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這篇文章講述Introduction to permanent material management in asp.net WeChat development的相關(guān)內(nèi)容，需要的朋友可以參考下

除了3天就會失效的臨時(shí)素材外，開發(fā)者有時(shí)需要永久保存一些素材，屆時(shí)就可以通過本接口新增永久素材。

最近更新，永久圖片素材新增后，將帶有URL返回給開發(fā)者，開發(fā)者可以在騰訊系域名內(nèi)使用（騰訊系域名外使用，圖片將被屏蔽）。

請注意：

1、新增的永久素材也可以在公眾平臺官網(wǎng)素材管理模塊中看到
2、永久素材的數(shù)量是有上限的，請謹(jǐn)慎新增。圖文消息素材和圖片素材的上限為5000，其他類型為1000
3、素材的格式大小等要求與公眾平臺官網(wǎng)一致。具體是，圖片大小不超過2M，支持bmp/png/jpeg/jpg/gif格式，語音大小不超過5M，長度不超過60秒，支持mp3/wma/wav/amr格式
4、調(diào)用該接口需https協(xié)議

先來看我自己自定義的后臺永久素材管理效果圖，如下：

Introduction to permanent material management in asp.net WeChat development

再看看微信官網(wǎng)后臺上的顯示界面，同步的哦！

Introduction to permanent material management in asp.net WeChat development

首先我們來分析一下步驟：
第一步：如果想讓圖片在自己的頁面顯示，首先得先建個(gè)實(shí)體類吧，用來存儲素材的信息吧

/// <summary>
 /// 微信永久素材實(shí)體類，用于保存永久素材上傳至微信服務(wù)器后返回的數(shù)據(jù)
 /// </summary>
 public class WxSuCaiInfo
 {
 public int SuCaiId { get; set; }//自增列序號

 public string SuCaiUrl { get; set; }// 存儲文件名

 public string SuCaiType { get; set; }//素材類型，可分為image,voice,video,thumb(縮略圖)

 public string SuCaiTitle { get; set; }//圖文消息的標(biāo)題

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


 public string SuCaiauthor { get; set; }//圖文消息的作者
 public string SuCaishow_cover_pic { get; set; }//圖文消息是否顯示封面.保存0或1

 public string SuCaicontent { get; set; }//圖文消息的正文內(nèi)容
 public string SuCaicontent_source_url { get; set; }//圖文消息的原文鏈接


 public string media_ID { get; set; }//上傳至微信服務(wù)器后，返回的永久mediaID


 public string Url { get; set; }//上傳至微信服務(wù)器后，返回的圖片URL，僅圖片才會返回此屬性

 public string uploadDate { get; set; }//上傳日期時(shí)間


 }

第二步：上傳圖片至微信服務(wù)器，成功后將返回的media_id和url兩個(gè)字段數(shù)據(jù)和其他字段數(shù)據(jù)一并保存到本地服務(wù)器，上傳的代碼如下：

 /// <summary>
 /// 上傳圖片至微信服務(wù)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;
   // 客戶端文件路徑
   string filepath = FileUploadImage.PostedFile.FileName; //得到的是文件的完整路徑,包括文件名，如：C:\Documents and Settings\Administrator\My Documents\My Pictures\20022775_m.jpg 
   //string filepath = FileUpload1.FileName;  //得到上傳的文件名20022775_m.jpg 
   string filename = filepath.Substring(filepath.LastIndexOf("\\") + 1);//20022775_m.jpg 
   string serverpath = Server.MapPath("~/WeiXinImg/") + filename;//取得文件在服務(wù)器上保存的位置C:\Inetpub\wwwroot\WebSite1\images\20022775_m.jpg

   //把圖片上傳至本地服務(wù)器
   this.FileUploadImage.PostedFile.SaveAs(serverpath);//將上傳的文件另存為


   //上傳圖片素材至微信服務(wù)器,永久保存

   WeiXinServer wxs = new WeiXinServer();

   ///從緩存讀取accesstoken
   string Access_token = Cache["Access_token"] as string;

   if (Access_token == null)
   {
    //如果為空，重新獲取
    Access_token = wxs.GetAccessToken();

    //設(shè)置緩存的數(shù)據(jù)7000秒后過期
    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);
    //判斷res結(jié)果集里面是否包含media_id
    if (res.Contains("media_id"))
    {
    //如果能進(jìn)行到這里，那說明圖片已經(jīng)上傳至微信服務(wù)器，是永久素材哦，
    //開始解析json串，使用前需要引用Newtonsoft.json.dll文件
    JObject jsonObj = JObject.Parse(res);

