c#EntityFrameworkcodeFirst模式

一、首先定义数据类

[DataContract(Namespace="http://www.cninnovation.com/Services/2012")]
public class RoomReservation : INotifyPropertyChanged
{
private int id;
[DataMember]
public int Id
{
get { return id; }
set { SetProperty(ref id, value); }
}

private string roomName;
[DataMember]
[StringLength(30)]
public string RoomName
{
get { return roomName; }
set { SetProperty(ref roomName, value); }
}

private DateTime startTime;
[DataMember]
public DateTime StartTime
{
get { return startTime; }
set { SetProperty(ref startTime, value); }
}

private DateTime endTime;
[DataMember]
public DateTime EndTime
{
get { return endTime; }
set { SetProperty(ref endTime, value); }
}

private string contact;
[DataMember]
[StringLength(30)]
public string Contact
{
get { return contact; }
set { SetProperty(ref contact, value); }
}

private string text;
[DataMember]
[StringLength(50)]
public string Text
{
get { return text; }
set { SetProperty(ref text, value); }
}

protected virtual void OnNotifyPropertyChanged(string propertyName)
{
PropertyChangedEventHandler eventHandler = PropertyChanged;
if (eventHandler != null)
{
eventHandler(this, new PropertyChangedEventArgs(propertyName));
}
}

protected virtual void SetProperty<T>(ref T item, T value, [CallerMemberName] string propertyName = null)
{
if (!EqualityComparer<T>.Default.Equals(item, value))
{
item = value;
OnNotifyPropertyChanged(propertyName);
}
}

public event PropertyChangedEventHandler PropertyChanged;
}

二、定义继承DbContext类

public class RoomReservationContext : DbContext
{

public RoomReservationContext()
: base("name=RoomReservation")
{

}
public DbSet<RoomReservation> RoomReservations { get; set; }
}

三、编译项目

编译后会生成对应dbf数据库文件

怎么通过visualstudio打开呢？

1.



2.天假连接数据库



3.添加成功后



数据库物理位置C:\Users\Administrator\RoomReservation.mdf