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。
【C#自定义针对URL地址的处理类实例】相关文章：