asp.net微信开发（永久素材管理）


            除了3天就会失效的临时素材外，开发者有时需要永久保存一些素材，届时就可以通过本接口新增永久素材。

最近更新，永久图片素材新增后，将带有URL返回给开发者，开发者可以在腾讯系域名内使用（腾讯系域名外使用，图片将被屏蔽）。

请注意：



  1、新增的永久素材也可以在公众平台官网素材管理模块中看到

  2、永久素材的数量是有上限的，请谨慎新增。图文消息素材和图片素材的上限为5000，其他类型为1000

  3、素材的格式大小等要求与公众平台官网一致。具体是，图片大小不超过2M，支持bmp/png/jpeg/jpg/gif格式，语音大小不超过5M，长度不超过60秒，支持mp3/wma/wav/amr格式

  4、调用该接口需https协议

  



先来看我自己自定义的后台永久素材管理效果图，如下：



再看看微信官网后台上的显示界面，同步的哦！



首先我们来分析一下步骤：

第一步：如果想让图片在自己的页面显示，首先得先建个实体类吧，用来存储素材的信息吧







/// <summary>

 /// 微信永久素材实体类，用于保存永久素材上传至微信服务器后返回的数据

 /// </summary>

 public class WxSuCaiInfo

 {

 public int SuCaiId { get; set; }//自增列序号



 public string SuCaiUrl { get; set; }// 存储文件名



 public string SuCaiType { get; set; }//素材类型，可分为image,voice,video,thumb(缩略图)



 public string SuCaiTitle { get; set; }//图文消息的标题



 public string SuCaiDigest { get; set; }//图文消息的摘要





 public string SuCaiauthor { get; set; }//图文消息的作者

 public string SuCaishow_cover_pic { get; set; }//图文消息是否显示封面.保存0或1



 public string SuCaicontent { get; set; }//图文消息的正文内容

 public string SuCaicontent_source_url { get; set; }//图文消息的原文链接





 public string media_ID { get; set; }//上传至微信服务器后，返回的永久mediaID





 public string Url { get; set; }//上传至微信服务器后，返回的图片URL，仅图片才会返回此属性



 public string uploadDate { get; set; }//上传日期时间





 }





第二步：上传图片至微信服务器，成功后将返回的media_id和url两个字段数据和其他字段数据一并保存到本地服务器，上传的代码如下：







 /// <summary>

 /// 上传图片至微信服务器,并且本地也保存一份

 /// </summary>

 /// <param name="sender"></param>

 /// <param name="e"></param>

 protected void LinBtnUploadImg_Click(object sender, EventArgs e)

 {

  if (this.FileUploadImage.HasFile)

  {

  string fileContentType = FileUploadImage.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.FileUploadImage.PostedFile.ContentLength;



   if (fileSize <= 2097152)

   {

   string fileName = this.FileUploadImage.PostedFile.FileName;

   // 客户端文件路径

   string filepath = FileUploadImage.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



   //把图片上传至本地服务器

   this.FileUploadImage.PostedFile.SaveAs(serverpath);//将上传的文件另存为





   //上传图片素材至微信服务器,永久保存



   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 url = string.Format("http://api.weixin.qq.com/cgi-bin/material/add_material?access_token={0}&type={1}", Access_tokento,"image");



   try

   {



    string res = HttpUploadFile(url, serverpath);

    //判断res结果集里面是否包含media_id

    if (res.Contains("media_id"))

    {

    //如果能进行到这里，那说明图片已经上传至微信服务器，是永久素材哦，

    //开始解析json串，使用前需要引用Newtonsoft.json.dll文件

    JObject jsonObj = JObject.Parse(res);



    



    //图片上传成功后，返回的是两个字段，media_id和url





    //将两个字段开始存入数据库，保存数据，方便获取列表的时候直接从本地服务器读取

    WxSuCaiInfo wsc = new WxSuCaiInfo();



    wsc.SuCaiUrl = filename;//注意，这里保存的图片名称



    wsc.SuCaiType = "image";//文件类型



    wsc.media_ID = jsonObj["media_id"].ToString();//这个属性保存的是微信返回的media_id



    wsc.Url = jsonObj["url"].ToString();//这个属性保存的才是微信返回的url



    wsc.uploadDate = System.DateTime.Now.ToString();//记录当前文件上传日期时间



    //存入数据库

    WxSuCaiService wscs = new WxSuCaiService();





    int num = wscs.AddWxSuCaiInfo(wsc);



    if (num > 0)

    {

     Response.Write("<script>alert('上传图片素材成功！');location='WxSuCaiMannageImageList.aspx';</script>");

