asp.net WeChat-Entwicklung (erweiterter Massentext)

Dieser Artikel stellt hauptsächlich den relevanten Inhalt der erweiterten Massen-Textnachrichten in der WeChat-Entwicklung von asp.net vor.

Erklären wir zunächst den Prozess der Massen-Textnachrichten Ich habe es persönlich entwickelt. Bevor Sie mit dem Schreiben von Code beginnen können, muss das Programm wie folgt aussehen:

Anschauen Auf dem Bild können wir auch sehen, dass wir zuerst dieses WeChat-Konto erhalten müssen, um diesen Monat auch einige Nachrichten in Gruppen zu senden. Was die Berechnung angeht: Wenn eine Nachricht erfolgreich in einer Gruppe gesendet wird, wird eine Nachricht in der gespeichert lokale Datenbank, um die Anzahl der Nachrichten zu berechnen (ich glaube, dass dies möglich ist). Wenn mehr als 4 Nachrichten gesendet werden, kann es nicht gesendet werden (ich habe es hier bereits eingeschränkt, da das Dienstkonto nur 4 Nachrichten pro Monat senden kann, und Es ist sinnlos, mehr Nachrichten zu senden, es sei denn, die Vorschaufunktion wird verwendet, um sie einzeln zu senden, aber die Vorschaufunktion kann nur 100 Mal gesendet werden. Möglicherweise können Sie den Entwicklermodus verwenden, um Gruppennachrichten zu senden Mal mehr, denn nachdem ich die Gruppennachricht zweimal gesendet hatte, betrat ich das Backend der offiziellen Website der öffentlichen WeChat-Plattform und sah, dass ich immer noch 4 Nachrichten in einer Gruppe senden konnte, was etwas deprimierend war), das Ziel der Gruppennachricht! Sie können wählen, ob Sie alle Benutzer oder Gruppenbenutzer senden möchten. Um die Anzahl der Gruppennachrichten zu speichern, werde ich hier keine Gruppentextnachrichten testen. Weitere Informationen finden Sie im folgenden Code:

Binden Sie die verbleibenden Anzahl der Gruppennachrichten in diesem Monat

 /// <summary> 
 /// 绑定本月剩余群发条数
 /// </summary>
 private void BindMassCount()
 {
 WxMassService wms = new WxMassService();
 List<WxMassInfo> wxmaslist = wms.GetMonthMassCount();
 //官方微信服务号每月只能群发4条信息，（订阅号每天1条）多余信息，将不会成功推送，这里已经设定为4
 this.lbMassCounts.Text = (4 - int.Parse(wxmaslist.Count.ToString())).ToString();

 if (wxmaslist.Count >= 4)
 {
 this.LinkBtnSubSend.Enabled = false;
 this.LinkBtnSubSend.Attributes.Add("Onclick", "return confirm(&#39;群发信息已达上限！请下月初再试！&#39;)");
 }
 else
 {
 this.LinkBtnSubSend.Enabled = true;
 this.LinkBtnSubSend.Attributes.Add("Onclick", "return confirm(&#39;您确定要群发此条信息？？&#39;)");
 }
 }

Verbindliche Gruppenliste

 /// <summary>
 /// 绑定分组列表
 /// </summary>
 private void BindGroupList()
 {
 WeiXinServer wxs = new WeiXinServer();

 ///从缓存读取accesstoken
 string Access_token = Cache["Access_token"] as string;

 if (Access_token == null)
 {
 //如果为空，重新获取
 Access_token = wxs.GetAccessToken();

 //设置缓存的数据7000秒后过期
 Cache.Insert("Access_token", Access_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
 }

 string Access_tokento = Access_token.Substring(17, Access_token.Length - 37);

 string jsonres = "";

 string content = Cache["AllGroups_content"] as string;

 if (content == null)
 {
 jsonres = "https://api.weixin.qq.com/cgi-bin/groups/get?access_token=" + Access_tokento;

 HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(jsonres);
 myRequest.Method = "GET";
 HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
 StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
 content = reader.ReadToEnd();
 reader.Close();

 //设置缓存的数据7000秒后过期
 Cache.Insert("AllGroups_content", content, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
 }

