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DataTableExpressionHelper.cs
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46 lines (44 loc) · 2.52 KB
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/*
* 作用：DataTable 与实体数据列表相互转换，是对 DataTableHelper 的扩展，参数使用表达式，目的是减少属性名的拼写错误。
* */
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq.Expressions;
namespace Helper.Core.Library
{
public class DataTableExpressionHelper
{
#region 对外公开方法
/// <summary>
/// 返回 DataTable 数据
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="dataList">实体类型数据列表</param>
/// <param name="propertyMatchExpression">属性匹配，例：p=> new { ID = p.UserID }</param>
/// <param name="propertyExpression">属性列表，如果指定，则按指定属性列表 DataTable 数据，例：p=> new { p.UserID }</param>
/// <param name="propertyContain">是否包含，true 属性包含，flase 属性排除</param>
/// <param name="reflectionType">反射类型</param>
/// <returns></returns>
public static DataTable ToDataTable<T>(List<T> dataList, Expression<Func<T, object>> propertyMatchExpression, Expression<Func<T, object>> propertyExpression = null, bool propertyContain = true, ReflectionTypeEnum reflectionType = ReflectionTypeEnum.Expression) where T : class
{
Dictionary<string, object> propertyDict = CommonHelper.GetExpressionDict<T>(propertyMatchExpression);
List<string> propertyNameList = CommonHelper.GetExpressionList<T>(propertyExpression);
return DataTableHelper.ExecuteToDataTable<T>(dataList, propertyDict, propertyNameList, propertyContain, reflectionType);
}
/// <summary>
/// 返回实体类型数据列表
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="dataTable">DataTable 数据</param>
/// <param name="propertyMatchExpression">属性匹配，例：p=> new { ID = p.UserID }</param>
/// <param name="reflectionType">反射类型</param>
/// <returns></returns>
public static List<T> ToEntityList<T>(DataTable dataTable, Expression<Func<T, object>> propertyMatchExpression, ReflectionTypeEnum reflectionType = ReflectionTypeEnum.Expression) where T : class, new()
{
Dictionary<string, object> propertyDict = CommonHelper.GetExpressionDict<T>(propertyMatchExpression);
return DataTableHelper.ExecuteToEntityList<T>(dataTable, propertyDict, reflectionType);
}
#endregion
}
}