微信开发 企业号(三)– 主动调用(通讯录、多媒体文件、自定义菜单,下发信息) – CosmoKey
已完成通讯录、多媒体文件、自定义菜单,下发信息接口代码
代码结构
结构及父类CodeMap
获取Token
通过企业ID及管理员组I的获取Token
string strulr = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid={0}&corpsecret={1}";string corpID = "wx企业ID"; //企业IDstring Secret = "管理员组ID";//管理员组IDHttpHelper http = new HttpHelper();string respone = http.Get(string.Format(strulr, corpID, Secret), Encoding.UTF8);var token = JsonConvert.DeserializeObject<Token>(respone); Token._Token = token;return token;
返回的Token为
{"access_token":"NttjomfbHraVFAQTYg1NJ4fcP2dbJpnlnUH0TXT27MxxxxxxxxxxxxxxA","expires_in":7200}
expires_in为Token的有效时长,Token再调用接口时自动续期。
经过封装后的Token类
public class Token {public static Token _Token;public string access_token { get; set; }public int expires_in { get; set; }private DateTime createTokenTime = DateTime.Now;/// <summary>/// 到期时间(防止时间差,提前1分钟到期)/// </summary>/// <returns></returns>public DateTime TookenOverdueTime { get { return createTokenTime.AddSeconds(expires_in - 60); } }/// <summary>/// 刷新Token/// </summary>public static void Renovate() { if (_Token == null) { GetNewToken(); } Token._Token.createTokenTime = DateTime.Now; }public static bool IsTimeOut() { if (_Token == null) { GetNewToken(); } return DateTime.Now >= Token._Token.TookenOverdueTime; }public static Token GetNewToken() { string strulr = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid={0}&corpsecret={1}"; string corpID = "wx362a967b"; //企业ID string Secret = "e1OskLgJAScVSiFfWVK-0FfVz6svRVdEbR";//管理员组ID HttpHelper http = new HttpHelper(); string respone = http.Get(string.Format(strulr, corpID, Secret), Encoding.UTF8); var token = JsonConvert.DeserializeObject<Token>(respone); Token._Token = token; return token; }public static string GetToken() { if (_Token == null) { GetNewToken(); } return _Token.access_token; } }
Http请求
自己写的而一个HttpHelper类,方便与Web服务器使用HTTP协议进行通信。

using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;using System.Net.Security;using System.Security.Cryptography.X509Certificates;using System.Text;using System.Threading.Tasks;namespace Ping.Helper {public class HttpHelper {public bool Debug { get; set; }public CookieCollection Cookies {get { return _cookies; } }public void ClearCookies() { _cookies = new CookieCollection(); } CookieCollection _cookies = new CookieCollection();private static readonly string DefaultUserAgent = "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)";/// <summary> /// 创建GET方式的HTTP请求 /// </summary> /// <param name="url">请求的URL</param> /// <param name="timeout">请求的超时时间</param> /// <param name="userAgent">请求的客户端浏览器信息,可以为空</param> /// <param name="cookies">随同HTTP请求发送的Cookie信息,如果不需要身份验证可以为空</param> /// <returns></returns> public HttpWebResponse CreateGetHttpResponse(string url, int? timeout = 300, string userAgent = "", CookieCollection cookies = null, string Referer = "", Dictionary<string, string> headers = null) {if (Debug) { Console.Write("Start Get Url:{0}", url); }if (string.IsNullOrEmpty(url)) {throw new ArgumentNullException("url"); } HttpWebRequest request;if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)) { ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult); request = WebRequest.Create(url) as HttpWebRequest; request.ProtocolVersion = HttpVersion.Version10; }else{ request = WebRequest.Create(url) as HttpWebRequest; } request.Method = "GET"; request.Headers["Pragma"] = "no-cache"; request.Accept = "text/html, application/xhtml+xml, */*"; request.Headers["Accept-Language"] = "en-US,en;q=0.5"; request.ContentType = "application/x-www-form-urlencoded"; request.UserAgent = DefaultUserAgent; request.Referer = Referer;if (headers != null) {foreach (var header in headers) { request.Headers.Add(header.Key, header.Value); } }if (!string.IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; }if (timeout.HasValue) { request.Timeout = timeout.Value * 1000; }if (cookies != null) { request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(cookies); }else{ request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(Cookies); }var v = request.GetResponse() as HttpWebResponse; Cookies.Add(request.CookieContainer.GetCookies(new Uri("http://" + new Uri(url).Host))); Cookies.Add(request.CookieContainer.GetCookies(new Uri("https://" + new Uri(url).Host))); Cookies.Add(v.Cookies);if (Debug) { Console.WriteLine("OK"); }return v; }/// <summary> /// 创建POST方式的HTTP请求 /// </summary> /// <param name="url">请求的URL</param> /// <param name="parameters">随同请求POST的参数名称及参数值字典</param> /// <param name="timeout">请求的超时时间</param> /// <param name="userAgent">请求的客户端浏览器信息,可以为空</param> /// <param name="requestEncoding">发送HTTP请求时所用的编码</param> /// <param name="cookies">随同HTTP请求发送的Cookie信息,如果不需要身份验证可以为空</param> /// <returns></returns> public HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters, Encoding requestEncoding, int? timeout = 300, string userAgent = "", CookieCollection cookies = null, string Referer = "", Dictionary<string, string> headers = null) {if (Debug) { Console.Write("Start Post Url:{0} ", url);foreach (KeyValuePair<string, string> keyValuePair in parameters) { Console.Write(",{0}:{1}", keyValuePair.Key, keyValuePair.Value); } }if (string.IsNullOrEmpty(url)) {throw new ArgumentNullException("url"); }if (requestEncoding == null) {throw new ArgumentNullException("requestEncoding"); } HttpWebRequest request = null;//如果是发送HTTPS请求 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)) { ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult); request = WebRequest.Create(url) as HttpWebRequest; request.ProtocolVersion = HttpVersion.Version10; }else{ request = WebRequest.Create(url) as HttpWebRequest; } request.Method = "POST"; request.Accept = "text/html, application/xhtml+xml, application/json, text/javascript, */*; q=0.01"; request.Referer = Referer; request.Headers["Accept-Language"] = "en-US,en;q=0.5"; request.UserAgent = DefaultUserAgent; request.ContentType = "application/x-www-form-urlencoded"; request.Headers["Pragma"] = "no-cache";if (headers != null) {foreach (var header in headers) { request.Headers.Add(header.Key, header.Value); } }if (cookies != null) { request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(cookies); }else{ request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(Cookies); }if (!string.IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; }else{ request.UserAgent = DefaultUserAgent; }if (timeout.HasValue) { request.Timeout = timeout.Value * 1000; } request.Expect = string.Empty;//如果需要POST数据 if (!(parameters == null || parameters.Count == 0)) {var buffer = CraeteParameter(parameters);byte[] data = requestEncoding.GetBytes(buffer.ToString());using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); } }var v = request.GetResponse() as HttpWebResponse; Cookies.Add(request.CookieContainer.GetCookies(new Uri("http://" + new Uri(url).Host))); Cookies.Add(request.CookieContainer.GetCookies(new Uri("https://" + new Uri(url).Host))); Cookies.Add(v.Cookies);if (Debug) { Console.WriteLine("OK"); }return v; }/// <summary> /// 创建POST方式的HTTP请求 /// </summary> /// <param name="url">请求的URL</param> /// <param name="parameters">随同请求POST的参数名称及参数值字典</param> /// <param name="timeout">请求的超时时间</param> /// <param name="userAgent">请求的客户端浏览器信息,可以为空</param> /// <param name="requestEncoding">发送HTTP请求时所用的编码</param> /// <param name="cookies">随同HTTP请求发送的Cookie信息,如果不需要身份验证可以为空</param> /// <returns></returns> public HttpWebResponse CreatePostHttpResponse(string url, string parameters, Encoding requestEncoding, int? timeout = 300, string userAgent = "", CookieCollection cookies = null, string Referer = "", Dictionary<string, string> headers = null) {if (Debug) { Console.Write("Start Post Url:{0} ,parameters:{1} ", url, parameters); }if (string.IsNullOrEmpty(url)) {throw new ArgumentNullException("url"); }if (requestEncoding == null) {throw new ArgumentNullException("requestEncoding"); } HttpWebRequest request = null;//如果是发送HTTPS请求 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)) { ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult); request = WebRequest.Create(url) as HttpWebRequest; request.ProtocolVersion = HttpVersion.Version10; }else{ request = WebRequest.Create(url) as HttpWebRequest; } request.Method = "POST"; request.Headers.Add("Accept-Language", "zh-CN,en-GB;q=0.5"); request.Method = "POST"; request.Accept = "text/html, application/xhtml+xml, */*"; request.Referer = Referer; request.Headers["Accept-Language"] = "en-US,en;q=0.5"; request.UserAgent = DefaultUserAgent; request.ContentType = "application/x-www-form-urlencoded"; request.Headers["Pragma"] = "no-cache";if (cookies != null) { request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(cookies); }else{ request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(Cookies); }if (headers != null) {foreach (var header in headers) { request.Headers.Add(header.Key, header.Value); } }if (!string.IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; }else{ request.UserAgent = DefaultUserAgent; }if (timeout.HasValue) { request.Timeout = timeout.Value * 1000; } request.Expect = string.Empty;//如果需要POST数据 if (!string.IsNullOrEmpty(parameters)) {byte[] data = requestEncoding.GetBytes(parameters);using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); } }var v = request.GetResponse() as HttpWebResponse; Cookies.Add(request.CookieContainer.GetCookies(new Uri("http://" + new Uri(url).Host))); Cookies.Add(request.CookieContainer.GetCookies(new Uri("https://" + new Uri(url).Host))); Cookies.Add(v.Cookies);if (Debug) { Console.WriteLine("OK"); }return v; }/// <summary> /// 创建POST方式的HTTP请求 /// </summary> /// <param name="url">请求的URL</param> /// <param name="parameters">随同请求POST的参数名称及参数值字典</param> /// <param name="timeout">请求的超时时间</param> /// <param name="userAgent">请求的客户端浏览器信息,可以为空</param> /// <param name="requestEncoding">发送HTTP请求时所用的编码</param> /// <param name="cookies">随同HTTP请求发送的Cookie信息,如果不需要身份验证可以为空</param> /// <returns></returns> public HttpWebResponse CreatePostFileHttpResponse(string url, string filePath, int? timeout = 300, string userAgent = "", CookieCollection cookies = null, string Referer = "", Dictionary<string, string> headers = null) {if (Debug) { Console.Write("Start Post Url:{0} ", url); }if (string.IsNullOrEmpty(url)) {throw new ArgumentNullException("url"); } HttpWebRequest request = null;//如果是发送HTTPS请求 if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)) { ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult); request = WebRequest.Create(url) as HttpWebRequest; request.ProtocolVersion = HttpVersion.Version10; }else{ request = WebRequest.Create(url) as HttpWebRequest; } request.Method = "POST"; request.Accept = "text/html, application/xhtml+xml, application/json, text/javascript, */*; q=0.01"; request.Referer = Referer; request.Headers["Accept-Language"] = "en-US,en;q=0.5"; request.UserAgent = DefaultUserAgent; request.ContentType = "application/x-www-form-urlencoded"; request.Headers["Pragma"] = "no-cache";if (headers != null) {foreach (var header in headers) { request.Headers.Add(header.Key, header.Value); } }if (cookies != null) { request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(cookies); }else{ request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(Cookies); }if (!string.IsNullOrEmpty(userAgent)) { request.UserAgent = userAgent; }else{ request.UserAgent = DefaultUserAgent; }if (timeout.HasValue) { request.Timeout = timeout.Value * 1000; } request.Expect = string.Empty;//如果需要POST数据 if (!string.IsNullOrEmpty(filePath)) {using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read)) { BinaryReader r = new BinaryReader(fs);//时间戳 string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "\r\n");//请求头部信息 StringBuilder sb = new StringBuilder(); sb.Append("--"); sb.Append(strBoundary); sb.Append("\r\n"); sb.Append("Content-Disposition: form-data; name=\""); sb.Append("file"); sb.Append("\"; filename=\""); sb.Append(fs.Name); sb.Append("\""); sb.Append("\r\n"); sb.Append("Content-Type: "); sb.Append("application/octet-stream"); sb.Append("\r\n"); sb.Append("\r\n");string strPostHeader = sb.ToString();byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader); request.ContentType = "multipart/form-data; boundary=" + strBoundary;long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length; request.ContentLength = length;//开始上传时间 DateTime startTime = DateTime.Now;byte[] filecontent = new byte[fs.Length]; fs.Read(filecontent, 0, filecontent.Length);using (Stream stream = request.GetRequestStream()) {//发送请求头部消息 stream.Write(postHeaderBytes, 0, postHeaderBytes.Length); stream.Write(filecontent, 0, filecontent.Length);//添加尾部的时间戳 stream.Write(boundaryBytes, 0, boundaryBytes.Length); } } }var v = request.GetResponse() as HttpWebResponse; Cookies.Add(request.CookieContainer.GetCookies(new Uri("http://" + new Uri(url).Host))); Cookies.Add(request.CookieContainer.GetCookies(new Uri("https://" + new Uri(url).Host))); Cookies.Add(v.Cookies);if (Debug) { Console.WriteLine("OK"); }return v; }public static string CraeteParameter(IDictionary<string, string> parameters) { StringBuilder buffer = new StringBuilder();foreach (string key in parameters.Keys) { buffer.AppendFormat("&{0}={1}", key, parameters[key]); }return buffer.ToString().TrimStart('&'); }private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) {return true; //总是接受 }public string Post(string url, IDictionary<string, string> parameters, Encoding requestEncoding, Encoding responseEncoding, int? timeout = 300, string userAgent = "", CookieCollection cookies = null, string Referer = "", Dictionary<string, string> headers = null) { HttpWebResponse response = CreatePostHttpResponse(url, parameters, requestEncoding, timeout, userAgent, cookies, Referer, headers);try{using (StreamReader reader = new StreamReader(response.GetResponseStream(), responseEncoding)) {return reader.ReadToEnd(); } }catch (Exception) {return null; } }public string Post(string url, string parameters, Encoding requestEncoding, Encoding responseEncoding, int? timeout = 300, string userAgent = "", CookieCollection cookies = null, string Referer = "", Dictionary<string, string> headers = null) { HttpWebResponse response = CreatePostHttpResponse(url, parameters, requestEncoding, timeout, userAgent, cookies, Referer, headers);try{using (StreamReader reader = new StreamReader(response.GetResponseStream(), responseEncoding)) {return reader.ReadToEnd(); } }catch (Exception) {return null; } }public string PostFile(string url, string filePath, Encoding responseEncoding,int? timeout = 300, string userAgent = "", CookieCollection cookies = null, string Referer = "", Dictionary<string, string> headers = null) { HttpWebResponse response = CreatePostFileHttpResponse(url, filePath, timeout, userAgent, cookies, Referer, headers);try{using (StreamReader reader = new StreamReader(response.GetResponseStream(), responseEncoding)) {return reader.ReadToEnd(); } }catch (Exception) {return null; } }public string Get(string url, Encoding