通过

UploadDataCompletedEventArgs 类

定义

命名空间:
System.Net
程序集:
netstandard.dll, System.Net.WebClient.dll
程序集:
System.Net.WebClient.dll
程序集:
System.dll
程序集:
netstandard.dll
Source:
WebClient.cs
Source:
WebClient.cs
Source:
WebClient.cs
Source:
WebClient.cs

为 UploadDataCompleted 事件提供数据。

public ref class UploadDataCompletedEventArgs : System::ComponentModel::AsyncCompletedEventArgs
public class UploadDataCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs
type UploadDataCompletedEventArgs = class
    inherit AsyncCompletedEventArgs
Public Class UploadDataCompletedEventArgs
Inherits AsyncCompletedEventArgs
继承
Object
EventArgs
AsyncCompletedEventArgs
UploadDataCompletedEventArgs

示例

下面的代码示例演示如何异步上传数据。

public static void UploadDataInBackground2(string address)
{
    WebClient client = new WebClient();
    Uri uri = new Uri(address);
    string text = "Time = 12:00am temperature = 50";
    byte[] data = System.Text.Encoding.UTF8.GetBytes(text);
    string method = "POST";

    client.UploadDataCompleted += new UploadDataCompletedEventHandler(UploadDataCallback2);
    client.UploadDataAsync(uri, method, data);
}

Public Shared Sub UploadDataInBackground2(ByVal address As String)

    Dim client As WebClient = New WebClient()
    Dim text As String = "Time = 12:00am temperature = 50"
    Dim data() As Byte = System.Text.Encoding.UTF8.GetBytes(text)
    Dim method As String = "POST"

    AddHandler client.UploadDataCompleted, AddressOf UploadDataCallback2
    Dim uri as Uri = New Uri(address)
                client.UploadDataAsync(uri, method, data)
End Sub

上传完成后，将调用以下方法。

private static void UploadDataCallback2(Object sender, UploadDataCompletedEventArgs e)
{
    byte[] data = (byte[])e.Result;
    string reply = System.Text.Encoding.UTF8.GetString(data);

    Console.WriteLine(reply);
}

Private Shared Sub UploadDataCallback2(ByVal sender As Object, ByVal e As UploadDataCompletedEventArgs)

    Dim data() As Byte = CType(e.Result, Byte())
    Dim reply As String = System.Text.Encoding.UTF8.GetString(data)

    Console.WriteLine(reply)
End Sub

注解

此类的实例将传递给 UploadDataCompletedEventHandler。

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 UploadDataAsync 方法启动的数据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)

适用于