    }

    else

    {

     Response.Write("<script>alert('上传图片素材失败！');location='WxSuCaiMannageImageList.aspx';</script>");

    }

    }

   }

   catch(Exception ex)

   {

    Response.Write(ex.Message.ToString());

   }

   }

   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,JPEG格式的图片！')</script>");

  }

  }

  else

  {

  Response.Write("<script>alert('请选择图片！')</script>");

  }

 }







走到这其实效果已经出来了，接下来看最后一步就是删除选中的素材，删除微信远程服务器的数据--再删除本地服务器的数据，有人问难道这个还有顺序？

其实你可以想象，如果微信服务器的图片没有删除成功，你先把本地服务器的图片删除了，那就和官网同步不了了。

第三步：删除素材







 /// <summary>

 /// 全选全不选

 /// </summary>

 /// <param name="sender"></param>

 /// <param name="e"></param>

 protected void CheckAll_CheckedChanged(object sender, EventArgs e)

 {

  foreach (DataListItem item in this.DLSuCaiImageList.Items)

  {

  CheckBox checkIn = item.FindControl("CheckIn") as CheckBox;

  checkIn.Checked = CheckAll.Checked;

  }

 }

 /// <summary>

 /// 删除选中项

 /// </summary>

 /// <param name="sender"></param>

 /// <param name="e"></param>

 protected void LinkBtnDeleteSelected_Click(object sender, EventArgs e)

 {

  Boolean ischeck = false;



  foreach (DataListItem item in this.DLSuCaiImageList.Items)

  {

  CheckBox checkIn = item.FindControl("CheckIn") as CheckBox;

  if (checkIn.Checked)

  {

   ischeck = true;

   Label lbSuCaiId = item.FindControl("lbSuCaiId") as Label;

   Label lbSuCaiUrl = item.FindControl("lbSuCaiUrl") as Label;

   Label lbmedia_ID = item.FindControl("lbmedia_ID") as Label;

   

   //删除微信服务器上的图片

   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 = "http://api.weixin.qq.com/cgi-bin/material/del_material?access_token=" + Access_tokento;





   //POST数据例子： POST数据例子：{"media_id":MEDIA_ID}



   string media_id = lbmedia_ID.Text.ToString();



   string postData = "{\"media_id\":\"" + media_id + "\"}";



   res = wxs.GetPage(posturl, postData);



   if (res.Contains("errcode"))

   {

   //开始解析json串，使用前需要引用Newtonsoft.json.dll文件

   JObject jsonObj = JObject.Parse(res);



   if (jsonObj["errcode"].ToString().Equals("0"))

   {



    ///获取本地服务器的路径

    string serverPathss = Server.MapPath("~/WeiXinImg/") + lbSuCaiUrl.Text.ToString();

    //验证本地服务的路径是否存在该图片

    if (File.Exists(serverPathss))

    {

    //如果存在就删除

    File.Delete(serverPathss);

    }



    WxSuCaiService wscs = new WxSuCaiService();

    //通过media_id删除本地服务器数据库记录

    int num = wscs.DeleteWxSuCaiInfo(lbmedia_ID.Text.ToString());

    if (num > 0)

    {

    Response.Write("<script>alert('图片素材删除成功！');location='WxSuCaiMannageImageList.aspx';</script>");

    }

    else

    {

    Response.Write("<script>alert('微信服务器图片删除成功！本地服务器图片素材删除失败！');location='WxSuCaiMannageImageList.aspx';</script>");

    }

   }

   } 

  }

  }

  if (!ischeck)

  {

  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('请先选中删除项！！！')", true);

  return;

  }

 }





最后是页面的代码一并奉上，大家仔细研究。







<!DOCTYPE html>



<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

 <title></title>

 <link href="css/style.css" rel="Stylesheet" type="text/css" />

 <style type="text/css">

 .meun { width:1100px; height:40px; margin-left:20px; line-height:40px; margin-top:10px;border-bottom:1px solid #d6d6d6;

 }

 .meun ul { padding:0px; margin:0px;

 }

  .meun ul li{ float:left; width:100px; text-align:center;list-style:none;

 }

  .meun ul li:hover{ border-bottom:3px solid #ecd9df; cursor:pointer;

 }

 a:hover { color:#000;

 }

 .checkedstyle { border-bottom:3px solid #208008;

 }

 .meun_imglist { width:1050px; min-height:300px; border:1px solid #d6d6d6; margin-top:20px; margin-left:35px; margin-bottom:30px;

