[1]從網頁上下載圖片

namespace 下載圖片

{

class Program

{

static void Main(string[] args)

{

WebClient wc = new WebClient();

wc.Encoding = Encoding.Default;

string webAddress = "http://localhost:8080/美女圖片/美女們.htm";

string strRegex = " <img alt=\"\" src=\"(.+)\" />";

string path = "E:\\test\\";

MatchCollection mat = GetWebInfo(wc, webAddress, strRegex);

foreach (Match item in mat)

{

if (item.Success)

{

//拼接出圖片在網絡上的的真實路徑

string realImgAddress = "http://localhost:8080/美女圖片/" + item.Groups[1].Value;

string localpath = path + Path.GetFileName(item.Groups[1].Value);

wc.DownloadFile(realImgAddress, localpath);

}

}

Console.WriteLine("OK");

Console.ReadKey();

}

public static MatchCollection GetWebInfo(WebClient wc, string webAddress, string strRegex)

{

//獲得圖片所在網頁的html的字符串

string html = wc.DownloadString(webAddress);

//通過匹配獲得網頁標簽中圖片的鏈接地址

Regex regex = new Regex(strRegex);

MatchCollection mat = regex.Matches(html);

return mat;

}

}

}

?

[2]從網頁提取郵箱

namespace 網頁提取郵箱2

{

class Program

{

static void Main(string[] args)

{

WebClient wc = new WebClient();

wc.Encoding = Encoding.Default;

string webAddress = "http://localhost:8080/提取Email.htm";

string strRegex = @"([0-9a-zA-Z_.-]+)@([0-9a-zA-Z-]+(\.[a-zA-Z]+){1,2})";

MatchCollection mat = GetWebInfo(wc, webAddress, strRegex);

foreach (Match item in mat)

{

if (item.Success)

{

Console.WriteLine(item.Value+"===用戶名為："+item.Groups[1].Value+"===域名為："+item.Groups[2].Value);

}

}

Console.WriteLine("一共有{0}個", mat.Count);

Console.ReadKey();

}

public static MatchCollection GetWebInfo(WebClient wc, string webAddress, string strRegex)

{

string html = wc.DownloadString(webAddress);

Regex regex = new Regex(strRegex);

MatchCollection mat = regex.Matches(html);

return mat;

}

}

}

轉載于:https://www.cnblogs.com/CharlesZHENG/p/3527521.html

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