 //使用前需要引用Newtonsoft.json.dll文件
 JObject jsonObj = JObject.Parse(content);


 int groupsnum = jsonObj["groups"].Count();

 this.DDLGroupList.Items.Clear();//清除

 for (int i = 0; i < groupsnum; i++)
 {
 this.DDLGroupList.Items.Add(new ListItem(jsonObj["groups"][i]["name"].ToString() + "(" + jsonObj["groups"][i]["count"].ToString() + ")", jsonObj["groups"][i]["id"].ToString()));
 }
 }
 /// <summary>
 /// 选择群发对象类型，显示隐藏分组列表项
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void DDLMassType_SelectedIndexChanged(object sender, EventArgs e)
 {
 if (int.Parse(this.DDLMassType.SelectedValue.ToString()) > 0)
 {
 this.DDLGroupList.Visible = true;
 }
 else
 {
  this.DDLGroupList.Visible = false;
 }
 }

Massenversand

 /// <summary>
 /// 群发
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void LinkBtnSubSend_Click(object sender, EventArgs e)
 {
 //根据单选按钮判断类型，发送
 ///如果选择的是文本消息
 if (this.RadioBtnList.SelectedValue.ToString().Equals("0"))
 {
 if (String.IsNullOrWhiteSpace(this.txtwenben.InnerText.ToString().Trim()))
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;请输入您要群发文本内容！&#39;);", true);
  return;
 }
 if (this.txtwenben.InnerText.ToString().Trim().Length<10)
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;文本内容至少需要10个字符以上！&#39;);", true);
  return;
 }

 WxMassService wms = new WxMassService();
 List<WxMassInfo> wxmaslist = wms.GetMonthMassCount();

 if (wxmaslist.Count >= 4)
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;本月可群发消息数量已达上限！&#39;);", true);
  return;
 }
 else
 {


  //如何群发类型为全部用户，根据openID列表群发给全部用户，订阅号不可用，服务号认证后可用
  if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
  {
  StringBuilder sbs = new StringBuilder();
  sbs.Append(GetAllUserOpenIDList());

  WeiXinServer wxs = new WeiXinServer();

  ///从缓存读取accesstoken
  string Access_token = Cache["Access_token"] as string;

  if (Access_token == null)
  {
  //如果为空，重新获取
  Access_token = wxs.GetAccessToken();

  //设置缓存的数据7000秒后过期
  Cache.Insert("Access_token", Access_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
  }

  string Access_tokento = Access_token.Substring(17, Access_token.Length - 37);


  string posturl = "https://api.weixin.qq.com/cgi-bin/message/mass/send?access_token=" + Access_tokento;

  ///群发POST数据示例如下： 
  //  {
  // "touser":[
  // "OPENID1",
  // "OPENID2"
  // ],
  // "msgtype": "text",
  // "text": { "content": "hello from boxer."}
  //}

  string postData = "{\"touser\":[" + sbs.ToString() +
  "],\"msgtype\":\"text\",\"text\":{\"content\":\"" + this.txtwenben.InnerText.ToString() +
  "\"}";


  string tuwenres = wxs.GetPage(posturl, postData);

  //使用前需药引用Newtonsoft.json.dll文件
  JObject jsonObj = JObject.Parse(tuwenres);

  if (jsonObj["errcode"].ToString().Equals("0"))
  {
   //群发成功后，保存记录
  WxMassInfo wmi = new WxMassInfo();

  wmi.ImageUrl = "";
  wmi.type = "文本";
  wmi.contents = this.txtwenben.InnerText.ToString().Trim();
  wmi.title = this.txtwenben.InnerText.ToString().Substring(0, 10) + "...";

  if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
  {
  wmi.massObject = this.DDLMassType.SelectedItem.Text.ToString();
  }
  else
  {
  wmi.massObject = this.DDLGroupList.SelectedItem.Text.ToString();
  }

  wmi.massStatus = "成功";//群发成功之后返回的状态码
  wmi.massMessageID = jsonObj["msg_id"].ToString();//群发成功之后返回的消息ID


  wmi.massDate = System.DateTime.Now.ToString();

  int num = wms.AddWxMassInfo(wmi);

  if (num > 0)
  {
  Session["wmninfo"] = null;
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据已保存！&#39;);location=&#39;WxMassManage.aspx&#39;;", true);
  return;
  }
  else
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据保存失败！&#39;);", true);
  return;
  }
  }
  else
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务提交失败！！&#39;);", true);
  return;
  }
  }
  else
  {
  string group_id = this.DDLGroupList.SelectedValue.ToString();


