学步园

/*<br /> * 对于下面的编码方式中，Baidu是使用gb2312，而Google是使用UTF8的，所以这些编码如何解释呢？<br /> * 解决办法就是如MyUrlDeCode方法所写的，把编码进行一次解码，再把解码后的字符串进行编码，再对字符串进行比较，如果是相同的，那就是使用了这种编码的。还要注意进行ToUpper字符串。<br /> * 例如：<br /> * 博汇数码（查找的关键字）<br /> * string baidu = HttpUtility.UrlDecode("wd=%B2%A9%BB%E3%CA%FD%C2%EB");<br /> * string google = HttpUtility.UrlDecode("q=%E5%8D%9A%E6%B1%87%E6%95%B0%E7%A0%81");<br /> * 关于return GetQueryString(queryString, null, true); 如果你传入的是null，那就是表示你无法确认编码是gb2312还是UTF8，<br /> * 当你确认编码的，可以直接传入编码类型，比如return GetQueryString(queryString, Encoding.UTF8, true);<br /> * 需要注意queryString = queryString.Replace("?", "");把?给过滤掉。<br /> *<br /> * */</p> <p>using System;<br /> using System.Configuration;<br /> using System.Data;<br /> using System.Linq;<br /> using System.Web;<br /> using System.Web.Security;<br /> using System.Web.UI;<br /> using System.Web.UI.HtmlControls;<br /> using System.Web.UI.WebControls;<br /> using System.Web.UI.WebControls.WebParts;<br /> using System.Xml.Linq;<br /> using System.Collections.Specialized;<br /> using System.Text;</p> <p>public partial class _Default : System.Web.UI.Page<br /> {<br /> public string strGb2312 = "";</p> <p> protected void Page_Load(object sender, EventArgs e)<br /> {<br /> //string pageURL = "http://www.google.com.hk/search?hl=zh-CN&source=hp&q=%E5%8D%9A%E6%B1%87%E6%95%B0%E7%A0%81&aq=f&aqi=g2&aql=&oq=&gs_rfai=";<br /> //Uri uri = new Uri(pageURL);<br /> //string queryString = uri.Query;<br /> //NameValueCollection col = GetQueryString(queryString);<br /> //string searchKey = col["q"];<br /> //结果 searchKey = "博汇数码"</p> <p> string strURL = "http://www.tt8484.com/soso/PeripheralLine.aspx?q=%b1%a6%b1%a6%d1%c0%b3%dd&btnS=2";<br /> Uri uri = new Uri(strURL);<br /> string queryString = uri.Query;<br /> NameValueCollection col = GetQueryString(queryString);<br /> string searchKey = col["q"];<br /> string strTest1 = col["sitesearch"];<br /> //Response.Redirect("http://www.google.com.hk/search?hl=zh-CN&q=" + "一日游" + "&sitesearch=www.tt8484.com");</p> <p> }</p> <p> /// <summary><br /> /// 测试.<br /> /// </summary><br /> public void Test()<br /> {<br /> string pageURL = "http://www.google.com.hk/search?hl=zh-CN&source=hp&q=%E5%8D%9A%E6%B1%87%E6%95%B0%E7%A0%81&aq=f&aqi=g2&aql=&oq=&gs_rfai=";<br /> Uri uri = new Uri(pageURL);<br /> string queryString = uri.Query;<br /> NameValueCollection col = GetQueryString(queryString);<br /> string searchKey = col["q"];<br /> //结果 searchKey = "博汇数码"<br /> }</p> <p> /// <summary><br /> /// 将查询字符串解析转换为名值集合.<br /> /// </summary><br /> /// <param name="queryString"></param><br /> /// <returns></returns><br /> public static NameValueCollection GetQueryString(string queryString)<br /> {<br /> return GetQueryString(queryString, null, true);<br /> }</p> <p> /// <summary><br /> /// 将查询字符串解析转换为名值集合.<br /> /// </summary><br /> /// <param name="queryString"></param><br /> /// <param name="encoding"></param><br /> /// <param name="isEncoded"></param><br /> /// <returns></returns><br /> public static NameValueCollection GetQueryString(string queryString, Encoding encoding, bool isEncoded)<br /> {<br /> queryString = queryString.Replace("?", "");<br /> NameValueCollection result = new NameValueCollection(StringComparer.OrdinalIgnoreCase);<br /> if (!string.IsNullOrEmpty(queryString))<br /> {<br /> int count = queryString.Length;<br /> for (int i = 0; i < count; i++)<br /> {<br /> int startIndex = i;<br /> int index = -1;<br /> while (i < count)<br /> {<br /> char item = queryString[i];<br /> if (item == '=')<br /> {<br /> if (index < 0)<br /> {<br /> index = i;<br /> }<br /> }<br /> else if (item == '&')<br /> {<br /> break;<br /> }<br /> i++;<br /> }<br /> string key = null;<br /> string value = null;<br /> if (index >= 0)<br /> {<br /> key = queryString.Substring(startIndex, index - startIndex);<br /> value = queryString.Substring(index + 1, (i - index) - 1);<br /> }<br /> else<br /> {<br /> key = queryString.Substring(startIndex, i - startIndex);<br /> }<br /> if (isEncoded)<br /> {<br /> result[MyUrlDeCode(key, encoding)] = MyUrlDeCode(value, encoding);<br /> }<br /> else<br /> {<br /> result[key] = value;<br /> }<br /> if ((i == (count - 1)) && (queryString[i] == '&'))<br /> {<br /> result[key] = string.Empty;<br /> }<br /> }<br /> }<br /> return result;<br /> }</p> <p> /// <summary><br /> /// 解码URL.<br /> /// </summary><br /> /// <param name="encoding">null为自动选择编码</param><br /> /// <param name="str"></param><br /> /// <returns></returns><br /> public static string MyUrlDeCode(string str, Encoding encoding)<br /> {<br /> if (encoding == null)<br /> {<br /> Encoding utf8 = Encoding.UTF8;<br /> //首先用utf-8进行解码<br /> string code = HttpUtility.UrlDecode(str.ToUpper(), utf8);<br /> //将已经解码的字符再次进行编码.<br /> string encode = HttpUtility.UrlEncode(code, utf8).ToUpper();<br /> if (str == encode)<br /> encoding = Encoding.UTF8;<br /> else<br /> encoding = Encoding.GetEncoding("gb2312");<br /> }<br /> return HttpUtility.UrlDecode(str, encoding);<br /> }</p> <p>}<br />