help !! how to update record having int data type

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C#

public void upd()
        {
            amritEntities context = new amritEntities();
            IEnumerable<timesheet> list = from v in context.Timesheets
                                          where v.projectid = 5
                                          select v;
            foreach (var v in list)
            {
                v.projectid = Convert.ToInt32(5 + 2);
            }
            context.SaveChanges();
        }
}
}

errors while build

Error   1   Cannot convert lambda expression to type 'string' because it is not a delegate type C:\Users\user\documents\visual studio 2010\Projects\ConsoleApplication49\ConsoleApplication49\Class3.cs 15  43  ConsoleApplication49
Error   3   Cannot implicitly convert type 'int?' to 'bool' C:\Users\user\documents\visual studio 2010\Projects\ConsoleApplication49\ConsoleApplication49\Class3.cs 15  49  ConsoleApplication49
Error   2   Delegate 'System.Func<ConsoleApplication49.Timesheet,int,bool>' does not take 1 arguments   C:\Users\user\documents\visual studio 2010\Projects\ConsoleApplication49\ConsoleApplication49\Class3.cs 15  43  ConsoleApplication49

Posted 26-Aug-14 18:50pm

Member 10879484

Updated 26-Aug-14 19:04pm

PIEBALDconsult

v2

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Comments

Prasad Avunoori 27-Aug-14 0:58am

What do you mean by this v.projectid = Convert.ToInt32(5 + 2);? Why are you mentioning 5+2?

Member 10879484 27-Aug-14 1:04am

add +2 on the record

Prasad Avunoori 27-Aug-14 1:06am

What is the use of adding 2 to 5 every time?

Prasad Avunoori 27-Aug-14 1:10am

I think you are supposed to convert from v in context.Timesheets
where v.projectid = 5
select v; to a list
like below.

(from v in context.Timesheets
where v.projectid = 5
select v).ToList();

PIEBALDconsult 27-Aug-14 1:06am

What's the point of the Convert.ToInt32 ? 5 + 2 is already an Int32.

Member 10879484 27-Aug-14 1:18am

yes scratch convert.toint32

Member 10879484 27-Aug-14 1:18am

all i want to do is updation of records. part of crud methods

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Raul Iloc · Answer 1 · 2014-08-26T19:20:00

1.You must use constants values from the same type as your properties from Timesheets entity class are expected to be;

2.So you have to look on the generated source code of your Timesheets class for the property projectid, and if its type is string you should use string values in your code like in the next example:

C#

            IEnumerable<timesheet> list = from v in context.Timesheets
                                          where v.projectid = "5"                                                    
                                          select v;
</timesheet>

3.Based on the info that your projectid is an int you should change your code like this:

C#

public void upd()
        {
            amritEntities amritEntities context = new amritEntities()
            //
            //Build your query
            IQueryable<timesheet> list = from v in context.Timesheets
                                          where v.projectid = 5
                                          select v;
            //
            // Run the query ==> the results
            List<timesheet> resultList = list.ToList();
            //
            //Modify the IDs.
            foreach (timesheet item in resultList )
            {
                item.projectid = 7;
             }
            //
            //Save the changes 
            context.SaveChanges();
        }
}