當開發者準備好一個預設數據庫文件後,就能夠將這個數據庫文件添加到建立的項目中了。本節將分別在Xamarin.iOS和Xamarin.Android項目中使用預設數據庫。sql
在Xamarin.iOS項目中使用預設數據庫的具體操做步驟以下:數據庫
(1)建立一個Xamarin.iOS項目,如iOSSQLiteDemo。ide
(2)將上一節中建立的Documents.db數據庫拖動iOSSQLiteDemo項目的Resources文件夾中。spa
(3)打開ViewController.cs文件,將Documents.db數據庫複製到或移動到Documents目錄下,代碼以下:code
using Foundation; using System; using System.IO; using UIKit; namespace iOSSQLiteDemo { public partial class ViewController : UIViewController { public ViewController (IntPtr handle) : base (handle) { } public override void ViewDidLoad () { base.ViewDidLoad (); // Perform any additional setup after loading the view, typically from a nib. var projectBundle = NSBundle.MainBundle; var resourcePath = projectBundle.PathForResource("Documents", "db"); var dirManager = NSFileManager.DefaultManager; string sqlitePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), "MyDocuments.db"); Console.WriteLine("數據庫文件目錄:{0}", sqlitePath); NSError er = new NSError(); dirManager.Copy(resourcePath, sqlitePath, out er); //複製 } public override void DidReceiveMemoryWarning () { base.DidReceiveMemoryWarning (); // Release any cached data, images, etc that aren't in use. } } }
運行程序後,會在輸出窗口輸出如下的內容:orm
數據庫文件目錄:/Users/mac/Library/Developer/CoreSimulator/Devices/77752D53-9F0F-400C-89BD-A88D1EFD910C/data/Containers/Data/Application/DBD889F8-BB9A-423A-A729-E659A794B18B/Documents/MyDocuments.dbsqlite