asp.net微信开发（高级群发图文）

上一篇介绍了如何群发文本消息，本篇将介绍如何群发图文信息，上传图文信息所需的素材，界面如下：

我们先看从素材库中获取图文素材的代码，界面：

素材列表，我是使用的repeater控件，

前台代码如下：

 <!--弹出选择素材窗口-->
  <div id="shownewgroup">
  <div class="closeLogin" style="height:40px; background-color:#ddd9ff; line-height:40px;"><span style="float:left; color:#000; font-size:14px; text-indent:5px;">选择素材</span>
  <span style="float:left;margin-left:20px;"><a href="WxNewTuWen.aspx" style="color:red;" onclick="hrefurl();" class="hrefurl">新建图文素材</a></span>
  <a class="closeloginpage"><img src="images/close1.png" alt="" /></a>  </div>
  
  <div style="height:455px; width:100%;">
  <asp:UpdatePanel ID="UpdatePanel2" runat="server">
   <ContentTemplate>
    <div style="width:100%; height:35px; margin:10px;"><asp:LinkButton ID="LinkBtnSelect" runat="server" OnClick="LinkBtnSelect_Click" ><div style="background-image:url('images/buttonbg.png'); width:111px; height:35px; float:left; line-height:35px; font-weight:bold; text-align:center;color:#fff;">确认选择</div></asp:LinkButton>
    <span style="float:left;margin-left:20px;"><asp:LinkButton ID="LinkbtnRefresh" CssClass="LinkbtnRefresh" runat="server" OnClick="LinkbtnRefresh_Click"><div style="background-image:url('images/buttonbg.png'); width:111px; height:35px; line-height:35px; font-weight:bold; text-align:center;color:#fff;">刷新</div></asp:LinkButton></span>
    <span style="float:left;margin-left:20px;"><asp:LinkButton ID="LinkBtnDelete" CssClass="LinkbtnRefresh" runat="server" OnClick="LinkBtnDelete_Click"><div style="background-image:url('images/buttonbg.png'); width:111px; height:35px; line-height:35px; font-weight:bold; text-align:center;color:#fff;">删除素材</div></asp:LinkButton></span>
    </div>
  <div style="word-wrap:break-word;" id="lbnewssucai" runat="server">
   <asp:Repeater ID="Repeatersucailist" runat="server" OnItemDataBound="Repeatersucailist_ItemDataBound">
   <ItemTemplate>
    <table style="width:100%; border-top:1px solid #edc9df; border-collapse:collapse; font-size:12px;" >
    <tr>
     <td style="width:100px;"><asp:Image ID="ImageUrl" CssClass="fenmianstyle2" runat="server" /></td>
     <td style="text-align:left; width:470px; ">
     <asp:Repeater ID="Repeatersucailist2" runat="server">
      <ItemTemplate>
      <ul style="margin:0px;padding:0px;">
       <li><%# Eval("title") %></li>
      </ul>
      </ItemTemplate>
     </asp:Repeater>
     </td>
     <td style="width:130px;">
     <asp:Label ID="lbUpate_time" runat="server" Text="Label"></asp:Label>
     </td>
     <td style="width:50px; text-align:center;">
     <asp:CheckBox ID="CheckIn" runat="server" />
     <asp:Label ID="lbmedia_id" runat="server" Visible="false" Text=""></asp:Label>
     </td>
    </tr>
    </table>
   </ItemTemplate> 
   </asp:Repeater>
   <div style="font-size:14px; height:30px; line-height:30px; text-indent:10px; border-top:1px solid #ced9df;">
   <span style="float:left;">本类型素材总数量为：</span><span style="float:left; color:red;"><asp:Label ID="lbtotal_count" runat="server" Text="0"></asp:Label></span>  
   <span style="float:left; margin-left:20px;">本次获取的素材数量为：</span><span style="float:left; color:red;"><asp:Label ID="lbitem_count" runat="server" Text="0"></asp:Label></span>
   </div>
  </div>
   </ContentTemplate>
  </asp:UpdatePanel>
  </div>
 </div>
 <div id="shownewgroupzhezhaoceng"></div>

