/// <summary>
/// 通过两个点的经纬度计算距离(米)
/// </summary>
/// <param name="lat1"></param>
/// <param name="lng1"></param>
/// <param name="lat2"></param>
/// <param name="lng2"></param>
/// <returns></returns>
public static double GetDistance(string lat1, string lng1, string lat2, string lng2)
{
return(Fun.GetDistance(Convert.ToDouble(lat1), Convert.ToDouble(lng1), Convert.ToDouble(lat2), Convert.ToDouble(lng2)));
}