responseEncoding, int? timeout = 300, string userAgent = "", CookieCollection cookies = null, string Referer = "", Dictionary<string, string> headers = null) { HttpWebResponse response = CreateGetHttpResponse(url, timeout, userAgent, cookies, Referer, headers);try{using (StreamReader reader = new StreamReader(response.GetResponseStream(), responseEncoding)) {return reader.ReadToEnd(); } }catch (Exception) {return null; } }public byte[] GetFile(string url, out Dictionary<string, string> header, int? timeout = 300, string userAgent = "", CookieCollection cookies = null, string Referer = "", Dictionary<string, string> headers = null) { HttpWebResponse response = CreateGetHttpResponse(url, timeout, userAgent, cookies, Referer, headers); header = new Dictionary<string, string>();foreach (string key in response.Headers.AllKeys) { header.Add(key, response.Headers[key]); }try{ System.IO.Stream st = response.GetResponseStream();byte[] by = new byte[response.ContentLength]; st.Read(by, 0, by.Length); st.Close();return by; }catch (Exception) {return null; }return null; } } }
HttpHelper类
IHttpSend接口声明,抽象出同一交互接口
public interface IHttpSend { string Send(string url, string data); }
代码中Http请求分为4中:普通Get请求,普通Post请求,Post文件上传请求,Get文件下载请求
并且不同请求中,Send方法第二个参数Data包含内容不同
//普通Get请求public class HttpGetRequest : IHttpSend {public string Send(string url, string data) {return new HttpHelper().Get(url, Encoding.UTF8); } }//普通Post请求public class HttpPostRequest : IHttpSend {public string Send(string url, string data) {return new HttpHelper().Post(url, data, Encoding.UTF8, Encoding.UTF8); } }
//Post文件上传请求class HttpPostFileRequest : IHttpSend {public string Send(string url, string data) {return new HttpHelper().PostFile(url, data,Encoding.UTF8); } }//Get文件下载请求 class HttpGetFileRequest : IHttpSend {public string Send(string url, string path) { Dictionary<string, string> header;var bytes = new HttpHelper().GetFile(url, out header);if (header["Content-Type"].Contains("application/json")) {return Encoding.UTF8.GetString(bytes); }else{ Regex regImg = new Regex("\"(?<fileName>.*)\"", RegexOptions.IgnoreCase); MatchCollection matches = regImg.Matches(header["Content-disposition"]);string fileName = matches[0].Groups["fileName"].Value;string filepath = path.TrimEnd('\\') + "\\" + fileName; System.IO.Stream so = new System.IO.FileStream(filepath, System.IO.FileMode.Create); so.Write(bytes, 0, bytes.Length); so.Close(); }return JsonConvert.SerializeObject(header); } }
与微信交互
构建微信返回结果基类
public class OperationResultsBase { public int errcode { get; set; } public string errmsg { get; set; } }
构建统一发送接口,并使用协变,方便构造统一队列
public interface ISend<out T> where T : OperationResultsBase, new() { T Send(); }
构建微信发送基类
public abstract class OperationRequestBase<T, THttp> : ISend<T>where T : OperationResultsBase, new()where THttp : IHttpSend, new() {protected abstract string Url();/// <summary>/// 视同attribute进行简单校验/// </summary>/// <param name="message"></param>/// <returns></returns>private bool Verify(out string message) { message = ""; foreach (var pro in this.GetType().GetProperties()) {var v = pro.GetCustomAttributes(typeof(IVerifyAttribute), true);foreach (IVerifyAttribute verify in pro.GetCustomAttributes(typeof(IVerifyAttribute), true)) { if (!verify.Verify(pro.PropertyType, pro.GetValue(this), out message)) {return false; } } } return true; }/// <summary>/// 格式化URL,替换Token/// </summary>/// <returns></returns>protected string GetUrl() { if (Token.IsTimeOut()) { Token.GetNewToken(); } string url = Url(); if (url.Contains("=ACCESS_TOKEN")) { url = url.Replace("=ACCESS_TOKEN", "=" + Token.GetToken()); } return url; }/// <summary>/// 发送/// </summary>/// <returns></returns>public T Send() { string message = ""; if (!Verify(out