  WeiXinServer wxs = new WeiXinServer();

  ///从缓存读取accesstoken
  string Access_token = Cache["Access_token"] as string;

  if (Access_token == null)
  {
  //如果为空，重新获取
  Access_token = wxs.GetAccessToken();

  //设置缓存的数据7000秒后过期
  Cache.Insert("Access_token", Access_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
  }

  string Access_tokento = Access_token.Substring(17, Access_token.Length - 37);


  string posturl = "https://api.weixin.qq.com/cgi-bin/message/mass/send?access_token=" + Access_tokento;

  ///群发POST数据示例如下： 
  // {
  // "filter":{
  // "is_to_all":false
  // "group_id":"2"
  // },
  // "text":{
  // "content":"CONTENT"
  // },
  // "msgtype":"text"
  //}
  //}

  string postData = "{\"filter\":{\"is_to_all\":\"false\"\"group_id\":\"" + group_id +
  "\"},\"text\":{\"content\":\"" + this.txtwenben.InnerText.ToString() +
  "\"},\"msgtype\":\"text\"}";


  string tuwenres = wxs.GetPage(posturl, postData);

  //使用前需药引用Newtonsoft.json.dll文件
  JObject jsonObj = JObject.Parse(tuwenres);

  if (jsonObj["errcode"].ToString().Equals("0"))
  {
  //群发成功后，保存记录
  WxMassInfo wmi = new WxMassInfo();

  wmi.ImageUrl = "";
  wmi.type = "文本";
  wmi.contents = this.txtwenben.InnerText.ToString().Trim();
  wmi.title = this.txtwenben.InnerText.ToString().Substring(0, 10) + "...";

  if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
  {
  wmi.massObject = this.DDLMassType.SelectedItem.Text.ToString();
  }
  else
  {
  wmi.massObject = this.DDLGroupList.SelectedItem.Text.ToString();
  }

  wmi.massStatus = "成功";//群发成功之后返回的状态码
  wmi.massMessageID = jsonObj["msg_id"].ToString();//群发成功之后返回的消息ID


  wmi.massDate = System.DateTime.Now.ToString();

  int num = wms.AddWxMassInfo(wmi);

  if (num > 0)
  {
  Session["wmninfo"] = null;
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据已保存！&#39;);location=&#39;WxMassManage.aspx&#39;;", true);
  return;
  }
  else
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据保存失败！&#39;);", true);
  return;
  }
  }
  else
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务提交失败！！&#39;);", true);
  return;
  }
  }

 
 }
 }
 //如果选择的是图文消息
 if (this.RadioBtnList.SelectedValue.ToString().Equals("1"))
 {
 if (String.IsNullOrWhiteSpace(this.lbtuwenmedai_id.Text.ToString().Trim()))
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;请选择或新建图文素材再进行群发！&#39;);", true);
  return;
 }

 WxMassService wms = new WxMassService();

 List<WxMassInfo> wxmaslist = wms.GetMonthMassCount();

 if (wxmaslist.Count >= 4)
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;本月可群发消息数量已达上限！&#39;);", true);
  return;
 }
 else
 {
  
  //如何群发类型为全部用户，根据openID列表群发给全部用户，订阅号不可用，服务号认证后可用
  if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
  {
  StringBuilder sbs = new StringBuilder();
  sbs.Append(GetAllUserOpenIDList());

  WeiXinServer wxs = new WeiXinServer();

  ///从缓存读取accesstoken
  string Access_token = Cache["Access_token"] as string;

  if (Access_token == null)
  {
  //如果为空，重新获取
  Access_token = wxs.GetAccessToken();

  //设置缓存的数据7000秒后过期
  Cache.Insert("Access_token", Access_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
  }

  string Access_tokento = Access_token.Substring(17, Access_token.Length - 37);


  string posturl = "https://api.weixin.qq.com/cgi-bin/message/mass/send?access_token=" + Access_tokento;

