windows phone用物品創建數據庫

Question

我正在爲windows phone構建一個簡單的應用程序。我想創建一個數據庫，並希望在數據庫中有幾個（可以說10個）項目。我是一個初學者，我看過的每一個教程都是關於在數據庫中添加項目按鈕「添加」或這樣的東西。我不需要這樣做，因爲我想讓數據庫中有多個項目，以供用戶使用。我怎樣才能做到這一點？請以清楚的方式給我寫信，因爲我仍然是初學者。如果您可以提供一些示例或教程的鏈接，那就太好了。謝謝你！

Answer 1

如果您需要預加載的數據庫，那麼您可以在您的應用程序中添加一個sqlCe數據庫，並使用您的種子數據填充數據庫。 然後您可以在調用DBContext的構造函數時將DB文件複製到ISO存儲區。

public Moviadb1DataContext (string connectionString) : base(connectionString) 
    { 
     IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication(); 

     if (!iso.FileExists("Moviadb1.sdf")) 
     { 
      MoveReferenceDatabase(); 
     } 

     if (!DatabaseExists()) 
      CreateDatabase(); 
    } 

    public static void MoveReferenceDatabase() 
    { 
     // Obtain the virtual store for the application. 
     IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication(); 

     // Create a stream for the file in the installation folder. 
     using (Stream input = Application.GetResourceStream(new Uri("Moviadb1.sdf", UriKind.Relative)).Stream) 
     { 
      // Create a stream for the new file in isolated storage. 

      using (IsolatedStorageFileStream output = iso.CreateFile("Moviadb1.sdf")) 
      { 
       // Initialize the buffer. 
       byte[] readBuffer = new byte[4096]; 
       int bytesRead = -1; 

       // Copy the file from the installation folder to isolated storage. 
       while ((bytesRead = input.Read(readBuffer, 0, readBuffer.Length)) > 0) 
       { 
        output.Write(readBuffer, 0, bytesRead); 
       } 
      } 
     } 
    } 

如果您的數據量非常少，您還可以添加一些種子數據，而不是移動參考數據庫。

public ListenDataDataContext (string connectionString) : base(connectionString) 
    { 
     if (!DatabaseExists()) 
     { 
      CreateDatabase(); 
      List<Audiables> PreLoads = new List<Audiables>(); 
      PreLoads.Add(new Audiables { Category = 1, Name = "I want To Eat", AudioLocation = "Sounds/Food/1_IwantToEat.wma", ImageLocation = "Images/Food/1_IwantToEat.jpg" }); 
      PreLoads.Add(new Audiables { Category = 1, Name = "I want To Drink", AudioLocation = "Sounds/Food/1_IwantToDrink.wma", ImageLocation = "Images/Food/1_IwantToDrink.jpg" }); 

      PreLoads.Add(new Audiables { Category = 2, Name = "I want A Ticket", AudioLocation = "Sounds/Travel/1_IwantATicket.wma", ImageLocation = "Images/Travel/1_IwantATicket.jpg" }); 
      PreLoads.Add(new Audiables { Category = 2, Name = "I want To Sit", AudioLocation = "Sounds/Travel/1_IwantToSit.wma", ImageLocation = "Images/Travel/1_IwantToSit.jpg" }); 

      PreLoads.Add(new Audiables { Category = 3, Name = "How Much Is That", AudioLocation = "Sounds/Shopping/1_HowMuchIsThat.wma", ImageLocation = "Images/Shopping/1_HowMuchIsThat.jpg" }); 
      PreLoads.Add(new Audiables { Category = 3, Name = "Please Take the Money", AudioLocation = "Sounds/Shopping/1_PleaseTakeTheMoney.wma", ImageLocation = "Images/Shopping/1_PleaseTakeTheMoney.jpg" }); 
      Audiables.InsertAllOnSubmit(PreLoads); 
      this.SubmitChanges(); 
     } 
    } 

快樂的應用使得:)

Answer 2

最好的方法是檢查Windows Phone Code Samples中的「Local Database Sample」！