标签:mod database net show date single final and 策略
这一节主要关于数据库的操作。
首先在APP.config中添加connectionStrings
<connectionStrings > <add name="CIM.iFA.CIS.Infrastructure.Database.CIS210" providerName="System.Data.SqlClient" connectionString="Server=.\SQLEXPRESS;Initial Catalog=CIS20;Integrated Security=true;MultipleActiveResultSets=True"/> </connectionStrings>
App.xaml.cs代码如下,据说创建数据库有四种方式:
策略一:数据库不存在时重新创建数据库
策略二:每次启动应用程序时创建数据库
策略三:模型更改时重新创建数据库
策略四:从不创建数据库
public partial class App : Application { private Window mMainWin; private void Application_Startup(object sender, StartupEventArgs e) { Database.SetInitializer<CISDbContext>(new DropCreateDatabaseWithSeedData()); using (var context = new CISDbContext()) { context.Database.Initialize(true); } mMainWin = new MainWindow(); this.mMainWin.Show (); } }
CISDbContext.cs代码如下:
1) DbSet 建数据表
2) CISDbContext():base()连接数据库的字符串。
3)OnModelCreating 暂时还没用到。
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data.Entity; using System.Data.Entity.Infrastructure; using System.Data.Entity.Core.Objects; using System.Data.Entity.Core.EntityClient; using SQL.DAL.Model; using SQL.DAL; using SQLtest.Model; namespace CIS.DAL { public class CISDbContext : DbContext, IDbContext { public DbSet<InlineToolModel> t_InlineToolModel { get; set; } public new IDbSet<TEntity> Set<TEntity>() where TEntity : class { return base.Set<TEntity>(); } public CISDbContext(string connstr) : base(connstr) { var objectContext = (this as IObjectContextAdapter).ObjectContext; objectContext.CommandTimeout = 0;// 永不超时,单位秒 } public CISDbContext() :base("name=CIM.iFA.CIS.Infrastructure.Database.CIS210") { var objectContext = (this as IObjectContextAdapter).ObjectContext; objectContext.CommandTimeout = 0;// 永不超时,单位秒 } public ObjectContext ObjectContext { get { return ((this as IObjectContextAdapter).ObjectContext); } } public string ConnectionString { get { return (((EntityConnection)ObjectContext.Connection).StoreConnection.ConnectionString); } } protected override void OnModelCreating(DbModelBuilder modelBuilder) { } } }
IDbContext.cs相关接口
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data.Entity; namespace SQL.DAL { public interface IDbContext { IDbSet<TEntity> Set<TEntity>() where TEntity : class; int SaveChanges(); void Dispose(); } }
DropCreateDatabaseWithSeedData.cs,在数据库新建时,初始化数据。
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data.Entity; using SQL.DAL.Repository; using SQL.DAL.Model; using SQL.DAL; using CIS.DAL; using SQLtest.Model; namespace SQL.DAL { public class DropCreateDatabaseWithSeedData : DropCreateDatabaseIfModelChanges<CISDbContext> { protected override void Seed(CISDbContext context) { #region t_User内置 Repository<InlineToolModel> oRepUser = new Repository<InlineToolModel>(context); oRepUser.Add(new InlineToolModel() {Name="AECVD"}); #endregion context.SaveChanges(); base.Seed(context); } } }
Repository.cs
using System; using System.Collections.Generic; using System.Linq; using System.Text; using SQL.DAL.Model; using System.Data.Entity; namespace SQL.DAL.Repository { public class Repository<TEntity> : IRepository<TEntity> where TEntity : class, IEntity { private IDbContext _context; public IDbContext Context { get { return _context; } set { _context = value; } } public Repository(IDbContext context) { _context = context; } private IDbSet<TEntity> DbSet { get { return _context.Set<TEntity>(); } } public TEntity FindById(int Id) { return DbSet.SingleOrDefault(d => d.Id == Id); } public IQueryable<TEntity> GetAll() { return DbSet.AsQueryable(); } public void Delete(TEntity entity) { DbSet.Remove(entity); } public void Delete(IQueryable<TEntity> entities) { foreach (TEntity entity in entities) { DbSet.Remove(entity); } } public void Add(TEntity entity) { DbSet.Add(entity); } public void Add(IQueryable<TEntity> entities) { foreach (TEntity entity in entities) { DbSet.Add(entity); } } public void Add(IEnumerable<TEntity> entities) { foreach (TEntity entity in entities) { DbSet.Add(entity); } } public TEntity Update(TEntity pEntity) { if (((DbContext)_context).Entry<TEntity>(pEntity).State == EntityState.Modified) _context.SaveChanges(); return pEntity; } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool disposing) { if (disposing) { if (_context != null) { _context.Dispose(); _context = null; } } } } }
IRepository.cs相关接口
using System; using System.Collections.Generic; using System.Linq; using System.Text; using SQL.DAL.Model; namespace SQL.DAL.Repository { public interface IRepository<TEntity> : IDisposable where TEntity : IEntity { IQueryable<TEntity> GetAll(); void Delete(TEntity entity); void Add(TEntity entity); } }
IEntity.cs相关接口
using System; namespace SQL.DAL.Model { public interface IEntity { int Id { get; set; } } }
标签:mod database net show date single final and 策略
原文地址:http://www.cnblogs.com/hellcats/p/6001124.html