有时候，需要把一个类的相同名称的字段、属性相互赋值，难道要一句一句代码的写？在数据库操作的模型中，视图模型和表模型有一定的字段是同名的，很多时候可能需要从视图模型复制到表模型，或者反过来。。。
重复劳动是比较郁闷，我又比较懒。所以写了个转换器：
using System.Collections.Generic; using System.Linq; using System.Reflection; using System.Collections; namespace SilverlightApplication1 { /// <summary> /// 类属性/字段的值复制工具 /// </summary> public class ClassValueCopier { /// <summary> /// 复制 /// </summary> /// <param name="destination">目标</param> /// <param name="source">来源</param> /// <returns>成功复制的值个数</returns> public static int Copy(object destination, object source) { if (destination == null || source == null) { return 0; } return Copy(destination, source, source.GetType()); } /// <summary> /// 复制 /// </summary> /// <param name="destination">目标</param> /// <param name="source">来源</param> /// <param name="type">复制的属性字段模板</param> /// <returns>成功复制的值个数</returns> public static int Copy(object destination, object source, Type type) { return Copy(destination, source, type, null); } /// <summary> /// 复制 /// </summary> /// <param name="destination">目标</param> /// <param name="source">来源</param> /// <param name="type">复制的属性字段模板</param> /// <param name="excludeName">排除下列名称的属性不要复制</param> /// <returns>成功复制的值个数</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 扩展方法 For .NET 3.0+ /// <summary> /// 类属性/字段的值复制工具 扩展方法 /// </summary> public static class ClassValueCopier2 { /// <summary> /// 获取实体类的属性名称 /// </summary> /// <param name="source">实体类</param> /// <returns>属性名称列表</returns> public static List<string> GetPropertyNames(this object source) { if (source == null) { return new List<string>(); } return GetPropertyNames(source.GetType()); } /// <summary> /// 获取类类型的属性名称（按声明顺序） /// </summary> /// <param name="source">类类型</param> /// <returns>属性名称列表</returns> public static List<string> GetPropertyNames(this Type source) { return GetPropertyNames(source, true); } /// <summary> /// 获取类类型的属性名称 /// </summary> /// <param name="source">类类型</param> /// <param name="declarationOrder">是否按声明顺序排序</param> /// <returns>属性名称列表</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> /// 从源对象赋值到当前对象 /// </summary> /// <param name="destination">当前对象</param> /// <param name="source">源对象</param> /// <returns>成功复制的值个数</returns> public static int CopyValueFrom(this object destination, object source) { return CopyValueFrom(destination, source, null); } /// <summary> /// 从源对象赋值到当前对象 /// </summary> /// <param name="destination">当前对象</param> /// <param name="source">源对象</param> /// <param name="excludeName">排除下列名称的属性不要复制</param> /// <returns>成功复制的值个数</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> /// 从当前对象赋值到目标对象 /// </summary> /// <param name="source">当前对象</param> /// <param name="destination">目标对象</param> /// <returns>成功复制的值个数</returns> public static int CopyValueTo(this object source, object destination) { return CopyValueTo(destination, source, null); } /// <summary> /// 从当前对象赋值到目标对象 /// </summary> /// <param name="source">当前对象</param> /// <param name="destination">目标对象</param> /// <param name="excludeName">排除下列名称的属性不要复制</param> /// <returns>成功复制的值个数</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 } |
说明：
1，只能复制相同名称，相同类型的字段、属性
2，可以选择只复制某个父类、接口下的字段和属性
3，如果你的 .NET 版本不是 3.0及以上，得删掉扩展方法和 Linq 的引用
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