Question

I use Asp.net 3.5 and EF 4.

I need find a specific row in my DataBase and display on a label a single value as string.

At the moment I use this code, it is working, so I find a single Object and read its properties.

 var myAuthor = (from at in context.CmsAuthors
             where at.AuthorId == myRow.AuthorId
             select at).Single();   
 myAuthorNameLabel.Text = myAuthor.LastName;

I would like to know:

• If there is another syntax in Linq to achieve the same result.
• How to do it using Lamba?
• Which approach would you suggest me?

Answer 1

You can use:

 var myAuthorName = 
(from at in context.CmsAuthors where at.AuthorId == myRow.AuthorId select at).Single().Select(a => a.LastName);

actually this would be even better:

var myAuthorName = 
(from at in context.CmsAuthors where at.AuthorId == myRow.AuthorId select at).Select(a => a.LastName).Single();

Update

An example of how to use with Anonymous type:

var myAuthorNames = 
    (from at in context.CmsAuthors where at.AuthorId == myRow.AuthorId select at).Select( a => new {a.LastName, a.FirstName}).Single();