WeChatHelper3.1.0.58.dll接口适用所有语言，今天我来讲一下用C#来做个实例调用。

第一步：下载并引用Newtonsoft.Json.dll类库

因为本接口是基于HTTP+JSON的，所有我们先下载c#开源的类库Newtonsoft.Json(下载地址 http://json.codeplex.com/ )

在项目中引用Newtonsoft.Json.dll(根据自己的版本，我用的是VS2017 版本是4.5)

第二步：创建HTTP类

HttpHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
namespace WechatHelper
{class HttpHelper{public string GetData(string url){string data = "";try{HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);request.Method = "GET";HttpWebResponse response = (HttpWebResponse)request.GetResponse();Stream ResponseStream = response.GetResponseStream();StreamReader StreamReader = new StreamReader(ResponseStream, Encoding.GetEncoding("utf-8"));data = StreamReader.ReadToEnd();StreamReader.Close();ResponseStream.Close();}catch (Exception ex){}finally{}return data;}public string GetPostData(string url, string param){string data = "";try{HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);request.Method = "POST";request.ContentType = "application/json;charset=utf-8";if (!string.IsNullOrEmpty(param)){Stream RequestStream = request.GetRequestStream();byte[] bytes = Encoding.UTF8.GetBytes(param);RequestStream.Write(bytes, 0, bytes.Length);RequestStream.Close();}HttpWebResponse response = (HttpWebResponse)request.GetResponse();Stream ResponseStream = response.GetResponseStream();StreamReader StreamReader = new StreamReader(ResponseStream, Encoding.GetEncoding("utf-8"));data = StreamReader.ReadToEnd();StreamReader.Close();ResponseStream.Close();}catch (Exception ex){}finally{}return data;}}
}

第三步：创建JsonHelper类

本类只对聊天记录做处理，其它的可以照此方法。

JsonHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Newtonsoft.Json;
using WechatHelper.RecordObject;
namespace WechatHelper
{class JsonHelper{/// <summary>/// 获取聊天记录数据/// </summary>/// <param name="jsonText">JSON文本数据</param>/// <returns></returns>static public RecordObject.RecordObject GetRecords(string jsonText){RecordObject.RecordObject recordObject= JsonConvert.DeserializeObject<RecordObject.RecordObject>(jsonText);return recordObject;}}
}

第四步：创建聊天记录对象

聊天记录对象是根据聊天记录数据和类型创建的，我们来看一下聊天记录的JSON数据结构：

{"cmdid": 7,"maxid": 5,"count": 75,"status": "ok","qq": "2376140244","data": [
{"localId": 42,"MsgSvrID": "2062239765205091112","StrTalker": "18618087204@chatroom","StrContent": "<?xml version=\"1.0\"?>\n<msg>\n\t<img aeskey=\"611118464e36d48e86c891c79e25b07c\" encryver=\"1\" cdnthumbaeskey=\"611118464e36d48e86c891c79e25b07c\" cdnthumburl=\"3058020100044c304a0201000204be9026a302032f5d0302045938f0b702045fefffb90425617570696d675f383038376264343062646134646465335f31363039353634303839373537020401090a020201000405004c56fb00\" cdnthumblength=\"4043\" cdnthumbheight=\"140\" cdnthumbwidth=\"56\" cdnmidheight=\"0\" cdnmidwidth=\"0\" cdnhdheight=\"0\" cdnhdwidth=\"0\" cdnmidimgurl=\"3058020100044c304a0201000204be9026a302032f5d0302045938f0b702045fefffb90425617570696d675f383038376264343062646134646465335f31363039353634303839373537020401090a020201000405004c56fb00\" length=\"24332\" md5=\"692efd877bce4ad7dc41becca0d2278d\" hevc_mid_size=\"24332\" />\n</msg>\n","CreateTime": 1609564091,"IsSender": 0,"type": 3,"SubType": 0,"CompressContent": "","BytesExtra": {"wxid": "wxid_y7hw81zn588b12","thumb": "keepmoving8\\FileStorage\\Image\\Thumb\\2021-01\\e03c67108d6c39c020c48696dbd36916_t.dat","image": "keepmoving8\\FileStorage\\Image\\2021-01\\4953c7f182c4741eec97c9ab6bfe1eb4.dat","video": ""}},{"localId": 43,"MsgSvrID": "3036343329427015238","StrTalker": "2656683682@chatroom","StrContent": "收满不收弹头40","CreateTime": 1609564122,"IsSender": 0,"type": 1,"SubType": 0,"CompressContent": "","BytesExtra": {"wxid": "wxid_87rw855vmv4h22","thumb": "","image": "","video": ""}},{"localId": 44,"MsgSvrID": "6558585969683208319","StrTalker": "JI282940039","StrContent": "要的滴滴我","CreateTime": 1609564128,"IsSender": 0,"type": 1,"SubType": 0,"CompressContent": "","BytesExtra": {"wxid": "","thumb": "","image": "","video": ""}}]
}

上面记录中有三种记录：

1.群图片消息，群发送的微信ID和图片的地址已显示在扩展数据中。

2.群文本消息，群发送的微信ID显示在扩展数据中。

3.普通好友文本消息，扩展数据都是空。

根据JSON数据结构，我们在c#中构造聊天记录对象模型：

RecordObject.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;/// <summary>
/// 聊天记录对象
/// </summary>
namespace WechatHelper.RecordObject
{/// <summary>/// 聊天记录主要数据/// </summary>public class data{public int localId { get; set; }//记录IDpublic string MsgSvrID { get; set; }//消息IDpublic string StrTalker { get; set; }//群消息public string StrContent { get; set; } //内容public int CreateTime { get; set; }//创建时间public int IsSender { get; set; }//是否自己发送public int type { get; set; }//消息类型public int SubType { get; set; }//子类型public string CompressContent { get; set; } //这里为转账金额信息，有+与-表示：收到与转出   public BytesExtra BytesExtra { get; set; }}/// <summary>/// 聊天记录扩展数据/// </summary>public class BytesExtra{public string wxid { get; set; }//      群消息时发送者微信ID"public string thumb { get; set; }   //     图片类型时缩微图路径"public string image { get; set; }// 图片或视频类型时图片路径"public string mp4 { get; set; }//视频类型时MP4路径"}/// <summary>/// 聊天记录对象/// </summary>public class RecordObject{public int cmdid { get; set; }public int maxid { get; set; }//记录索引public int count { get; set; }//信息条数public string qq { get; set; }//本人QQpublic string status { get; set; }//状态public List<data> data { get; set; }//消息主体数组}
}

第五步：主程序调用

上面步骤都完成了，就等着主程序调用了，我们在主窗体中创建一个 Timer定时器，每3秒中刷新一次聊天记录：

private void timer1_Tick(object sender, EventArgs e){HttpHelper http = new HttpHelper();string data =http.GetData("http://127.0.0.1/?cmdid=7");RecordObject.RecordObject recordObject = JsonHelper.GetRecords(data);foreach(RecordObject.data record in recordObject.data){txt_resault.AppendText(record.StrContent+"\r\n");txt_resault.AppendText("***********************************************************\r\n");}}

看，就是这么简单！

c#调用下载地址(vs2017 .net4.5版本)：https://download.csdn.net/download/keepmoving0407/14010292

也可以进群交流下载：（交流群：561112477 1005923608）

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