  ///群发POST数据示例如下： 
  // {
  // "touser":[
  // "OPENID1",
  // "OPENID2"
  // ],
  // "mpnews":{
  // "media_id":"123dsdajkasd231jhksad"
  // },
  // "msgtype":"mpnews"
  //}

  string postData = "{\"touser\":[" + sbs.ToString() +
  "],\"mpnews\":{\"media_id\":\"" + this.lbtuwenmedai_id.Text.ToString() +
  "\"},\"msgtype\":\"mpnews\"}";


  string tuwenres = wxs.GetPage(posturl, postData);

  //使用前需药引用Newtonsoft.json.dll文件
  JObject jsonObj = JObject.Parse(tuwenres);

  if (jsonObj["errcode"].ToString().Equals("0"))
  {
  Session["media_id"] = null;
  WxMassInfo wmi = new WxMassInfo();
  if (Session["wmninfo"] != null)
  {
  WxMpNewsInfo wmninfo = Session["wmninfo"] as WxMpNewsInfo;

  wmi.title = wmninfo.title.ToString();
  wmi.contents = wmninfo.contents.ToString();
  wmi.ImageUrl = wmninfo.ImageUrl.ToString();


  wmi.type = "图文";

  if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
  {
   wmi.massObject = this.DDLMassType.SelectedItem.Text.ToString();
  }
  else
  {
   wmi.massObject = this.DDLGroupList.SelectedItem.Text.ToString();
  }

  wmi.massStatus = "成功";//群发成功之后返回的状态码
  wmi.massMessageID = jsonObj["msg_id"].ToString();//群发成功之后返回的消息ID

  wmi.massDate = System.DateTime.Now.ToString();

  int num = wms.AddWxMassInfo(wmi);

  if (num > 0)
  {
   Session["wmninfo"] = null;
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据已保存！&#39;);location=&#39;WxMassManage.aspx&#39;;", true);
   return;
  }
  else
  {
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据保存失败！&#39;);", true);
   return;
  }
  }
  else
  {
  wmi.title = "";
  wmi.contents = "";
  wmi.ImageUrl = "";
  wmi.type = "图文";

  if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
  {
   wmi.massObject = this.DDLMassType.SelectedItem.Text.ToString();
  }
  else
  {
   wmi.massObject = this.DDLGroupList.SelectedItem.Text.ToString();
  }

  wmi.massStatus = "成功";//群发成功之后返回的状态码
  wmi.massMessageID = jsonObj["msg_id"].ToString();//群发成功之后返回的消息ID

  wmi.massDate = System.DateTime.Now.ToString();

  int num = wms.AddWxMassInfo(wmi);

  if (num > 0)
  {
   Session["wmninfo"] = null;
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！图文部分数据已保存！&#39;);location=&#39;WxMassManage.aspx&#39;;", true);
   return;
  }
  else
  {
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据保存失败！&#39;);", true);
   return;
  }
  }
  }
  else
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务提交失败！！&#39;);", true);
  return;
  }


  }
  else
  {
  //根据分组进行群发，订阅号和服务号认证后均可用

  string group_id = this.DDLGroupList.SelectedValue.ToString();


  WeiXinServer wxs = new WeiXinServer();

  ///从缓存读取accesstoken
  string Access_token = Cache["Access_token"] as string;

  if (Access_token == null)
  {
  //如果为空，重新获取
  Access_token = wxs.GetAccessToken();

  //设置缓存的数据7000秒后过期
  Cache.Insert("Access_token", Access_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
  }

  string Access_tokento = Access_token.Substring(17, Access_token.Length - 37);


  string posturl = "https://api.weixin.qq.com/cgi-bin/message/mass/send?access_token=" + Access_tokento;

  ///群发POST数据示例如下： 
  // {
  // "filter":{
  // "is_to_all":false
  // "group_id":"2"
  // },
  // "mpnews":{
  // "media_id":"123dsdajkasd231jhksad"
  // },
  // "msgtype":"mpnews"
  //}

  string postData = "{\"filter\":{\"is_to_all\":\"false\"\"group_id\":\""+group_id+
  "\"},\"mpnews\":{\"media_id\":\"" + this.lbtuwenmedai_id.Text.ToString() +
  "\"},\"msgtype\":\"mpnews\"}";


  string tuwenres = wxs.GetPage(posturl, postData);

