asp.net微信开发（高级群发图文）
网络编程 2021-07-04 22:41www.168986.cn编程入门
这篇文章主要介绍了asp.微信开发中有关高级群发图文的相关内容，需要的朋友可以参考下
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-: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-: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aesstoken
string Aess_token = Cache["Aess_token"] as string;
if (Aess_token == null)
{
//如果为空，重新获取
Aess_token = wxs.GetAessToken();
//设置缓存的数据7000秒后过期
Cache.Insert("Aess_token", Aess_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
}
string Aess_tokento = Aess_token.Substring(17, Aess_token.Length - 37);
string posturl = "https://api.weixin.qq./cgi-bin/material/batchget_material?aess_token=" + Aess_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:\Ipub\root\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aesstoken
string Aess_token = Cache["Aess_token"] as string;
if (Aess_token == null)
{
//如果为空，重新获取
Aess_token = wxs.GetAessToken();
//设置缓存的数据7000秒后过期
Cache.Insert("Aess_token", Aess_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
}
string Aess_tokento = Aess_token.Substring(17, Aess_token.Length - 37);
//WebClient wx_upload = new WebClient();
//wx_upload.Credentials = CredentialCache.DefaultCredentials;
string url = string.Format("http://file.api.weixin.qq./cgi-bin/media/upload?aess_token={0}&type={1}", Aess_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, FileAess.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:\Ipub\root\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aesstoken
string Aess_token = Cache["Aess_token"] as string;
if (Aess_token == null)
{
//如果为空，重新获取
Aess_token = wxs.GetAessToken();
//设置缓存的数据7000秒后过期
Cache.Insert("Aess_token", Aess_token, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
}
string Aess_tokento = Aess_token.Substring(17, Aess_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
// ]
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