/**
*
* 通过code换取网页授权access_token和openid的返回数据，正确时返回的JSON数据包如下：
* {
* "access_token":"ACCESS_TOKEN",
* "expires_in":7200,
* "refresh_token":"REFRESH_TOKEN",
* "openid":"OPENID",
* "scope":"SCOPE",
* "unionid": "o6_bmasdasdsad6_2sgVt7hMZOPfL"
* }
* 其中access_token可用于获取共享收货地址
* openid是微信支付jsapi支付接口统一下单时必须的参数
* 更详细的说明请参考网页授权获取用户基本信息：http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html
* @失败时抛异常WxPayException
*/
public void GetOpenidAndAccessTokenFromCode(string code, WxPayConfig payConfig, PayModel payInfo)
{
try
{
//构造获取openid及access_token的url
WxPayData data = new WxPayData();
data.SetValue("appid", payConfig.APPID);
data.SetValue("secret", payConfig.APPSECRET);
data.SetValue("code", code);
data.SetValue("grant_type", "authorization_code");
string url = "https://api.weixin.qq.com/sns/oauth2/access_token?" + data.ToUrl();
//请求url以获取数据
string result = HttpService.Get(url);
//保存access_token，用于收货地址获取
JsonData jd = JsonMapper.ToObject(result);
payInfo.access_token = (string)jd["access_token"];
//获取用户openid
payInfo.openid = (string)jd["openid"];
}
catch (Exception ex)
{
throw new WxPayException(ex.ToString());
}
}
//public PayModel payInfo = new PayModel();
/**
*
* 网页授权获取用户基本信息的全部过程
* 详情请参看网页授权获取用户基本信息：http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html
* 第一步：利用url跳转获取code
* 第二步：利用code去获取openid和access_token
*
*/
public void GetOpenidAndAccessToken(string code, WxPayConfig payConfig, PayModel payInfo, string urlParam, string scopeTyp)
{
if (code != "-1")
{
//获取code码，以获取openid和access_token
GetOpenidAndAccessTokenFromCode(code, payConfig, payInfo);
}
else
{
//构造网页授权获取code的URL
string redirect_uri = HttpUtility.UrlEncode(payConfig.FRONT_URL + urlParam);
WxPayData data = new WxPayData();
data.SetValue("appid", payConfig.APPID);
data.SetValue("redirect_uri", redirect_uri);
data.SetValue("response_type", "code");
data.SetValue("scope", string.IsNullOrEmpty(scopeTyp) ? "snsapi_base": scopeTyp); // snsapi_userinfo
data.SetValue("state", "STATE" + "#wechat_redirect");
string url = "https://open.weixin.qq.com/connect/oauth2/authorize?" + data.ToUrl();
try
{
//触发微信返回code码
// page.Response.Redirect(url);//Redirect函数会抛出ThreadAbortException异常，不用处理这个异常
payInfo.redirect_url = url;
}
catch (System.Threading.ThreadAbortException ex)
{
}
}
}