This article mainly introduces the relevant content of advanced mass text messaging in asp.net WeChat development. Friends who need it can refer to it
First of all, let’s explain the process of mass text messaging. I personally developed The program must first have a UI before you can start writing code. The interface is as follows,
Looking at the picture, we can also see that first we need to obtain This WeChat account can also send several messages in groups this month. As for how to calculate, if a message is successfully sent in a group, a message will be stored in the local database to calculate the number of messages (I believe this can be done). If more than 4 messages are sent, it cannot be sent ( I have already restricted it here, because the service account can only send 4 messages per month, and it is useless to send more. The user can only receive 4 messages, unless the preview function is used to send them one by one, but the preview function can only send 100 times. Maybe you can use the developer mode to send group messages N times more, because after I sent the group message twice, I went to the backend of the WeChat public platform official website and saw that I could still send 4 messages in a group, which was a bit depressing), the target of the group message! You can choose to all users or group users, and to save the number of group messages, I will not test group text messages here. Please refer to the following code for details:
Bind the remaining number of group messages this month
/// <summary>
/// 綁定本月剩余群發(fā)條數(shù)
/// </summary>
private void BindMassCount()
{
WxMassService wms = new WxMassService();
List<WxMassInfo> wxmaslist = wms.GetMonthMassCount();
//官方微信服務(wù)號(hào)每月只能群發(fā)4條信息，（訂閱號(hào)每天1條）多余信息，將不會(huì)成功推送，這里已經(jīng)設(shè)定為4
this.lbMassCounts.Text = (4 - int.Parse(wxmaslist.Count.ToString())).ToString();
if (wxmaslist.Count >= 4)
{
this.LinkBtnSubSend.Enabled = false;
this.LinkBtnSubSend.Attributes.Add("Onclick", "return confirm('群發(fā)信息已達(dá)上限！請(qǐng)下月初再試！')");
}
else
{
this.LinkBtnSubSend.Enabled = true;
this.LinkBtnSubSend.Attributes.Add("Onclick", "return confirm('您確定要群發(fā)此條信息？？')");
}
}Binding group list
/// <summary>
/// 綁定分組列表
/// </summary>
private void BindGroupList()
{
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(guò)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 jsonres = "";
string content = Cache["AllGroups_content"] as string;
if (content == null)
{
jsonres = "https://api.weixin.qq.com/cgi-bin/groups/get?access_token=" + Access_tokento;
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(jsonres);
myRequest.Method = "GET";
HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
content = reader.ReadToEnd();
reader.Close();
//設(shè)置緩存的數(shù)據(jù)7000秒后過(guò)期
Cache.Insert("AllGroups_content", content, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
}
//使用前需要引用Newtonsoft.json.dll文件
JObject jsonObj = JObject.Parse(content);
int groupsnum = jsonObj["groups"].Count();
this.DDLGroupList.Items.Clear();//清除
for (int i = 0; i < groupsnum; i++)
{
this.DDLGroupList.Items.Add(new ListItem(jsonObj["groups"][i]["name"].ToString() + "(" + jsonObj["groups"][i]["count"].ToString() + ")", jsonObj["groups"][i]["id"].ToString()));
}
}
/// <summary>
/// 選擇群發(fā)對(duì)象類(lèi)型，顯示隱藏分組列表項(xiàng)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void DDLMassType_SelectedIndexChanged(object sender, EventArgs e)
{
if (int.Parse(this.DDLMassType.SelectedValue.ToString()) > 0)
{
this.DDLGroupList.Visible = true;
}
else
{
this.DDLGroupList.Visible = false;
}
}群發(fā)
#
/// <summary>
/// 群發(fā)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void LinkBtnSubSend_Click(object sender, EventArgs e)
{
//根據(jù)單選按鈕判斷類(lèi)型，發(fā)送
///如果選擇的是文本消息
