1 微信开放平台 ： https://open.weixin.qq测试数据/
2 微信官方教程： https://open.weixin.qq测试数据/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419316505&token=&lang=zh_CN
3.pc页面显示
4. 通过官方提供的文档，我们可以看出一共分4个步骤
第一步：请求code
第二步：通过code获取access_token
第三步：通过access_token调用接口
第4步：获取用户个人信息（unionid机制）
api：核心代码
public class weixin_helper
{
public weixin_helper()
{
}
/// <summary>
/// 根据appid和appsecret获得access token(默认过期时间为2小时)
/// </summary>
/// <returns>dictionary</returns>
public static dictionary< string , object > get_access_token()
{
//获得配置信息
oauth_config config = oauth_helper.get_config(2);
string send_url = "https://api.weixin.qq测试数据/cgi-bin/token?grant_type=client_credential&appid=" +
config.oauth_app_id + "&secret=" + config.oauth_app_key + "" ;
//发送并接受返回值
string result = utils.httpget(send_url);
if (result.contains( "errmsg" ))
{
return null ;
}
try
{
dictionary< string , object > dic = jsonconvert.deserializeobject<dictionary< string , object >>(result);
return dic;
}
catch
{
return null ;
}
} /// <summary>
/// 取得临时的access token(默认过期时间为2小时)
/// </summary>
/// <param name="code">临时authorization code</param>
/// <param name="state">防止csrf攻击，成功授权后回调时会原样带回</param>
/// <returns>dictionary</returns>
public static dictionary< string , object > get_access_token( string code, string state)
{
//获得配置信息
oauth_config config = oauth_helper.get_config(2);
string send_url = "https://api.weixin.qq测试数据/sns/oauth2/access_token?appid=" +
config.oauth_app_id + "&secret=" + config.oauth_app_key + "&code=" +code+ "&grant_type=authorization_code" ;
//发送并接受返回值
string result = utils.httpget(send_url);
if (result.contains( "errmsg" ))
{
return null ;
}
try
{
dictionary< string , object > dic = jsonconvert.deserializeobject<dictionary< string , object >>(result);
return dic;
}
catch
{
return null ;
}
}
/// <summary>
/// 根据access_token判断access_token是否过期
/// </summary>
/// <param name="access_token"></param>
/// <returns>true表示未失效</returns>
public static bool check_access_token( string access_token)
{
//获得配置信息
oauth_config config = oauth_helper.get_config(2);
string send_url = "https://api.weixin.qq测试数据/sns/auth?access_token=" + access_token + "&openid=" + config.oauth_app_id;
//发送并接受返回值
string result = utils.httpget(send_url);
try
{
dictionary< string , object > dic = jsonconvert.deserializeobject<dictionary< string , object >>(result);
if (dic.containskey( "errmsg" ))
{
if (dic[ "errmsg" ].tostring()== "ok" )
{
return true ;
}
else
{
return false ;
}
}
return false ;
}
catch
{
return false ;
}
}
/// <summary>
/// 若fresh_token已过期则根据refresh_token取得新的refresh_token
/// </summary>
/// <param name="refresh_token">refresh_token</param>
/// <returns>dictionary</returns>
public static dictionary< string , object > get_refresh_token( string refresh_token)
{
//获得配置信息
oauth_config config = oauth_helper.get_config(2);
string send_url =
"https://api.weixin.qq测试数据/sns/oauth2/refresh_token?appid=" +
config.oauth_app_id + "&grant_type=refresh_token&refresh_token=" + refresh_token;
//发送并接受返回值
string result = utils.httpget(send_url);
if (result.contains( "errmsg" ))
{
return null ;
}
try
{
dictionary< string , object > dic = jsonconvert.deserializeobject<dictionary< string , object >>(result);
return dic;
}
catch
{
return null ;
}
}
/// <summary>
/// 获取登录用户自己的基本资料
/// </summary>
/// <param name="access_token">临时的access token</param>
/// <param name="open_id">用户openid</param>
/// <returns>dictionary</returns>
public static dictionary< string , object > get_user_info( string access_token, string open_id)
{
//获得配置信息
oauth_config config = oauth_helper.get_config(2);
//发送并接受返回值
string send_url = "https://api.weixin.qq测试数据/sns/userinfo?access_token=" +access_token+ "&openid=" +open_id;
//发送并接受返回值
string result = utils.httpget(send_url);
if (result.contains( "errmsg" ))
{
return null ;
}
//反序列化json
dictionary< string , object > dic = jsonhelper.datarowfromjson(result);
return dic;
}
}
控制器的核心代码：
#region 微信登录
/// <summary>
/// 微信登录
/// </summary>
public actionresult wechat()
{
//获得配置信息
oauth_config config = oauth_helper.get_config(2); //主键id
if (config == null )
{
return content( "出错了，您尚未配置微信相关的api信息！" );
}
string state = guid.newguid().tostring().replace( "-" , "" );
session[ "oauth_state" ] = state;
string send_url =