 }

 .uploadstyle { width:300px; background-image:url('images/inputbg.gif'); background-repeat:repeat-x; height:35px; border:1px solid #d6d6d6; float:left; margin-bottom:10px; line-height:35px;

 }

 .CheckAll { float:left; padding:5px;

 }

 .CheckIn { float:left; padding:2px;

 }

 .DLSuCaiImageList { margin-top:10px; margin-left:10px;

 }

 </style>

</head>

<body>

 <form id="form1" runat="server">

 <div class="place">

 <span>位置：</span>

 <ul class="placeul">

  <li><a href="WelCome.aspx" target="rightFrame">首页</a></li>

  <li>微信管理</li>

  <li>德桥员工服务中心--素材管理</li>

 </ul>

 </div>

  <div style="height:30px; line-height:30px; margin-top:10px; margin-left:45px;"><span style="float:left; font-size:16px;">素材管理</span><span style="color:red; float:left; margin-left:20px;">永久素材和微信官网同步，您在这里所操作的任何一项，将影响到官网后台素材管理，谨慎操作！</span></div>

 <div class="meun">

  <ul>

  <li><a href="WxSuCaiManageList.aspx">图文消息</a></li>

  <li class="checkedstyle"><a href="WxSuCaiMannageImageList.aspx">图片库</a></li>

  <li><a href="#">语音</a></li>

  <li><a href="#">视频</a></li>

  </ul>

 </div>

 <div class="meun_imglist">

  <div style="margin:5px auto 10px 10px; height:36px; line-height:36px;">

  <asp:FileUpload ID="FileUploadImage" CssClass="uploadstyle" runat="server" /> 

  <asp:LinkButton ID="LinBtnUploadImg" runat="server" OnClick="LinBtnUploadImg_Click"><span style="background-image:url('images/buttonbg.png'); width:111px; height:35px; line-height:35px; margin-bottom:10px; font-weight:bold; text-align:center; float:left; margin-left:10px; color:#fff;">上传</span></asp:LinkButton>

  <span style="margin-left:30px; color:red;" >  支持jpg,gif,png,bmp格式图片，大小2M内，如上传成功后，图片未能显示，请将图片重新命名后再尝试上传.</span>

  </div>

  <div style=" clear:both;line-height:35px; margin:10px auto auto auto; height:35px; width:1030px; background-color:#f6f6f6; border-radius:5px; border-bottom:1px solid #d6d6d6;">

  <asp:CheckBox ID="CheckAll" CssClass="CheckAll" AutoPostBack="true" runat="server" OnCheckedChanged="CheckAll_CheckedChanged" />  <span style="float:left; padding:3px;">全选</span>

  <asp:LinkButton ID="LinkBtnDeleteSelected" runat="server" OnClick="LinkBtnDeleteSelected_Click"><span style="width:111px; height:25px; line-height:25px; font-weight:bold; text-align:center; float:left; margin-left:15px; color:#000; background-color:#fff; margin-top:5px; border:1px solid #ecd9df; border-radius:3px;">删除选中</span></asp:LinkButton>

  </div>

  

  <asp:DataList ID="DLSuCaiImageList" CssClass="DLSuCaiImageList" runat="server" RepeatColumns="6">

  <ItemTemplate>

   <div style="width:150px; height:180px; margin-right:22px;margin-bottom:15px; border:1px solid #d9d9d9;">

   <img src='../WeiXinImg/<%# Eval("SuCaiUrl") %>' style="height:120px; width:150px; border:0px;" />

   <div style="width:150px;height:25px; line-height:25px; text-indent:3px; border-top:1px solid #d9d9d9;">

    <asp:CheckBox ID="CheckIn" CssClass="CheckIn" runat="server" />

    <asp:Label ID="lbSuCaiUrl" ToolTip='<%# Eval("SuCaiUrl")%>' runat="server" Text='<%# Eval("SuCaiUrl").ToString().Length>8?Eval("SuCaiUrl").ToString().Substring(0,8)+"...":Eval("SuCaiUrl").ToString() %>'></asp:Label>

   </div>

   <div style=" clear:both; width:150px;height:25px; line-height:25px; text-indent:5px; border-top:1px solid #d9d9d9;">

    <%# Eval("uploadDate").ToString().Length>20?Eval("uploadDate").ToString().Substring(0,20)+"...":Eval("uploadDate").ToString() %>

    <asp:Label ID="lbSuCaiId" runat="server" Visible="false" Text='<%# Eval("SuCaiId") %>'></asp:Label>

    <asp:Label ID="lbmedia_ID" runat="server" Visible="false" Text='<%# Eval("media_ID") %>'></asp:Label>