message)) {throw new Exception(message); } //string result = new HttpHelper().Post(url, JsonConvert.SerializeObject(this), Encoding.UTF8, Encoding.UTF8); IHttpSend httpSend = new THttp(); string result = HttpSend(httpSend, GetUrl()); return GetDeserializeObject(result); }/// <summary>/// 处理返回结果/// </summary>/// <param name="result"></param>/// <returns></returns>protected virtual T GetDeserializeObject(string result) { return JsonConvert.DeserializeObject<T>(result); }/// <summary>/// 处理发送请求/// </summary>/// <param name="httpSend"></param>/// <param name="url"></param>/// <returns></returns>protected virtual string HttpSend(IHttpSend httpSend, string url) { return httpSend.Send(url, JsonConvert.SerializeObject(this)); } }
基类构造好,后续大部分开发就非常简单了,
需要先构建结果类(如果无特殊字段,可直接使用OperationResultsBase )
构建请求类,继承OperationRequestBase<>类,选择结果类,及发送方式,再构造URL,最后填入所需字段即可
如:开发“部门列表数据"接口
//先构造返回类public class DepartmentListResult :OperationResultsBase {/// <summary>/// 部门列表数据。以部门的order字段从小到大排列/// </summary>/// <returns></returns>public List<DepartmentItem> department { get; set; }public class DepartmentItem {/// <summary>/// 部门id/// </summary>/// <returns></returns>public string id { get; set; }/// <summary>/// 部门名称/// </summary>/// <returns></returns>public string name { get; set; }/// <summary>/// 父亲部门id。根部门为1/// </summary>/// <returns></returns>public string parentid { get; set; } } }//再构造请求类public class DepartmentList : OperationRequestBase<DepartmentListResult,HttpPostRequest>{protected override string Url() {return "https://qyapi.weixin.qq.com/cgi-bin/department/list?access_token=ACCESS_TOKEN"; } }
如:开发“创建部门"接口
//返回值类无//请求类/// <summary> /// 创建部门/// </summary> public class DepartmentCreate : OperationRequestBase<OperationResultsBase,HttpPostRequest> {protected override string Url() { return "https://qyapi.weixin.qq.com/cgi-bin/department/create?access_token=ACCESS_TOKEN"; }/// <summary>/// 部门名称。长度限制为1~64个字符/// </summary>/// <returns></returns>[Length(1,64)] [IsNotNull]public string name { get; set; }/// <summary>/// 父亲部门id。根部门id为1/// </summary>/// <returns></returns>[IsNotNull]public string parentid { get; set; }/// <summary>/// 在父部门中的次序。从1开始,数字越大排序越靠后/// </summary>/// <returns></returns>public string order { get; set; } }
验证
最后在加入加单验证机制,如不为空验证,长度限制
public interface IVerifyAttribute {bool Verify(Type type, object obj,out string message); } public class IsNotNullAttribute : Attribute, IVerifyAttribute {bool IsNotNull { get; set; }string Message { get; set; }public IsNotNullAttribute() { IsNotNull = true; Message = "不能为空"; }public IsNotNullAttribute(bool isNotNull) { IsNotNull = isNotNull; Message = "不能为空"; }public IsNotNullAttribute(bool isNull, string message) { IsNotNull = isNull; Message = message; }public bool Verify(Type type, object obj, out string message) { message = "";if (IsNotNull == false) {return true; }if (obj == null) { message = Message;return false; }if (obj is IList) {if ((obj as IList).Count <= 0) { message = Message;return false; } }return true; } } public class LengthAttribute : Attribute, IVerifyAttribute {int MinLength { get; set; }int MaxLength { get; set; }string Message { get; set; }public LengthAttribute(int minLength, int maxLength) { MinLength = minLength; MaxLength = maxLength; Message = string.Format("字符串长度应在{0}到{1}之间",minLength,maxLength); }public LengthAttribute(int minLength, int maxLength,string message) { MinLength = minLength; MaxLength = maxLength; Message = string.Format(message, minLength, maxLength); }public bool Verify(Type type,object obj,out string message) { message = "";if (type == typeof(string) && obj != null) {if ((obj as string).Length > MaxLength || (obj as string).Length < MinLength) { message = Message;return false; } }return true; } }