if (this.RadioBtnList.SelectedValue.ToString().Equals("0"))
{
if (String.IsNullOrWhiteSpace(this.txtwenben.InnerText.ToString().Trim()))
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('請(qǐng)輸入您要群發(fā)文本內(nèi)容！');", true);
return;
}
if (this.txtwenben.InnerText.ToString().Trim().Length<10)
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('文本內(nèi)容至少需要10個(gè)字符以上！');", true);
return;
}
WxMassService wms = new WxMassService();
List<WxMassInfo> wxmaslist = wms.GetMonthMassCount();
if (wxmaslist.Count >= 4)
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('本月可群發(fā)消息數(shù)量已達(dá)上限！');", true);
return;
}
else
{
//如何群發(fā)類(lèi)型為全部用戶，根據(jù)openID列表群發(fā)給全部用戶，訂閱號(hào)不可用，服務(wù)號(hào)認(rèn)證后可用
if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
{
StringBuilder sbs = new StringBuilder();
sbs.Append(GetAllUserOpenIDList());
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(guò)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;
///群發(fā)POST數(shù)據(jù)示例如下：
// {
// "touser":[
// "OPENID1",
// "OPENID2"
// ],
// "msgtype": "text",
// "text": { "content": "hello from boxer."}
//}
string postData = "{\"touser\":[" + sbs.ToString() +
"],\"msgtype\":\"text\",\"text\":{\"content\":\"" + this.txtwenben.InnerText.ToString() +
"\"}";
string tuwenres = wxs.GetPage(posturl, postData);
//使用前需藥引用Newtonsoft.json.dll文件
JObject jsonObj = JObject.Parse(tuwenres);
if (jsonObj["errcode"].ToString().Equals("0"))
{
//群發(fā)成功后，保存記錄
WxMassInfo wmi = new WxMassInfo();
wmi.ImageUrl = "";
wmi.type = "文本";
wmi.contents = this.txtwenben.InnerText.ToString().Trim();
wmi.title = this.txtwenben.InnerText.ToString().Substring(0, 10) + "...";
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";//群發(fā)成功之后返回的狀態(tài)碼
wmi.massMessageID = jsonObj["msg_id"].ToString();//群發(fā)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('群發(fā)任務(wù)已提交成功！??！數(shù)據(jù)已保存！');location='WxMassManage.aspx';", true);
return;
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)已提交成功?。?！數(shù)據(jù)保存失敗！');", true);
return;
}
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)提交失敗??！');", true);
return;
}
}
else
{
string group_id = this.DDLGroupList.SelectedValue.ToString();
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(guò)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;
///群發(fā)POST數(shù)據(jù)示例如下：
// {
// "filter":{
// "is_to_all":false
// "group_id":"2"
// },
// "text":{
// "content":"CONTENT"
// },
// "msgtype":"text"
//}
//}
string postData = "{\"filter\":{\"is_to_all\":\"false\"\"group_id\":\"" + group_id +
"\"},\"text\":{\"content\":\"" + this.txtwenben.InnerText.ToString() +
"\"},\"msgtype\":\"text\"}";
string tuwenres = wxs.GetPage(posturl, postData);
//使用前需藥引用Newtonsoft.json.dll文件
JObject jsonObj = JObject.Parse(tuwenres);
if (jsonObj["errcode"].ToString().Equals("0"))
{
//群發(fā)成功后，保存記錄
WxMassInfo wmi = new WxMassInfo();
wmi.ImageUrl = "";
wmi.type = "文本";
wmi.contents = this.txtwenben.InnerText.ToString().Trim();
wmi.title = this.txtwenben.InnerText.ToString().Substring(0, 10) + "...";
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";//群發(fā)成功之后返回的狀態(tài)碼
wmi.massMessageID = jsonObj["msg_id"].ToString();//群發(fā)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('群發(fā)任務(wù)已提交成功！??！數(shù)據(jù)已保存！');location='WxMassManage.aspx';", true);
return;
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)已提交成功?。。?shù)據(jù)保存失??！');", true);
return;
}
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)提交失?。?！');", true);
return;
}
}
}
}
//如果選擇的是圖文消息
if (this.RadioBtnList.SelectedValue.ToString().Equals("1"))
{
if (String.IsNullOrWhiteSpace(this.lbtuwenmedai_id.Text.ToString().Trim()))
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('請(qǐng)選擇或新建圖文素材再進(jìn)行群發(fā)！');", true);
return;
}