    

    //圖片上傳成功后，返回的是兩個(gè)字段，media_id和url


    //將兩個(gè)字段開始存入數(shù)據(jù)庫，保存數(shù)據(jù)，方便獲取列表的時(shí)候直接從本地服務(wù)器讀取
    WxSuCaiInfo wsc = new WxSuCaiInfo();

    wsc.SuCaiUrl = filename;//注意，這里保存的圖片名稱

    wsc.SuCaiType = "image";//文件類型

    wsc.media_ID = jsonObj["media_id"].ToString();//這個(gè)屬性保存的是微信返回的media_id

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

    wsc.uploadDate = System.DateTime.Now.ToString();//記錄當(dāng)前文件上傳日期時(shí)間

    //存入數(shù)據(jù)庫
    WxSuCaiService wscs = new WxSuCaiService();


    int num = wscs.AddWxSuCaiInfo(wsc);

    if (num > 0)
    {
     Response.Write("<script>alert(&#39;上傳圖片素材成功！&#39;);location=&#39;WxSuCaiMannageImageList.aspx&#39;;</script>");
    }
    else
    {
     Response.Write("<script>alert(&#39;上傳圖片素材失??！&#39;);location=&#39;WxSuCaiMannageImageList.aspx&#39;;</script>");
    }
    }
   }
   catch(Exception ex)
   {
    Response.Write(ex.Message.ToString());
   }
   }
   else
   {
   Response.Write("<script>alert(&#39;上傳文件不能大于2M！&#39;)</script>");
   }

  }
  else
  {
   Response.Write("<script>alert(&#39;只支持BMP,GIF,PNG,JPG,JPEG格式的圖片！&#39;)</script>");
  }
  }
  else
  {
  Response.Write("<script>alert(&#39;請選擇圖片！&#39;)</script>");
  }
 }

走到這其實(shí)效果已經(jīng)出來了，接下來看最后一步就是刪除選中的素材，刪除微信遠(yuǎn)程服務(wù)器的數(shù)據(jù)--再刪除本地服務(wù)器的數(shù)據(jù)，有人問難道這個(gè)還有順序？
其實(shí)你可以想象，如果微信服務(wù)器的圖片沒有刪除成功，你先把本地服務(wù)器的圖片刪除了，那就和官網(wǎng)同步不了了。
第三步：刪除素材

 /// <summary>
 /// 全選全不選
 /// </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>
 /// 刪除選中項(xiàng)
 /// </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;
   
   //刪除微信服務(wù)器上的圖片
   WeiXinServer wxs = new WeiXinServer();
   string res = "";

   ///從緩存讀取accesstoken
   string Access_token = Cache["Access_token"] as string;

   if (Access_token == null)
   {
   //如果為空，重新獲取
   Access_token = wxs.GetAccessToken();

   //設(shè)置緩存的數(shù)據(jù)7000秒后過期
   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/del_material?access_token=" + Access_tokento;


   //POST數(shù)據(jù)例子： POST數(shù)據(jù)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"))
   {
   //開始解析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"))
   {

    ///獲取本地服務(wù)器的路徑
    string serverPathss = Server.MapPath("~/WeiXinImg/") + lbSuCaiUrl.Text.ToString();
    //驗(yàn)證本地服務(wù)的路徑是否存在該圖片
    if (File.Exists(serverPathss))
    {
    //如果存在就刪除
    File.Delete(serverPathss);
    }

    WxSuCaiService wscs = new WxSuCaiService();
    //通過media_id刪除本地服務(wù)器數(shù)據(jù)庫記錄
    int num = wscs.DeleteWxSuCaiInfo(lbmedia_ID.Text.ToString());
    if (num > 0)
    {
    Response.Write("<script>alert(&#39;圖片素材刪除成功！&#39;);location=&#39;WxSuCaiMannageImageList.aspx&#39;;</script>");
    }
    else
    {
    Response.Write("<script>alert(&#39;微信服務(wù)器圖片刪除成功！本地服務(wù)器圖片素材刪除失??！&#39;);location=&#39;WxSuCaiMannageImageList.aspx&#39;;</script>");
    }
   }
   } 
  }
  }
  if (!ischeck)
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;請先選中刪除項(xiàng)！??！&#39;)", true);
  return;
  }
 }

