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
2、通過(guò)datatable反射實(shí)體需要先建一個(gè)類 ，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 ，頭痛
4、如果通過(guò)代碼生成器要寫模版，需要安裝或者不想生成一堆不用的類
為了解決上面的不便之處，我封裝了一個(gè)實(shí)體生成類，可以扔到程序里面任意調(diào)用
封裝類：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
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 /// ** 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)匿名類獲取實(shí)體類的字符串 /// </summary> /// <param name="entity">匿名對(duì)象</param> /// <param name="className">生成的類名</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)體類的字符串 /// </summary> /// <param name="sql">SQL語(yǔ)句</param> /// <param name="className">生成的類名</param> /// <param name="server">服務(wù)名</param> /// <param name="database">數(shù)據(jù)庫(kù)名稱</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)體類的字符串 /// </summary> /// <param name="sql">SQL語(yǔ)句</param> /// <param name="className">生成的類名</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：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
//通過(guò)匿名對(duì)象生成實(shí)體類 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 List<T> ,集合需要 List[0] string classCode = ClassGenerating.DynamicToClass(dynamicObj, "classDynamic"); //通過(guò)datatable生成實(shí)體類 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 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 |
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CTRL+V
