基于.NET的轻量级微信SDK

时间:2021-10-20 21:10:04

一、前言

特别不喜欢麻烦的一个人,最近碰到了微信开发。下载下来了一些其他人写的微信开发“框架”,但是被恶心到了,实现的太臃肿啦。

最不喜欢的就是把微信返回的xml消息在组装成实体类,所以会比较臃肿,现在都提倡轻量级,所以有什么办法可以避免大量实体类的存在呢。

当然,还有包装的比较繁杂,看完官方API后,再看"框架",让人感觉一头雾水,不够清晰、明了

二、我的实现思路

我的微信SDK(不敢自称框架),最重要的实现2个目标:

1.轻量级,就是要摒弃实体类,尽量少的申明Entity,减少SDK的体量;

2.简单、明了,就是SDK类的划分和官方API保持一致,让人一看就懂你的用意。

用户发送请是首先POST到微信服务器的,然后微信服务器在POST到我的服务器,这个接受的消息是xml,我猜测为什么是xml,而不是更轻量级的json,是为了更好的兼容性,毕竟xml更通用一些(说错了,请指出来)。而我们主动调用微信的一些API时,它返回的是json格式,我靠,要死啊,高大上啊。你们的副总裁张小龙不知道这事吗?好吧,这样其实也可以的。

其实,调用微信的工作原理很简单,没有必要上来就框架什么的,我相信是个合格的程序员都能做出来。

我们的服务器只需要一个GET,和一个POST就可以和微信通信了,从这一点来看,设计的还是比较人性化的,赞一个。GET用于接通微信服务的校验,验证;POST用于接收微信服务器过来的消息,然后将Response组装好返回即可。

三、上代码

好了,废话不多说了。

由于微信服务器Post给我们的是xml消息,返回的是json,所以需要互转。这样就存在3种类型的format,这也是大量的框架定义实体类导致框架不够轻量级的的原因之所在。

实现第一个目标,我主要用到了.net Framework4.0的Dynamic特性,和一个将xml字符串自动转换成Dynamic Object的DynamicXml.cs类,还有一个将json字符串自动转换成Dynamic Object的DynamicJson.cs类

苦苦寻觅,终于让我找到了我想要的。

1.以下是DynamicXml.cs类,文件头有原作者的版权信息。

/*--------------------------------------------------------------------------
* https://www.captechconsulting.com/blog/kevin-hazzard/fluent-xml-parsing-using-cs-dynamic-type-part-1
* 博客园网友 夜の魔王 友情借用此代码,用于微信开发。
* http://www.cnblogs.com/deepleo/
*--------------------------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Dynamic;
using System.Xml.Linq;
using System.Collections; public class DynamicXml : DynamicObject, IEnumerable
{
private readonly List<XElement> _elements; public DynamicXml(string text)
{
var doc = XDocument.Parse(text);
_elements = new List<XElement> { doc.Root };
} protected DynamicXml(XElement element)
{
_elements = new List<XElement> { element };
} protected DynamicXml(IEnumerable<XElement> elements)
{
_elements = new List<XElement>(elements);
} public override bool TryGetMember(GetMemberBinder binder, out object result)
{
result = null;
if (binder.Name == "Value")
result = _elements[0].Value;
else if (binder.Name == "Count")
result = _elements.Count;
else
{
var attr = _elements[0].Attribute(XName.Get(binder.Name));
if (attr != null)
result = attr;
else
{
var items = _elements.Descendants(XName.Get(binder.Name));
if (items == null || items.Count() == 0) return false;
result = new DynamicXml(items);
}
}
return true;
} public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
{
int ndx = (int)indexes[0];
result = new DynamicXml(_elements[ndx]);
return true;
} public IEnumerator GetEnumerator()
{
foreach (var element in _elements)
yield return new DynamicXml(element);
}
}

