How LINQ works with DataTable
Why we can not query against the DataTable's Rows collection?
I can not find AsEnumerable() in my DataTable
Sample
DataTable Student = new DataTable("Student");
Student.Columns.Add("Name", typeof(String));
Student.Columns.Add("Date", typeof(DateTime));
Student.Columns.Add("NO", typeof(Int32));
Student.Rows.Add(new object[] {"A1",Convert.ToDateTime("2010/01/01"),0});
Student.Rows.Add(new object[] {"A2",Convert.ToDateTime("2011/01/01"),0});
Student.Rows.Add(new object[] {"A3",Convert.ToDateTime("2009/01/01"),1});
Student.Rows.Add(new object[] {"A4",Convert.ToDateTime("2012/01/01"),1});
Student.Rows.Add(new object[] {"A5",Convert.ToDateTime("2011/01/01"),1});
Student.Rows.Add(new object[] {"A6",Convert.ToDateTime("2011/01/01"),2});
Student.Rows.Add(new object[] {"A7",Convert.ToDateTime("2011/01/01"),2});
// Linq Query
var query = from rows
in Student.AsEnumerable()
where rows["NO"].Equals(1)
orderby rows["Date"] descending
select rows;
// A
DataTable result = query.CopyToDataTable();
MessageBox.Show(result.Rows[0][0].ToString());
// B
MessageBox.Show(query.AsDataView()[0][0].ToString());
PS: If you want to use of LINQ to DataSet as ORM you can used of ToQueryable() instead of AsEnumerable().
PS: If you want to use of EF (ADO.NET Entity Framework) as ORM you can directrly use of your Table instead of ToQueryable() or AsEnumerable()
