DataServiceQuery<TElement>.IncludeTotalCount-Methode

Fordert an, dass die Anzahl aller Entitäten in der Entitätenmenge inline mit den Abfrageergebnissen zurückgegeben wird.

Namespace:  System.Data.Services.Client
Assembly:  Microsoft.Data.Services.Client (in Microsoft.Data.Services.Client.dll)

Syntax

'Declaration
Public Function IncludeTotalCount As DataServiceQuery(Of TElement)
'Usage
Dim instance As DataServiceQuery
Dim returnValue As DataServiceQuery(Of TElement)

returnValue = instance.IncludeTotalCount()

public DataServiceQuery<TElement> IncludeTotalCount()

public:
DataServiceQuery<TElement>^ IncludeTotalCount()

member IncludeTotalCount : unit -> DataServiceQuery<'TElement> 

public function IncludeTotalCount() : DataServiceQuery<TElement>

Rückgabewert

Typ: System.Data.Services.Client.DataServiceQuery<TElement>
Ein neues DataServiceQuery<TElement>-Objekt, für das die Inlineanzahloption festgelegt ist.

Hinweise

Das Aufrufen der Methode IncludeTotalCount entspricht dem Aufnehmen der Abfrageoption $inlinecount in den Abfrage-URI.

Beispiele

In diesem Beispiel wird eine Abfrage ausgeführt, nachdem die IncludeTotalCount-Methode aufgerufen wurde. Mit der Eigenschaft TotalCount wird die Anzahl der Entitäten ermittelt, die von der Abfrage zurückgegeben wurde.

' Create the DataServiceContext using the service URI.
Dim context = New NorthwindEntities(svcUri)

' Define a new query for Customers that includes the total count.
Dim query As DataServiceQuery(Of Customer) = _
context.Customers.IncludeTotalCount()

Try
    ' Execute the query for all customers and get the response object.
    Dim response As QueryOperationResponse(Of Customer) = _
        CType(query.Execute(), QueryOperationResponse(Of Customer))

    ' Retrieve the total count from the response.
    Console.WriteLine("There are a total of {0} customers.", response.TotalCount)

    ' Enumerate the customers in the response.
    For Each customer As Customer In response
        Console.WriteLine(vbTab & "Customer Name: {0}", customer.CompanyName)
    Next
Catch ex As DataServiceQueryException
    Throw New ApplicationException( _
            "An error occurred during query execution.", ex)
End Try

// Create the DataServiceContext using the service URI.
NorthwindEntities context = new NorthwindEntities(svcUri);

// Define a new query for Customers that includes the total count.
DataServiceQuery<Customer> query = context.Customers.IncludeTotalCount();

try
{    
    // Execute the query for all customers and get the response object.
    QueryOperationResponse<Customer> response = 
        query.Execute() as QueryOperationResponse<Customer>;

    // Retrieve the total count from the response.
    Console.WriteLine("There are a total of {0} customers.", response.TotalCount);

    // Enumerate the customers in the response.
    foreach (Customer customer in response)
    {
        Console.WriteLine("\tCustomer Name: {0}", customer.CompanyName);
    }
}
catch (DataServiceQueryException ex)
{
    throw new ApplicationException(
        "An error occurred during query execution.", ex);
}

Siehe auch

Verweis

DataServiceQuery<TElement> Klasse

System.Data.Services.Client-Namespace