这个代码我也没仔细看,反正能用,没出过差错。

2.以下是DynamicJson.cs类,文件头有原作者的版权信息

/*--------------------------------------------------------------------------
* DynamicJson
* ver 1.2.0.0 (May. 21th, 2010)
*
* created and maintained by neuecc <ils@neue.cc>
* licensed under Microsoft Public License(Ms-PL)
* http://neue.cc/
* http://dynamicjson.codeplex.com/
* 博客园网友 夜の魔王 友情借用此代码,用于微信开发。
* http://www.cnblogs.com/deepleo/
*--------------------------------------------------------------------------*/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Dynamic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Xml;
using System.Xml.Linq; namespace Codeplex.Data
{
public class DynamicJson : DynamicObject
{
private enum JsonType
{
@string, number, boolean, @object, array, @null
} // public static methods /// <summary>from JsonSring to DynamicJson</summary>
public static dynamic Parse(string json)
{
return Parse(json, Encoding.Unicode);
} /// <summary>from JsonSring to DynamicJson</summary>
public static dynamic Parse(string json, Encoding encoding)
{
using (var reader = JsonReaderWriterFactory.CreateJsonReader(encoding.GetBytes(json), XmlDictionaryReaderQuotas.Max))
{
return ToValue(XElement.Load(reader));
}
} /// <summary>from JsonSringStream to DynamicJson</summary>
public static dynamic Parse(Stream stream)
{
using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, XmlDictionaryReaderQuotas.Max))
{
return ToValue(XElement.Load(reader));
}
} /// <summary>from JsonSringStream to DynamicJson</summary>
public static dynamic Parse(Stream stream, Encoding encoding)
{
using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, encoding, XmlDictionaryReaderQuotas.Max, _ => { }))
{
return ToValue(XElement.Load(reader));
}
} /// <summary>create JsonSring from primitive or IEnumerable or Object({public property name:property value})</summary>
public static string Serialize(object obj)
{
return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(GetJsonType(obj)), CreateJsonNode(obj)));
} // private static methods private static dynamic ToValue(XElement element)
{
var type = (JsonType)Enum.Parse(typeof(JsonType), element.Attribute("type").Value);
switch (type)
{
case JsonType.boolean:
return (bool)element;
case JsonType.number:
return (double)element;
case JsonType.@string:
return (string)element;
case JsonType.@object:
case JsonType.array:
return new DynamicJson(element, type);
case JsonType.@null:
default:
return null;
}
} private static JsonType GetJsonType(object obj)
{
if (obj == null) return JsonType.@null; switch (Type.GetTypeCode(obj.GetType()))
{
case TypeCode.Boolean:
return JsonType.boolean;
case TypeCode.String:
case TypeCode.Char:
case TypeCode.DateTime:
return JsonType.@string;
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
case TypeCode.UInt16:
case TypeCode.UInt32:
case TypeCode.UInt64:
case TypeCode.Single:
case TypeCode.Double:
case TypeCode.Decimal:
case TypeCode.SByte:
case TypeCode.Byte:
return JsonType.number;
case TypeCode.Object:
return (obj is IEnumerable) ? JsonType.array : JsonType.@object;
case TypeCode.DBNull:
case TypeCode.Empty:
default:
return JsonType.@null;
}
} private static XAttribute CreateTypeAttr(JsonType type)
{
return new XAttribute("type", type.ToString());
} private static object CreateJsonNode(object obj)
{
var type = GetJsonType(obj);
switch (type)
{
case JsonType.@string:
case JsonType.number:
return obj;
case JsonType.boolean:
return obj.ToString().ToLower();
case JsonType.@object:
return CreateXObject(obj);
case JsonType.array:
return CreateXArray(obj as IEnumerable);
case JsonType.@null:
default:
return null;
}
} private static IEnumerable<XStreamingElement> CreateXArray<T>(T obj) where T : IEnumerable
{
return obj.Cast<object>()
.Select(o => new XStreamingElement("item", CreateTypeAttr(GetJsonType(o)), CreateJsonNode(o)));
} private static IEnumerable<XStreamingElement> CreateXObject(object obj)
{
return obj.GetType()
.GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Select(pi => new { Name = pi.Name, Value = pi.GetValue(obj, null) })
.Select(a => new XStreamingElement(a.Name, CreateTypeAttr(GetJsonType(a.Value)), CreateJsonNode(a.Value)));
} private static string CreateJsonString(XStreamingElement element)
{
using (var ms = new MemoryStream())
using (var writer = JsonReaderWriterFactory.CreateJsonWriter(ms, Encoding.Unicode))
{
element.WriteTo(writer);
writer.Flush();
return Encoding.Unicode.GetString(ms.ToArray());
}
} // dynamic structure represents JavaScript Object/Array readonly XElement xml;
readonly JsonType jsonType; /// <summary>create blank JSObject</summary>
public DynamicJson()
{
xml = new XElement("root", CreateTypeAttr(JsonType.@object));
jsonType = JsonType.@object;
} private DynamicJson(XElement element, JsonType type)
{
Debug.Assert(type == JsonType.array || type == JsonType.@object); xml = element;
jsonType = type;
} public bool IsObject { get { return jsonType == JsonType.@object; } } public bool IsArray { get { return jsonType == JsonType.array; } } /// <summary>has property or not</summary>
public bool IsDefined(string name)
{