后台代码如下：

 /// <summary>
 /// 绑定图文素材列表
 /// </summary>
 private void BindNewsSucaiList()
 {
  WeiXinServer wxs = new WeiXinServer();
  string res = "";
  ///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/material/batchget_material?access_token=" + Access_tokento;
  //POST数据例子： POST数据例子：{"type":TYPE,"offset":OFFSET,"count":COUNT}
  string postData = "{\"type\":\"news\",\"offset\":\"0\",\"count\":\"20\"}";
  res = wxs.GetPage(posturl, postData);
  //使用前需要引用Newtonsoft.json.dll文件
  JObject jsonObj = JObject.Parse(res);
  int groupsnum = jsonObj["item"].Count();
  List<WxNewsSucaiIteminfo> newssucaiitemlist = new List<WxNewsSucaiIteminfo>();
  List<WxNewsSuCaiItemlistinfo> WxNewsSuCaiItemlist = new List<WxNewsSuCaiItemlistinfo>();
  for (int i = 0; i < groupsnum; i++)
  {
  WxNewsSucaiIteminfo newssucaiitem = new WxNewsSucaiIteminfo();
  newssucaiitem.media_id = jsonObj["item"][i]["media_id"].ToString();
  newssucaiitem.update_time = jsonObj["item"][i]["update_time"].ToString();
  newssucaiitem.total_count = jsonObj["total_count"].ToString();
  newssucaiitem.item_count = jsonObj["item_count"].ToString();
  newssucaiitemlist.Add(newssucaiitem);
  int news_itemcount = jsonObj["item"][i]["content"]["news_item"].Count();
  if (news_itemcount > 0)
  {
   for (int j = 0; j < news_itemcount; j++)
   {
   WxNewsSuCaiItemlistinfo wnscilinfo = new WxNewsSuCaiItemlistinfo();
   wnscilinfo.title = jsonObj["item"][i]["content"]["news_item"][j]["title"].ToString();
   wnscilinfo.thumb_media_id = jsonObj["item"][i]["content"]["news_item"][j]["thumb_media_id"].ToString();
   wnscilinfo.show_cover_pic = int.Parse(jsonObj["item"][i]["content"]["news_item"][j]["show_cover_pic"].ToString());
   wnscilinfo.author = jsonObj["item"][i]["content"]["news_item"][j]["author"].ToString();
   wnscilinfo.digest = jsonObj["item"][i]["content"]["news_item"][j]["digest"].ToString();
   wnscilinfo.content = jsonObj["item"][i]["content"]["news_item"][j]["content"].ToString();
   wnscilinfo.url = jsonObj["item"][i]["content"]["news_item"][j]["url"].ToString();
   wnscilinfo.content_source_url = jsonObj["item"][i]["content"]["news_item"][j]["content_source_url"].ToString();
   wnscilinfo.media_id = newssucaiitem.media_id.ToString();
   WxNewsSuCaiItemlist.Add(wnscilinfo);
   }
  }
  }
  Session["WxNewsSuCaiItemlist"] = WxNewsSuCaiItemlist;
  this.Repeatersucailist.DataSource = newssucaiitemlist;
  this.Repeatersucailist.DataBind();
 }

