DataServiceQuery<TElement>.IncludeTotalCount 方法
请求将实体集中所有实体的计数与查询结果一起内联返回。
命名空间： System.Data.Services.Client
程序集： Microsoft.Data.Services.Client（在 Microsoft.Data.Services.Client.dll 中）
语法
声明
Public Function IncludeTotalCount As DataServiceQuery(Of TElement)
用法
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>
返回值
类型：System.Data.Services.Client.DataServiceQuery<TElement>
已设置内联计数选项的新 DataServiceQuery<TElement> 对象。
注释
调用 IncludeTotalCount 方法等同于在查询 URI 中包括 $inlinecount 查询选项。
示例
此示例在调用 IncludeTotalCount 方法之后执行查询。 TotalCount 属性用于确定查询返回的实体数量。
' 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);
}