最后是頁面的代碼一并奉上，大家仔細(xì)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(&#39;images/inputbg.gif&#39;); 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">
 <p class="place">
 <span>位置：</span>
 <ul class="placeul">
  <li><a href="WelCome.aspx" target="rightFrame">首頁</a></li>
  <li>微信管理</li>
  <li>德橋員工服務(wù)中心--素材管理</li>
 </ul>
 </p>
  <p 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;">永久素材和微信官網(wǎng)同步，您在這里所操作的任何一項(xiàng)，將影響到官網(wǎng)后臺素材管理，謹(jǐn)慎操作！</span></p>
 <p class="meun">
  <ul>
  <li><a href="WxSuCaiManageList.aspx">圖文消息</a></li>
  <li class="checkedstyle"><a href="WxSuCaiMannageImageList.aspx">圖片庫</a></li>
  <li><a href="#">語音</a></li>
  <li><a href="#">視頻</a></li>
  </ul>
 </p>
 <p class="meun_imglist">
  <p 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(&#39;images/buttonbg.png&#39;); width:111px; height:35px; line-height:35px; margin-bottom:10px; font-weight:bold; text-align:center; float:left; margin-left:10px; color:#fff;">上傳</span></asp:LinkButton>
  <span style="margin-left:30px; color:red;" >  支持jpg,gif,png,bmp格式圖片，大小2M內(nèi)，如上傳成功后，圖片未能顯示，請將圖片重新命名后再嘗試上傳.</span>
  </p>
  <p 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;">全選</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;">刪除選中</span></asp:LinkButton>
  </p>
  
  <asp:DataList ID="DLSuCaiImageList" CssClass="DLSuCaiImageList" runat="server" RepeatColumns="6">
  <ItemTemplate>
   <p style="width:150px; height:180px; margin-right:22px;margin-bottom:15px; border:1px solid #d9d9d9;">
   <img  src="/static/imghw/default1.png"  data-src="https://img.php.cn/upload/article/000/000/013/27cf21ae8c49f0cd6901fe542d2b5426-2.png"  class="lazy"  src=&#39;../WeiXinImg/<%# Eval("SuCaiUrl") % alt="Introduction to permanent material management in asp.net WeChat development" >&#39;   style="max-width:90%" />
   <p 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=&#39;<%# Eval("SuCaiUrl")%>&#39; runat="server" Text=&#39;<%# Eval("SuCaiUrl").ToString().Length>8?Eval("SuCaiUrl").ToString().Substring(0,8)+"...":Eval("SuCaiUrl").ToString() %>&#39;></asp:Label>
   </p>
   <p 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=&#39;<%# Eval("SuCaiId") %>&#39;></asp:Label>
    <asp:Label ID="lbmedia_ID" runat="server" Visible="false" Text=&#39;<%# Eval("media_ID") %>&#39;></asp:Label>
   </p>
   </p>
  </ItemTemplate>
  </asp:DataList>

 </p>
 </form>
</body>
</html>

其他素材上傳都類似，就不一一介紹了。
新建圖文素材界面如下：

Introduction to permanent material management in asp.net WeChat development

從圖片庫選擇圖片素材如下：

Introduction to permanent material management in asp.net WeChat development

這是就是從已上傳過的圖片庫中選擇的，和圖片素材管理界面的功能基本相似，只不過多了一個(gè)確認(rèn)選擇的按鈕，因?yàn)榇_認(rèn)選擇了之后，要關(guān)閉本頁，回到新建圖文頁面，主要代碼：

 /// <summary>
 /// 確認(rèn)選擇，選中之后，跳轉(zhuǎn)至新建圖文頁面
 /// </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(&#39;請選擇一個(gè)圖片素材?。?！&#39;)", true);
  return;
  }
  if (num >= 2)
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;您只能選擇一個(gè)圖片素材！&#39;);", true);
  return;
  }
  else
  {
  foreach (DataListItem item in this.DLSuCaiImageList.Items)
  {
   CheckBox checkIn = item.FindControl("CheckIn") as CheckBox;

   if (checkIn.Checked)
   {
   ///獲取選中圖片media_id
   Label lbmedia_ID = item.FindControl("lbmedia_ID") as Label;
   Session["imgmedia_id"] = lbmedia_ID.Text.ToString();
   Response.Write("<script>alert(&#39;已選擇！&#39;);window.opener.location.reload();window.close();</script>");
   }
  }
  }
 }

