有時(shí)候，需要把一個(gè)類的相同名稱的字段、屬性相互賦值，難道要一句一句代碼的寫？在數(shù)據(jù)庫操作的模型中，視圖模型和表模型有一定的字段是同名的，很多時(shí)候可能需要從視圖模型復(fù)制到表模型，或者反過來。。。
重復(fù)勞動(dòng)是比較郁悶，我又比較懶。所以寫了個(gè)轉(zhuǎn)換器：
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using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Collections;
namespace SilverlightApplication1
{
/// <summary>
/// 類屬性/字段的值復(fù)制工具
/// </summary>
public class ClassValueCopier
{
/// <summary>
/// 復(fù)制
/// </summary>
/// <param name="destination">目標(biāo)</param>
/// <param name="source">來源</param>
/// <returns>成功復(fù)制的值個(gè)數(shù)</returns>
public static int Copy(object destination, object source)
{
if (destination == null || source == null)
{
return 0;
}
return Copy(destination, source, source.GetType());
}
/// <summary>
/// 復(fù)制
/// </summary>
/// <param name="destination">目標(biāo)</param>
/// <param name="source">來源</param>
/// <param name="type">復(fù)制的屬性字段模板</param>
/// <returns>成功復(fù)制的值個(gè)數(shù)</returns>
public static int Copy(object destination, object source, Type type)
{
return Copy(destination, source, type, null);
}
/// <summary>
/// 復(fù)制
/// </summary>
/// <param name="destination">目標(biāo)</param>
/// <param name="source">來源</param>
/// <param name="type">復(fù)制的屬性字段模板</param>
/// <param name="excludeName">排除下列名稱的屬性不要復(fù)制</param>
/// <returns>成功復(fù)制的值個(gè)數(shù)</returns>
public static int Copy(object destination, object source, Type type, IEnumerable<string> excludeName)
{
if (destination == null || source == null)
{
return 0;
}
if (excludeName == null)
{
excludeName = new List<string>();
}
int i = 0;
Type desType = destination.GetType();
foreach (FieldInfo mi in type.GetFields())
{
if (excludeName.Contains(mi.Name))
{
continue;
}
try
{
FieldInfo des = desType.GetField(mi.Name);
if (des != null && des.FieldType == mi.FieldType)
{
des.SetValue(destination, mi.GetValue(source));
i++;
}
}
catch
{
}
}
foreach (PropertyInfo pi in type.GetProperties())
{
if (excludeName.Contains(pi.Name))
{
continue;
}
try
{
PropertyInfo des = desType.GetProperty(pi.Name);
if (des != null && des.PropertyType == pi.PropertyType && des.CanWrite && pi.CanRead)
{
des.SetValue(destination, pi.GetValue(source, null), null);
i++;
}
}
catch
{
//throw ex;
}
}
return i;
}
}
#region 擴(kuò)展方法 For .NET 3.0+
/// <summary>
/// 類屬性/字段的值復(fù)制工具 擴(kuò)展方法
/// </summary>
public static class ClassValueCopier2
{
/// <summary>
/// 獲取實(shí)體類的屬性名稱
/// </summary>
/// <param name="source">實(shí)體類</param>
/// <returns>屬性名稱列表</returns>
public static List<string> GetPropertyNames(this object source)
{
if (source == null)
{
return new List<string>();
}
return GetPropertyNames(source.GetType());
}
/// <summary>
/// 獲取類類型的屬性名稱（按聲明順序）
/// </summary>
/// <param name="source">類類型</param>
/// <returns>屬性名稱列表</returns>
public static List<string> GetPropertyNames(this Type source)
{
return GetPropertyNames(source, true);
}
/// <summary>
/// 獲取類類型的屬性名稱
/// </summary>
/// <param name="source">類類型</param>
/// <param name="declarationOrder">是否按聲明順序排序</param>
/// <returns>屬性名稱列表</returns>
public static List<string> GetPropertyNames(this Type source, bool declarationOrder)
{
if (source == null)
{
return new List<string>();
}
var list = source.GetProperties().AsQueryable();
if (declarationOrder)
{
list = list.OrderBy(p => p.MetadataToken);
}
return list.Select(o => o.Name).ToList(); ;
}
/// <summary>
/// 從源對(duì)象賦值到當(dāng)前對(duì)象
/// </summary>
/// <param name="destination">當(dāng)前對(duì)象</param>
/// <param name="source">源對(duì)象</param>
/// <returns>成功復(fù)制的值個(gè)數(shù)</returns>
public static int CopyValueFrom(this object destination, object source)
{
return CopyValueFrom(destination, source, null);
}
/// <summary>
/// 從源對(duì)象賦值到當(dāng)前對(duì)象
/// </summary>
/// <param name="destination">當(dāng)前對(duì)象</param>
/// <param name="source">源對(duì)象</param>
/// <param name="excludeName">排除下列名稱的屬性不要復(fù)制</param>
/// <returns>成功復(fù)制的值個(gè)數(shù)</returns>
public static int CopyValueFrom(this object destination, object source, IEnumerable<string> excludeName)
{
if (destination == null || source == null)
{
return 0;
}
return ClassValueCopier.Copy(destination, source, source.GetType(), excludeName);
}
/// <summary>
/// 從當(dāng)前對(duì)象賦值到目標(biāo)對(duì)象
/// </summary>
/// <param name="source">當(dāng)前對(duì)象</param>
/// <param name="destination">目標(biāo)對(duì)象</param>
/// <returns>成功復(fù)制的值個(gè)數(shù)</returns>
public static int CopyValueTo(this object source, object destination)
{
return CopyValueTo(destination, source, null);
}
/// <summary>
/// 從當(dāng)前對(duì)象賦值到目標(biāo)對(duì)象
/// </summary>
/// <param name="source">當(dāng)前對(duì)象</param>
/// <param name="destination">目標(biāo)對(duì)象</param>
/// <param name="excludeName">排除下列名稱的屬性不要復(fù)制</param>
/// <returns>成功復(fù)制的值個(gè)數(shù)</returns>
public static int CopyValueTo(this object source, object destination, IEnumerable<string> excludeName)
{
if (destination == null || source == null)
{
return 0;
}
return ClassValueCopier.Copy(destination, source, source.GetType(), excludeName);
}
}
#endregion
}
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說明：
1，只能復(fù)制相同名稱，相同類型的字段、屬性
2，可以選擇只復(fù)制某個(gè)父類、接口下的字段和屬性
3，如果你的 .NET 版本不是 3.0及以上，得刪掉擴(kuò)展方法和 Linq 的引用
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