windows phone 8.1开发SQlite数据库操作详解

2022-09-27 15:41:40

原文出自：http://www.bcmeng.com/windows-phone-sqlite1/

本文小梦将和大家分享WP8.1中SQlite数据库的基本操作:(最后有整个示例的源码)(希望能通过本站广告支持小梦,谢谢!)

建立数据库
增加数据
删除数据
更改数据
查询数据

(注:为了让每个操作都能及时显示在UI上,所以进行了数据绑定.数据绑定会在后面文章专门讲解,先给出数据类Note,代表一个笔记.含有Name 和content 属性.其代码如下:如果不清楚,我会在之后讲解):

namespace SQlite
{
    public class Note : INotifyPropertyChanged
    {
           private int id;
           [AutoIncrement, PrimaryKey]
            public int ID
            {
               get { return id; }
                set
            {
                if (value!=id)
                {
                    id = value;
                    RaisePropertyChanged("ID");

                }
            }
           }
           private string name;
            [MaxLength(30)]
           public string Name
           {
               get { return name; }
               set
               {
                   if (value != name)
                   {
                       name = value;
                       RaisePropertyChanged("Name");

                   }
               }
           }

            private string content;
            [MaxLength(300)]
            public string Content
            {
                get { return content; }
                set
                {
                    if (value != content)
                    {
                        content = value;
                        RaisePropertyChanged("Content");

                    }
                }
            }

            public event PropertyChangedEventHandler PropertyChanged;
            protected void RaisePropertyChanged(string propertyName)
            {
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
                }
            }
    }
}

windows phone 8.1开发SQlite-建立数据库

private SQLiteAsyncConnection GetConn()
        {

            return new SQLiteAsyncConnection(ApplicationData.Current.LocalFolder.Path + "\\note.db");

        }

        private  async void createButton_Click(object sender, RoutedEventArgs e)
        {

            SQLiteAsyncConnection conn = GetConn();

             await conn.CreateTableAsync<Note>();

            await new MessageDialog("创建数据库成功！").ShowAsync();
        }

windows phone 8.1开发SQlite-增加数据

SQLiteAsyncConnection conn = GetConn();

            await conn.InsertAsync(new Note { Name = "小梦", Content = "小梦我想你" });
            await conn.InsertAsync(new Note { Name = "小梦", Content = "小梦我爱你" });
            await conn.InsertAsync(new Note { Name = "小梦", Content = "小梦我喜欢你" });
            await conn.InsertAsync(new Note { Name = "小梦", Content = "小梦我恨你" });
            await conn.InsertAsync(new Note { Name = "小梦", Content = "小梦我打你" });

            List<Note> notelist = await conn.Table<Note>().ToListAsync();
            notes = new ObservableCollection<Note>(notelist);
            listBox.ItemsSource = notes;
            await new MessageDialog("增加数据成功！").ShowAsync();

windows phone 8.1开发SQlite-删除数据

SQLiteAsyncConnection conn = GetConn();
            var query =  await conn.Table<Note>().FirstAsync();
            for (int i = 0; i < notes.Count;i++ )
            {
                if (notes[i].ID == query.ID)
                {
                    notes.RemoveAt(i);
                    break;
                }
            }

            await conn.DeleteAsync(query as Object);
            listBox.ItemsSource = notes;
            await new MessageDialog("删除数据成功！").ShowAsync();

windows phone 8.1开发SQlite-修改数据

SQLiteAsyncConnection conn = GetConn();
            for (int i = 0; i < notes.Count; i++)
            {
                if (notes[i].Name=="小梦")
                {
                    notes[i].Content = "小梦我爱你";

                }
            }
            var query = conn.Table<Note>().Where(x => x.Name=="小梦");

            var result = await query.ToListAsync();

            foreach (var item in result)
            {

                item.Content = "小梦我爱你";

                await conn.UpdateAsync(item);
            }

            await new MessageDialog("更新数据成功！").ShowAsync();

windows phone 8.1开发SQlite-查询数据

SQLiteAsyncConnection conn = GetConn();

            var query = conn.Table<Note>();

            var result = await query.ToListAsync();
            notes = new ObservableCollection<Note>(result);
            listBox.ItemsSource = notes;
            await new MessageDialog("查询数据成功！").ShowAsync();

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