经纬度、时分秒转换的C#类

public class optaDataConvert
{

/// <summary>
/// 时间转换
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static DateTime GetDataTime(long value)
{
return new DateTime(1970, 1, 1).AddMilliseconds(value).AddHours(8);
}
/// <summary>
/// 获取经度
/// </summary>
/// <returns></returns>
public static string GetLongitudeValue(decimal value)
{
ArrayList arrList = LgetValid(value);
if (arrList == null)
return string.Empty;
if (arrList.Count != 3)
return string.Empty;
return string.Format("{0}°{1}.{2}' {3}", arrList[0], arrList[1], arrList[2], value > 0 ? "E" : "W");
}
/// <summary>
/// 获取纬度
/// </summary>
/// <returns></returns>
public static string GetLatitudeValue(decimal value)
{
ArrayList arrList = LgetValid(value);
if (arrList == null)
return string.Empty;
if (arrList.Count != 3)
return string.Empty;
return string.Format("{0}°{1}.{2}' {3}", arrList[0], arrList[1], arrList[2], value > 0 ? "N" : "S");
}
/// <summary>
/// 获取经纬度度分秒
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public  static ArrayList LgetValid(decimal value)
{
ArrayList aList = new ArrayList();
string excute = ChangeValue(value);
string[] sArray = excute.Split('|');
aList.Insert(0, sArray[0]);
aList.Insert(1, sArray[1]);
aList.Insert(2, sArray[2]);
return aList;
}
/// <summary>
/// 经纬度转换
/// </summary>
/// <param name="str">经度</param>
/// <param name="num">保留8位值</param>
/// <returns></returns>
protected static string ChangeValue(decimal degree)
{
if (degree < 0)
{
degree = -degree;
}
decimal minute = (degree - (int)degree) * 60;
decimal second = (minute - (int)minute) * 60;
return ((int)degree).ToString() + "|" + ((int)minute).ToString() + "|" + ((int)second).ToString();
}
public static decimal TimeToValue(string Degrees, string Minutes, string Seconds)
{
decimal Value = decimal.Parse(Minutes) + decimal.Parse(Minutes) / 60 + decimal.Parse(Seconds) / 3600;
return Value;
}
}

}

m_cardpoint.X = optaDataConvert.TimeToValue(X_Du.Text, X_Fen.Text, X_Miao.Text);
m_cardpoint.Y = optaDataConvert.TimeToValue(Y_Du.Text, Y_Fen.Text, Y_Miao.Text);

（其中m_cardpoint.X 、m_cardpoint.Y 为存储经纬度的值）

ArrayList arrlistLatitude = optaDataConvert.LgetValid(m_cardpoint.Y);
Y_Du.Text = arrlistLatitude[0].ToString();
Y_Fen.Text = arrlistLatitude[1].ToString();
Y_Miao.Text = arrlistLatitude[2].ToString();