return IsObject && (xml.Element(name) != null);
} /// <summary>has property or not</summary>
public bool IsDefined(int index)
{
return IsArray && (xml.Elements().ElementAtOrDefault(index) != null);
} /// <summary>delete property</summary>
public bool Delete(string name)
{
var elem = xml.Element(name);
if (elem != null)
{
elem.Remove();
return true;
}
else return false;
} /// <summary>delete property</summary>
public bool Delete(int index)
{
var elem = xml.Elements().ElementAtOrDefault(index);
if (elem != null)
{
elem.Remove();
return true;
}
else return false;
} /// <summary>mapping to Array or Class by Public PropertyName</summary>
public T Deserialize<T>()
{
return (T)Deserialize(typeof(T));
} private object Deserialize(Type type)
{
return (IsArray) ? DeserializeArray(type) : DeserializeObject(type);
} private dynamic DeserializeValue(XElement element, Type elementType)
{
var value = ToValue(element);
if (value is DynamicJson)
{
value = ((DynamicJson)value).Deserialize(elementType);
}
return Convert.ChangeType(value, elementType);
} private object DeserializeObject(Type targetType)
{
var result = Activator.CreateInstance(targetType);
var dict = targetType.GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Where(p => p.CanWrite)
.ToDictionary(pi => pi.Name, pi => pi);
foreach (var item in xml.Elements())
{
PropertyInfo propertyInfo;
if (!dict.TryGetValue(item.Name.LocalName, out propertyInfo)) continue;
var value = DeserializeValue(item, propertyInfo.PropertyType);
propertyInfo.SetValue(result, value, null);
}
return result;
} private object DeserializeArray(Type targetType)
{
if (targetType.IsArray) // Foo[]
{
var elemType = targetType.GetElementType();
dynamic array = Array.CreateInstance(elemType, xml.Elements().Count());
var index = 0;
foreach (var item in xml.Elements())
{
array[index++] = DeserializeValue(item, elemType);
}
return array;
}
else // List<Foo>
{
var elemType = targetType.GetGenericArguments()[0];
dynamic list = Activator.CreateInstance(targetType);
foreach (var item in xml.Elements())
{
list.Add(DeserializeValue(item, elemType));
}
return list;
}
} // Delete
public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
{
result = (IsArray)
? Delete((int)args[0])
: Delete((string)args[0]);
return true;
} // IsDefined, if has args then TryGetMember
public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
{
if (args.Length > 0)
{
result = null;
return false;
} result = IsDefined(binder.Name);
return true;
} // Deserialize or foreach(IEnumerable)
public override bool TryConvert(ConvertBinder binder, out object result)
{
if (binder.Type == typeof(IEnumerable) || binder.Type == typeof(object[]))
{
var ie = (IsArray)
? xml.Elements().Select(x => ToValue(x))
: xml.Elements().Select(x => (dynamic)new KeyValuePair<string, object>(x.Name.LocalName, ToValue(x)));
result = (binder.Type == typeof(object[])) ? ie.ToArray() : ie;
}
else
{
result = Deserialize(binder.Type);
}
return true;
} private bool TryGet(XElement element, out object result)
{
if (element == null)
{
result = null;
return false;
} result = ToValue(element);
return true;
} public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
{
return (IsArray)
? TryGet(xml.Elements().ElementAtOrDefault((int)indexes[0]), out result)
: TryGet(xml.Element((string)indexes[0]), out result);
} public override bool TryGetMember(GetMemberBinder binder, out object result)
{
return (IsArray)
? TryGet(xml.Elements().ElementAtOrDefault(int.Parse(binder.Name)), out result)
: TryGet(xml.Element(binder.Name), out result);
} private bool TrySet(string name, object value)
{
var type = GetJsonType(value);
var element = xml.Element(name);
if (element == null)
{
xml.Add(new XElement(name, CreateTypeAttr(type), CreateJsonNode(value)));
}
else
{
element.Attribute("type").Value = type.ToString();
element.ReplaceNodes(CreateJsonNode(value));
} return true;
} private bool TrySet(int index, object value)
{
var type = GetJsonType(value);
var e = xml.Elements().ElementAtOrDefault(index);
if (e == null)
{
xml.Add(new XElement("item", CreateTypeAttr(type), CreateJsonNode(value)));
}
else
{
e.Attribute("type").Value = type.ToString();
e.ReplaceNodes(CreateJsonNode(value));
} return true;
} public override bool TrySetIndex(SetIndexBinder binder, object[] indexes, object value)
{
return (IsArray)
? TrySet((int)indexes[], value)
: TrySet((string)indexes[], value);
} public override bool TrySetMember(SetMemberBinder binder, object value)
{
return (IsArray)
? TrySet(int.Parse(binder.Name), value)
: TrySet(binder.Name, value);
} public override IEnumerable<string> GetDynamicMemberNames()
{
return (IsArray)
? xml.Elements().Select((x, i) => i.ToString())
: xml.Elements().Select(x => x.Name.LocalName);
} /// <summary>Serialize to JsonString</summary>
public override string ToString()
{
// <foo type="null"></foo> is can't serialize. replace to <foo type="null" />
foreach (var elem in xml.Descendants().Where(x => x.Attribute("type").Value == "null"))
{
elem.RemoveNodes();
}
return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(jsonType), xml.Elements()));
}
}
}

