C# cannot convert int to string

Question

var query = from s in student
            select new ListItem
            {
                ID = s.studentId, 
                Name = s.studentName
            };

When I tried to execute the code I got the error

//Cannot implicitly convert type 'int' (studentId) to 'string' (ID).

Is there anyway I can achieve this?

I think we're missing something here. I don't see ContactId referenced anywhere, and unless ListItem not the ListItem I think it is, it should be new ListItem { Value = s.studentId.ToString(), Text = s.studentName } — moribvndvs
– moribvndvs, Commented Mar 14, 2012 at 6:52

V4Vendetta · Accepted Answer · 2012-03-14 07:08:31Z

1

Since you are using LINQ to Entities ToString won't work for you instead you will have to try out

SqlFunctions.StringConvert((double)s.studentId) //since there is no overload for int

Check this out Sql Functions

answered Mar 14, 2012 at 7:08

V4Vendetta

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Comments

Alexander Yezutov · Accepted Answer · 2012-03-14 08:36:22Z

1

Did you try 'ToString()'?

var studentId = s.studentId.ToString();
var query = from s in student select new ListItem { ID = studentId, Name = s.studentName };

edited Mar 14, 2012 at 8:36

answered Mar 14, 2012 at 6:52

Alexander Yezutov

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1 Comment

chetan Over a year ago

var query = from s in student select new ListItem { ID = s.studentId.ToString(), //Throws exception: ToString is not supported in linq to entities. Name = s.Name }; I have tried this also..

Stefan · Accepted Answer · 2012-03-14 07:06:42Z

0

The ListItem does not contain an ID property. Try using one of its constructors;

var query = from s in student select new ListItem(s.studentName, s.studentId.ToString());

answered Mar 14, 2012 at 7:06

Stefan

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Comments

user1082916 · Accepted Answer · 2012-03-14 07:10:06Z

0

Use Convert.ToString() method.....Convert.ToString(obj) doesn't need to presume the object is not null (as it is a static method on the Convert class), but instead will return String.Empty if it is null.....

 var query = from s in student
                        select new ListItem
                        {
                            ID = Convert.ToString(s.studentId),
                            Name = s.studentName
                        };

answered Mar 14, 2012 at 7:10

user1082916

Comments

Kishore Kumar · Accepted Answer · 2012-03-14 08:53:25Z

0

create a new variable with var type and assign the value of studentid to that vaiable and use the new one in your linq

edited Mar 14, 2012 at 8:53

answered Mar 14, 2012 at 6:59

Kishore Kumar

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2 Comments

chetan Over a year ago

I have tried the following var query = from s in student select new ListItem { ID = s.studentId.ToString(), //Throws exception: ToString is not supported in linq to entities. Name = s.Name };

Kishore Kumar Over a year ago

then declare your ID as string

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