how to get current date value using linq query?

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Hi,

I am trying to call the following linq query to display latest date value but currently i keep experiencing compiling error:
API_09.Controllers.DateStampController.GetDate()': not all code paths return a value

C#

public IEnumerable<database_BD> GetDate()
        {

            var data = (from c in db.database_BD
                        select new
                        {
                            c.UploadDate

                        }).OrderByDescending(c => c.UploadDate).Take(1).ToList();

           //return data;

        }

if add in the return line, it shows another compiling error.
Please help. Is my approach to query is incorrect?

Thanks in advance.

Posted 13-Apr-14 23:37pm

miss786

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Sanket Saxena 14-Apr-14 5:45am

whats the error when you return the value coz it must.

miss786 14-Apr-14 5:50am

Thanks for your response. when I add the 'return data' i get:

Cannot implicitly convert type 'System.Collections.Generic.List<anonymoustype#1>' to 'System.Collections.Generic.IEnumerable<######>'. An explicit conversion exists (are you missing a cast?) -- error.

3 solutions

Solution 2

I think you are not using the select new properly also need to use ToList() then apply OrderBy

Try below:

C#

public IEnumerable<database_bd> GetDate()
        {
 
            var data = (from c in db.database_BD
                        select new 
                        {
                            UploadDate=c.UploadDate
 
                        }).ToList().OrderByDescending(c => c.UploadDate).Take(1);
 
           return data;
 
        }

Posted 14-Apr-14 0:00am

Sanket Saxena

Updated 14-Apr-14 0:01am

v3

Comments

miss786 14-Apr-14 6:11am

hi, I am really sorry for to inform, i already tried using toList(), as above and it gives the same old error:

Cannot implicitly convert type 'System.Collections.Generic.List<anonymoustype#1>' to 'System.Collections.Generic.IEnumerable<######>'. An explicit conversion exists (are you missing a cast?) -- error.

Sanket Saxena 14-Apr-14 6:18am

Then the problem is in var data. Could you remove it and take a IEnumerable/List Type

Solution 1

please try this one....

public IEnumerable<database_BD> GetDate()
        {
 
            var data = (from c in db.database_BD
                        select new database_BD()
                        {
                            c.UploadDate
 
                        }).OrderByDescending(c => c.UploadDate).Take(1).ToList();
 
           return data;

        }

Posted 13-Apr-14 23:50pm

abhishek_singh

Comments

miss786 14-Apr-14 5:54am

Many thanks for your solution, but I am sorry to inform, I am getting another error -- Cannot initialize type 'API_09.database_BD' with a collection initializer because it does not implement 'System.Collections.IEnumerable'.

abhishek_singh 14-Apr-14 6:17am

what is the type of database_BD, It must be entity of Updatedate type, make sure about that, because if this is another type entity then it can not convert to that format.

abhishek_singh 14-Apr-14 6:23am

please go through below solution 3

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abhishek_singh · Accepted Answer · 2014-04-14T00:21:00

please try complete code

public IEnumerable<database_BD> GetDate()
        {
 
            IEnumerable<database_BD> data = (from c in db.database_BD
                        select new database_BD()
                        {
                            UploadDate = c.UploadDate
 
                        }).OrderByDescending(c => c.UploadDate).Take(1).ToList();
 
           return data;
 
        }

C#

public class database_BD
       {
           public datetime UploadDate{ get; set; }           
       }

how to get current date value using linq query?

3 solutions

Solution 2

Solution 1

Solution 3

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