  //使用前需药引用Newtonsoft.json.dll文件
  JObject jsonObj = JObject.Parse(tuwenres);

  if (jsonObj["errcode"].ToString().Equals("0"))
  {
  Session["media_id"] = null;
  WxMassInfo wmi = new WxMassInfo();
  if (Session["wmninfo"] != null)
  {
  WxMpNewsInfo wmninfo = Session["wmninfo"] as WxMpNewsInfo;

  wmi.title = wmninfo.title.ToString();
  wmi.contents = wmninfo.contents.ToString();
  wmi.ImageUrl = wmninfo.ImageUrl.ToString();


  wmi.type = "图文";

  if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
  {
   wmi.massObject = this.DDLMassType.SelectedItem.Text.ToString();
  }
  else
  {
   wmi.massObject = this.DDLGroupList.SelectedItem.Text.ToString();
  }

  wmi.massStatus = "成功";//群发成功之后返回的状态码
  wmi.massMessageID = jsonObj["msg_id"].ToString();//群发成功之后返回的消息ID

  wmi.massDate = System.DateTime.Now.ToString();

  int num = wms.AddWxMassInfo(wmi);

  if (num > 0)
  {
   Session["wmninfo"] = null;
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据已保存！&#39;);location=&#39;WxMassManage.aspx&#39;;", true);
   return;
  }
  else
  {
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据保存失败！&#39;);", true);
   return;
  }
  }
  else
  {
  wmi.title = "";
  wmi.contents = "";
  wmi.ImageUrl = "";
  wmi.type = "图文";

  if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
  {
   wmi.massObject = this.DDLMassType.SelectedItem.Text.ToString();
  }
  else
  {
   wmi.massObject = this.DDLGroupList.SelectedItem.Text.ToString();
  }

  wmi.massStatus = "成功";//群发成功之后返回的状态码
  wmi.massMessageID = jsonObj["msg_id"].ToString();//群发成功之后返回的消息ID

  wmi.massDate = System.DateTime.Now.ToString();

  int num = wms.AddWxMassInfo(wmi);

  if (num > 0)
  {
   Session["wmninfo"] = null;
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！图文部分数据已保存！&#39;);location=&#39;WxMassManage.aspx&#39;;", true);
   return;
  }
  else
  {
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务已提交成功！！！数据保存失败！&#39;);", true);
   return;
  }
  }
  }
  else
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;群发任务提交失败！！&#39;);", true);
  return;
  }
  }
 }
 }
 }

Vorschau vor dem Senden

/// <summary>
 /// 发送前预览
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void LinkBtnSendPreview_Click(object sender, EventArgs e)
 {
 WeiXinServer wxs = new WeiXinServer();

 ///从缓存读取accesstoken
 string Access_token = Cache["Access_token"] as string;

 if (Access_token == null)
 {
 //如果为空，重新获取
 Access_token = wxs.GetAccessToken();

 //设置缓存的数据7000秒后过期
 Cache.Insert("Access_token", Access_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
 }

 string Access_tokento = Access_token.Substring(17, Access_token.Length - 37);


 string posturl = "https://api.weixin.qq.com/cgi-bin/message/mass/preview?access_token=" + Access_tokento;

 ///如果选择的是文本消息
 if (this.RadioBtnList.SelectedValue.ToString().Equals("0"))
 {
 if (String.IsNullOrWhiteSpace(this.txtwenben.InnerText.ToString().Trim()))
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;请输入您要发送预览的文本内容！&#39;);", true);
  return;
 }
 if (this.txttoUserName.Value.ToString().Trim().Equals("请输入用户微信号"))
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;请输入接收消息的用户微信号！&#39;);", true);
  return;
 }
 //文本消息的json数据{
 // "touser":"OPENID", 可改为对微信号预览，例如towxname：zhangsan
 // "text":{ 
 // "content":"CONTENT" 
 // }, 
 // "msgtype":"text"
 //}
 string postData = "{\"towxname\":\"" + this.txttoUserName.Value.ToString() +
   "\",\"text\":{\"content\":\"" + this.txtwenben.InnerText.ToString() +
   "\"},\"msgtype\":\"text\"}";

 string tuwenres = wxs.GetPage(posturl, postData);

