WebClient.OpenReadCompleted 事件

定義

命名空間:

System.Net

組件:

System.Net.WebClient.dll

組件:

System.dll

組件:

netstandard.dll

在開啟包含資源之資料流的非同步作業完成時發生。

public:
 event System::Net::OpenReadCompletedEventHandler ^ OpenReadCompleted;

public event System.Net.OpenReadCompletedEventHandler? OpenReadCompleted;

public event System.Net.OpenReadCompletedEventHandler OpenReadCompleted;

member this.OpenReadCompleted : System.Net.OpenReadCompletedEventHandler 

Public Custom Event OpenReadCompleted As OpenReadCompletedEventHandler 

Public Event OpenReadCompleted As OpenReadCompletedEventHandler 

事件類型

OpenReadCompletedEventHandler

範例

下列程式碼範例示範如何設定此事件的事件處理常式。

void OpenResourceForReading2( String^ address )
{
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);

   client->OpenReadCompleted += gcnew OpenReadCompletedEventHandler( OpenReadCallback2 );
   client->OpenReadAsync( uri );
}

public static void OpenResourceForReading2(string address)
{
    WebClient client = new WebClient();
    Uri uri = new Uri(address);

    client.OpenReadCompleted += new OpenReadCompletedEventHandler(OpenReadCallback2);
    client.OpenReadAsync(uri);
}

Public Shared Sub OpenResourceForReading2(ByVal address As String)

    Dim client As WebClient = New WebClient()
    AddHandler client.OpenReadCompleted, AddressOf OpenReadCallback2
                Dim uri as Uri = New Uri(address)
    client.OpenReadAsync(uri)
End Sub

備註

每次開啟包含資源之資料流程的非同步作業時，都會引發此事件。 這些作業會藉由呼叫 OpenReadAsync 方法來啟動。

OpenReadCompletedEventHandler是這個事件的委派。 類別 OpenReadCompletedEventArgs 會提供事件處理常式與事件資料。

如需如何處理事件的詳細資訊，請參閱 處理和引發事件。