再来看看，新建单图文信息界面：

新建单图文上传封面，删除封面的代码如下：

 /// <summary>
 /// 
 /// </summary>上传图片文件
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void LinkBtnFileUploadImg_Click(object sender, EventArgs e)
 {
  if (this.FileUploadImg.HasFile)
  {
  string fileContentType = FileUploadImg.PostedFile.ContentType;
  if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/png" || fileContentType == "image/x-png" || fileContentType == "image/jpeg"
   || fileContentType == "image/pjpeg")
  {
   int fileSize = this.FileUploadImg.PostedFile.ContentLength;
   if (fileSize <=2097152)
   {
   string fileName = this.FileUploadImg.PostedFile.FileName; 
   // 客户端文件路径
   string filepath = FileUploadImg.PostedFile.FileName; //得到的是文件的完整路径,包括文件名，如：C:\Documents and Settings\Administrator\My Documents\My Pictures\20022775_m.jpg 
   //string filepath = FileUpload1.FileName;  //得到上传的文件名20022775_m.jpg 
   string filename = filepath.Substring(filepath.LastIndexOf("\\") + 1);//20022775_m.jpg 
   string serverpath = Server.MapPath("~/WeiXinImg/") + filename;//取得文件在服务器上保存的位置C:\Inetpub\wwwroot\WebSite1\images\20022775_m.jpg 
   this.ImgTuWen.ImageUrl = "~/WeiXinImg/" + FileUploadImg.FileName;
   this.ImgTuWen2.Visible = true;
   this.ImgTuWen2.ImageUrl = "~/WeiXinImg/" + FileUploadImg.FileName;
   this.FileUploadImg.PostedFile.SaveAs(serverpath);//将上传的文件另存为 
   this.LinkBtnDeleteImg.Visible = true;
   Session["fileNameimg"] = this.FileUploadImg.PostedFile.FileName;
   //上传临时图片素材至微信服务器，3天后微信服务器会自动删除
   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);
   //WebClient wx_upload = new WebClient();
   //wx_upload.Credentials = CredentialCache.DefaultCredentials;
   string url = string.Format("http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token={0}&type={1}", Access_tokento, "image");
   string result = HttpUploadFile(url, serverpath);
   if (result.Contains("media_id"))
   {
    //使用前需要引用Newtonsoft.json.dll文件
    JObject jsonObj = JObject.Parse(result);
    Session["imgmedia_id"] = jsonObj["media_id"].ToString();
   }
   Response.Write("<script>alert('上传图片成功！')</script>");
   }
   else
   {
   Response.Write("<script>alert('上传文件不能大于2M！')</script>");
   }
   
  }
  else
  {
   Response.Write("<script>alert('只支持BMP,GIF,PNG,JPG格式的图片！')</script>");
  }
  }
  else
  {
  Response.Write("<script>alert('请选择图片！')</script>");
  }
 }
 /// <summary> 
 /// Http上传文件 
 /// </summary> 
 public static string HttpUploadFile(string url, string path)
 {
  // 设置参数 
  HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
  CookieContainer cookieContainer = new CookieContainer();
  request.CookieContainer = cookieContainer;
  request.AllowAutoRedirect = true;
  request.Method = "POST";
  string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线 
  request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
  byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
  byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
  int pos = path.LastIndexOf("\\");
  string fileName = path.Substring(pos + 1);
  //请求头部信息 
  StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));
  byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());
  FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);
  byte[] bArr = new byte[fs.Length];
  fs.Read(bArr, 0, bArr.Length);
  fs.Close();
  Stream postStream = request.GetRequestStream();
  postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
  postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
  postStream.Write(bArr, 0, bArr.Length);
  postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
  postStream.Close();
  //发送请求并获取相应回应数据 
  HttpWebResponse response = request.GetResponse() as HttpWebResponse;
  //直到request.GetResponse()程序才开始向目标网页发送Post请求 
  Stream instream = response.GetResponseStream();
  StreamReader sr = new StreamReader(instream, Encoding.UTF8);
  //返回结果网页（html）代码 
  string content = sr.ReadToEnd();
  return content;
 } 
 /// <summary>
 /// 删除图片
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void LinkBtnDeleteImg_Click(object sender, EventArgs e)
 {
  string filename = Session["fileNameimg"].ToString();
  if (!string.IsNullOrEmpty(filename))//确保picPath有值并且不为空。
  {
  
  string serverpath = Server.MapPath("~/WeiXinImg/") + filename;//取得文件在服务器上保存的位置C:\Inetpub\wwwroot\WebSite1\images\20022775_m.jpg 
  if (File.Exists(serverpath))
  {
   try
   {
   File.Delete(serverpath);
   this.ImgTuWen.ImageUrl = "weixinimg/fengmiandefault.jpg";
   this.ImgTuWen2.Visible = false;
   this.ImgTuWen2.ImageUrl = "";
   Session["fileNameimg"] = null;
   this.LinkBtnDeleteImg.Visible = false;
   }
   catch(Exception ex)
   {
   //错误处理：
   Response.Write(ex.Message.ToString());
   }
  }
  }
 }