   </div>

   </div>

  </ItemTemplate>

  </asp:DataList>



 </div>

 </form>

</body>

</html>







其他素材上传都类似，就不一一介绍了。

新建图文素材界面如下：



从图片库选择图片素材如下：



这是就是从已上传过的图片库中选择的，和图片素材管理界面的功能基本相似，只不过多了一个确认选择的按钮，因为确认选择了之后，要关闭本页，回到新建图文页面，主要代码：







 /// <summary>

 /// 确认选择，选中之后，跳转至新建图文页面

 /// </summary>

 /// <param name="sender"></param>

 /// <param name="e"></param>

 protected void LinkBtnSubMitSelected_Click(object sender, EventArgs e)

 {



  Boolean bools = false;

  int num = 0;

  foreach (DataListItem item in this.DLSuCaiImageList.Items)

  {

  CheckBox checkIn = item.FindControl("CheckIn") as CheckBox;



  if (checkIn.Checked)

  {

   num += 1;

   bools = true;

  }

  }

  if (!bools)

  {

  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('请选择一个图片素材！！！')", true);

  return;

  }

  if (num >= 2)

  {

  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('您只能选择一个图片素材！');", true);

  return;

  }

  else

  {

  foreach (DataListItem item in this.DLSuCaiImageList.Items)

  {

   CheckBox checkIn = item.FindControl("CheckIn") as CheckBox;



   if (checkIn.Checked)

   {

   ///获取选中图片media_id

   Label lbmedia_ID = item.FindControl("lbmedia_ID") as Label;

   Session["imgmedia_id"] = lbmedia_ID.Text.ToString();

   Response.Write("<script>alert('已选择！');window.opener.location.reload();window.close();</script>");

   }

  }

  }

 }







新建图文的页面在接收的时候可以这样：







 if (Session["imgmedia_id"] != null)

   {

   WxSuCaiService wscs = new WxSuCaiService();



   WxSuCaiInfo wscinfo = wscs.GetWxSuCaiInfo(Session["imgmedia_id"].ToString());



   if(wscinfo!=null)

   {

    this.ImgTuWen.ImageUrl = "~/WeiXinImg/" + wscinfo.SuCaiUrl.ToString();

    this.ImgTuWen2.ImageUrl = "~/WeiXinImg/" + wscinfo.SuCaiUrl.ToString();

    this.ImgTuWen2.Visible = true;

    Session["imgmedia_id"] = wscinfo.media_ID.ToString();//图片的media_id

    Session["fileNameimg"] = wscinfo.SuCaiUrl.ToString();//图片的文件名称

   }





   }







最后新建图文信息的效果图如下：



官方后台如下：



关于编辑图文信息的关键代码如下：







 /// <summary>

 /// 绑定事件

 /// </summary>

 /// <param name="sender"></param>

 /// <param name="e"></param>

 protected void DLMpNewsList_ItemDataBound(object sender, DataListItemEventArgs e)

 {

  if(e.Item.ItemType==ListItemType.Item||e.Item.ItemType==ListItemType.AlternatingItem)

  {

  LinkButton LinkBtnDeleteSucai = e.Item.FindControl("LinkBtnDeleteSucai") as LinkButton;





  LinkBtnDeleteSucai.Attributes.Add("OnClick","return confirm('您确定删除该图文素材？？？删除后将和微信官网同步删除！！')");





  HyperLink HyperLinkEdit = e.Item.FindControl("HyperLinkEdit") as HyperLink;



  HyperLinkEdit.Attributes.Add("OnClick", "return confirm('即将进入编辑模式！！是否执行下一步操作？？')");





  Label lbmedia_ID = e.Item.FindControl("lbmedia_ID") as Label;





  HyperLinkEdit.NavigateUrl = "WxNewTuWen.aspx?media_id=" + lbmedia_ID.Text.ToString();//把图文消息的media_id传参到新建图文界面



  }

 }









新建图文页面关键代码如下：







 if(!Page.IsPostBack)

  {

  ///编辑模式

  if (Request.QueryString["media_id"] != null)

  {

   string media_id = Request.QueryString["media_id"].ToString();



   Session["sucaimedia_id"] = media_id;



   WxSuCaiService wscs = new WxSuCaiService();





   WxSuCaiInfo wscinfo = wscs.GetWxSuCaiInfo(media_id);



   if (wscinfo != null)

   {

   this.txttuwen_title.Value = wscinfo.SuCaiTitle.ToString();



   if (wscinfo.SuCaiTitle.ToString().Length > 15)

