using System.Web;
/// <summary>
/// 公共帮助类
/// </summary>
public class Common {
private HttpContext Context {
get;
set; }
public static string OpenId =
"Openid";
public static string access_token =
"access_token";
#region 构造函数
/// <summary>
/// 构造函数
/// </summary>
/// <param name="Context"></param>
public Common(HttpContext context)
{
this.Context =
context;
}
#endregion
#region 通过code换取AccessToken
/// <summary>
/// 通过code换取AccessToken
/// </summary>
public void GetOpenidAndAccessToken()
{
if (!
string.IsNullOrEmpty(Context.Request.QueryString[
"code"]))
{
//获取code码，以获取openid和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);
WxPayData data =
new WxPayData();
data.SetValue("appid",
WxPayConfig.APPID);
data.SetValue("redirect_uri", redirect_uri);
data.SetValue("response_type",
"code");
data.SetValue("scope",
"snsapi_base");
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
Context.Response.Redirect(url);
//Redirect函数会抛出ThreadAbortException异常，不用处理这个异常
}
catch (System.Threading.ThreadAbortException ex)
{
}
}
}
#endregion
#region 通过用户授权获取AccessToken和OpenId
/// <summary>
/// 通过用户授权获取AccessToken和OpenId
/// </summary>
/// <param name="code"></param>
public void GetOpenidAndAccessTokenFromCode(
string code)
{
try
{
//构造获取openid及access_token的url
WxPayData data =
new WxPayData();
data.SetValue("appid",
WxPayConfig.APPID);
data.SetValue("secret",
WxPayConfig.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);
access_token = (
string)jd[
"access_token"];
//获取用户openid
OpenId = (
string)jd[
"openid"];
}
catch (Exception ex)
{
throw new WxPayException(ex.ToString());
}
}
#endregion
#region 获取OpenId
/// <summary>
/// 获取OpenId
/// </summary>
/// <param name="postStr"></param>
/// <returns></returns>
public string GetOpenId()
{
Common common =
new Common(Context);
common.GetOpenidAndAccessToken();
return OpenId;
}
#endregion
}
转载于:https://www.cnblogs.com/siyunianhua/p/9557257.html
