322 lines
12 KiB
C#
322 lines
12 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Data;
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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 Eson.Utils
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{
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/// <summary>
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/// 反射帮助类
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/// </summary>
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public class ExtensiveHelper
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{
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public ExtensiveHelper()
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{ }
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/// <summary>
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/// 将TSource类型的实体类对象转换为TDest类型的实体类对象
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/// </summary>
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/// <typeparam name="TSource">要转换的实体类对象T类型</typeparam>
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/// <typeparam name="TDest">目标实体类对象T类型</typeparam>
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/// <param name="s">要转换的实体类对象</param>
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/// <returns>TDest目标实体类对象</returns>
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public static TDest Map<TSource, TDest>(TSource s)
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where TSource : class, new()
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where TDest : class, new()
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{
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//定义TDest目标返回对象
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TDest oTarget = new TDest();
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//获取TSource, TDest的反射类型以及其公共属性
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Type typeTSource = typeof(TSource);
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Type typeTDest = typeof(TDest);
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PropertyInfo[] propersTSource = typeTSource.GetProperties();
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PropertyInfo[] propersTDest = typeTDest.GetProperties();
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#region 遍历转换
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foreach (PropertyInfo pTDest in propersTDest)
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{
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foreach (PropertyInfo pTSource in propersTSource)
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{
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//如果TSource, TDest的属性名称相同，则可进行转换
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if (pTDest.Name.Equals(pTSource.Name))
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{
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//获取TSource对象该属性的值
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object objValue = pTSource.GetValue(s, null);
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if (null != objValue)
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{
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if (!pTDest.PropertyType.IsGenericType)
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{
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//已知类型
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try
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{
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pTDest.SetValue(oTarget, Convert.ChangeType(objValue, pTDest.PropertyType), null);
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}
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catch
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{
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continue;
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}
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}
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else
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{
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//泛型Nullable<>,未知类型
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Type genericTypeDefinition = pTDest.PropertyType.GetGenericTypeDefinition();
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if (genericTypeDefinition == typeof(Nullable<>))
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{
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pTDest.SetValue(oTarget, Convert.ChangeType(objValue, Nullable.GetUnderlyingType(pTDest.PropertyType)), null);
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}
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}
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}
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break;
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}
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}
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}
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#endregion
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return oTarget;
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}
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/// <summary>
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/// 将TSource类型的实体类泛型List对象转换为TDest类型的泛型List对象
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/// </summary>
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/// <typeparam name="TSource">要转换的实体类对象T类型</typeparam>
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/// <typeparam name="TDest">目标实体类对象T类型</typeparam>
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/// <param name="sList">要转换的泛型List对象</param>
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/// <returns>TDest目标泛型List对象</returns>
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public static List<TDest> Map<TSource, TDest>(List<TSource> sList)
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where TSource : class, new()
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where TDest : class, new()
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{
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List<TDest> list = new List<TDest>();
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if (null == sList)
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{
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return list;
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}
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foreach (TSource s in sList)
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{
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list.Add(Map<TSource, TDest>(s));
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}
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return list;
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}
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/// <summary>
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/// 将TSource类型的实体类泛型List对象转换为TDest类型的泛型List对象
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/// </summary>
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/// <typeparam name="TSource">要转换的实体类对象T类型</typeparam>
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/// <typeparam name="TDest">目标实体类对象T类型</typeparam>
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/// <param name="ISList">要转换的泛型List对象</param>
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/// <returns>TDest目标泛型List对象</returns>
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public static IList<TDest> MapI<TSource, TDest>(IList<TSource> ISList)
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where TSource : class, new()
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where TDest : class, new()
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{
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IList<TDest> Ilist = new List<TDest>();
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if (null == ISList)
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{
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return Ilist;
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}
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foreach (TSource s in ISList)
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{
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Ilist.Add(Map<TSource, TDest>(s));
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}
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return Ilist;
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}
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/// <summary>
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/// 将DataTable数据转换为TDest类型的泛型List对象
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/// </summary>
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/// <typeparam name="TSource">约束DataTabe的行类型T类型</typeparam>
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/// <typeparam name="TDest">目标实体类对象T类型</typeparam>
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/// <param name="tb">DataTabe数据对象</param>
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/// <returns>TDest目标泛型List对象</returns>
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public static List<TDest> Map<TSource, TDest>(DataTable tb)
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where TSource : DataTable
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where TDest : class, new()
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{
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List<TDest> list = new List<TDest>();
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if (null == tb || tb.Rows.Count == 0)
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{
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return list;
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}
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foreach (DataRow row in tb.Rows)
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{
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list.Add(Map<DataRow, TDest>(row, tb.Columns));
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}
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return list;
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}
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/// <summary>
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/// 将DataTable的行转换成TDest类型的泛型List对象
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/// </summary>
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/// <typeparam name="TSource">约束DataTabe的行类型</typeparam>
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/// <typeparam name="TDest">目标实体类对象T类型</typeparam>
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/// <param name="row">DataTabe的行对象</param>