这个代码我也依旧没仔细看,反正也能用,没出过差错。

这个最核心的拦路虎解决了,后面的事情就顺理成章的进行啦。

      3.基础支持API包装

/*--------------------------------------------------------------------------
* BasicAPI.cs
*Auth:deepleo
* Date:2013.12.31
* Email:2586662969@qq.com
*--------------------------------------------------------------------------*/ using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Http;
using Codeplex.Data;
using System.IO; namespace Deepleo.Weixin.SDK
{
/// <summary>
/// 对应微信API的 "基础支持"
/// </summary>
public class BasicAPI
{
/// <summary>
/// 检查签名是否正确:
/// http://mp.weixin.qq.com/wiki/index.php?title=%E6%8E%A5%E5%85%A5%E6%8C%87%E5%8D%97
/// </summary>
/// <param name="signature"></param>
/// <param name="timestamp"></param>
/// <param name="nonce"></param>
/// <param name="token">AccessToken</param>
/// <returns>
/// true: check signature success
/// false: check failed, 非微信官方调用!
/// </returns>
public static bool CheckSignature(string signature, string timestamp, string nonce, string token, out string ent)
{
var arr = new[] { token, timestamp, nonce }.OrderBy(z => z).ToArray();
var arrString = string.Join("", arr);
var sha1 = System.Security.Cryptography.SHA1.Create();
var sha1Arr = sha1.ComputeHash(Encoding.UTF8.GetBytes(arrString));
StringBuilder enText = new StringBuilder();
foreach (var b in sha1Arr)
{
enText.AppendFormat("{0:x2}", b);
}
ent = enText.ToString();
return signature == enText.ToString();
} /// <summary>
/// 获取AccessToken
/// http://mp.weixin.qq.com/wiki/index.php?title=%E8%8E%B7%E5%8F%96access_token
/// </summary>
/// <param name="grant_type"></param>
/// <param name="appid"></param>
/// <param name="secrect"></param>
/// <returns>access_toke</returns>
public static dynamic GetAccessToken( string appid, string secrect)
{
var url = string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type={0}&appid={1}&secret={2}", "client_credential", appid, secrect);
var client = new HttpClient();
var result = client.GetAsync(url).Result;
if (!result.IsSuccessStatusCode) return string.Empty;
var token = DynamicJson.Parse(result.Content.ReadAsStringAsync().Result);
return token;
} /// <summary>
/// 上传多媒体文件
/// http://mp.weixin.qq.com/wiki/index.php?title=%E4%B8%8A%E4%BC%A0%E4%B8%8B%E8%BD%BD%E5%A4%9A%E5%AA%92%E4%BD%93%E6%96%87%E4%BB%B6
/// 1.上传的媒体文件限制:
///图片(image) : 1MB,支持JPG格式
///语音(voice):1MB,播放长度不超过60s,支持MP4格式
///视频(video):10MB,支持MP4格式
///缩略图(thumb):64KB,支持JPG格式
///2.媒体文件在后台保存时间为3天,即3天后media_id失效
/// </summary>
/// <param name="token"></param>
/// <param name="type"></param>
/// <param name="file"></param>
/// <returns>media_id</returns>
public static string UploadMedia(string token, string type, string file)
{
var url = string.Format("http://api.weixin.qq.com/cgi-bin/media/upload?access_token={0}&type={1}&filename={2}", token, type, Path.GetFileName(file));
var client = new HttpClient();
var result = client.PostAsync(url, new StreamContent(new FileStream(file, FileMode.Open, FileAccess.Read)));
if (!result.Result.IsSuccessStatusCode) return string.Empty;
var media = DynamicJson.Parse(result.Result.Content.ReadAsStringAsync().Result);
return media.media_id;
} }
}

