作法：使用與循序結果型式對應的預存程序

這種預存程序可以產生一個以上的結果圖案，但您會知道傳回結果的順序。 將此案例與您不知道傳回順序的案例相比較。 如需詳細資訊，請參閱如何：使用與多個結果型式對應的預存程序。

範例 1

以下是可循序傳回多個結果圖案之預存程序的 T-SQL：

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));
}

<FunctionAttribute(Name:="dbo.MultipleResultTypesSequentially"), _
ResultType(GetType(MultipleResultTypesSequentiallyResult1)), _
ResultType(GetType(MultipleResultTypesSequentiallyResult2))> _
Public Function MultipleResultTypesSequentially() As IMultipleResults
    Dim result As IExecuteResult = Me.ExecuteMethodCall(Me, CType(MethodInfo.GetCurrentMethod, MethodInfo))
    Return CType(result.ReturnValue, IMultipleResults)
End Function

範例 2

您可使用類似下列的程式碼來執行此預存程序。

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);
}

Dim db As New Northwnd("c:\northwnd.mdf")

Dim sprocResults As IMultipleResults = _
    db.MultipleResultTypesSequentially

' First read products.
For Each prod As Product In sprocResults.GetResult(Of Product)()
    Console.WriteLine(prod.ProductID)
Next

' Next read customers.
For Each cust As Customer In sprocResults.GetResult(Of Customer)()
    Console.WriteLine(cust.CustomerID)
Next

另請參閱

• 預存程序