C#微信公众号接口开发实例-高级接口-申请带参数的二维码

  最近公司涉及到微信绑定用户,做了高级接口-申请带参数的二维码,总结了下微信开发接口。微信接口开发都是除了消息用的xml 回复基本上都是用json的形式传递信息(post/get),开发的方法基本都是一样的,以下以高级接口获取带参数的二维码为例,怎么做微信接口开发。

第一步:获取access_token,access_token是获取其他接口信息的钥匙,所有接口都需要调用access_token

     /// <summary>
/// 拉取AccessToken,微信每天公共2000次AccessToken的获取,所以需要缓存AccessToken
/// </summary>
/// <returns>用户凭证:AccessToken</returns>
public string getTokenSession(string appid,string appsecret)
{
string TokenSession;
if (Session[AccessToken] != null)
{
TokenSession = Session[AccessToken].ToString();
}
else
{
TokenSession = addTokenSession(appid, appsecret);
}
return TokenSession;
} /// <summary>
/// 将AccessToken添加到缓存
/// </summary>
/// <returns>AccessToken</returns>
public string addTokenSession(string appid, string appsecret)
{
//获取AccessToken
string AccessToken = GetAccessToken(appid,appsecret);
HttpContext.Current.Session[AccessToken] = AccessToken;
HttpContext.Current.Session.Timeout = ;
return AccessToken;
} /// <summary>
/// 获取AccessToken
/// </summary>
/// <returns>AccessToken</returns>
public string GetAccessToken(string appid, string appsecret)
{
string accessToken = "";
string respText = "";
string url = string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appid, appsecret); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse response = (HttpWebResponse)request.GetResponse(); using (Stream resStream = response.GetResponseStream())
{
StreamReader reader = new StreamReader(resStream, Encoding.Default);
respText = reader.ReadToEnd();
resStream.Close();
}
Dictionary<string, object> respDic = (Dictionary<string, object>)Jss.DeserializeObject(respText);
accessToken = respDic["access_token"].ToString();
return accessToken;
}

第二步:利用access_token来获取带参数的二维码

     /// <summary>
/// 调用微信接口获取带参数临时二维码的ticket
/// 使用方法:https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=TICKET
/// </summary>
/// <param name="scene_id">二维码带的参数</param>
/// <returns>json:ticket:换取二维码的凭证,expire_seconds:凭证有效时间,url:二维码解析后的地址。此处返回ticket 否则返回错误码</returns>
public string GetQrcode(string appid, string appsecret, Int32 scene_id)
{
string QrcodeUrl = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token={0}";//WxQrcodeAPI接口
string AccessToken = getTokenSession(appid, appsecret);//拉取AccessToken
QrcodeUrl = string.Format(QrcodeUrl, AccessToken);
string PostJson = "{\"expire_seconds\": 1800, \"action_name\": \"QR_SCENE\", \"action_info\": {\"scene\": {\"scene_id\": " + scene_id + "}}}";
string ReText = WebRequestPostOrGet(QrcodeUrl, PostJson);//post提交
Dictionary<string, object> reDic = (Dictionary<string, object>)Jss.DeserializeObject(ReText);
if (reDic.ContainsKey("ticket"))
{
return reDic["ticket"].ToString();//成功
}
else
{
return reDic["errcode"].ToString();//返回错误码
}
} /// <summary>
/// 调用微信接口获取带参数永久二维码的ticket
/// 使用方法:https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=TICKET
/// </summary>
/// <param name="scene_id">二维码带的参数</param>
/// <returns>json:ticket:换取二维码的凭证,expire_seconds:凭证有效时间,url:二维码解析后的地址。此处返回ticket 否则返回错误码</returns>
public string GetQrcode(string appid, string appsecret, string scene_str)
{
string QrcodeUrl = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token={0}";//WxQrcodeAPI接口
string AccessToken = getTokenSession(appid, appsecret);//拉取AccessToken
QrcodeUrl = string.Format(QrcodeUrl, AccessToken);
string PostJson = "{\"expire_seconds\": 1800, \"action_name\": \"QR_LIMIT_STR_SCENE\", \"action_info\": {\"scene\": {\"scene_str\": " + scene_str + "}}}";
string ReText = WebRequestPostOrGet(QrcodeUrl, PostJson);//此处省略了 WebRequestPostOrGet即为WebHttpRequest发送Post请求
Dictionary<string, object> reDic = (Dictionary<string, object>)Jss.DeserializeObject(ReText);
if (reDic.ContainsKey("ticket"))
{
return reDic["ticket"].ToString();//成功
}
else
{
return reDic["errcode"].ToString();//返回错误码
}
}

第三步:将获取的ticket用https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=TICKET使用就完成了。

微信开发者文档:http://mp.weixin.qq.com/wiki/18/28fc21e7ed87bec960651f0ce873ef8a.html

本文版权归作者(谢俊)和博客园所有,欢迎转载,转载请标明出处。

原文地址:http://www.cnblogs.com/net-xiejun/

微信开发群C#微信公众号接口开发实例-高级接口-申请带参数的二维码

完整源码下载:https://github.com/xiejun-net/weixin

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C#微信公众号接口开发实例-高级接口-申请带参数的二维码

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