Windows Phone从7.1开始支持本地数据库，是SQL CE，但是不支持直接使用SQL语句操作，需要用到Linq.因为网上例子比较少，而且都使用MVVM模式，对于我这个学C#没几天的人来说，太复杂了。折腾了一天，总算是搞定，上范例截图： 
稍微解说一下，首先需要添加引用System.Data.Linq，再针对你的表定义一个类.我的表名为train,有三个字段，分别为id,train_no,favorite,定义如下：
[Table]
public class train : INotifyPropertyChanged, INotifyPropertyChanging
{
//类名与表名相同
//给表定义一个类，包括所有的字段
private int id;
//字段名
[Column(IsPrimaryKey = true, CanBeNull = false, IsDbGenerated = true, DbType = "INT NOT NULL Identity", AutoSync = AutoSync.OnInsert)]
//主键，不为空，自动生成，int型不为空，仅在插入时返回值
public int ID
{
get
{
return id;
}
set
{
if (id != value)
{
//修改发送通知
NotifyPropertyChanging("ID");
id = value;
NotifyPropertyChanged("ID");
}
}
}
private string train_no;
[Column]
public string Train_no
{
get
{
return train_no;
}
set
{
NotifyPropertyChanging("Train_no");
train_no = value;
NotifyPropertyChanged("Train_no");
}
}
private int favorite;
[Column (DbType = "INT NOT NULL")]
public int Favorite
{
get
{
return favorite;
}
set
{
NotifyPropertyChanging("Favorite");
favorite = value;
NotifyPropertyChanged("Favorite");
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
//通知修改
public event PropertyChangingEventHandler PropertyChanging;
private void NotifyPropertyChanging(string propertyName)
{
if (PropertyChanging != null)
{
PropertyChanging(this, new PropertyChangingEventArgs(propertyName));
}
}
public override string ToString()
{
return this.ID.ToString() + "," + this.Train_no + " ," + this.Favorite ;
}
}
再定义一个继承自 DataContext的DBContext类用于操作数据库：
public class DBContext : DataContext
{
private const string DBPath = "Data Source=isostore:/db.sdf";
//定义数据库路径
public Table Train;
//定义train表
public DBContext(): base(DBPath)
{
//直接调用父类的构造方法
}
}
下面就是程序中的增删改查了：
namespace LocalDB
{
public partial class MainPage : PhoneApplicationPage
{
// Constructor
DBContext db;
public ObservableCollection Items { get; private set; }
public MainPage()
{
InitializeComponent();
}
private void LayoutRoot_Loaded(object sender, RoutedEventArgs e)
{
//页面载入时初始化
db = new DBContext();
if (!db.DatabaseExists())
db.CreateDatabase();
//数据库不存在就创建数据库
}
private void button1_Click(object sender, RoutedEventArgs e)
{
//增
train t = new train();
t.Train_no = "aaasf";
t.Favorite = 1;
db.Train.InsertOnSubmit(t);
db.SubmitChanges();
//提交修改
}
private void button2_Click(object sender, RoutedEventArgs e)
{
//查
var rows = from z in db.Train where z.ID>0&&z.ID<20 select z;
//相当于select * from train，限定条件参考删、改
textBlock1.Text = "";
foreach (train t in rows)
{
textBlock1.Text += t.Train_no + "\n";
}
}
private void button3_Click(object sender, RoutedEventArgs e)
{
//改
var rows = from z in db.Train where z.Train_no == "aaasf" select z;
//相当于select * from train where train_no="aaasf";
//选出对象，再修改，没有update方法
foreach (train mt in rows)
{
mt.Favorite = 1;
mt.Train_no = "fsa";
}
db.SubmitChanges();
}
private void button4_Click(object sender, RoutedEventArgs e)
{
//删
var rows = from z in db.Train where z.Train_no == "fsa" select z;
//相当于select * from train where train_no="fsa"
//先选出对象，再删除没有直接的delect方法
foreach (train mt in rows)
{
db.Train.DeleteOnSubmit(mt);
}
db.SubmitChanges();
}
}
}
最后附上打包的源代码： [download id=”29”]