新建单图文预览代码如下：

 /// <summary>
 /// 预览图文消息
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void LinkBtnSendPreview_Click(object sender, EventArgs e)
 {
  Session["media_id"] = null;
  //非空验证
  if (String.IsNullOrWhiteSpace(this.txttuwen_title.Value.ToString()))
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('请输入图文标题！');", true);
  this.txttuwen_title.Focus();
  return;
  }
  if (this.ImgTuWen2.ImageUrl.ToString().Equals(""))
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('必须上传一张图片！');", true);
  this.ImgTuWen2.Focus();
  return;
  }
  if (String.IsNullOrWhiteSpace(this.tbContent.InnerText.ToString()))
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('请输入正文内容！');", true);
  this.tbContent.Focus();
  return;
  }
  //对各项进行赋值
  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);
  //POST数据例子： POST数据例子：
  //{
  // "articles": [{
  // "title": TITLE,
  // "thumb_media_id": THUMB_MEDIA_ID,
  // "author": AUTHOR,
  // "digest": DIGEST,
  // "show_cover_pic": SHOW_COVER_PIC(0 / 1),
  // "content": CONTENT,
  // "content_source_url": CONTENT_SOURCE_URL
  // },
  // //若新增的是多图文素材，则此处应还有几段articles结构
  // ]
  //}
  string isshow_cover_pic = "";
  if (this.CheckFengMianShow.Checked)
  {
  isshow_cover_pic = "1";
  }
  else
  {
  isshow_cover_pic = "0";
  }
  string description = NoHTML(this.tbContent.InnerText.ToString());
  
  string postData = "{\"articles\":[{\"title\":\"" + this.txttuwen_title.Value.ToString() +
  "\",\"thumb_media_id\":\"" + Session["imgmedia_id"].ToString() +
  "\",\"author\":\"" + this.txttuwen_author.Value.ToString() +
  "\",\"digest\":\"" + this.txtzhaiyao.InnerText.ToString() +
   "\",\"show_cover_pic\":\"" + isshow_cover_pic +
   "\",\"content\":\"" + description +
   "\",\"content_source_url\":\"" + this.txtYuanWenUrl.Text.ToString() +
   "\"}]}";
  string posturl = string.Format("https://api.weixin.qq.com/cgi-bin/media/uploadnews?access_token={0}", Access_tokento);
  string jsonres = PostUrl(posturl, postData);
  if (jsonres.Contains("media_id"))
  {
  //使用前需要引用Newtonsoft.json.dll文件
  JObject jsonObj = JObject.Parse(jsonres);
  if (this.txttoUserName.Value.ToString().Trim().Equals("请输入用户微信号"))
  {
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('请输入接收消息的用户微信号！');", true);
   return;
  }
  string posturls = "https://api.weixin.qq.com/cgi-bin/message/mass/preview?access_token=" + Access_tokento;
  //预览图文消息的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 postDatas = "{\"towxname\":\"" + this.txttoUserName.Value.ToString() +
     "\",\"mpnews\":{\"media_id\":\"" + jsonObj["media_id"].ToString() +
     "\"},\"msgtype\":\"mpnews\"}";
  string tuwenres = wxs.GetPage(posturls, postDatas);
  //使用前需药引用Newtonsoft.json.dll文件
  JObject jsonObjss = JObject.Parse(tuwenres);
  if (jsonObjss["errcode"].ToString().Equals("0"))
  {
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('发送预览成功！！');", true);
   return;
  }
  else
  {
   ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('发送预览失败！！');", true);
   return;
  }
  }
 }
 public static string NoHTML(string Htmlstring)
 {
  //删除脚本 
  Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
  //替换标签
  Htmlstring = Htmlstring.Replace("\r\n", " ");
  Htmlstring = Htmlstring.Replace("\"", "'");
  Htmlstring = Htmlstring.Replace(" ", " ");
  return Htmlstring;
 }

