67 lines
2.3 KiB
C#
67 lines
2.3 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace Services.Extensions
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{
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/// <summary>
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/// 对象扩展
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/// </summary>
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public static class ModelExtensions
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{
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/// <summary>
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/// 创建一个新的类型的对象，并将现有对象的属性值赋给新对象相同名称的属性
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/// </summary>
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/// <typeparam name="T">新对象的类型</typeparam>
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/// <param name="source">现有对象</param>
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/// <returns>新的对象</returns>
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public static T ToModel<T>(this object source) where T : new()
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{
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if (source == null)
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{
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return default(T);
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}
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return Activator.CreateInstance<T>().UpdateFrom(source, new string[0]);
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}
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/// <summary>
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/// 将源对象的属性值赋给目标对象相同名称的属性
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/// </summary>
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/// <typeparam name="T">目标类型</typeparam>
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/// <param name="target">目标对象</param>
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/// <param name="source">源对象</param>
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/// <param name="copyPropertyName">需要复制的属性名,为空时表示复制全部</param>
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/// <returns>目标类型</returns>
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public static T UpdateFrom<T>(this T target, object source, params string[] copyPropertyName)
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{
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if (target == null)
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{
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return default(T);
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}
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if (source == null)
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{
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return target;
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}
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Type typeFromHandle = typeof(T);
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foreach (PropertyInfo obj in source.GetType().GetProperties())
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{
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//PropertyDescriptor propertyDescriptor = (PropertyDescriptor)obj;
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if (copyPropertyName == null || copyPropertyName.Length == 0 || copyPropertyName.Contains(obj.Name))
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{
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PropertyInfo property = typeFromHandle.GetProperty(obj.Name, BindingFlags.Instance | BindingFlags.Public);
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if (property != null && property.CanWrite)
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{
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property.SetValue(target, obj.GetValue(source, null), null);
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}
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}
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}
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return target;
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}
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}
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}
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