ISingleResult<T> ISingleResult<T> ISingleResult<T> ISingleResult<T> Interface

Definition

Represents the result of a mapped function that has a single return sequence.

generic <typename T>
public interface class ISingleResult : IDisposable, System::Collections::Generic::IEnumerable<T>, System::Data::Linq::IFunctionResult
public interface ISingleResult<T> : IDisposable, System.Collections.Generic.IEnumerable<T>, System.Data.Linq.IFunctionResult
type ISingleResult<'T> = interface
    interface seq<'T>
    interface IEnumerable
    interface IFunctionResult
    interface IDisposable
Public Interface ISingleResult(Of T)
Implements IDisposable, IEnumerable(Of T), IFunctionResult

Type Parameters

T

The type of the elements in the return sequence.

Implements

Examples

[Function(Name="dbo.Customers By City")]
public ISingleResult<CustomersByCityResult> CustomersByCity([Parameter(DbType="NVarChar(20)")] string param1)
{
    IExecuteResult result = this.ExecuteMethodCall(this,         ((MethodInfo)(MethodInfo.GetCurrentMethod())), param1);
    return ((ISingleResult<CustomersByCityResult>)(result.ReturnValue));
}

// Call the stored procedure.
void ReturnRowset()
{
    Northwnd db = new Northwnd(@"c:\northwnd.mdf");

    ISingleResult<CustomersByCityResult> result =
        db.CustomersByCity("London");

    foreach (CustomersByCityResult cust in result)
    {
        Console.WriteLine("CustID={0}; City={1}", cust.CustomerID,
            cust.City);
    }
}
    <FunctionAttribute(Name:="dbo.Customers By City")> _
        Public Function CustomersByCity(<Parameter(DbType:="NVarChar(20)")> ByVal param1 As String) As ISingleResult(Of CustomersByCityResult)

        Dim result As IExecuteResult = Me.ExecuteMethodCall(Me, CType(MethodInfo.GetCurrentMethod, MethodInfo), param1)
        Return CType(result.ReturnValue, ISingleResult(Of CustomersByCityResult))
    End Function

Sub ReturnRowset()
    ' Call the stored procedure.
    Dim db As New Northwnd("c:\northwnd.mdf")

    Dim result As IEnumerable(Of CustomersByCityResult) = _
        db.CustomersByCity("London")

    For Each cust As CustomersByCityResult In result
        Console.WriteLine("CustID={0}; City={1}", _
            cust.CustomerID, cust.City)
    Next

End Sub

Remarks

The following example represents a stored procedure that returns rows of customers and uses an input parameter to return only those rows that list "London" as the customer city. The example assumes an enumerable CustomersByCityResult class.

CREATE PROCEDURE [dbo].[Customers By City]  
    (@param1 NVARCHAR(20))  
AS  
BEGIN  
    -- SET NOCOUNT ON added to prevent extra result sets from  
    -- interfering with SELECT statements.  
    SET NOCOUNT ON;  
    SELECT CustomerID, ContactName, CompanyName, City from Customers  
        as c where c.City=@param1  
END  

Methods

Dispose() Dispose() Dispose() Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

(Inherited from IDisposable)

GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()

Returns an enumerator that iterates through a collection.

(Inherited from IEnumerable)

Properties

ReturnValue ReturnValue ReturnValue ReturnValue

Gets the return value of a function.

(Inherited from IFunctionResult)

Applies to