.net通用類型轉換方法

using System;
using System.ComponentModel;
using System.Globalization;

/// <summary>
/// 類型轉換
/// </summary>
/// <param name="value">要轉換的值</param>
/// <param name="destinationType">轉換的目標類型</param>
/// <returns></returns>
public static object To(object value, Type destinationType)
{
    return To(value, destinationType, CultureInfo.InvariantCulture);
}
/// <summary>
/// 類型轉換
/// </summary>
/// <param name="value">要轉換的值</param>
/// <param name="destinationType">轉換的目標類型</param>
/// <param name="culture">區域信息</param>
/// <returns></returns>
public static object To(object value, Type destinationType, CultureInfo culture)
{
    if (value != null)
    {
        var sourceType = value.GetType();

        var destinationConverter = TypeDescriptor.GetConverter(destinationType);
        if (destinationConverter != null && destinationConverter.CanConvertFrom(value.GetType()))
            return destinationConverter.ConvertFrom(null, culture, value);

        var sourceConverter = TypeDescriptor.GetConverter(sourceType);
        if (sourceConverter != null && sourceConverter.CanConvertTo(destinationType))
            return sourceConverter.ConvertTo(null, culture, value, destinationType);

        if (destinationType.IsEnum && value is int)
            return Enum.ToObject(destinationType, (int)value);

        if (!destinationType.IsInstanceOfType(value))
            return Convert.ChangeType(value, destinationType, culture);
    }
    return value;
}
/// <summary>
/// 類型轉換
/// </summary>
/// <typeparam name="T">目標類型</typeparam>
/// <param name="value">要轉換的值</param>
/// <returns></returns>
public static T To<T>(object value)
{
    return (T)To(value, typeof(T));
}