DataServiceQueryContinuation<T> クラス

定義

名前空間:

System.Data.Services.Client

アセンブリ:

System.Data.Services.Client.dll

ページングされた WCF Data Services クエリ結果の次のページを返す URI をカプセル化します。

generic <typename T>
public ref class DataServiceQueryContinuation sealed : System::Data::Services::Client::DataServiceQueryContinuation

public sealed class DataServiceQueryContinuation<T> : System.Data.Services.Client.DataServiceQueryContinuation

type DataServiceQueryContinuation<'T> = class
    inherit DataServiceQueryContinuation

Public NotInheritable Class DataServiceQueryContinuation(Of T)
Inherits DataServiceQueryContinuation

型パラメーター

T

継続トークンの種類。

継承

Object

DataServiceQueryContinuation

DataServiceQueryContinuation<T>

例

次の例は、do…while ループを使用して、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.
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);
}

' 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

プロパティ

NextLinkUri

ページングされたクエリ結果からデータの次のページを返すために使用する URI を取得します。 (継承元 DataServiceQueryContinuation)

メソッド

Equals(Object)	指定されたオブジェクトが現在のオブジェクトと等しいかどうかを判断します。 (継承元 Object)
GetHashCode()	既定のハッシュ関数として機能します。 (継承元 Object)
GetType()	現在のインスタンスの Type を取得します。 (継承元 Object)
MemberwiseClone()	現在の Object の簡易コピーを作成します。 (継承元 Object)
ToString()	次のリンク URI を文字列として返します。 (継承元 DataServiceQueryContinuation)

こちらもご覧ください

• 遅延コンテンツの読み込み (WCF Data Services)