WebClient Constructor ()

 

Initializes a new instance of the WebClient class.

Namespace:   System.Net
Assembly:  System (in System.dll)

Public Sub New

The default constructor creates a new instance of the WebClient class. The default HTTP method is GET. The default FTP method is RETR. The default Encoding is Default. The default value of AllowAutoRedirect is true.

The following code example creates a WebClient instance and then uses it to download data from a server and display it on the system console, to download data from a server and write it to a file, and to upload form values to a server and receive the response.

Public Shared Sub Main()


    Try
        Dim client As New WebClient()
        Dim pageData As [Byte]() = client.DownloadData("http://www.contoso.com")
        Dim pageHtml As String = Encoding.ASCII.GetString(pageData)

        ' Download the data to a buffer.
        Console.WriteLine(pageHtml)

        ' Download the data to a file.
        client.DownloadFile("http://www.contoso.com", "page.htm")


        ' Upload some form post values.
        dim form as New NameValueCollection()
  form.Add("MyName", "MyValue")  

  ' Note that you need to replace "http://localhost/somefile.aspx" with the name of 
  ' a file that is available to your computer.
  Dim responseData As [Byte]() = client.UploadValues("http://www.contoso.com/form.aspx", form)      
        Console.WriteLine(Encoding.ASCII.GetString(responseData))

    Catch webEx As WebException
        if webEx.Status = WebExceptionStatus.ConnectFailure then
           Console.WriteLine("Are you behind a firewall?  If so, go through the proxy server.")
        end if
        Console.Write(webEx.ToString())
    End Try


End Sub 'Main

.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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