次の結果ページを取得するために使用する URI を含む DataServiceQueryContinuation<T> オブジェクトを取得します。
名前空間: System.Data.Services.Client
アセンブリ: Microsoft.Data.Services.Client (Microsoft.Data.Services.Client.dll)
構文
'宣言
Public Function GetContinuation As DataServiceQueryContinuation(Of T)
'使用
Dim instance As QueryOperationResponse
Dim returnValue As DataServiceQueryContinuation(Of T)
returnValue = instance.GetContinuation()
public DataServiceQueryContinuation<T> GetContinuation()
public:
DataServiceQueryContinuation<T>^ GetContinuation()
member GetContinuation : unit -> DataServiceQueryContinuation<'T>
public function GetContinuation() : DataServiceQueryContinuation<T>
戻り値
型: System.Data.Services.Client.DataServiceQueryContinuation<T>
次の結果ページを返すために使用する URI を含むオブジェクト。
使用例
次の例は、do...while ループで GetContinuation メソッドを使用して、データ サービスからのページングされた結果の Customers エンティティを読み込みます。
' Create the DataServiceContext using the service URI.
Dim context = New NorthwindEntities(svcUri)
Dim token As DataServiceQueryContinuation(Of Customer) = Nothing
Dim pageCount = 0
Try
' Execute the query for all customers and get the response object.
Dim response As QueryOperationResponse(Of Customer) = _
CType(context.Customers.Execute(), QueryOperationResponse(Of Customer))
' With a paged response from the service, use a do...while loop
' to enumerate the results before getting the next link.
Do
' Write the page number.
Console.WriteLine("Page {0}:", pageCount + 1)
' If nextLink is not null, then there is a new page to load.
If token IsNot Nothing Then
' Load the new page from the next link URI.
response = CType(context.Execute(Of Customer)(token), _
QueryOperationResponse(Of Customer))
End If
' Enumerate the customers in the response.
For Each customer As Customer In response
Console.WriteLine(vbTab & "Customer Name: {0}", customer.CompanyName)
Next
' Get the next link, and continue while there is a next link.
token = response.GetContinuation()
Loop While token IsNot Nothing
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);
DataServiceQueryContinuation<Customer> token = null;
int pageCount = 0;
try
{
// Execute the query for all customers and get the response object.
QueryOperationResponse<Customer> response =
context.Customers.Execute() as QueryOperationResponse<Customer>;
// With a paged response from the service, use a do...while loop
// to enumerate the results before getting the next link.
do
{
// Write the page number.
Console.WriteLine("Page {0}:", pageCount++);
// If nextLink is not null, then there is a new page to load.
if (token != null)
{
// Load the new page from the next link URI.
response = context.Execute<Customer>(token)
as QueryOperationResponse<Customer>;
}
// Enumerate the customers in the response.
foreach (Customer customer in response)
{
Console.WriteLine("\tCustomer Name: {0}", customer.CompanyName);
}
}
// Get the next link, and continue while there is a next link.
while ((token = response.GetContinuation()) != null);
}
catch (DataServiceQueryException ex)
{
throw new ApplicationException(
"An error occurred during query execution.", ex);
}