天氣預報接口：SmartWeather API中key用c#的計算方法

string GetKey(string appid, string privateKey, string areaId, string date, string type)

{

//使用SHA1的HMAC

HMAC hmac = HMACSHA1.Create();

var publicKey = "/data/?areaid={0}&type={1}&date={2}&appid={3}";

var data = System.Text.Encoding.UTF8.GetBytes(string.Format(publicKey, areaId, type, date, appid));

//密鑰

var key = System.Text.Encoding.UTF8.GetBytes(privateKey);

hmac.Key = key;

//對數據進行簽名

var signedData = hmac.ComputeHash(data);

return Convert.ToBase64String(signedData);

}

參考資料:blogs.com/aptdo2008/p/3566391.html