Windows Phone 学习 创建和使用数据库

using (MyDataContex dc = new MyDataContex())
{
if (dc.DatabaseExists() == false)
{
dc.CreateDatabase();
System.Diagnostics.Debug.WriteLine(DateTime.Now.ToLongTimeString() + " 数据库创建完成。");
}
else
{
System.Diagnostics.Debug.WriteLine(DateTime.Now.ToLongTimeString() + " 数据库已经存在。");
}
}

public class TestEntity : INotifyPropertyChanging, INotifyPropertyChanged
{
private string _cityName;

/// <summary>
/// 公共属性，对应于表中的列
/// </summary>
[Column]
public string CityName
{
get
{
return this._cityName;
}
set
{
if (this._cityName != value)
{
OnPropertyChanging("CityName");
this._cityName = value;
OnPropertyChanged("CityName");
}
}
}

public event PropertyChangingEventHandler PropertyChanging;
// 引发PropertyChanging事件
protected void OnPropertyChanging(string propertyName)
{
if (PropertyChanging != null)
{
PropertyChanging(this, new PropertyChangingEventArgs(propertyName));
}
}

public event PropertyChangedEventHandler PropertyChanged;
// 引发PropertyChanged事件
protected void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}

/// <summary>
/// 从DataContext派生的类
/// </summary>
public class MyDataContex:DataContext
{
/// <summary>
/// 连接字符串
/// </summary>
public const string CONNECT_STRING = "Data Source='isostore:/db.sdf';Password='123456'";

/// <summary>
/// 构造函数
/// </summary>
public MyDataContex()
: base(CONNECT_STRING)
{

}

/// <summary>
/// 公共属性，对应于数据库中的表
/// </summary>
public Table<TestEntity> MyTestEntity;
}