4.发送消息包装

/*--------------------------------------------------------------------------
* SendMessageAPI.cs
*Auth:deepleo
* Date:2013.12.31
* Email:2586662969@qq.com
*--------------------------------------------------------------------------*/ using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Codeplex.Data;
using System.Net;
using System.Net.Http; namespace Deepleo.Weixin.SDK
{
/// <summary>
/// 对应微信API的 "发送消息”
/// </summary>
public class SendMessageAPI
{
/// <summary>
/// 被动回复消息
/// </summary>
/// <param name="message">微信服务器推送的消息</param>
/// <param name="executor">用户自定义的消息执行者</param>
/// <returns></returns>
public static string Relay(WeixinMessage message, IWeixinExecutor executor)
{
return executor.Execute(message);
} /// <summary>
/// 主动发送客服消息
/// http://mp.weixin.qq.com/wiki/index.php?title=%E5%8F%91%E9%80%81%E5%AE%A2%E6%9C%8D%E6%B6%88%E6%81%AF
/// 当用户主动发消息给公众号的时候
/// 开发者在一段时间内(目前为24小时)可以调用客服消息接口,在24小时内不限制发送次数。
/// </summary>
/// <param name="token"></param>
/// <param name="msg">json格式的消息,具体格式请参考微信官方API</param>
/// <returns></returns>
public static bool Send(string token, string msg)
{
var client = new HttpClient();
var task = client.PostAsync(string.Format("https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={0}", token), new StringContent(msg)).Result;
return task.IsSuccessStatusCode;
}
}
}

