/// <summary>
/// 字符串与枚举型、TimeSpan与整型之间转换的方法。
/// </summary>
/// <param name="srcType">源数据类型</param>
/// <param name="srcValue">源数据的值</param>
/// <param name="targetType">目标数据类型</param>
/// <returns>类型转换后的结果</returns>
/// <remarks>字符串与枚举型、TimeSpan与整型之间转换的方法。
/// <seealso cref="MCS.Library.Core.XmlHelper"/>
/// </remarks>
public static object ChangeType(System.Type srcType, object srcValue, System.Type targetType)
{
ExceptionHelper.FalseThrow <ArgumentNullException>(targetType != null, "targetType");
bool dealed = false;
object result = null;
if (srcType == typeof(object))
{
if (srcValue != null)
{
srcType = srcValue.GetType();
}
}
if (srcType == targetType)
{
result = srcValue;
dealed = true;
}
else
if (targetType == typeof(object))
{
result = srcValue;
dealed = true;
}
else
if (targetType.IsEnum)
{
if (srcType == typeof(string) || srcType == typeof(int) || srcType == typeof(long))
{
if (srcValue is string && (srcValue).ToString().IsNullOrEmpty())
{
result = Enum.Parse(targetType, "0");
}
else
{
result = Enum.Parse(targetType, srcValue.ToString());
}
dealed = true;
}
}
else
if (targetType == typeof(string) && srcType == typeof(DateTime))
{
result = string.Format("{0:yyyy-MM-ddTHH:mm:ss.fff}", srcValue);
dealed = true;
}
else
if (targetType == typeof(TimeSpan))
{
if (srcType == typeof(TimeSpan))
{
result = srcValue;
}
else
{
result = TimeSpan.FromSeconds((double)Convert.ChangeType(srcValue, typeof(double)));
}
dealed = true;
}
else
if (targetType == typeof(bool) && srcType == typeof(string))
{
result = StringToBool(srcValue.ToString(), out dealed);
}
else
if (targetType == typeof(DateTime))
{
if (srcType == typeof(string))
{
if (srcValue == null || srcValue.ToString() == string.Empty)
{
result = DateTime.MinValue;
dealed = true;
}
}
else
if (typeof(IDictionary <string, object>).IsAssignableFrom(srcType))
{
result = ((IDictionary <string, object>)srcValue).ToDateTime();
dealed = true;
}
}
else
if ((typeof(IDictionary <string, object>).IsAssignableFrom(targetType)) && srcType == typeof(DateTime))
{
result = ((DateTime)srcValue).ToDictionary();
dealed = true;
}
if (dealed == false)
{
if (targetType != typeof(object) && targetType.IsAssignableFrom(srcType))
{
result = srcValue;
}
else if (targetType == typeof(DateTime))
{
result = Convert.ToDateTime(srcValue);
}
else
{
result = Convert.ChangeType(srcValue, targetType);
}
}
return(result);
}