How to: Use Stored Procedures Mapped for Sequential Result Shapes

How to: Use Stored Procedures Mapped for Sequential Result Shapes

.NET Framework (current version)
 

This kind of stored procedure can generate more than one result shape, but you know in what order the results are returned. Contrast this scenario with the scenario where you do not know the sequence of the returns. For more information, see How to: Use Stored Procedures Mapped for Multiple Result Shapes.

Example

Here is the T-SQL of a stored procedure that returns multiple result shapes sequentially:

CREATE PROCEDURE MultipleResultTypesSequentially
AS
select * from products
select * from customers
   [Function(Name="dbo.MultipleResultTypesSequentially")]
[ResultType(typeof(MultipleResultTypesSequentiallyResult1))]
[ResultType(typeof(MultipleResultTypesSequentiallyResult2))]
public IMultipleResults MultipleResultTypesSequentially()
{
	IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())));
	return ((IMultipleResults)(result.ReturnValue));
}

Example

You would use code similar to the following to execute this stored procedure.

Northwnd db = new Northwnd(@"c:\northwnd.mdf");

IMultipleResults sprocResults =
    db.MultipleResultTypesSequentially();

// First read products.
foreach (Product prod in sprocResults.GetResult<Product>())
{
    Console.WriteLine(prod.ProductID);
}

// Next read customers.
foreach (Customer cust in sprocResults.GetResult<Customer>())
{
    Console.WriteLine(cust.CustomerID);
}
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