Querying DataColumnCollection with LINQ

Question

I\'m trying to perform a simple LINQ query on the Columns property of a DataTable:

from c in myDataTable.Columns.AsQueryable()
    select c.ColumnName


        

Answer 1

You could also use:

var x = from DataColumn c in myDataTable.Columns
        select c.ColumnName

It will effectively do the same as Dave's code: "in a query expression, an explicitly typed iteration variable translates to an invocation of Cast(IEnumerable)", according to the Enumerable.Cast<TResult> Method MSDN article.

Answer 2

With Linq Method Syntax:

var x = myDataTable.Columns.Cast<DataColumn>().Select(c => c.ColumnName);

Answer 3

How about:

var x = from c in dt.Columns.Cast<DataColumn>()
        select c.ColumnName;