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
}
以上就是本文的全部内容，希望对大家的学习有所帮助。
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