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WP8 本地数据库建立两张表出错 这是为什么呢

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悬赏园豆:10 [待解决问题]

我现在想在WP8的本地数据库建立我的两张表,具体代码如下:

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 
  5 using System.Text;
  6 using System.Threading.Tasks;
  7 
  8 //这是我们的表情值的表
  9 using System.ComponentModel;
 10 using System.Data.Linq;
 11 using System.Data.Linq.Mapping;
 12 
 13 namespace MoonPet
 14 {
 15 #region 第一张表
 16 [Table]
 17 public class Moon : INotifyPropertyChanged, INotifyPropertyChanging
 18 {
 19 private int _moonId;
 20 [Column(DbType = "INT IDENTIEY NOT NULL", CanBeNull = false, IsPrimaryKey = true, IsDbGenerated = true, AutoSync = AutoSync.OnInsert)]
 21 public int MoonId
 22 {
 23 get { return _moonId; }
 24 set { if (value != _moonId) { OnPropertyChanging("MoonId"); _moonId = value; OnPropertyChanged("MoonId"); } }
 25 }
 26 private float _moonValue;
 27 [Column]
 28 public float MoonValue
 29 {
 30 get { return _moonValue; }
 31 set { if (value != _moonValue) { OnPropertyChanging("MoonValue"); _moonValue = value; OnPropertyChanged("MoonValue"); } }
 32 }
 33 private int _year;
 34 [Column]
 35 public int Year
 36 {
 37 get { return _year; }
 38 set { if (value != _year) { OnPropertyChanging("Year"); _year = value; OnPropertyChanged("Year"); } }
 39 }
 40 private int _month;
 41 [Column]
 42 public int Month
 43 {
 44 get { return _month; }
 45 set { if (value != _month) { OnPropertyChanging("Month"); _month = value; OnPropertyChanged("Month"); } }
 46 }
 47 private int _day;
 48 [Column]
 49 public int Day
 50 {
 51 get { return _day; }
 52 set { if (value != _day) { OnPropertyChanging("Day"); _day = value; OnPropertyChanged("Day"); } }
 53 }
 54 #region 事件和方法
 55 public event PropertyChangingEventHandler PropertyChanging;
 56 public event PropertyChangedEventHandler PropertyChanged;
 57 protected void OnPropertyChanging(string propertyName)
 58 {
 59 if (PropertyChanging != null)
 60 {
 61 PropertyChanging(this, new PropertyChangingEventArgs(propertyName));
 62 }
 63 }
 64 protected void OnPropertyChanged(string propertyName)
 65 {
 66 if (PropertyChanged != null)
 67 {
 68 PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
 69 }
 70 }
 71 #endregion
 72 }
 73 #endregion
 74 #region 第二张表
 75 [Table]
 76 public class Diarys : INotifyPropertyChanging, INotifyPropertyChanged
 77 {
 78 //定义我的实体数据类
 79 string _Content;
 80 string _CreateTime;
 81 string _Title;
 82 int _Id;
 83 [Column(DbType = "INT IDENTITY NOT NULL", IsPrimaryKey = true, CanBeNull = false, IsDbGenerated = true, AutoSync = AutoSync.OnInsert)]
 84 
 85 public int Id
 86 {
 87 get { return _Id; }
 88 set { if (value != _Id) { OnPropertyChanging("Id"); _Id = value; OnPropertyChanged("Id"); } }
 89 }
 90 [Column]
 91 public string Content
 92 {
 93 get { return _Content; }
 94 set { if (value != _Content) { OnPropertyChanging("Content"); _Content = value; OnPropertyChanged("Content"); } }
 95 }
 96 [Column]
 97 public string CreateTime
 98 {
 99 get
100 {
101 return _CreateTime;
102 }
103 set { if (value != _CreateTime) { OnPropertyChanging("CreateTime"); _CreateTime = value; OnPropertyChanged("CreateTime"); } }
104 }
105 [Column]
106 public string Title
107 {
108 get { return _Title; }
109 set { if (value != _Title) { OnPropertyChanging("Title"); _Title = value; OnPropertyChanged("Title"); } }
110 }
111 //声明两个事件来实现
112 public event PropertyChangingEventHandler PropertyChanging;
113 public event PropertyChangedEventHandler PropertyChanged;
114 //事件对应的方法
115 protected void OnPropertyChanging(string propertyName)
116 {
117 if (PropertyChanging != null)
118 {
119 PropertyChanging(this, new PropertyChangingEventArgs(propertyName));
120 }
121 }
122 protected void OnPropertyChanged(string propertyName)
123 {
124 if (PropertyChanged != null)
125 {
126 PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
127 }
128 }
129 }
130 #endregion
131 #region 用于操作数据库的上下文
132 public class MyContext : DataContext
133 {
134 //连接字符串
135 public const string CONN_STR = "data source='isostore:/db.sdf';password='123456'";
136 //公共构造函数
137 public MyContext() : base(CONN_STR) { }
138 //公共成员
139 public Table<Moon> Moons;
140 public Table<Diarys> Diarys;
141 }
142 #endregion
143 }

但是建立好后使用的时候却出现不存在着两张表的错误,但是我单独建立一张表的时候却又能成功,这是为什么呢?

Vaker丶XH的主页 Vaker丶XH | 初学一级 | 园豆:194
提问于:2014-05-20 08:31
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