DataServiceQuery<TElement>.IncludeTotalCount 方法
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
要求實體集中的所有實體計數以內嵌在查詢結果中的方式傳回。
public:
System::Data::Services::Client::DataServiceQuery<TElement> ^ IncludeTotalCount();
public System.Data.Services.Client.DataServiceQuery<TElement> IncludeTotalCount ();
member this.IncludeTotalCount : unit -> System.Data.Services.Client.DataServiceQuery<'Element>
Public Function IncludeTotalCount () As DataServiceQuery(Of TElement)
傳回
已設定內嵌計數選項的新 DataServiceQuery<TElement> 物件。
範例
此範例會在呼叫 IncludeTotalCount 方法後執行查詢。 TotalCount 屬性是用於判斷查詢傳回的實體數目。
// 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);
}
' 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
備註
IncludeTotalCount呼叫 方法相當於在$inlinecount
查詢 URI 中包含查詢選項。