在Windows Mobile 中利用 WebRequest 下载文件并获得响应头的信息信息

点击此处下载源代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;

namespace DownloadFile
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnGet_Click(object sender, EventArgs e)
        {
            Uri u = new Uri(txtUrl.Text);
            Download(u, System.Environment.GetFolderPath(Environment.SpecialFolder.Personal)/* 此处获得我的文档的路径 */);
 
        }

        private void Download(Uri address, string localPath)
        {
            string filename = "test.txt";
            WebRequest request = WebRequest.Create(address);

            //perform the GET request
            WebResponse response = request.GetResponse();

            //get stream containing received data
            Stream s = response.GetResponseStream();

            //open filestream for the output file
            FileStream fs = new FileStream(Path.Combine(localPath, filename), FileMode.Create, FileAccess.Write);

            //copy until all data is read 标准的缓存读取格式
            byte[] buffer = new byte[1024];
            int bytesRead = s.Read(buffer, 0, buffer.Length);
            while (bytesRead > 0)
            {
                fs.Write(buffer, 0, bytesRead);
                bytesRead = s.Read(buffer, 0, buffer.Length);
            }

            //close both streams
            fs.Close();
            s.Close();
            response.Close();

            MessageBox.Show("ok");
        }

        private void btnHead_Click(object sender, EventArgs e)
        {
         
            System.Net.HttpWebRequest hwr = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(txtUrl.Text);
            hwr.Method = "HEAD";
            System.Net.WebResponse response = hwr.GetResponse();
            string[] str = response.Headers.AllKeys;
            foreach (string temp in str)
            {
                this.listBox1.Items.Add("key="+temp+" length="+response.Headers[temp]);
            }
        }

        private void menuItem1_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
    }
}