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
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/// <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：
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/// <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
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/// <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 = "https://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。
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<!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：
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/// <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：
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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：
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/// <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：
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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：
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/// <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("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.....
以上就是本文的全部内容，希望对大家的学习有所帮助。