WxMassService wms = new WxMassService();
List<WxMassInfo> wxmaslist = wms.GetMonthMassCount();
if (wxmaslist.Count >= 4)
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('本月可群發(fā)消息數(shù)量已達(dá)上限！');", true);
return;
}
else
{
//如何群發(fā)類(lèi)型為全部用戶，根據(jù)openID列表群發(fā)給全部用戶，訂閱號(hào)不可用，服務(wù)號(hào)認(rèn)證后可用
if (this.DDLMassType.SelectedValue.ToString().Equals("0"))
{
StringBuilder sbs = new StringBuilder();
sbs.Append(GetAllUserOpenIDList());
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(guò)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;
///群發(fā)POST數(shù)據(jù)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);
//使用前需藥引用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 = "圖文";
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";//群發(fā)成功之后返回的狀態(tài)碼
wmi.massMessageID = jsonObj["msg_id"].ToString();//群發(fā)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('群發(fā)任務(wù)已提交成功?。?！數(shù)據(jù)已保存！');location='WxMassManage.aspx';", true);
return;
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)已提交成功?。?！數(shù)據(jù)保存失敗！');", true);
return;
}
}
else
{
wmi.title = "";
wmi.contents = "";
wmi.ImageUrl = "";
wmi.type = "圖文";
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";//群發(fā)成功之后返回的狀態(tài)碼
wmi.massMessageID = jsonObj["msg_id"].ToString();//群發(fā)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('群發(fā)任務(wù)已提交成功?。?！圖文部分?jǐn)?shù)據(jù)已保存！');location='WxMassManage.aspx';", true);
return;
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)已提交成功?。?！數(shù)據(jù)保存失?。?amp;#39;);", true);
return;
}
}
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)提交失?。。?amp;#39;);", true);
return;
}
}
else
{
//根據(jù)分組進(jìn)行群發(fā)，訂閱號(hào)和服務(wù)號(hào)認(rèn)證后均可用
string group_id = this.DDLGroupList.SelectedValue.ToString();
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(guò)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;
///群發(fā)POST數(shù)據(jù)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);
//使用前需藥引用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 = "圖文";
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";//群發(fā)成功之后返回的狀態(tài)碼
wmi.massMessageID = jsonObj["msg_id"].ToString();//群發(fā)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('群發(fā)任務(wù)已提交成功?。?！數(shù)據(jù)已保存！');location='WxMassManage.aspx';", true);
return;
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)已提交成功?。?！數(shù)據(jù)保存失敗！');", true);
return;
}
}
else
{
wmi.title = "";
wmi.contents = "";
wmi.ImageUrl = "";
wmi.type = "圖文";
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";//群發(fā)成功之后返回的狀態(tài)碼
wmi.massMessageID = jsonObj["msg_id"].ToString();//群發(fā)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('群發(fā)任務(wù)已提交成功！?。D文部分?jǐn)?shù)據(jù)已保存！');location='WxMassManage.aspx';", true);
return;
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)已提交成功?。?！數(shù)據(jù)保存失??！');", true);
return;
}
}
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('群發(fā)任務(wù)提交失?。?！');", true);
return;
}
}
}
}
}Preview before sending
/// <summary>
/// 發(fā)送前預(yù)覽
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void LinkBtnSendPreview_Click(object sender, EventArgs e)
{
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(guò)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/preview?access_token=" + Access_tokento;
///如果選擇的是文本消息
if (this.RadioBtnList.SelectedValue.ToString().Equals("0"))
{
if (String.IsNullOrWhiteSpace(this.txtwenben.InnerText.ToString().Trim()))
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('請(qǐng)輸入您要發(fā)送預(yù)覽的文本內(nèi)容！');", true);
return;
}
if (this.txttoUserName.Value.ToString().Trim().Equals("請(qǐng)輸入用戶微信號(hào)"))
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('請(qǐng)輸入接收消息的用戶微信號(hào)！');", true);
return;
}
//文本消息的json數(shù)據(jù){