   {

    this.biaoti_yulan.InnerText = wscinfo.SuCaiTitle.ToString().Substring(0, 15) + "...";

   }

   else

   {

    this.biaoti_yulan.InnerText = wscinfo.SuCaiTitle.ToString();

   }



   this.txttuwen_author.Value = wscinfo.SuCaiauthor.ToString();

   this.txtzhaiyao.InnerText = wscinfo.SuCaiDigest.ToString();

   this.ImgTuWen.ImageUrl = "~/WeiXinImg/" + wscinfo.SuCaiUrl.ToString();

   this.ImgTuWen2.ImageUrl = "~/WeiXinImg/" + wscinfo.SuCaiUrl.ToString();

   this.ImgTuWen2.Visible = true;

   Session["imgmedia_id"] = wscinfo.SuCaithumb_media_id.ToString();

   this.LinkBtnDeleteImg.Visible = true;



   if (!String.IsNullOrWhiteSpace(wscinfo.SuCaicontent_source_url.ToString()))

   {

    this.txtYuanWenUrl.Text = wscinfo.SuCaicontent_source_url.ToString();

    this.txtYuanWenUrl.Visible = true;

    this.CheckYuanWen.Checked = true;

   }



   this.txtYuanWenUrl.Text = wscinfo.SuCaicontent_source_url.ToString();



   this.tbContent.InnerText = wscinfo.SuCaicontent.ToString();





   if (wscinfo.SuCaishow_cover_pic.ToString().Equals("1"))

   {

    this.CheckFengMianShow.Checked = true;

   }

   else

   {

    this.CheckFengMianShow.Checked = false;

   }

   }

  }

  }









编辑提交关键代码如下：







/// <summary>

 /// 保存图文素材和修改按钮公用

 /// </summary>

 /// <param name="sender"></param>

 /// <param name="e"></param>

 protected void LinkBtnSaveYongjiu_Click(object sender, EventArgs e)

 {

  //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);





  

 //根据session判断media_id是否为空，也可根据request.queryString["media_id"]进行判断是否为空

  if (Session["sucaimedia_id"] != null)

  {

  //执行更新操作



  //{

  // "media_id":MEDIA_ID,

  // "index":INDEX,

  // "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

  // }

  //}



  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 = "{\"media_id\":\"" + Session["sucaimedia_id"].ToString() +

   "\",\"index\":\"0\" ,\"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() +

  "\"}}";





  ///修改永久图文素材

  string url = string.Format("http://api.weixin.qq.com/cgi-bin/material/update_news?access_token={0}", Access_tokento);



  string jsonres = PostUrl(url, postData);



  if (jsonres.Contains("errcode"))

  {

   //使用前需要引用Newtonsoft.json.dll文件

   JObject jsonObj = JObject.Parse(jsonres);



   if (jsonObj["errcode"].ToString().Equals("0"))

   {

   //修改本地数据

   //保存数据，方便获取列表的时候直接从本地服务器读取

   WxSuCaiInfo wsc = new WxSuCaiInfo();



   wsc.SuCaiUrl = Session["fileNameimg"].ToString();//注意，这里保存的图片名称



   wsc.SuCaiTitle = this.txttuwen_title.Value.ToString();//图文消息的标题



   wsc.SuCaiDigest = this.txtzhaiyao.InnerText.ToString();//图文消息的摘要



   wsc.SuCaithumb_media_id = Session["imgmedia_id"].ToString();//图文的消息封面media_id



   wsc.SuCaiauthor = this.txttuwen_author.Value.ToString();



   wsc.SuCaishow_cover_pic = isshow_cover_pic;



   wsc.SuCaicontent = description;



   wsc.SuCaicontent_source_url = this.txtYuanWenUrl.Text.ToString();



   wsc.uploadDate = System.DateTime.Now.ToString();//记录当前文件保存图文素材日期时间



   //修改数据库信息

   WxSuCaiService wscs = new WxSuCaiService();



   int num = wscs.UpdateWxSuCaiInfo(Session["sucaimedia_id"].ToString(), wsc);



   if (num > 0)

   {

    Session["sucaimedia_id"] = null;

    Response.Write("<script>alert('图文素材修改成功！');location='WxSuCaiManageList.aspx';</script>");

   }

   else

   {

    Response.Write("<script>alert('图文素材修改失败！');</script>");

   }



   }



  }



  }

  else

  {

  //新增图文素材

  }

 }







需注意：新建图文页面和修改图文页面是公用的一个页面.......

编辑提交按钮和保存按钮是公用的一个按钮.....

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