下面写出取得HTML中所有图片地址的类HvtHtmlImage：
using System.Text.RegularExpressions;
namespace HoverTree.HoverTreeFrame.HvtImage
{
public class HvtHtmlImage
{
/// <summary>
/// 取得HTML中所有图片的 URL。
/// </summary>
/// <param name="sHtmlText">HTML代码</param>
/// <returns>图片的URL列表</returns>
public static string[] GetHvtImgUrls(string sHtmlText)
{
// 定义正则表达式用来匹配 img 标签
Regex m_hvtRegImg = new Regex(@"<imgb[^<>]*?bsrc[strn]*=[strn]*[""']?[strn]*(?<imgUrl>[^strn""'<>]*)[^<>]*?/?[strn]*>", RegexOptions.IgnoreCase);
// 搜索匹配的字符串
MatchCollection matches = m_hvtRegImg.Matches(sHtmlText);
int m_i = 0;
string[] sUrlList = new string[matches.Count];
// 取得匹配项列表
foreach (Match match in matches)
sUrlList[m_i++] = match.Groups["imgUrl"].Value;
return sUrlList;
}
}
}
下面我们再来看一个例子
public Array MatchHtml(string html,string com)
{
List<string> urls = new List<string>();
html = html.ToLower();
//获取SRC标签中的URL
Regex regexSrc = new Regex("src="[^"]*[(.jpg)(.png)(.gif)(.bmp)(.ico)]"");
foreach(Match m in regexSrc.Matches(html))
{
string src = m.Value;
src = src.Replace("src=","").Replace(""","");
if (!src.Contains("http"))
src = com + src;
if(!urls.Contains(src))
urls.Add(src);
}
//获取HREF标签中URL
Regex regexHref = new Regex("href="[^"]*[(.jpg)(.png)(.gif)(.bmp)(.ico)]"");
foreach (Match m in regexHref.Matches(html))
{
string href = m.Value;
href = href.Replace("href=", "").Replace(""", "");
if (!href.Contains("http"))
href = com + href;
if(!urls.Contains(href))
urls.Add(href);
}
return urls.ToArray();
}
[DllImport("kernel32.dll")]
static extern bool SetConsoleMode(IntPtr hConsoleHandle, int mode);
[DllImport("kernel32.dll")]
static extern bool GetConsoleMode(IntPtr hConsoleHandle, out int mode);
[DllImport("kernel32.dll")]
static extern IntPtr GetStdHandle(int handle);
const int STD_INPUT_HANDLE = -10;
const int ENABLE_QUICK_EDIT_MODE = 0x40 | 0x80;
public static void EnableQuickEditMode()
{
int mode; IntPtr handle = GetStdHandle(STD_INPUT_HANDLE);
GetConsoleMode(handle, out mode);
mode |= ENABLE_QUICK_EDIT_MODE;
SetConsoleMode(handle, mode);
}
static void Main(string[] args)
{
EnableQuickEditMode();
int oldCount = 0;
Console.Title = "TakeImageFromInternet";
string path = "E:Downloadloading";
while (true)
{
Console.Clear();
string countFile = "E:CountFile.txt";//用来计数的文本，以至于文件名不重复
int cursor = 0;
if (File.Exists(countFile))
{
string text = File.ReadAllText(countFile);
try
{
cursor =oldCount = Convert.ToInt32(text);//次数多了建议使用long
}
catch { }
}
Console.Write("please input a url:");
string url = "http://www.easck.com/";
string temp = Console.ReadLine();
if (!string.IsNullOrEmpty(temp))
url = temp;
Match mcom = new Regex(@"^(?i)http://www.easck.com//获取域名
string com = mcom.Value;
//Console.WriteLine(mcom.Value);
Console.Write("please input a save path:");
temp = Console.ReadLine();
if (Directory.Exists(temp))
path = temp;
Console.WriteLine();
WebClient client = new WebClient();
byte[] htmlData = null;
htmlData = client.DownloadData(url);
MemoryStream mstream = new MemoryStream(htmlData);
string html = "";
using (StreamReader sr = new StreamReader(mstream))
{
html = sr.ReadToEnd();
}
Array urls = new MatchHtmlImageUrl().MatchHtml(html,com);
foreach (string imageurl in urls)
{
Console.WriteLine(imageurl);
byte[] imageData = null;
try
{
imageData = client.DownloadData(imageurl);
}
catch { }
if (imageData != null && imageData.Length>0)
using (MemoryStream ms = new MemoryStream(imageData))
{
try
{
string ext = Aping.Utility.File.FileOpration.ExtendName(imageurl);
ImageFormat format = ImageFormat.Jpeg;
switch (ext)
{
case ".jpg":
format = ImageFormat.Jpeg;
break;
case ".bmp":
format = ImageFormat.Bmp;
break;
case ".png":
format = ImageFormat.Png;
break;
case ".gif":
format = ImageFormat.Gif;
break;
case ".ico":
format = ImageFormat.Icon;
break;
default:
continue;
}
Image image = new Bitmap(ms);
if (Directory.Exists(path))
image.Save(path + "" + cursor + ext, format);
}
catch(Exception ex) { Console.WriteLine(ex.Message); }
}
cursor++;
}
mstream.Close();
File.WriteAllText(countFile, cursor.ToString(), Encoding.UTF8);
Console.WriteLine("take done...image count:"+(cursor-oldCount).ToString());
}
}
