public void GetOpenidAndAccessToken(HttpContext context, string redirectUrl, string state = "STATE", string scope = "snsapi_base")
{
if (!string.IsNullOrEmpty(context.Request.QueryString["code"]))
{
//获取code码，以获取openid和网页授权access_token
string code = context.Request.QueryString["code"];
GetOpenidAndAccessTokenFromCode(code);
}
else
{
//构造网页授权获取code的URL
//string host = context.Request.Url.Host;
//string path = context.Request.Path;
//string redirect_uri = HttpUtility.UrlEncode("http://" + host + path);
if (String.IsNullOrEmpty(redirectUrl))
{
redirectUrl = context.Request.Url.AbsoluteUri.ToString();
}
string redirect_uri = HttpUtility.UrlEncode(redirectUrl);
var data = new ParamsData();
data.SetValue("appid", APPID);
data.SetValue("redirect_uri", redirect_uri);
data.SetValue("response_type", "code");
data.SetValue("scope", scope);
data.SetValue("state", state + "#wechat_redirect");
string url = "https://open.weixin.qq.com/connect/oauth2/authorize?" + data.ToUrl();
context.Response.Redirect(url);
}
}