C# - How do I fill a DataSet or a DataTable from a LINQ query resultset?

How do you expose a LINQ query as an ASMX web service? Usually, from the business tier, I can return a typed DataSet or DataTable which can be serialized for transport over ASMX.

How can I do the same for a LINQ query? Is there a way to populate a typed DataSet or DataTable via a LINQ query?: 

public static MyDataTable CallMySproc()    
{    
    string conn = ...;

    MyDatabaseDataContext db = new MyDatabaseDataContext(conn);    
    MyDataTable dt = new MyDataTable();

    // execute a sproc via LINQ
    var query = from dr in db.MySproc().AsEnumerable
    select dr;

    // copy LINQ query resultset into a DataTable -this does not work !    
    dt = query.CopyToDataTable();

    return dt;
}

How can I get the resultset of a LINQ query into a DataSet or DataTable? Alternatively, is the LINQ query serializeable so that I can expose it as an ASMX web service?

This question and answers originated from www.stackoverflow.com
Question by (8/1/2008 4:59:33 AM)

Answer

As mentioned in the question, IEnumerable has a CopyToDataTable method:

IEnumerable<DataRow> query =
    from order in orders.AsEnumerable()
    where order.Field<DateTime>("OrderDate") > new DateTime(2001, 8, 1)
    select order;

// Create a table from the query.
DataTable boundTable = query.CopyToDataTable<DataRow>();

Why won't that work for you?

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Related Topics  c#  linq  web-services  .net-3.5
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