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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>
</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();
}
</div>
再来看看，新建单图文信息界面：
