Entityframework Join using join method and lambdas

Question

It seems there are different ways to do joins using linq. One is more straightforward and involves just joining tables like this:

var found = from c in s.cat         


        

Answer 1

You can find a few examples here:

// Fill the DataSet.
DataSet ds = new DataSet();
ds.Locale = CultureInfo.InvariantCulture;
FillDataSet(ds);

DataTable contacts = ds.Tables["Contact"];
DataTable orders = ds.Tables["SalesOrderHeader"];

var query =
    contacts.AsEnumerable().Join(orders.AsEnumerable(),
    order => order.Field("ContactID"),
    contact => contact.Field("ContactID"),
    (contact, order) => new
    {
        ContactID = contact.Field("ContactID"),
        SalesOrderID = order.Field("SalesOrderID"),
        FirstName = contact.Field("FirstName"),
        Lastname = contact.Field("Lastname"),
        TotalDue = order.Field("TotalDue")
    });


foreach (var contact_order in query)
{
    Console.WriteLine("ContactID: {0} "
                    + "SalesOrderID: {1} "
                    + "FirstName: {2} "
                    + "Lastname: {3} "
                    + "TotalDue: {4}",
        contact_order.ContactID,
        contact_order.SalesOrderID,
        contact_order.FirstName,
        contact_order.Lastname,
        contact_order.TotalDue);
}

Or just google for 'linq join method syntax'.