我要评论本文实例讲述了c#自定义针对url地址的处理类。分享给大家供大家参考。具体分析如下：
这个c#类是专门针对url网址处理的类，可以对url地址进行base64的加密和解密，可以通过函数的方式向url添加参数，可以更新url中已有参数的值，分析url地址的域名、子域名，分析url的所有参数和参数值，功能非常全面，还可以自己扩充，非常具有实用价值
using system;
using system.text.regularexpressions;
using system.web;
using system.collections.specialized;
namespace dotnet.utilities
{
/// <summary>
/// url的操作类
/// </summary>
public class urloper
{
static system.text.encoding encoding = system.text.encoding.utf8;
#region url的64位编码
public static string base64encrypt(string sourthurl)
{
string eurl = httputility.urlencode(sourthurl);
eurl = convert.tobase64string(encoding.getbytes(eurl));
return eurl;
}
#endregion
#region url的64位解码
public static string base64decrypt(string estr)
{
if (!isbase64(estr))
{
return estr;
}
byte[] buffer = convert.frombase64string(estr);
string sourthurl = encoding.getstring(buffer);
sourthurl = httputility.urldecode(sourthurl);
return sourthurl;
}
/// <summary>
/// 是否是base64字符串
/// </summary>
/// <param name="estr"></param>
/// <returns></returns>
public static bool isbase64(string estr)
{
if ((estr.length % 4) != 0)
{
return false;
}
if (!regex.ismatch(estr, "^[a-z0-9/+=]*$", regexoptions.ignorecase))
{
return false;
}
return true;
}
#endregion
/// <summary>
/// 添加url参数
/// </summary>
public static string addparam(string url, string paramname, string value)
{
uri uri = new uri(url);
if (string.isnullorempty(uri.query))
{
string eval = httpcontext.current.server.urlencode(value);
return string.concat(url, "?" + paramname + "=" + eval);
}
else
{
string eval = httpcontext.current.server.urlencode(value);
return string.concat(url, "&" + paramname + "=" + eval);
}
}
/// <summary>
/// 更新url参数
/// </summary>
public static string updateparam(string url, string paramname, string value)
{
string keyword = paramname+"=";
int index = url.indexof(keyword)+keyword.length;
int index1 = url.indexof("&", index);
if (index1 == -1)
{
url = url.remove(index, url.length - index);
url = string.concat(url, value);
return url;
}
url = url.remove(index,index1 - index);
url = url.insert(index, value);
return url;
}
#region 分析url所属的域
public static void getdomain(string fromurl, out string domain, out string subdomain)
{
domain = "";
subdomain = "";
try
{
if (fromurl.indexof("的名片") > -1)
{
subdomain = fromurl;
domain = "名片";
return;
}
uribuilder builder = new uribuilder(fromurl);
fromurl = builder.tostring();
uri u = new uri(fromurl);
if (u.iswellformedoriginalstring())
{
if (u.isfile)
{
subdomain = domain = "客户端本地文件路径";
}
else
{
string authority = u.authority;
string[] ss = u.authority.split('.');
if (ss.length == 2)
{
authority = "www." + authority;
}
int index = authority.indexof('.', 0);
domain = authority.substring(index + 1, authority.length - index - 1).replace("comhttp","com");
subdomain = authority.replace("comhttp", "com");
if (ss.length < 2)
{
domain = "不明路径";
subdomain = "不明路径";
}
}
}
else
{
if (u.isfile)
{
subdomain = domain = "客户端本地文件路径";
}
else
{
subdomain = domain = "不明路径";
}
}
}
catch
{
subdomain = domain = "不明路径";
}
}
/// <summary>
/// 分析 url 字符串中的参数信息。
/// </summary>
/// <param name="url">输入的 url</param>
/// <param name="baseurl">输出 url 的基础部分</param>
/// <param name="nvc">输出分析后得到的 (参数名,参数值) 的集合</param>
public static void parseurl(string url, out string baseurl, out namevaluecollection nvc)
{
if (url == null)
throw new argumentnullexception("url");
nvc = new namevaluecollection();
baseurl = "";
if (url == "")
return;
int questionmarkindex = url.indexof('?');
if (questionmarkindex == -1)
{
baseurl = url;
return;
}
baseurl = url.substring(0, questionmarkindex);
if (questionmarkindex == url.length - 1)
return;
string ps = url.substring(questionmarkindex + 1);
// 开始分析参数对
regex re = new regex(@"(^|&)?(\w+)=([^&]+)(&|$)?", regexoptions.compiled);
matchcollection mc = re.matches(ps);
foreach (match m in mc)
{
nvc.add(m.result("$2").tolower(), m.result("$3"));
}
}
#endregion
}
}
希望本文所述对大家的c#程序设计有所帮助。
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