Updated changes not saving to database table

I have not given like  

 

i have given like

and after context.Savechanges();

write below code

var query = (from n in context.Notifications where n.MemberID == memberId && n.NotificationID == NotificationId && n.IsRead == false select new NotificationData { NotificationID = n.NotificationID, Message = n.Message, CreatedTime = n.NotificationTime, IsRead = nd.IsRead });
return query.ToList(); 

Please Check the code properly...and implement it.

if still there any issue then please lets discuss with me 

Yes I am using our code  but it show an error  like this

 

 

Error 17 Cannot implicitly convert type 'System.Collections.Generic.List' to 'Kiwi.Service.Model.NotificationData' D:\26-09-2015\service\Kiwi.Service.DL\DataAccess.cs 244 21 Kiwi.Service.DL

 

Do like this

nd=context.NotificationData.where(m=>m.NotificationId==NotificdationId).FirstOrDefault();
nd.IsRead = true;
context.SaveChanges(); 

}

 

} 

 

 This is my table columns

can u please post Your table columns here?

just write

Like

 nd.IsRead = true;

context.SaveChanges(); 

 

and check once

I am updated IsRead column when IsRead is False then true when i call this api like this :

 

 

 

Then IsRead column is updated with true (1).

 

 

When You Are Returning the list before that You need to write Savechanges.because though You are assigning the value you are not saving data(i.e context.Savechages()).One More Thing i want to ask.Which record You are updating(i.e On The Basis Of Which reference)as I am Looking To Your Code ,You Are Not fetching Any record By Id Or By any Column From The Table.