UploadStringCompletedEventArgs 类

定义

命名空间:

System.Net

程序集:

System.Net.WebClient.dll

Source:

WebClient.cs

为 UploadStringCompleted 事件提供数据。

public ref class UploadStringCompletedEventArgs : System::ComponentModel::AsyncCompletedEventArgs

public class UploadStringCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs

type UploadStringCompletedEventArgs = class
    inherit AsyncCompletedEventArgs

Public Class UploadStringCompletedEventArgs
Inherits AsyncCompletedEventArgs

继承

Object

EventArgs

AsyncCompletedEventArgs

UploadStringCompletedEventArgs

示例

下面的代码示例演示如何异步上传字符串。

void UploadStringInBackground2( String^ address )
{
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);
   String^ data = "Time = 12:00am temperature = 50";

   client->UploadStringCompleted += gcnew UploadStringCompletedEventHandler( UploadStringCallback2 );
   client->UploadStringAsync( uri, data );
}

public static void UploadStringInBackground2(string address)
{
    WebClient client = new WebClient();
    Uri uri = new Uri(address);
    string data = "Time = 12:00am temperature = 50";
    client.UploadStringCompleted += new UploadStringCompletedEventHandler(UploadStringCallback2);
    client.UploadStringAsync(uri, data);
}

Public Shared Sub UploadStringInBackground2(ByVal address As String)

    Dim client As WebClient = New WebClient()
    Dim data As String = "Time = 12:00am temperature = 50"
    AddHandler client.UploadStringCompleted, AddressOf UploadStringCallback2
                Dim uri as Uri = New Uri(address)
    client.UploadStringAsync(uri, data)
End Sub

上传完成后，将调用以下方法。

void UploadStringCallback2( Object^ /*sender*/, UploadStringCompletedEventArgs^ e )
{
   String^ reply = dynamic_cast<String^>(e->Result);
   Console::WriteLine( reply );
}

private static void UploadStringCallback2(Object sender, UploadStringCompletedEventArgs e)
{
    string reply = (string)e.Result;
    Console.WriteLine(reply);
}

Private Shared Sub UploadStringCallback2(ByVal sender As Object, ByVal e As UploadStringCompletedEventArgs)
    Dim reply As String = CStr(e.Result)
    Console.WriteLine(reply)
End Sub

注解

此类的实例将传递给 UploadStringCompletedEventHandler。

属性

Cancelled	获取一个值，该值指示异步操作是否已被取消。 (继承自 AsyncCompletedEventArgs)
Error	获取一个值，该值指示异步操作期间发生的错误。 (继承自 AsyncCompletedEventArgs)
Result	获取通过调用 UploadStringAsync 方法启动的字符串上载操作的服务器回复。
UserState	获取异步任务的唯一标识符。 (继承自 AsyncCompletedEventArgs)

方法

Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
RaiseExceptionIfNecessary()	如果异步操作失败，则引发用户提供的异常。 (继承自 AsyncCompletedEventArgs)
ToString()	返回表示当前对象的字符串。 (继承自 Object)