Dns.BeginResolve(String, AsyncCallback, Object) 方法
定义
重要
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注意
BeginResolve has been deprecated. Use BeginGetHostEntry instead.
注意
BeginResolve is obsoleted for this type, please use BeginGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202
注意
BeginResolve is obsoleted for this type, please use BeginGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202
开始异步请求，将 DNS 主机名或 IP 地址解析为 IPAddress 实例。
public:
static IAsyncResult ^ BeginResolve(System::String ^ hostName, AsyncCallback ^ requestCallback, System::Object ^ stateObject);[System.Obsolete("BeginResolve has been deprecated. Use BeginGetHostEntry instead.")]
public static IAsyncResult BeginResolve(string hostName, AsyncCallback? requestCallback, object? stateObject);[System.Obsolete("BeginResolve is obsoleted for this type, please use BeginGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")]
public static IAsyncResult BeginResolve(string hostName, AsyncCallback? requestCallback, object? stateObject);[System.Obsolete("BeginResolve is obsoleted for this type, please use BeginGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")]
public static IAsyncResult BeginResolve(string hostName, AsyncCallback requestCallback, object stateObject);[System.Obsolete("BeginResolve is obsoleted for this type, please use BeginGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")]
public static IAsyncResult BeginResolve(string hostName, AsyncCallback requestCallback, object stateObject);public static IAsyncResult BeginResolve(string hostName, AsyncCallback requestCallback, object stateObject);[<System.Obsolete("BeginResolve has been deprecated. Use BeginGetHostEntry instead.")>]
static member BeginResolve : string * AsyncCallback * obj -> IAsyncResult[<System.Obsolete("BeginResolve is obsoleted for this type, please use BeginGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")>]
static member BeginResolve : string * AsyncCallback * obj -> IAsyncResult[<System.Obsolete("BeginResolve is obsoleted for this type, please use BeginGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")>]
static member BeginResolve : string * AsyncCallback * obj -> IAsyncResultstatic member BeginResolve : string * AsyncCallback * obj -> IAsyncResultPublic Shared Function BeginResolve (hostName As String, requestCallback As AsyncCallback, stateObject As Object) As IAsyncResult参数
- hostName
- String
主机的 DNS 名称。
- requestCallback
- AsyncCallback
一个 AsyncCallback 委托，该委托引用在作完成时要调用的方法。
- stateObject
- Object
包含有关操作的信息的用户定义对象。 此作完成后，此对象将传递给 requestCallback 委托。
返回
引用 IAsyncResult 异步请求的实例。
- 属性
例外
hostName 是 null。
调用方无权访问 DNS 信息。
注解
BeginResolve异步作必须通过调用EndResolve该方法来完成。 通常，此方法由 requestCallback 委托调用。
在操作完成之前，此方法不会阻止。 若要在操作完成之前阻止，请使用 Resolve 该方法。
有关使用异步编程模型的详细信息，请参阅 异步调用同步方法。
注释
在应用程序中启用网络跟踪时，此成员会发出跟踪信息。 有关详细信息，请参阅 .NET Framework 中的 Network Tracing。