 //使用前需药引用Newtonsoft.json.dll文件
 JObject jsonObj = JObject.Parse(tuwenres);

 if (jsonObj["errcode"].ToString().Equals("0"))
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;发送预览成功！！&#39;);", true);
  return;
 }
 else
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;发送预览失败！！&#39;);", true);
  return;
 }
 }
 //如果选择的是图文消息
 if (this.RadioBtnList.SelectedValue.ToString().Equals("1"))
 {
 if(String.IsNullOrWhiteSpace(this.lbtuwenmedai_id.Text.ToString().Trim()))
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;请选择要预览的图文素材！&#39;);", true);
  return;
 }
 if (this.txttoUserName.Value.ToString().Trim().Equals("请输入用户微信号"))
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;请输入接收消息的用户微信号！&#39;);", true);
  return;
 }
 //图文消息的json数据{
 // "touser":"OPENID", 可改为对微信号预览，例如towxname：zhangsan
  // "mpnews":{ 
  // "media_id":"123dsdajkasd231jhksad" 
  // },
  // "msgtype":"mpnews" 
  //}
 string postData = "{\"towxname\":\"" + this.txttoUserName.Value.ToString() +
  "\",\"mpnews\":{\"media_id\":\"" + this.lbtuwenmedai_id.Text.ToString() +
  "\"},\"msgtype\":\"mpnews\"}";
 
 string tuwenres = wxs.GetPage(posturl, postData);

 //使用前需药引用Newtonsoft.json.dll文件
 JObject jsonObj = JObject.Parse(tuwenres);

 if (jsonObj["errcode"].ToString().Equals("0"))
 {
  Session["media_id"] = null;
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;发送预览成功！！&#39;);", true);
  return;
 }
 else
 {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;发送预览失败！！&#39;);", true);
  return;
 }


 }
 
 }

Der wichtigste Teil besteht darin, die openIDs aller Benutzer abzurufen und sie zu einer zu verketten string:

 /// <summary>
 /// 获取所有微信用户的OpenID
 /// </summary>
 /// <returns></returns>
 protected string GetAllUserOpenIDList()
 {
 StringBuilder sb = new StringBuilder();

 WeiXinServer wxs = new WeiXinServer();

 ///从缓存读取accesstoken
 string Access_token = Cache["Access_token"] as string;

 if (Access_token == null)
 {
 //如果为空，重新获取
 Access_token = wxs.GetAccessToken();

 //设置缓存的数据7000秒后过期
 Cache.Insert("Access_token", Access_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
 }

 string Access_tokento = Access_token.Substring(17, Access_token.Length - 37);

 string jsonres = "";

 string content = Cache["AllUserOpenList_content"] as string;

 if (content == null)
 {
 jsonres = "https://api.weixin.qq.com/cgi-bin/user/get?access_token=" + Access_tokento;

 HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(jsonres);
 myRequest.Method = "GET";
 HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
 StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
 content = reader.ReadToEnd();
 reader.Close();

 //设置缓存的数据7000秒后过期
 Cache.Insert("AllUserOpenList_content", content, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
 }

 //使用前需要引用Newtonsoft.json.dll文件
 JObject jsonObj = JObject.Parse(content);


 if (jsonObj.ToString().Contains("count"))
 {
 int totalnum = int.Parse(jsonObj["count"].ToString());



 for (int i = 0; i < totalnum; i++)
 {
  sb.Append(&#39;"&#39;);
  sb.Append(jsonObj["data"]["openid"][i].ToString());
  sb.Append(&#39;"&#39;);
  sb.Append(",");
 }
 }

 return sb.Remove(sb.ToString().LastIndexOf(","),1).ToString();
 }

Dies ist das Ende. Im nächsten Kapitel wird weiterhin der Gruppenversand von Grafikinformationen erläutert. Denn vor dem Massenversand von Grafikinformationen müssen Sie die Materialien hochladen Erforderlich für die Grafikinformationen und den Erhalt der media_id, daher wird sie in diesem Kapitel nicht vorgestellt. Erstellen Sie ein neues einzelnes Bild und eine Textnachricht und senden Sie sie an eine Gruppe.

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