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/// <param name="columns">DataTabe的所有列数据</param>
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/// <returns>TDest目标泛型List对象</returns>
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public static TDest Map<TSource, TDest>(DataRow row, DataColumnCollection columns)
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where TSource : DataRow
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where TDest : class, new()
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{
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//定义TDest目标返回对象
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TDest oTarget = new TDest();
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//获取TDest的反射类型以及其公共属性
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Type typeTDest = typeof(TDest);
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PropertyInfo[] propersTDest = typeTDest.GetProperties();
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#region 遍历转换
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foreach (PropertyInfo pTDest in propersTDest)
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{
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foreach (DataColumn cl in columns)
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{
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//如果DataTable的列名, TDest的属性名称相同，则可进行转换
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if (pTDest.Name.Equals(cl.ColumnName))
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{
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//获取TSource对象该属性的值
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object objValue = row[cl.ColumnName];
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if (null != objValue)
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{
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if (!pTDest.PropertyType.IsGenericType)
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{
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//已知类型
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try
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{
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pTDest.SetValue(oTarget, Convert.ChangeType(objValue, pTDest.PropertyType), null);
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}
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catch
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{
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continue;
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}
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}
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else
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{
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//泛型Nullable<>,未知类型
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Type genericTypeDefinition = pTDest.PropertyType.GetGenericTypeDefinition();
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if (genericTypeDefinition == typeof(Nullable<>))
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{
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pTDest.SetValue(oTarget, Convert.ChangeType(objValue, Nullable.GetUnderlyingType(pTDest.PropertyType)), null);
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}
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}
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}
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break;
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}
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}
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}
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#endregion
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return oTarget;
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}
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/// <summary>
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/// 将T类型的List列表转换为DataTable
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/// </summary>
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/// <typeparam name="T">T类型</typeparam>
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/// <param name="list">列表</param>
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/// <param name="properties">想要转换的属性名称列表[key值对应Model属性,value值对应Excel显示的列名]</param>
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/// <returns>返回DataTable</returns>
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public static DataTable ConvertListToTable<T>(List<T> list, Dictionary<string, string> properties)
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where T : class
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{
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DataTable dt = new DataTable();
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if (properties.Count > 0 && list.Count > 0)
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{
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Type type = typeof(T);
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foreach (KeyValuePair<string, string> property in properties)
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{
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dt.Columns.Add(new DataColumn(property.Value));
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}
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foreach (T t in list)
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{
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DataRow dr = dt.NewRow();
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int i = 0;
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foreach (KeyValuePair<string, string> property in properties)
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{
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PropertyInfo pi = type.GetProperty(property.Key);
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object obj = pi.GetValue(t, null);
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dr[i] = obj == null ? "" : obj.ToString();
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i++;
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}
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dt.Rows.Add(dr);
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}
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}
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return dt;
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}
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/// <summary>
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/// 将T类型的Dictionary字典列表转换为DataTable
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/// </summary>
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/// <typeparam name="D">D类型</typeparam>
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/// <typeparam name="S">S类型</typeparam>
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/// <param name="dic">字典列表</param>
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/// <param name="list">列名列表</param>
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/// <returns>返回DataTable</returns>
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public static DataTable ConvertDictionaryToTable<D, S>(Dictionary<D, S> dic, List<string> list)
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{
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DataTable dt = new DataTable();
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if (dic.Count > 0 && list.Count > 0)
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{
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foreach (string columnName in list)
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{
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dt.Columns.Add(new DataColumn(columnName));
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}
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foreach (KeyValuePair<D, S> d in dic)
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{
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DataRow dr = dt.NewRow();
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dr[0] = d.Key.ToString();
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dr[1] = d.Value.ToString();
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dt.Rows.Add(dr);
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}
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}
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return dt;
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}
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/// <summary>
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/// 将T类型的List列表转换为DataTable
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/// </summary>
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/// <typeparam name="T">T类型</typeparam>
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/// <param name="list">列表</param>
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/// <returns>返回DataTable</returns>
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public static DataTable ConvertListToTable<T>(List<T> list)
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where T : class
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{
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DataTable dt = new DataTable();
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Type type = typeof(T);
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PropertyInfo[] propers = type.GetProperties();
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foreach (PropertyInfo p in propers)
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{
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dt.Columns.Add(new DataColumn(p.Name));
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}
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foreach (T t in list)
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{
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DataRow dr = dt.NewRow();
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for (int i = 0; i < propers.Length; i++)
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{
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PropertyInfo pi = type.GetProperty(propers[i].Name);
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object obj = pi.GetValue(t, null);
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dr[i] = obj == null ? "" : obj.ToString();
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}
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dt.Rows.Add(dr);
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}
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return dt;
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}
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}
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}
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