在开发中可能会遇到这几种情况1、EF或LINQ查询出来的匿名对象在其它地方调用不方便,又懒的手动建实体类2、通过datatable反射实体需要先建一个类 ,头痛3、通过SQL语句返回的实体也需要先建一个类 ,头痛4、如果通过代码生成器要写模版,需要安装或者不想生成一堆不用的类 ...
在开发中可能会遇到这几种情况
1、EF或LINQ查询出来的匿名对象在其它地方调用不方便,又懒的手动建实体类
2、通过datatable反射实体需要先建一个类 ,头痛
3、通过SQL语句返回的实体也需要先建一个类 ,头痛
4、如果通过代码生成器要写模版,需要安装或者不想生成一堆不用的类
为了解决上面的不便之处,我封装了一个实体生成类,可以扔到程序里面任意调用
封装类:
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Data;using System.Data.SqlClient;using System.Text.RegularExpressions;namespace SyntacticSugar{ /// <summary> /// ** 描述:实体生成类 /// ** 创始时间:2015-4-17 /// ** 修改时间:- /// ** 作者:sunkaixuan /// ** qq:610262374 欢迎交流,共同提高 ,命名语法等写的不好的地方欢迎大家的给出宝贵建议 /// </summary> public class ClassGenerating { /// <summary> /// 根据匿名类获取实体类的字符串 /// </summary> /// <param name="entity">匿名对象</param> /// <param name="className">生成的类名</param> /// <returns></returns> public static get='_blank'>string DynamicToClass(object entity, string className) { StringBuilder reval = new StringBuilder(); StringBuilder propertiesValue = new StringBuilder(); var propertiesObj = entity.GetType().GetProperties(); string replaceGuid = Guid.NewGuid().ToString(); foreach (var r in propertiesObj) { propertiesValue.AppendLine(); propertiesValue.AppendFormat("public {0} {1} {2}", r.PropertyType.FullName, r.Name, "{get;set;}"); propertiesValue.AppendLine(); } reval.AppendFormat(@" public class {0}{{ {1} }} ", className, propertiesValue); return reval.ToString(); } /// <summary> /// 根据DataTable获取实体类的字符串 /// </summary> /// <param name="sql"></param> /// <param name="className"></param> /// <returns></returns> public static string DataTableToClass(DataTable dt, string className) { StringBuilder reval = new StringBuilder(); StringBuilder propertiesValue = new StringBuilder(); string replaceGuid = Guid.NewGuid().ToString(); foreach (DataColumn r in dt.Columns) { propertiesValue.AppendLine(); propertiesValue.AppendFormat("public {0} {1} {2}", r.DataType, r.ColumnName, "{get;set;}"); propertiesValue.AppendLine(); } reval.AppendFormat(@" public class {0}{{ {1} }} ", className, propertiesValue); return reval.ToString(); } /// <summary> /// 根据SQL语句获取实体类的字符串 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="className">生成的类名</param> /// <param name="server">服务名</param> /// <param name="database">数据库名称</param> /// <param name="uid">账号</param> /// <param name="pwd">密码</param> /// <returns></returns> public static string SqlToClass(string sql, string className, string server, string database, string uid, string pwd) { using (SqlConnection conn = new SqlConnection(string.Format("server={0};uid={2};pwd={3};database={1}", server, database, uid, pwd))) { SqlCommand command = new SqlCommand(); command.Connection = conn; command.CommandText = sql; DataTable dt = new DataTable(); SqlDataAdapter sad = new SqlDataAdapter(command); sad.Fill(dt); var reval = DataTableToClass(dt, className); return reval; } } /// <summary> /// 根据SQL语句获取实体类的字符串 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="className">生成的类名</param> /// <param name="connName">webconfig的connectionStrings name</param> /// <returns></returns> public static string SqlToClass(string sql, string className, string connName) { string connstr = System.Configuration.ConfigurationManager.ConnectionStrings[connName].ToString(); if (connstr.Contains("metadata"))//ef connstr = Regex.Match(connstr, @"connection string\=""(.+)""").Groups[1].Value; using (SqlConnection conn = new SqlConnection(connstr)) { SqlCommand command = new SqlCommand(); command.Connection = conn; command.CommandText = sql; DataTable dt = new DataTable(); SqlDataAdapter sad = new SqlDataAdapter(command); sad.Fill(dt); var reval = DataTableToClass(dt, className); return reval; } } }}
原标题:.net 根据匿名类生成实体类,根据datatable生成实体类,根据sql生成实体类
关键词:.NET
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