在開(kāi)發(fā)中可能會(huì)遇到這幾種情況：
1、EF或LINQ查詢出來(lái)的匿名對(duì)象在其它地方調(diào)用不方便，又懶的手動(dòng)建實(shí)體類(lèi)
2、通過(guò)datatable反射實(shí)體需要先建一個(gè)類(lèi) ，頭痛
3、通過(guò)SQL語(yǔ)句返回的實(shí)體也需要先建一個(gè)類(lèi) ，頭痛
4、如果通過(guò)代碼生成器要寫(xiě)模版，需要安裝或者不想生成一堆不用的類(lèi)
為了解決上面的不便之處，我封裝了一個(gè)實(shí)體生成類(lèi)，可以扔到程序里面任意調(diào)用
封裝類(lèi)：
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：實(shí)體生成類(lèi)
/// ** 創(chuàng)始時(shí)間：2015-4-17
/// ** 修改時(shí)間：-
/// ** 作者：sunkaixuan
/// ** qq：610262374 歡迎交流,共同提高 ,命名語(yǔ)法等寫(xiě)的不好的地方歡迎大家的給出寶貴建議
/// /summary>
public class ClassGenerating
{
/// summary>
/// 根據(jù)匿名類(lèi)獲取實(shí)體類(lèi)的字符串
/// /summary>
/// param name="entity">匿名對(duì)象/param>
/// param name="className">生成的類(lèi)名/param>
/// returns>/returns>
public static string DynamicToClass(object entity, string className)
{
StringBuilder reval = new StringBuilder();
StringBuilder propertiesValue = new StringBuilder();
var propertiesObj = entity.GetType().GetProperties();
string replaceGuid = Guid.NewGuid().ToString();
string nullable = string.Empty;
foreach (var r in propertiesObj)
{
var type = r.PropertyType;
if (type.IsGenericType type.GetGenericTypeDefinition() == typeof(Nullable>))
{
type = type.GetGenericArguments()[0];
nullable = "?";
}
if (!type.Namespace.Contains("System.Collections.Generic"))
{
propertiesValue.AppendLine();
string typeName = ChangeType(type);
propertiesValue.AppendFormat("public {0}{3} {1} {2}", typeName, r.Name, "{get;set;}", nullable);
propertiesValue.AppendLine();
}
}
reval.AppendFormat(@"
public class {0}{{
{1}
}}
", className, propertiesValue);
return reval.ToString();
}
/// summary>
/// 根據(jù)DataTable獲取實(shí)體類(lèi)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();
string typeName = ChangeType(r.DataType);
propertiesValue.AppendFormat("public {0} {1} {2}", typeName, r.ColumnName, "{get;set;}");
propertiesValue.AppendLine();
}
reval.AppendFormat(@"
public class {0}{{
{1}
}}
", className, propertiesValue);
return reval.ToString();
}
/// summary>
/// 根據(jù)SQL語(yǔ)句獲取實(shí)體類(lèi)的字符串
/// /summary>
/// param name="sql">SQL語(yǔ)句/param>
/// param name="className">生成的類(lèi)名/param>
/// param name="server">服務(wù)名/param>
/// param name="database">數(shù)據(jù)庫(kù)名稱(chēng)/param>
/// param name="uid">賬號(hào)/param>
/// param name="pwd">密碼/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>
/// 根據(jù)SQL語(yǔ)句獲取實(shí)體類(lèi)的字符串
/// /summary>
/// param name="sql">SQL語(yǔ)句/param>
/// param name="className">生成的類(lèi)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;
}
}
/// summary>
/// 匹配類(lèi)型
/// /summary>
/// param name="type">/param>
/// returns>/returns>
private static string ChangeType(Type type)
{
string typeName = type.Name;
switch (typeName)
{
case "Int32": typeName = "int"; break;
case "String": typeName = "string"; break;
}
return typeName;
}
}
}
調(diào)用如下：
//通過(guò)匿名對(duì)象生成實(shí)體類(lèi)
var dynamicObj = new { id = 1, name = "小名", entity = new enityt1() };
//注意：只能是單個(gè)實(shí)體不能傳入 ListT> ,集合需要 List[0]
string classCode = ClassGenerating.DynamicToClass(dynamicObj, "classDynamic");
//通過(guò)datatable生成實(shí)體類(lèi)
DataTable dt = new DataTable();
dt.Columns.Add("Id", typeof(int));
dt.Columns.Add("Name");
classCode = ClassGenerating.DataTableToClass(dt, "classTatabale");
//通過(guò)sql語(yǔ)句生成實(shí)體類(lèi)
classCode = ClassGenerating.SqlToClass("select * from note", "Note", "127.0.0.1", "MyWork", "sa", "sasa");
classCode = ClassGenerating.SqlToClass("select * from dbo.AccessoriesDetail", "AccessoriesDetail", "NFDEntities");//通過(guò) config connstring名稱(chēng)
然后在調(diào)試狀態(tài)把你需要的結(jié)果CTRL+C 然后去新建一個(gè)類(lèi)CTRL+V
標(biāo)簽：賀州 廣元 固原 淮北 咸寧 吉林 池州 樂(lè)山
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