新建圖文的頁面在接收的時(shí)候可以這樣：

 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();//圖片的media_id
    Session["fileNameimg"] = wscinfo.SuCaiUrl.ToString();//圖片的文件名稱
   }


   }

最后新建圖文信息的效果圖如下：

Introduction to permanent material management in asp.net WeChat development

官方后臺如下：

Introduction to permanent material management in asp.net WeChat development

關(guān)于編輯圖文信息的關(guān)鍵代碼如下：

 /// <summary>
 /// 綁定事件
 /// </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(&#39;您確定刪除該圖文素材？？？刪除后將和微信官網(wǎng)同步刪除??！&#39;)");


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

  HyperLinkEdit.Attributes.Add("OnClick", "return confirm(&#39;即將進(jìn)入編輯模式??！是否執(zhí)行下一步操作？？&#39;)");


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


  HyperLinkEdit.NavigateUrl = "WxNewTuWen.aspx?media_id=" + lbmedia_ID.Text.ToString();//把圖文消息的media_id傳參到新建圖文界面

  }
 }

Introduction to permanent material management in asp.net WeChat development

新建圖文頁面關(guān)鍵代碼如下：

 if(!Page.IsPostBack)
  {
  ///編輯模式
  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;
   }
   }
  }
  }

Introduction to permanent material management in asp.net WeChat development

編輯提交關(guān)鍵代碼如下：

/// <summary>
 /// 保存圖文素材和修改按鈕公用
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected void LinkBtnSaveYongjiu_Click(object sender, EventArgs e)
 {
  //非空驗(yàn)證
  if (String.IsNullOrWhiteSpace(this.txttuwen_title.Value.ToString()))
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;請輸入圖文標(biāo)題！&#39;);", true);
  return;
  }
  if (this.ImgTuWen2.ImageUrl.ToString().Equals(""))
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;必須上傳一張圖片！&#39;);", true);
  return;
  }
  if (String.IsNullOrWhiteSpace(this.tbContent.InnerText.ToString()))
  {
  ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert(&#39;請輸入正文內(nèi)容！&#39;);", true);
  return;
  }

  //對各項(xiàng)進(jìn)行賦值
  WeiXinServer wxs = new WeiXinServer();

  ///從緩存讀取accesstoken
  string Access_token = Cache["Access_token"] as string;

  if (Access_token == null)
  {
  //如果為空，重新獲取
  Access_token = wxs.GetAccessToken();

  //設(shè)置緩存的數(shù)據(jù)7000秒后過期
  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);


  
 //根據(jù)session判斷media_id是否為空，也可根據(jù)request.queryString["media_id"]進(jìn)行判斷是否為空
  if (Session["sucaimedia_id"] != null)
  {
  //執(zhí)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() +
  "\"}}";


  ///修改永久圖文素材
  string url = string.Format("https://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?cái)?shù)據(jù)
   //保存數(shù)據(jù)，方便獲取列表的時(shí)候直接從本地服務(wù)器讀取
   WxSuCaiInfo wsc = new WxSuCaiInfo();

   wsc.SuCaiUrl = Session["fileNameimg"].ToString();//注意，這里保存的圖片名稱

   wsc.SuCaiTitle = this.txttuwen_title.Value.ToString();//圖文消息的標(biāo)題

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

   wsc.SuCaithumb_media_id = Session["imgmedia_id"].ToString();//圖文的消息封面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();//記錄當(dāng)前文件保存圖文素材日期時(shí)間

   //修改數(shù)據(jù)庫信息
   WxSuCaiService wscs = new WxSuCaiService();

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

   if (num > 0)
   {
    Session["sucaimedia_id"] = null;
    Response.Write("<script>alert(&#39;圖文素材修改成功！&#39;);location=&#39;WxSuCaiManageList.aspx&#39;;</script>");
   }
   else
   {
    Response.Write("<script>alert(&#39;圖文素材修改失??！&#39;);</script>");
   }

   }

  }

  }
  else
  {
  //新增圖文素材
  }
 }

需注意：新建圖文頁面和修改圖文頁面是公用的一個(gè)頁面.......

編輯提交按鈕和保存按鈕是公用的一個(gè)按鈕.....

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