单击确定按钮代码如下：

 /// <summary>
 /// 确认选择
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void LinkBtnSubSave_Click(object sender, EventArgs e)
 {
  Session["media_id"] = null;
  //非空验证
  if (String.IsNullOrWhiteSpace(this.txttuwen_title.Value.ToString()))
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('请输入图文标题！');", true);
  return;
  }
  if (this.ImgTuWen2.ImageUrl.ToString().Equals(""))
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('必须上传一张图片！');", true);
  return;
  }
  if (String.IsNullOrWhiteSpace(this.tbContent.InnerText.ToString()))
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('请输入正文内容！');", true);
  return;
  }
  //对各项进行赋值
  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);
  //POST数据例子： POST数据例子：
  //{
  // "articles": [{
  // "title": TITLE,
  // "thumb_media_id": THUMB_MEDIA_ID,
  // "author": AUTHOR,
  // "digest": DIGEST,
  // "show_cover_pic": SHOW_COVER_PIC(0 / 1),
  // "content": CONTENT,
  // "content_source_url": CONTENT_SOURCE_URL
  // },
  // //若新增的是多图文素材，则此处应还有几段articles结构
  // ]
  //}
  string isshow_cover_pic = "";
  if (this.CheckFengMianShow.Checked)
  {
  isshow_cover_pic = "1";
  }
  else
  {
  isshow_cover_pic = "0";
  }
  string description = NoHTML(this.tbContent.InnerText.ToString());
  string postData = "{\"articles\":[{\"title\":\"" + this.txttuwen_title.Value.ToString() +
  "\",\"thumb_media_id\":\"" + Session["imgmedia_id"].ToString() +
  "\",\"author\":\"" + this.txttuwen_author.Value.ToString() +
  "\",\"digest\":\"" + this.txtzhaiyao.InnerText.ToString() +
   "\",\"show_cover_pic\":\"" + isshow_cover_pic +
   "\",\"content\":\"" + description +
   "\",\"content_source_url\":\"" + this.txtYuanWenUrl.Text.ToString() +
   "\"}]}";
  string posturl = string.Format("https://api.weixin.qq.com/cgi-bin/media/uploadnews?access_token={0}", Access_tokento);
  string jsonres = PostUrl(posturl, postData);
  if (jsonres.Contains("media_id"))
  {
  //使用前需要引用Newtonsoft.json.dll文件
  JObject jsonObj = JObject.Parse(jsonres);
  WxMpNewsInfo wmninfo = new WxMpNewsInfo();
  wmninfo.title = this.txttuwen_title.Value.ToString();
  wmninfo.contents = description.ToString();
  wmninfo.ImageUrl = this.ImgTuWen.ImageUrl.ToString();
  Session["wmninfo"] = wmninfo;
  Response.Redirect("WxMassManage.aspx?media_id=" + jsonObj["media_id"].ToString());
  }
 }
 /// <summary> 
 /// 请求Url，发送数据 
 /// </summary> 
 public static string PostUrl(string url, string postData)
 {
  byte[] data = Encoding.UTF8.GetBytes(postData);
  // 设置参数 
  HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
  CookieContainer cookieContainer = new CookieContainer();
  request.CookieContainer = cookieContainer;
  request.AllowAutoRedirect = true;
  request.Method = "POST";
  request.ContentType = "application/x-www-form-urlencoded";
  request.ContentLength = data.Length;
  Stream outstream = request.GetRequestStream();
  outstream.Write(data, 0, data.Length);
  outstream.Close();
  //发送请求并获取相应回应数据 
  HttpWebResponse response = request.GetResponse() as HttpWebResponse;
  //直到request.GetResponse()程序才开始向目标网页发送Post请求 
  Stream instream = response.GetResponseStream();
  StreamReader sr = new StreamReader(instream, Encoding.UTF8);
  //返回结果网页（html）代码 
  string content = sr.ReadToEnd();
  return content;
 }