// "touser":"OPENID", 可改為對(duì)微信號(hào)預(yù)覽，例如towxname：zhangsan
// "text":{
// "content":"CONTENT"
// },
// "msgtype":"text"
//}
string postData = "{\"towxname\":\"" + this.txttoUserName.Value.ToString() +
"\",\"text\":{\"content\":\"" + this.txtwenben.InnerText.ToString() +
"\"},\"msgtype\":\"text\"}";
string tuwenres = wxs.GetPage(posturl, postData);
//使用前需藥引用Newtonsoft.json.dll文件
JObject jsonObj = JObject.Parse(tuwenres);
if (jsonObj["errcode"].ToString().Equals("0"))
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('發(fā)送預(yù)覽成功！！');", true);
return;
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('發(fā)送預(yù)覽失敗??！');", true);
return;
}
}
//如果選擇的是圖文消息
if (this.RadioBtnList.SelectedValue.ToString().Equals("1"))
{
if(String.IsNullOrWhiteSpace(this.lbtuwenmedai_id.Text.ToString().Trim()))
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('請(qǐng)選擇要預(yù)覽的圖文素材！');", true);
return;
}
if (this.txttoUserName.Value.ToString().Trim().Equals("請(qǐng)輸入用戶微信號(hào)"))
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('請(qǐng)輸入接收消息的用戶微信號(hào)！');", true);
return;
}
//圖文消息的json數(shù)據(jù){
// "touser":"OPENID", 可改為對(duì)微信號(hào)預(yù)覽，例如towxname：zhangsan
// "mpnews":{
// "media_id":"123dsdajkasd231jhksad"
// },
// "msgtype":"mpnews"
//}
string postData = "{\"towxname\":\"" + this.txttoUserName.Value.ToString() +
"\",\"mpnews\":{\"media_id\":\"" + this.lbtuwenmedai_id.Text.ToString() +
"\"},\"msgtype\":\"mpnews\"}";
string tuwenres = wxs.GetPage(posturl, postData);
//使用前需藥引用Newtonsoft.json.dll文件
JObject jsonObj = JObject.Parse(tuwenres);
if (jsonObj["errcode"].ToString().Equals("0"))
{
Session["media_id"] = null;
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('發(fā)送預(yù)覽成功??！');", true);
return;
}
else
{
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "", "alert('發(fā)送預(yù)覽失敗?。?amp;#39;);", true);
return;
}
}
}The key part is to obtain the openIDs of all users and concatenate them into strings:
/// <summary>
/// 獲取所有微信用戶的OpenID
/// </summary>
/// <returns></returns>
protected string GetAllUserOpenIDList()
{
StringBuilder sb = new StringBuilder();
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(guò)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 jsonres = "";
string content = Cache["AllUserOpenList_content"] as string;
if (content == null)
{
jsonres = "https://api.weixin.qq.com/cgi-bin/user/get?access_token=" + Access_tokento;
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(jsonres);
myRequest.Method = "GET";
HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
content = reader.ReadToEnd();
reader.Close();
//設(shè)置緩存的數(shù)據(jù)7000秒后過(guò)期
Cache.Insert("AllUserOpenList_content", content, null, DateTime.Now.AddSeconds(7000), System.Web.Caching.Cache.NoSlidingExpiration);
}
//使用前需要引用Newtonsoft.json.dll文件
JObject jsonObj = JObject.Parse(content);
if (jsonObj.ToString().Contains("count"))
{
int totalnum = int.Parse(jsonObj["count"].ToString());
for (int i = 0; i < totalnum; i++)
{
sb.Append('"');
sb.Append(jsonObj["data"]["openid"][i].ToString());
sb.Append('"');
sb.Append(",");
}
}
return sb.Remove(sb.ToString().LastIndexOf(","),1).ToString();
}This is the end, next chapter We will continue to explain the group sending of graphic and text information. Because before sending the graphic and text information to a group, you need to upload the materials required for the graphic and text information and obtain the media_id, so this chapter will not introduce it. The next chapter will introduce how to create a single graphic and text message and send it to a group. I hope you will like. For more asp.net WeChat development (advanced group text) related articles, please pay attention to the PHP Chinese website!
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