如何通过独立存储访问SQLite数据库？

Question

我试着通过IsolatedStorage访问我的新SQLite数据库，但是当我做的：

new SQLiteConnection(_dbpath); 

的数据库中找不到。
这里是我的代码来创建文件：

IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication(); 
if (!isoStore.FileExists("TestDB.sqlite")) 
{ 
    isoStore.CreateFile("TestDB.sqlite"); 
} 
_dbpath = System.IO.Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "SportInDB.sqlite"); 

我错过了什么，同时创造了新的SQLiteConnection？

Answer 1

最简单的例子呢？它创建一个数据库，其表格与class Question匹配。

---

// namespaces 
using SQLite; 
using System.IO; 
using System.IO.IsolatedStorage; 
using System.Threading.Tasks; 

// define a class like table to create 
public class Question 
{ 
    [SQLite.PrimaryKey, SQLite.AutoIncrement] 
    public int Id { get; set; } 
    public int Status { get; set; } 
} 

public partial class MainPage : PhoneApplicationPage 
{ 
    string dbPath = ""; 

    // Constructor 
    public MainPage() 
    { 
     InitializeComponent(); 

     // combine the local folder with the file name of the database 
     dbPath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "db.sqlite");       

     CreateDBTable();    
    } 

    // from the MSDN article for getting SQLite to work 
    private async Task<bool> FileExists(string fileName) 
    { 
     var result = false; 
     try 
     { 
      var store = await Windows.Storage.ApplicationData.Current.LocalFolder.GetFileAsync(fileName); 
      result = true; 
     } 
     catch 
     { 
     } 
     return result; 
    } 

    // if the file doesn't exist, create it with the db.CreateTable 
    public void CreateDBTable() 
    { 
     if (!FileExists("db.sqlite").Result) 
     { 
      using (var db = new SQLiteConnection(dbPath)) 
      { 
       db.CreateTable<Question>(); 
      } 
     } 
    } 
}