5.其他代码就不一一贴出来了。可以在文章最后自行下载完整代码查阅。

6.处理与微信服务器通信的WeixinController.cs,WeixinExecutor.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;
using System.Xml.Linq;
using Deepleo.Weixin.SDK;
using Deepleo.NewTon.Web.Services;
using System.Xml;
using Deepleo.NewTon.Framework.Services.Admin;
using Deepleo.Log; namespace Deepleo.NewTon.Web.Controllers
{
public class WeixinController : Controller
{
public WeixinController()
{
} /// <summary>
/// 微信后台验证地址(使用Get),微信后台的“接口配置信息”的Url
/// </summary>
[HttpGet]
[ActionName("Index")]
public ActionResult Get(string signature, string timestamp, string nonce, string echostr)
{
var token = new SettingsService().Get().Token;
if (string.IsNullOrEmpty(_token)) return Content("请先设置Token!");
var ent = "";
if (!BasicAPI.CheckSignature(signature, timestamp, nonce, _token, out ent))
{
new WeixinLogService().Create(new Framework.Entities.WeixinLog("get(failed)", string.Format("(get weixin)signature:{0},timestamp:{1},nonce:{2},echostr:{3},ent:{4},token:{5}",
signature, timestamp, nonce, echostr, ent, _token)));
return Content("参数错误!");
} return Content(echostr); //返回随机字符串则表示验证通过
} /// <summary>
/// 用户发送消息后,微信平台自动Post一个请求到这里,并等待响应XML。
/// </summary>
[HttpPost]
[ActionName("Index")]
public ActionResult Post(string signature, string timestamp, string nonce, string echostr)
{ WeixinMessage message = null;
using (var streamReader = new StreamReader(Request.InputStream))
{
message = AcceptMessageAPI.Parse(streamReader.ReadToEnd());
}
var response = new WeixinExecutor().Execute(message);
return new ContentResult
{
Content = response,
ContentType = "text/xml",
ContentEncoding = System.Text.UTF8Encoding.UTF8
};
} }
}
/*--------------------------------------------------------------------------
* WeixinExecutor.cs
*Auth:deepleo
* Date:2013.12.31
* Email:2586662969@qq.com
*--------------------------------------------------------------------------*/ using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Deepleo.Weixin.SDK;
using System.Text;
using System.Text.RegularExpressions; namespace Deepleo.Weixin
{
public class WeixinExecutor : IWeixinExecutor
{
public WeixinExecutor()
{
} public string Execute(WeixinMessage message)
{
var result = "";
string openId = message.Body.FromUserName.Value;
var myUserName = message.Body.ToUserName.Value;
switch (message.Type)
{
case WeixinMessageType.Text:
string userMessage = message.Body.Content.Value;
result = RepayText(openId, myUserName, "欢迎使用");
break;
case WeixinMessageType.Event:
string eventType = message.Body.Event.Value.ToLower();
string eventKey = message.Body.EventKey.Value;
switch (eventType)
{
case "subscribe":
result = RepayText(openId, myUserName, "欢迎订阅");
break;
case "unsubscribe":
result = RepayText(openId, myUserName, "欢迎再来");
break;
case "scan":
result = RepayText(openId, myUserName, "欢迎使用");
break;
case "location"://用户进入应用时记录用户地理位置
#region location
var lat = message.Body.Latitude.Value.ToString();
var lng = message.Body.Longitude.Value.ToString();
var pcn = message.Body.Precision.Value.ToString(); #endregion
break;
case "click":
switch (eventKey)//refer to: Recources/menu.json
{
case "myaccount":
#region 我的账户
result = RepayText(openId, myUserName, "我的账户.");
#endregion
break;
default:
result = string.Format("<xml><ToUserName><![CDATA[{0}]]></ToUserName>" +
"<FromUserName><![CDATA[{1}]]></FromUserName>" +
"<CreateTime>{2}</CreateTime>" +
"<MsgType><![CDATA[text]]></MsgType>" +
"<Content><![CDATA[{3}]]></Content>" + "</xml>",
openId, myUserName, DateTime.Now.ToBinary(), "没有响应菜单事件");
break;
}
break;
}
break;
default:
result = string.Format("<xml><ToUserName><![CDATA[{0}]]></ToUserName>" +
"<FromUserName><![CDATA[{1}]]></FromUserName>" +
"<CreateTime>{2}</CreateTime>" +
"<MsgType><![CDATA[text]]></MsgType>" +
"<Content><![CDATA[{3}]]></Content>" + "</xml>",
openId, myUserName, DateTime.Now.ToBinary(), string.Format("未处理消息类型:{0}", message.Type));
break;
}
return result;
} private string RepayText(string toUserName, string fromUserName, string content)
{
return string.Format("<xml><ToUserName><![CDATA[{0}]]></ToUserName>" +
"<FromUserName><![CDATA[{1}]]></FromUserName>" +
"<CreateTime>{2}</CreateTime>" +
"<MsgType><![CDATA[text]]></MsgType>" +
"<Content><![CDATA[{3}]]></Content>" + "</xml>",
toUserName, fromUserName, DateTime.Now.ToBinary(), content);
}
private string RepayNews(string toUserName, string fromUserName, List<WeixinNews> news)
{
var couponesBuilder = new StringBuilder();
couponesBuilder.Append(string.Format("<xml><ToUserName><![CDATA[{0}]]></ToUserName>" +
"<FromUserName><![CDATA[{1}]]></FromUserName>" +
"<CreateTime>{2}</CreateTime>" +
"<MsgType><![CDATA[news]]></MsgType>" +
"<ArticleCount>{3}</ArticleCount><Articles>",
toUserName, fromUserName,
DateTime.Now.ToBinary(),
news.Count
));
foreach (var c in news)
{
couponesBuilder.Append(string.Format("<item><Title><![CDATA[{0}]]></Title>" +
"<Description><![CDATA[{1}]]></Description>" +
"<PicUrl><![CDATA[{2}]]></PicUrl>" +
"<Url><![CDATA[{3}]]></Url>" +
"</item>",
c.Title, c.Description, c.PicUrl, c.Url
));
}
couponesBuilder.Append("</Articles></xml>");
return couponesBuilder.ToString();
} }
public class WeixinNews
{
public string Title { set; get; }
public string Description { set; get; }
public string PicUrl { set; get; }
public string Url { set; get; }
}
}

Github在线浏览:https://github.com/night-king/weixinSDK