using System; using System.Collections.Generic; using System.IO; using System.IO.Compression; using System.Linq; using System.Net; using System.Net.Security; using System.Security.Cryptography.X509Certificates; using System.Text; using System.Text.RegularExpressions; using System.Threading; using System.Threading.Tasks; namespace CsharpHttpHelper { public class HttpException : Exception { /// /// Cookie是否在线 /// public bool IsOnline { get; set; } = true; public HttpException(string message) : base(message) { } public HttpException(string message, Exception innerException) : base(message, innerException) { } } /// /// Http连接操作帮助类 /// public class HttpHelper { public static HttpResult Get(string Url) { return Request(new HttpItem { URL = Url, Method = MethodType.Get, }); } public static HttpResult Post(string Url, string PostData) { return Request(new HttpItem { URL = Url, Method = MethodType.Post, Postdata = PostData, PostDataType = PostDataType.String }); } public static Task GetAsync(string Url) { return RequestAsync(new HttpItem { URL = Url, Method = MethodType.Get }); } public static Task PostAsync(string Url, string PostData) { return RequestAsync(new HttpItem { URL = Url, Method = MethodType.Post, Postdata = PostData }); } /// /// 下载文件 /// /// /// public static byte[] DownloadFile(string address) { HttpItem item = new HttpItem(); item.URL = address; item.Timeout = 3000; item.ResultType = ResultType.Byte; HttpHelper http = new HttpHelper(); HttpResult result = http.GetHtml(item); if (result.StatusCode == HttpStatusCode.OK) { return result.ResultByte; } else { throw new HttpListenerException((int)result.StatusCode, result.StatusDescription); } } public static HttpResult Request(HttpItem item) { return new HttpHelper().GetHtml(item); } public static Task RequestAsync(HttpItem item) { return new HttpHelper().GetHtmlCoreAsync(item); } #region Cookie /// /// 根据字符生成Cookie和精简串，将排除path,expires,domain以及重复项 /// /// Cookie字符串 /// 精简串 public static string GetSmallCookie(string strcookie) { return HttpCookieHelper.GetSmallCookie(strcookie); } /// /// 将字符串Cookie转为CookieCollection /// /// Cookie字符串 /// List-CookieItem public static CookieCollection StrCookieToCookieCollection(string strcookie) { return HttpCookieHelper.StrCookieToCookieCollection(strcookie); } /// /// 将CookieCollection转为字符串Cookie /// /// Cookie字符串 /// strcookie public static string CookieCollectionToStrCookie(CookieCollection cookie) { return HttpCookieHelper.CookieCollectionToStrCookie(cookie); } /// /// 自动合并两个Cookie的值返回更新后结果 /// /// Cookie1 新 /// Cookie2 旧 /// 返回更新后的Cookie public static string GetMergeCookie(string cookie1, string cookie2) { return HttpCookieHelper.GetMergeCookie(cookie1, cookie2); } #endregion #region 预定义方法或者变更 //默认的编码 private Encoding encoding = Encoding.Default; //Post数据编码 private Encoding postencoding = Encoding.Default; //HttpWebRequest对象用来发起请求 private HttpWebRequest request = null; /// /// 根据相传入的数据，得到相应页面数据 /// /// 参数类对象 /// 返回HttpResult类型 public HttpResult GetHtml(HttpItem item) { try { SetRequest(item); if (item.Method == MethodType.Post || item.Method == MethodType.Put) { byte[] body; if (item.PostDataType == PostDataType.FilePath && !string.IsNullOrEmpty(item.Postdata)) { using var reader = new StreamReader(item.Postdata, postencoding); body = postencoding.GetBytes(reader.ReadToEnd()); } else body = GetPostBytes(item); if (body != null) { request.ContentLength = body.Length; using var stream = request.GetRequestStream(); stream.Write(body, 0, body.Length); } } } catch (Exception ex) { return ConfigurationError(ex); } var result = new HttpResult { item = item }; try { using var response = (HttpWebResponse)request.GetResponse(); SetResponseHeaders(result, response); if (response.Cookies != null) result.CookieCollection = response.Cookies; result.Cookie = response.Headers["set-cookie"]; using var source = OpenResponseStream(response); using var buffer = new MemoryStream(); source.CopyTo(buffer); DecodeBody(item, result, response, buffer.ToArray()); } catch (WebException ex) when (ex.Response is HttpWebResponse) { using var response = (HttpWebResponse)ex.Response; SetResponseHeaders(result, response); using var reader = new StreamReader(OpenResponseStream(response), item.Encoding ?? Encoding.UTF8); result.Html = reader.ReadToEnd(); } catch (Exception ex) { result.Html = ex.Message; } if (item.IsToLower) result.Html = result.Html.ToLower(); return result; } public Task GetHtmlAsync(HttpItem item) { // 每次异步调用独立保存请求和编码，允许同一实例并发使用。 return new HttpHelper().GetHtmlCoreAsync(item); } private async Task GetHtmlCoreAsync(HttpItem item) { using var timeout = new CancellationTokenSource(); using var abort = timeout.Token.Register(() => request.Abort()); try { SetRequest(item); timeout.CancelAfter(request.Timeout); if (item.Method == MethodType.Post || item.Method == MethodType.Put) { byte[] body; if (item.PostDataType == PostDataType.FilePath && !string.IsNullOrEmpty(item.Postdata)) { using var reader = new StreamReader(item.Postdata, postencoding); body = postencoding.GetBytes(await reader.ReadToEndAsync().ConfigureAwait(false)); } else body = GetPostBytes(item); if (body != null) { request.ContentLength = body.Length; using var stream = await request.GetRequestStreamAsync().ConfigureAwait(false); await stream.WriteAsync(body, 0, body.Length).ConfigureAwait(false); } } } catch (Exception ex) { return ConfigurationError(ex); } var result = new HttpResult { item = item }; try { using var response = (HttpWebResponse)await request.GetResponseAsync().ConfigureAwait(false); SetResponseHeaders(result, response); if (response.Cookies != null) result.CookieCollection = response.Cookies; result.Cookie = response.Headers["set-cookie"]; using var source = OpenResponseStream(response); using var buffer = new MemoryStream(); await source.CopyToAsync(buffer).ConfigureAwait(false); DecodeBody(item, result, response, buffer.ToArray()); } catch (WebException ex) when (ex.Response is HttpWebResponse) { using var response = (HttpWebResponse)ex.Response; SetResponseHeaders(result, response); using var reader = new StreamReader(OpenResponseStream(response), item.Encoding ?? Encoding.UTF8); result.Html = await reader.ReadToEndAsync().ConfigureAwait(false); } catch (Exception ex) { result.Html = ex.Message; } if (item.IsToLower) result.Html = result.Html.ToLower(); return result; } private static HttpResult ConfigurationError(Exception ex) { return new HttpResult { Cookie = string.Empty, Html = ex.Message, StatusDescription = "配置参数时出错：" + ex.Message }; } private static void SetResponseHeaders(HttpResult result, HttpWebResponse response) { result.StatusCode = response.StatusCode; result.StatusDescription = response.StatusDescription; result.Header = response.Headers; } private static Stream OpenResponseStream(HttpWebResponse response) { var stream = response.GetResponseStream(); return string.Equals(response.ContentEncoding, "gzip", StringComparison.OrdinalIgnoreCase) ? new GZipStream(stream, CompressionMode.Decompress) : stream; } private void DecodeBody(HttpItem item, HttpResult result, HttpWebResponse response, byte[] bytes) { if (bytes.Length > 0) { //是否返回Byte类型数据 if (item.ResultType == ResultType.Byte) result.ResultByte = bytes; //从这里开始我们要无视编码了 if (encoding == null) { Match meta = Regex.Match(Encoding.Default.GetString(bytes), " 1) ? meta.Groups[2].Value.ToLower().Trim() : string.Empty; if (c.Length > 2) { try { if (c.IndexOf(" ") > 0) c = c.Substring(0, c.IndexOf(" ")); encoding = Encoding.GetEncoding(c.Replace("\"", "").Replace("'", "").Replace(";", "").Replace("iso-8859-1", "gbk").Trim()); } catch { if (string.IsNullOrEmpty(response.CharacterSet)) encoding = Encoding.UTF8; else encoding = Encoding.GetEncoding(response.CharacterSet); } } else { if (string.IsNullOrEmpty(response.CharacterSet)) encoding = Encoding.UTF8; else encoding = Encoding.GetEncoding(response.CharacterSet); } } //得到返回的HTML result.Html = encoding.GetString(bytes); } else { //得到返回的HTML result.Html = "本次请求并未返回任何数据"; } } /// /// 为请求准备参数 /// ///参数列表 private void SetRequest(HttpItem item) { // 验证证书 SetCer(item); //设置Header参数 if (item.Header != null && item.Header.Count > 0) foreach (string key in item.Header.AllKeys) { request.Headers.Add(key, item.Header[key]); } // 设置代理 SetProxy(item); if (item.ProtocolVersion != null) request.ProtocolVersion = item.ProtocolVersion; request.ServicePoint.Expect100Continue = item.Expect100Continue; //请求方式Get或者Post request.Method = item.Method.ToString(); request.Timeout = item.Timeout; request.KeepAlive = item.KeepAlive; request.ReadWriteTimeout = item.ReadWriteTimeout; //Accept request.Accept = item.Accept; //ContentType返回类型 request.ContentType = item.ContentType; //UserAgent客户端的访问类型，包括浏览器版本和操作系统信息 request.UserAgent = item.UserAgent; // 编码 encoding = item.Encoding; if (item.Method != MethodType.Get && item.PostEncoding != null) postencoding = item.PostEncoding; //设置安全凭证 request.Credentials = item.ICredentials; //设置Cookie SetCookie(item); //来源地址 request.Referer = item.Referer; //是否执行跳转功能 request.AllowAutoRedirect = item.Allowautoredirect; //设置最大连接 if (item.Connectionlimit > 0) request.ServicePoint.ConnectionLimit = item.Connectionlimit; } /// /// 设置证书 /// /// private void SetCer(HttpItem item) { if (!string.IsNullOrEmpty(item.CerPath)) { //这一句一定要写在创建连接的前面。使用回调的方法进行证书验证。 ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult); //初始化对像，并设置请求的URL地址 request = (HttpWebRequest)WebRequest.Create(item.URL); SetCerList(item); //将证书添加到请求里 request.ClientCertificates.Add(new X509Certificate(item.CerPath)); } else { //初始化对像，并设置请求的URL地址 request = (HttpWebRequest)WebRequest.Create(item.URL); SetCerList(item); } } /// /// 设置多个证书 /// /// private void SetCerList(HttpItem item) { if (item.ClentCertificates != null && item.ClentCertificates.Count > 0) { foreach (X509Certificate c in item.ClentCertificates) { request.ClientCertificates.Add(c); } } } /// /// 设置Cookie /// /// Http参数 private void SetCookie(HttpItem item) { if (!string.IsNullOrEmpty(item.Cookie)) request.Headers[HttpRequestHeader.Cookie] = item.Cookie; //设置CookieCollection if (item.ResultCookieType == ResultCookieType.CookieCollection) { request.CookieContainer = new CookieContainer(); if (item.CookieCollection != null && item.CookieCollection.Count > 0) request.CookieContainer.Add(item.CookieCollection); } } private byte[] GetPostBytes(HttpItem item) { if (item.PostDataType == PostDataType.Byte && item.PostdataByte?.Length > 0) return item.PostdataByte; return string.IsNullOrEmpty(item.Postdata) ? null : postencoding.GetBytes(item.Postdata); } /// /// 设置代理 /// /// 参数对象 private void SetProxy(HttpItem item) { bool isIeProxy = item.ProxyIp.ToLower().Contains("ieproxy"); if (!string.IsNullOrEmpty(item.ProxyIp) && !isIeProxy) { //设置代理服务器 if (item.ProxyIp.Contains(":")) { string[] plist = item.ProxyIp.Split(':'); WebProxy myProxy = new WebProxy(plist[0].Trim(), Convert.ToInt32(plist[1].Trim())); //建议连接 myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd); //给当前请求对象 request.Proxy = myProxy; } else { WebProxy myProxy = new