DataServiceQueryContinuation<T> 類別

定義

命名空間:

System.Data.Services.Client

組件:

System.Data.Services.Client.dll

封裝 URI，該 URI 會傳回分頁 WCF Data Services 查詢結果的下一頁。

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

類型參數

T

接續語彙基元的型別。

繼承

Object

DataServiceQueryContinuation

DataServiceQueryContinuation<T>

範例

本範例使用 do…while 迴圈，從資料服務的分頁結果載入 Customers 實體。

// 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

屬性

NextLinkUri

取得用於從分頁式查詢結果傳回下一頁資料的 URI。 (繼承來源 DataServiceQueryContinuation)

方法

Equals(Object)	判斷指定的物件是否等於目前的物件。 (繼承來源 Object)
GetHashCode()	做為預設雜湊函式。 (繼承來源 Object)
GetType()	取得目前執行個體的 Type。 (繼承來源 Object)
MemberwiseClone()	建立目前 Object 的淺層複製。 (繼承來源 Object)
ToString()	傳回下一個連結 URI 做為字串。 (繼承來源 DataServiceQueryContinuation)

另請參閱

• 載入延後內容 (WCF 資料服務)