sample3.cs

C#函数手册

namespace apiBook
{
	using System;
	using System.Net;
	using System.IO;	
	using System.Text;
	using System.Windows.Forms;
	public class TestWebClientClass 
	{ 
		public static void Main()
		{
			string uriStr = "c:\\test.xml";
			WebClient testWC = new WebClient();
			Console.WriteLine("下载" + uriStr+"的数据");                  
			byte[] testBuffer = testWC.DownloadData (uriStr);
			//使用DownloadData方法从具有指定 URI 的资源下载数据
			string content = Encoding.ASCII.GetString(testBuffer);
			Console.WriteLine(content);
			Console.WriteLine("下载完成。");
			string fnStr = "test.xml";
			string fullPath = null;
			string uriFStr="c:\\";
			testWC = new WebClient();
			fullPath =uriFStr+ fnStr;
			Console.WriteLine("从"+fullPath+"下载文件"+fnStr);
			testWC.DownloadFile(fullPath,fnStr);  
			//使用DownloadFile方法从具有指定 URI 的资源将数据下载到本地文件
			Console.WriteLine("完成从"+fullPath+"下载文件"+fnStr+"的任务。");
			Console.WriteLine("下载的文件存放在目录："+Application.StartupPath);
			Console.Write("使用POST方法将文件"+fullPath+"上传到d:\\");
			testWC=new WebClient();
			uriStr="d:\\";
			Console.WriteLine("上传"+fullPath+"文件到"+uriStr);
			byte[] testA =testWC.UploadFile(uriStr,"POST",fullPath);
			//使用UploadFile方法将本地文件上载到具有指定URI 的资源
			Console.WriteLine("文件上传完成。");
			uriStr = "c:\\test.xml";
			testWC = new WebClient();
			Console.WriteLine("读取"+uriStr+"的内容：");
			Stream testS = testWC.OpenRead(uriStr);
			//使用OpenRead方法为从具有指定 URI 的资源下载的数据打开一个可读的流
			StreamReader reader = new StreamReader(testS);
			Console.WriteLine(reader.ReadToEnd());
			reader.Close();
			string data ="new content";
			testA = Encoding.ASCII.GetBytes(data);
			testWC = new WebClient();
			Console.WriteLine("更新"+uriStr+"内容");
			Console.WriteLine("写入内容为:"+data);    
			testS=testWC.OpenWrite(uriStr,"POST");
			//使用OpenWrite方法打开一个流以将数据写入具有指定 URI 的资源
			testS.Write(testA,0,testA.Length);
			testS.Close();
			Console.WriteLine("数据更新成功。");
			Console.ReadLine();
		}
	}
}