WebProxy(item.ProxyIp, false); //建议连接 myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd); //给当前请求对象 request.Proxy = myProxy; } } else if (isIeProxy) { //设置为IE代理 } else { request.Proxy = item.WebProxy; } } /// /// 回调验证证书问题 /// /// 流对象 /// 证书 /// X509Chain /// SslPolicyErrors /// bool public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; } #endregion } /// /// Http请求参考类 /// public class HttpItem { string _URL = string.Empty; /// /// 请求URL必须填写 /// public string URL { get { return _URL; } set { _URL = value; } } MethodType _Method = MethodType.Get; /// /// 请求方式默认为GET方式,当为POST方式时必须设置Postdata的值 public MethodType Method /// { get { return _Method; } set { _Method = value; } } int _Timeout = 100000; /// /// 默认请求超时时间 /// public int Timeout { get { return _Timeout; } set { _Timeout = value; } } int _ReadWriteTimeout = 30000; /// /// 默认写入Post数据超时间 /// public int ReadWriteTimeout { get { return _ReadWriteTimeout; } set { _ReadWriteTimeout = value; } } Boolean _KeepAlive = true; /// /// 获取或设置一个值，该值指示是否与 Internet 资源建立持久性连接默认为true。 /// public Boolean KeepAlive { get { return _KeepAlive; } set { _KeepAlive = value; } } string _Accept = "text/html, application/xhtml+xml, */*"; /// /// 请求标头值 默认为text/html, application/xhtml+xml, */* /// public string Accept { get { return _Accept; } set { _Accept = value; } } string _ContentType = "text/html"; /// /// 请求返回类型默认 text/html /// public string ContentType { get { return _ContentType; } set { _ContentType = value; } } string _UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)"; /// /// 客户端访问信息默认Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0) /// public string UserAgent { get { return _UserAgent; } set { _UserAgent = value; } } Encoding _Encoding = null; /// /// 返回数据编码默认为NUll,可以自动识别,一般为utf-8,gbk,gb2312 /// public Encoding Encoding { get { return _Encoding; } set { _Encoding = value; } } private PostDataType _PostDataType = PostDataType.String; /// /// Post的数据类型 /// public PostDataType PostDataType { get { return _PostDataType; } set { _PostDataType = value; } } string _Postdata = string.Empty; /// /// Post请求时要发送的字符串Post数据 /// public string Postdata { get { return _Postdata; } set { _Postdata = value; } } private byte[] _PostdataByte = null; /// /// Post请求时要发送的Byte类型的Post数据 /// public byte[] PostdataByte { get { return _PostdataByte; } set { _PostdataByte = value; } } private WebProxy _WebProxy; /// /// 设置代理对象，不想使用IE默认配置就设置为Null，而且不要设置ProxyIp /// public WebProxy WebProxy { get { return _WebProxy; } set { _WebProxy = value; } } CookieCollection cookiecollection = null; /// /// Cookie对象集合 /// public CookieCollection CookieCollection { get { return cookiecollection; } set { cookiecollection = value; } } string _Cookie = string.Empty; /// /// 请求时的Cookie /// public string Cookie { get { return _Cookie; } set { _Cookie = value; } } string _Referer = string.Empty; /// /// 来源地址，上次访问地址 /// public string Referer { get { return _Referer; } set { _Referer = value; } } string _CerPath = string.Empty; /// /// 证书绝对路径 /// public string CerPath { get { return _CerPath; } set { _CerPath = value; } } private Boolean isToLower = false; /// /// 是否设置为全文小写，默认为不转化 /// public Boolean IsToLower { get { return isToLower; } set { isToLower = value; } } private Boolean allowautoredirect = false; /// /// 支持跳转页面，查询结果将是跳转后的页面，默认是不跳转 /// public Boolean Allowautoredirect { get { return allowautoredirect; } set { allowautoredirect = value; } } private int connectionlimit = 1024; /// /// 最大连接数 /// public int Connectionlimit { get { return connectionlimit; } set { connectionlimit = value; } } private string proxyusername = string.Empty; /// /// 代理Proxy 服务器用户名 /// public string ProxyUserName { get { return proxyusername; } set { proxyusername = value; } } private string proxypwd = string.Empty; /// /// 代理 服务器密码 /// public string ProxyPwd { get { return proxypwd; } set { proxypwd = value; } } private string proxyip = string.Empty; /// /// 代理 服务IP ,如果要使用IE代理就设置为ieproxy /// public string ProxyIp { get { return proxyip; } set { proxyip = value; } } private ResultType resulttype = ResultType.String; /// /// 设置返回类型String和Byte /// public ResultType ResultType { get { return resulttype; } set { resulttype = value; } } private WebHeaderCollection header = new WebHeaderCollection(); /// /// header对象 /// public WebHeaderCollection Header { get { return header; } set { header = value; } } private Version _ProtocolVersion; /// // 获取或设置用于请求的 HTTP 版本。返回结果:用于请求的 HTTP 版本。默认为 System.Net.HttpVersion.Version11。 /// public Version ProtocolVersion { get { return _ProtocolVersion; } set { _ProtocolVersion = value; } } private Boolean _expect100continue = true; /// /// 获取或设置一个 System.Boolean 值，该值确定是否使用 100-Continue 行为。如果 POST 请求需要 100-Continue 响应，则为 true；否则为 false。默认值为 true。 /// public Boolean Expect100Continue { get { return _expect100continue; } set { _expect100continue = value; } } private X509CertificateCollection _ClentCertificates; /// /// 设置509证书集合 /// public X509CertificateCollection ClentCertificates { get { return _ClentCertificates; } set { _ClentCertificates = value; } } private Encoding _PostEncoding; /// /// 设置或获取Post参数编码,默认的为Default编码 /// public Encoding PostEncoding { get { return _PostEncoding; } set { _PostEncoding = value; } } private ResultCookieType _ResultCookieType = ResultCookieType.String; /// /// Cookie返回类型,默认的是只返回字符串类型 /// public ResultCookieType ResultCookieType { get { return _ResultCookieType; } set { _ResultCookieType = value; } } private ICredentials _ICredentials = CredentialCache.DefaultCredentials; /// /// 获取或设置请求的身份验证信息。 /// public ICredentials ICredentials { get { return _ICredentials; } set { _ICredentials = value; } } } /// /// Http返回参数类 /// public class HttpResult { private string _Cookie; /// /// Http请求返回的Cookie /// public string Cookie { get { return _Cookie; } set { _Cookie = value; } } private CookieCollection _CookieCollection; /// /// Cookie对象集合 /// public CookieCollection CookieCollection { get { return _CookieCollection; } set { _CookieCollection = value; } } private string _Html; /// /// 返回的String类型数据 只有ResultType.String时才返回数据，其它情况为空 /// public string Html { get { return _Html; } set { _Html = value; } } private byte[] _ResultByte; /// /// 返回的Byte数组 只有ResultType.Byte时才返回数据，其它情况为空 /// public byte[] ResultByte { get { return _ResultByte; } set { _ResultByte = value; } } private WebHeaderCollection _Header; /// /// header对象 /// public WebHeaderCollection Header { get { return _Header; } set { _Header = value; } } private string _StatusDescription; /// /// 返回状态说明 /// public string StatusDescription { get { return _StatusDescription; } set { _StatusDescription = value; } } private HttpStatusCode _StatusCode; /// /// 返回状态码,默认为OK /// public HttpStatusCode StatusCode { get { return _StatusCode; } set { _StatusCode = value; } } /// /// HttpItem类，用于存储实际执行所用到的HttpItem对象 /// public HttpItem item { get; set; } } /// /// 返回类型 /// public enum ResultType { /// /// 表示只返回字符串 只有Html有数据 /// String, /// /// 表示返回字符串和字节流 ResultByte和Html都有数据返回 /// Byte } /// /// Post的数据格式默认为string /// public enum PostDataType { /// /// 字符串类型，这时编码Encoding可不设置 /// String, /// /// Byte类型，需要设置PostdataByte参数的值编码Encoding可设置为空 /// Byte, /// /// 传文件，Postdata必须设置为文件的绝对路径，必须设置Encoding的值 /// FilePath } /// /// Cookie返回类型 /// public enum ResultCookieType { /// /// 只返回字符串类型的Cookie /// String, /// /// CookieCollection格式的Cookie集合同时也返回String类型的cookie /// CookieCollection } public enum MethodType { Get, Post, Put } internal static class HttpCookieHelper { /// /// 根据字符生成Cookie和精简串，将排除path,expires,domain以及重复项 /// /// Cookie字符串 /// 精简串 internal static string GetSmallCookie(string strcookie) { if (string.IsNullOrWhiteSpace(strcookie)) { return string.Empty; } List cookielist = new List(); //将Cookie字符串以,;分开，生成一个字符数组，并删除里面的空项 string[] list = strcookie.ToString().Split(new string[] { ",", ";" }, StringSplitOptions.RemoveEmptyEntries); foreach (string item in list) { string itemcookie = item.ToLower().Trim().Replace("\r\n", string.Empty).Replace("\n", string.Empty); //排除空字符串 if (string.IsNullOrWhiteSpace(itemcookie)) continue; //排除不存在=号的Cookie项 if (!itemcookie.Contains("=")) continue; //排除path项 if (itemcookie.Contains("path=")) continue; //排除expires项 if (itemcookie.Contains("expires=")) continue; //排除domain项 if (itemcookie.Contains("domain=")) continue; if (itemcookie.Contains("samesite=")) continue; //排除重复项 if (cookielist.Contains(item)) continue; //对接Cookie基本的Key和Value串 cookielist.Add(string.Format("{0};", item)); } return string.Join(";", cookielist); } /// /// 将字符串Cookie转为CookieCollection /// /// Cookie字符串 /// List-CookieItem internal static CookieCollection StrCookieToCookieCollection(string strcookie) { //排除空字符串 if (string.IsNullOrWhiteSpace(strcookie)) { return null; } CookieCollection cookielist = new CookieCollection(); //先简化Cookie strcookie = GetSmallCookie(strcookie); //将Cookie字符串以,;分开，生成一个字符数组，并删除里面的空项 string[] list = strcookie.ToString().Split(new string[] { ";" }, StringSplitOptions.RemoveEmptyEntries); foreach (string item in list) { string[] cookie = item.ToString().Split(new string[] { "=" }, StringSplitOptions.RemoveEmptyEntries); if (cookie.Length == 2) { cookielist.Add(new Cookie() { Name = cookie[0].Trim(), Value = cookie[1].Trim() }); } } return cookielist; } /// /// 将CookieCollection转为字符串Cookie /// /// Cookie字符串 /// strcookie internal static string CookieCollectionToStrCookie(CookieCollection cookie) { if (cookie == null) { return string.Empty; } string resultcookie = string.Empty; foreach (Cookie item in cookie) { resultcookie += string.Format("{0}={1};", item.Name, item.Value); } return resultcookie; } /// /// 自动合并两个Cookie的值返回更新后结果 /// /// Cookie1 新 /// Cookie2 旧 /// 返回更新后的Cookie internal static string GetMergeCookie(string cookie1, string cookie2) { if (string.IsNullOrWhiteSpace(cookie1))//新的是空的 { return cookie2;//返回老的 } if (string.IsNullOrWhiteSpace(cookie2))//老的是空的 { return cookie1;//返回新的 } Dictionary cookielist = new Dictionary();//结果 string[] list_1 = cookie1.ToString().Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries); string[] list_2 = cookie2.ToString().Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries); foreach (string item in list_1) { var dict = GetCookieDict(item); //替换重复项 if (cookielist.ContainsKey(dict.Key)) { continue; } else { cookielist.Add(dict.Key, dict.Value); } } foreach (string item in list_2) { var dict = GetCookieDict(item); //替换重复项 if (cookielist.ContainsKey(dict.Key)) { continue; } else { cookielist.Add(dict.Key, dict.Value); } } return string.Join(";", cookielist.Select(a => { return $"{a.Key}={a.Value}"; })); } private static KeyValuePair GetCookieDict(string cookie) { string[] item = cookie.Split(new char[] { '=' }, StringSplitOptions.RemoveEmptyEntries); if (item.Length > 2) { item = new string[2]; Match match = Regex.Match(cookie, "(?^.+?)=(?.*)"); item[0] = match.Groups["key"].Value; item[1] = match.Groups["value"].Value; } string key = ""; string value = ""; key = item.Length > 0 ? item[0] : ""; value = item.Length > 1 ? item[1] : ""; return new KeyValuePair(key, value); } } }