stringQuery);

Am I missing something in the code?

Apology in advance, if the above explanation is not clear but please feel free to ask any further questions.

Thank you

Posted 14-May-15 4:04am

miss786

Updated 14-May-15 4:05am

v2

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Sascha Lefèvre · Answer 1 · 2015-05-14T04:29:00

There are two problems:

1: stringdQuery is of type Loan. So you're trying to convert a Loan-object to DateTime. But conversion isn't neccessary in the first place - just access the DateTime-value of stringdQuery.cDate by its .Value-property:

C#

dtt = stringdQuery.cDate.Value;

2: I don't know what your intention is here but your two queries don't make much sense to me: You're querying for the first Database_CRE_Event, get its LastUpdated-date and then query for the first Database_CRE_Event whose LastUpdated-date is equal to the former. Which will be the same as from the first query. You could as well select the Date-property in the first place.