"https://open.weixin.qq测试数据/connect/qrconnect?appid=" + config.oauth_app_id +
"&redirect_uri=" + utils.urlencode(config.return_uri.tolower()) +
"&response_type=code&scope=snsapi_login&state=" + state +
"#wechat_redirect" ;
//开始发送
return redirect(send_url); //跳转到微信自己 指定的关联登陆页面
}
/// <summary>
/// 微信登录返回action
/// </summary>
public actionresult wechatreturnurl( string state, string code)
{
//取得返回参数
string access_token = string .empty;
string expires_in = string .empty;
string client_id = string .empty;
string openid = string .empty;
string refresh_token = string .empty;
if (session[ "oauth_state" ] == null || session[ "oauth_state" ].tostring() == "" ||
state != session[ "oauth_state" ].tostring() || string .isnullorempty(code)) //若返回参数中未包含code或者state没有通过验证则提示出错
{
return content( "出错啦，state未初始化！" );
}
//第一步：通过code来获取access token以及openid
dictionary< string , object > dic1 = weixin_helper.get_access_token(code, state);
if (dic1 == null || !dic1.containskey( "access_token" ))
{
return content( "错误代码：，无法获取access token，请检查app key是否正确！" );
}
if (dic1 == null || !dic1.containskey( "openid" ))
{
if (dic1.containskey( "errmsg" ))
{
return content( "errcode：" + dic1[ "errcode" ] + ",errmsg：" + dic1[ "errmsg" ]);
}
else
{
return content( "出错啦，无法获取用户授权openid！" );
}
}
access_token = dic1[ "access_token" ].tostring(); //获取access_token
expires_in = dic1[ "expires_in" ].tostring(); //获取过期时间
refresh_token = dic1[ "refresh_token" ].tostring(); //获取用于重新刷新access_token的凭证
openid = dic1[ "openid" ].tostring(); //用户唯一标示openid
//储存获取数据用到的信息
session[ "oauth_name" ] = "webchat" ;
session[ "oauth_access_token" ] = access_token;
session[ "oauth_openid" ] = openid;
session[ "oauth_refresh_token" ] = refresh_token;
#region todo 将获取到的用户信息保存到数据库中
#endregion
//第二步：通过access token以及openid来获取用户的基本信息
//dictionary<string, object> dic2 = weixin_helper.get_user_info(access_token,openid);
//第三步：跳转到指定页面
return content(wechatresultjson());
}
/// <summary>
/// 微信登录返回action, 处理用户信息
/// </summary>
public string wechatresultjson()
{
string oauth_access_token = string .empty;
string oauth_openid = string .empty;
string oauth_name = string .empty;
string oauth_refresh_token = string .empty;
if (session[ "oauth_name" ] == null || session[ "oauth_access_token" ] == null ||
session[ "oauth_openid" ] == null )
{
return "{\"ret\":\"1\", \"msg\":\"出错啦，access token已过期或不存在！\"}" ;
}
oauth_name = session[ "oauth_name" ].tostring();
oauth_access_token = session[ "oauth_access_token" ].tostring();
oauth_openid = session[ "oauth_openid" ].tostring();
oauth_refresh_token = session[ "oauth_refresh_token" ].tostring();
if (!weixin_helper.check_access_token(oauth_access_token)) //调用access_token前需判断是否过期
{
dictionary< string , object > dic1 = weixin_helper.get_refresh_token(oauth_refresh_token); //如果已过期则重新换取新的access_token
if (dic1 == null || !dic1.containskey( "access_token" ))
{
return "{\"openid\":\"0\", \"msg\":\"出错啦，无法获取access_token！\"}" ;
}
oauth_access_token = dic1[ "access_token" ].tostring();
}
dictionary< string , object > dic = weixin_helper.get_user_info(oauth_access_token, oauth_openid);
if (dic == null )
{
return "{\"openid\":\"0\", \"msg\":\"出错啦，无法获取授权用户信息！\"}" ;
}
try
{
stringbuilder str = new stringbuilder();
str.append( "{" );
str.append( "\"openid\": \"" + dic[ "openid" ].tostring() + "\", " );
str.append( "\"nickname\": \"" + dic[ "nickname" ].tostring() + "\", " );
str.append( "\"sex\": \"" + dic[ "sex" ].tostring() + "\", " );
str.append( "\"province\": \"" + dic[ "province" ].tostring() + "\", " );
str.append( "\"city\": \"" + dic[ "city" ].tostring() + "\", " );
str.append( "\"country\": \"" + dic[ "country" ].tostring() + "\", " );
str.append( "\"headimgurl\": \"" + dic[ "headimgurl" ].tostring() + "\", " );
str.append( "\"privilege\": \"" + dic[ "privilege" ].tostring() + "\", " );
str.append( "\"unionid\": \"" + dic[ "unionid" ].tostring() + "\"" );
str.append( "\"oauth_name\": \"" + oauth_name + "\"" );
str.append( "\"oauth_access_token\": \"" + oauth_access_token + "\"" );
str.append( "\"oauth_openid\": \"" + oauth_openid + "\"" );
str.append( "}" );
return str.tostring();
}
catch
{
return "{\"ret\":\"0\", \"msg\":\"出错啦，无法获取授权用户信息！\"}" ;
}
}
#endregion
dy("nrwz");
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