总体结构如图:
1. 使用NuGet添加EF6
2. 添加实体Model
- public class User_Model {
- public int ID { get; set; }
- public string S_UserID { get; set; }
- public int Sex { get; set; }
- public string Phone { get; set; }
- public int Age { get; set; }
- public DateTime? AddDateTime { get; set; }
- public DateTime? UpdDateTime { get; set; }
- }
3. 创建Map(Model成员约束)
- public class User_Map : EntityTypeConfiguration<Model.User_Model> {
- public User_Map() {
- ToTable("3660_kangwl.Users");//自定义表名
- this.HasKey(u => u.ID);//主键
- this.Property(u => u.ID).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);//自增张字段
- this.Property(u => u.AddDateTime).HasColumnName("Add_DateTime").IsRequired();
- this.Property(u => u.S_UserID).HasColumnName("S_User_ID");
- this.Property(u => u.UpdDateTime).HasColumnName("Update_DateTime").IsOptional();
- }
- }
4. 创建数据库上下文 Context
- public class Smile : DbContext {
- public Smile() :base() {
- Database.Connection.ConnectionString =
- System.Configuration.ConfigurationManager.ConnectionStrings["smile"].ConnectionString;
- Database.SetInitializer(new NullDatabaseInitializer<Smile>());
- }
- public DbSet<Model.User_Model> User { get; set; }
- protected override void OnModelCreating(DbModelBuilder modelBuilder) {
- modelBuilder.Configurations.Add(new User_Map());
- base.OnModelCreating(modelBuilder);
- }
- }
5. 操作代码
- class Program
- {
- private static void Main(string[] args) {
- Smile smile = new Smile();
- var users = smile.User;
- foreach (User_Model user in users) {
- Console.WriteLine(user.S_UserID);
- }
- //由于加了实体与数据库字段映射
- //下面的sql查询用了as转换成映射字段,否则取不出来的
- //切记,切记
- //Add_DateTime(数据库字段),AddDateTime(映射字段)
- var rawSqlUsers =
- smile.Database.SqlQuery<Model.User_Model>(
- "select id,s_user_id as S_UserID,Sex,Phone,Age,Add_DateTime as AddDateTime,update_datetime as UpdDateTime from users");
- foreach (User_Model user in rawSqlUsers) {
- Console.WriteLine(user.ID);
- }
- //command指令如下
- //参数id=@p0
- int ret = smile.Database.ExecuteSqlCommand("update users set age=-1 where id=@p0", 2);
- Console.WriteLine(ret > 0);
- //两个参数
- int ret1 = smile.Database.ExecuteSqlCommand("update users set age=-1 where id=@p0 and s_user_id=@p1", 12,"kangwl");
- Console.WriteLine(ret > 0);
- var auser =
- smile.Database.SqlQuery<Model.User_Model>(
- "select id,s_user_id as S_UserID,Sex,Phone,Age,Add_DateTime as AddDateTime,update_datetime as UpdDateTime from users where id=@p0",
- 12);
- Console.WriteLine(auser.First().Age);
- Console.Read();
- }
- }
6. show 一下配置文件
- <?xml version="1.0" encoding="utf-8"?>
- <configuration>
- <configSections>
- <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
- <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
- </configSections>
- <connectionStrings>
- <add name="smile" connectionString="server=smile.xxx.xxx;database=3660_smile;uid=3660_kangwl;pwd=xxxxx;" providerName="System.Data.SqlClient"/>
- </connectionStrings>
- <entityFramework>
- <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
- <parameters>
- <parameter value="v11.0" />
- </parameters>
- </defaultConnectionFactory>
- <providers>
- <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
- </providers>
- </entityFramework>
- </configuration>