时在中春，阳和方起。阳和：春天的暖气。有时候，所有风景只为一个路人，或一个路过的人。一如那最初的爱情。
这个是文件下载类：
using System;
using System.IO;
using System.Net;
using System.Web; public class SRWebClient
{
CookieContainer cookie;
public SRWebClient()
{
cookie = new CookieContainer();
} /// <TgData>
/// <Alias>下载Web源代码</Alias>
/// </TgData>
public string DownloadHtml(string URL)
{
HttpWebRequest request = HttpWebRequest.Create(URL) as HttpWebRequest;
request.CookieContainer = cookie;
request.AllowAutoRedirect = false; WebResponse res = request.GetResponse();
string r = ""; StreamReader S1 = new StreamReader(res.GetResponseStream(), System.Text.Encoding.Default);
try
{
r = S1.ReadToEnd();
}
catch (Exception er)
{
Log l = new Log();
l.writelog("下载Web错误", er.ToString());
}
finally
{
res.Close();
S1.Close();
} return r;
} /// <TgData>
/// <Alias>下载文件</Alias>
/// </TgData>
public long DownloadFile(string FileURL, string FileSavePath)
{
long Filelength = 0;
HttpWebRequest req = HttpWebRequest.Create(FileURL) as HttpWebRequest; req.CookieContainer = cookie;
req.AllowAutoRedirect = true; HttpWebResponse res = req.GetResponse() as HttpWebResponse;
System.IO.Stream stream = res.GetResponseStream();
try
{
Filelength = res.ContentLength; byte[] b = new byte[512]; int nReadSize = 0;
nReadSize = stream.Read(b, 0, 512); System.IO.FileStream fs = System.IO.File.Create(FileSavePath);
try
{
while (nReadSize > 0)
{
fs.Write(b, 0, nReadSize);
nReadSize = stream.Read(b, 0, 512);
}
}
finally
{
fs.Close();
}
}
catch (Exception er)
{
Log l = new Log();
l.writelog("下载文件错误", er.ToString());
}
finally
{
res.Close();
stream.Close();
} return Filelength;
} /// <TgData>
/// <Alias>提交数据</Alias>
/// </TgData>
public void Request(string RequestPageURL, RequestData Data)
{
string StrUrl = RequestPageURL;
HttpWebRequest request = HttpWebRequest.Create(StrUrl) as HttpWebRequest;
HttpWebResponse response; string postdata = Data.GetData();
request.Referer = RequestPageURL;
request.AllowAutoRedirect = false;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.01; Windows NT 5.0)";
request.CookieContainer = cookie; Uri u = new Uri(StrUrl); if (postdata.Length > 0) //包含要提交的数据 就使用Post方式
{
//作为表单请求
request.ContentType = "application/x-www-form-urlencoded";
//方式就是Post
request.Method = "POST"; //把提交的数据换成字节数组
Byte[] B = System.Text.Encoding.Default.GetBytes(postdata);
request.ContentLength = B.Length; Stream SW = request.GetRequestStream(); //开始提交数据
SW.Write(B, 0, B.Length);
SW.Close();
} response = request.GetResponse() as HttpWebResponse;
response.Close();
}
}
这个是提交的数据类：
using System.Collections;
using System.IO; public class RequestData
{
ArrayList arr = new ArrayList();
public RequestData()
{ } public string GetData()
{
string r = ""; for (int i = 0; i < arr.Count; i++)
{
data d = (data) arr[i];
if (r.Length > 0)
r += "&";
r += d.Field + "=" + d.Value;
}
return r;
} public void AddField(string Field, string Value)
{
data a = new data();
a.Field = Field;
a.Value = Value; arr.Add(a);
} struct data
{
public string Field, Value;
}
}
代码贴完了，下面是测试代码，因为有些数据涉及到客户的资料，故隐去
using NUnit.Framework; [TestFixture]
public class TestWeb
{
[Test]
public void testDownSEOrder()
{
RequestData data = new RequestData();
data.AddField("name", "abc");
data.AddField("password", "121"); SRWebClient web = new SRWebClient();
web.Request("http://127.0.0.1/login.asp", data); string s = web.DownloadHtml("http://127.0.0.1/dingdan.asp");
System.Console.WriteLine(s);
} [Test]
public void testDownFile()
{
RequestData data = new RequestData();
data.AddField("name", "aaa");
data.AddField("password", "bbb"); SRWebClient web = new SRWebClient();
web.Request("http://127.0.0.1/login.asp", data); web.DownloadFile("http://127.0.0.1/download.asp?fileid=1", @"c:\a.txt");
}
}
本文asp.net 需要登陆的网站上下载网页源代码和文件到此结束。别人赏赐的赞许能够成为一种强大的支配力量。你的价值完全取决于别人的看法，一旦别人不再施舍赞许，你便一无所有，你会觉得自我一文不值。所以，需要赞许是一种负能量，你越是需要得到恭维，就越有可能受到别人的支配。小编再次感谢大家对我们的支持！
