vb.net下载数据

              public function downloaddata( byval address as string ) as byte()

接受一个参数，address是从中下载数据的 uri。注意返回的是一个字节数组，我在以前的文章中提到过很多次，我们可以很简单的转换为我们需要的格式。

       看一个代码：

       dim wc as new system.net.webclient() ‘跟网络相关的类一般都在system.net下

dim html as string = encoding.ascii.getstring(wc.downloaddata("http:www.csdn.net"))

debug.writeline(html)

public sub downloadfile( byval address as string, byval filename as string )

使用也很简单：

        dim wc as new system.net.webclient()

wc.downloadfile("/xrssfile/2006-12/26/2006122602354452.gif")

成功运行后，本地机的c:/会多出一个小图片，就是vs.net 4cd的广告。

dim mywebclient as new system.net.webclient()

dim uristring as string="http://www.csdn.net"

console.writeline("accessing {0} ...", uristring)

dim mystream as stream = mywebclient.openread(uristring)

console.writeline(controlchars.cr + "displaying data :" + controlchars.cr)

dim sr as new streamreader(mystream)

console.writeline(sr.readtoend())

mystream.close()