DataServiceQuery<TElement>.IncludeTotalCount 方法
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。
命名空間： System.Data.Services.Client
組件： Microsoft.Data.Services.Client (在 Microsoft.Data.Services.Client.dll 中)
語法
'宣告
Public Function IncludeTotalCount As DataServiceQuery(Of TElement)
'用途
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>
傳回值
型別：System.Data.Services.Client.DataServiceQuery<TElement>
已設定內嵌計數選項的新 DataServiceQuery<TElement> 物件。
備註
呼叫 IncludeTotalCount 方法等同於將 $inlinecount 查詢選項包含在查詢 URI 中。
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.
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);
}