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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namespace YX.BLL
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{
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public class ListToDataTable
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{
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public static DataTable ListModelToDataTable<T>(List<T> entitys)
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{
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//检查实体集合不能为空
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if (entitys == null || entitys.Count < 1)
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{
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return new DataTable();
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}
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//取出第一个实体的所有Propertie
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Type entityType = entitys[0].GetType();
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PropertyInfo[] entityProperties = entityType.GetProperties();
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//生成DataTable的structure
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//生产代码中，应将生成的DataTable结构Cache起来，此处略
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DataTable dt = new DataTable("dt");
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for (int i = 0; i < entityProperties.Length; i++)
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{
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//dt.Columns.Add(entityProperties[i].Name, entityProperties[i].PropertyType);
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dt.Columns.Add(entityProperties[i].Name);
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}
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//将所有entity添加到DataTable中
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foreach (object entity in entitys)
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{
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//检查所有的的实体都为同一类型
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if (entity.GetType() != entityType)
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{
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throw new Exception("要转换的集合元素类型不一致");
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}
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object[] entityValues = new object[entityProperties.Length];
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for (int i = 0; i < entityProperties.Length; i++)
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{
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entityValues[i] = entityProperties[i].GetValue(entity, null);
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}
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dt.Rows.Add(entityValues);
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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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