Response.Redirect("WxMassManage.aspx?media_id=" + jsonObj["media_id"].ToString());
这句代码就是将上传图文后得到的media_Id参数传送到群发界面，群发界面接收代码如下：

 protected void Page_Load(object sender, EventArgs e)
 {
  if(!Page.IsPostBack)
  {
  BindNewsSucaiList();//绑定素材列表
  BindGroupList();//绑定分组列表
  BindMassCount();//绑定本月已群发条数
  this.DataBind();
  if (Request.QueryString["media_id"] != null)
  {
   this.RadioBtnList.SelectedValue = "1";
   this.showExpress.Visible = false;
   this.txtwenben.Visible = false;
   this.tuwen.Visible = true;
   this.tuwenxuan.Visible = false;
   this.tuwenjian.Visible = false;
   this.lbtuwenmedai_id.Visible = true;
   this.lbtuwenmedai_id.Text = Request.QueryString["media_id"].ToString();
   this.LinkBtndeletetuwen.Visible = true;
   this.Imageyixuan.Visible = true;
  }
  }
 }

最终界面如下：

我这里只接收了一个media_id值，相对于做的简单，直接将值赋值给了一个label用于显示，也可以做成像官网那样，确定选择后，按照图文样式显示.

最后一步：群发按钮代码：其实上一章已经将代码贴出去了，这一章，我就单独贴一遍吧。
 

 /// <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，//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('请选择或新建图文素材再进行群发！');", true);
     return;
    }
    WxMassService wms = new WxMassService();
    List<WxMassInfo> wxmaslist = wms.GetMonthMassCount();
    if (wxmaslist.Count >= 4)
    {
     ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('本月可群发消息数量已达上限！');", 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('群发任务已提交成功！！！数据已保存！');location='WxMassManage.aspx';", true);
         return;
        }
        else
        {
         ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群发任务已提交成功！！！数据保存失败！');", 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('群发任务已提交成功！！！图文部分数据已保存！');location='WxMassManage.aspx';", true);
         return;
        }
        else
        {
         ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群发任务已提交成功！！！数据保存失败！');", true);
         return;
        }
       }
      }
      else
      {
       ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群发任务提交失败！！');", 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('群发任务已提交成功！！！数据已保存！');location='WxMassManage.aspx';", true);
         return;
        }
        else
        {
         ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群发任务已提交成功！！！数据保存失败！');", 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('群发任务已提交成功！！！图文部分数据已保存！');location='WxMassManage.aspx';", true);
         return;
        }
        else
        {
         ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群发任务已提交成功！！！数据保存失败！');", true);
         return;
        }
       }
      }
      else
      {
       ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群发任务提交失败！！');", true);
       return;
      }
     }
    }
   }
  }

为什么叫群发任务提交成功或失败，因为将信息提交给微信服务器，微信服务器还需审核，审核过程中也有可能审核不通过，不给于群发，所以我起名叫这个，嘿嘿，随便你们怎么起。。。。。

至此群发图文信息功能，已完毕，最后是群发记录，还记得上一章提到的群发成功之后要在本地保存记录吗，保存记录的原因，用于计算当月已群发几条信息，另外还有一个功能就是，群发成功之后，会得到一个消息msgid,根据这个ID可以对已经发送成功的信息进行撤销（删除）操作，关于撤销操作：微信官方规定，对群发成功的图文和视频消息，半个小时之内可以进行删除操作，其他消息一经群发成功概不支持此操作。截图如下：

该类用于存储已群发记录的实体类

 /// <summary>
 /// 微信已群发消息实体类，用于记录已群发消息的条数，信息实体
 /// </summary>
 public class WxMassInfo
 {
  public int WxMassNo { get; set; }//群发消息编号，数据库自增列
  public string title { get; set; }//图文消息的标题，若消息是文本类型，此项不显示
  public string ImageUrl { get; set; }//图片地址，若消息是文本类型，此项不显示
  public string type { get; set; }//消息的类型，文本，图文，图片，语音，视频
  public string contents { get; set; }//文本消息的内容，图文消息的正文
  public string massObject { get; set; }//群发对象
  public string massStatus { get; set; }//群发状态
  public string massMessageID{ get; set; }//群发成功后返回的消息ID
  public string massDate { get; set; }//群发日期时间
 }

本文已被整理到了《ASP.NET微信开发教程汇总》，欢迎大家学习阅读。

以上就是本文的全部内容，希望对大家的学习有所帮助。