数据绑定

Windows 鼠标文件格式

Windows 的鼠标文件格式有两种，一种是静态文件（.cur），另一种是动态文件（.ani）。

其中 cur 文件本身我们操作系统就有，大家可以通常在 C:\Windows\Cursors 这个目录下面找到。

示例代码

XAML

<Window x:Class="NotifyData.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:NotifyData"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <StackPanel Orientation="Vertical">
        <ProgressBar Name="myProgressBar" Height="20" Maximum="100" Minimum="0" Value="{Binding Count}"></ProgressBar>
    </StackPanel>
</Window>Code language: HTML, XML (xml)

C# 代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace NotifyData
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MyViewModel myViewModel = new MyViewModel();
        public MainWindow()
        {
            InitializeComponent();
            myViewModel.Count = 50;
            this.myProgressBar.DataContext = myViewModel;

        }
    }

    public class MyViewModel: INotifyPropertyChanged
    {
        private int count;
        public int Count
        {
            get
            {
                return count;
            }

            set
            {
                count = value;
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Count"));
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }
}Code language: HTML, XML (xml)

02-后台异步改变数据源

public partial class MainWindow : Window
{
    public MyViewModel myViewModel = new MyViewModel();
    public MainWindow()
    {
        InitializeComponent();
        myViewModel.Count = 50;
        this.myProgressBar.DataContext = myViewModel;

        new Thread(new ThreadStart(Deal)) { IsBackground = true }.Start();
    }

    private void Deal()
    {
        while (true)
        {
            myViewModel.Count++;
            Thread.Sleep(200);
        }
    }
}

03-多个窗体绑定同一个数据源

namespace NotifyData
{
    public static class DataSource
    {
        public static MyViewModel myViewModel = new MyViewModel();
    }
}

public partial class Window1 : Window
{
    public Window1()
    {
        InitializeComponent();
        this.myProgressBar.DataContext = DataSource.myViewModel;
    }
}

07-数据源是一个字典绑定多个窗体

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace NotifyData
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow(bool b)
        {
            InitializeComponent();
        }
        public MainWindow()
        {
            InitializeComponent();
            for (int i = 0; i < 5; i++)
            {
                DataSource.myViewModel.Count.Add(i, i);
            }

            var progress0 = new ProgressBar();
            progress0.Maximum = 100;
            progress0.Minimum = 0;
            progress0.Height = 20;

            Binding bind0 = new Binding()
            {
                Source = DataSource.myViewModel,
                Path = new PropertyPath("Count[0]")
            };
            BindingOperations.SetBinding(progress0, ProgressBar.ValueProperty, bind0);
            this.myStack.Children.Add(progress0);

            for (int i = 1; i < 5; i++)
            {
                MainWindow w1 = new MainWindow(true);

                var progress = new ProgressBar();
                progress.Maximum = 100;
                progress.Minimum = 0;
                progress.Height = 20;

                Binding bind = new Binding()
                {
                    Source = DataSource.myViewModel,
                    Path = new PropertyPath("Count[" + i + "]")
                };
                BindingOperations.SetBinding(progress, ProgressBar.ValueProperty, bind);

                w1.myStack.Children.Add(progress);
                w1.Show();
            }

            new Thread(new ThreadStart(Deal)) { IsBackground = true }.Start();
        }

        private Random random = new Random();
        private void Deal()
        {
            while (true)
            {
                int index = random.Next(0, DataSource.myViewModel.Count.Count);
                DataSource.myViewModel.Count[index]++;
                DataSource.myViewModel.Count = new Dictionary<int, int>(DataSource.myViewModel.Count);

                Thread.Sleep(20);
            }
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {

        }
    }

    public class MyViewModel : INotifyPropertyChanged
    {
        private Dictionary<int, int> count;
        public Dictionary<int, int> Count
        {
            get
            {
                if (count == null)
                {
                    count = new Dictionary<int, int>();
                }
                return count;
            }

            set
            {
                count = value;
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Count"));
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }
}

08-窗体的标题动态绑定

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace NotifyData
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow(bool b)
        {
            InitializeComponent();
        }
        public MainWindow()
        {
            InitializeComponent();

            // 准备数据源
            for (int i = 0; i < 5; i++)
            {
                DataSource.myViewModel.Count.Add(i, i);
                DataSource.myViewModel.Name.Add(i, i.ToString());
            }

            // 主窗体动态添加控件 并且绑定
            var progress0 = new ProgressBar();
            progress0.Maximum = 100;
            progress0.Minimum = 0;
            progress0.Height = 20;

            Binding bind0 = new Binding()
            {
                Source = DataSource.myViewModel,
                Path = new PropertyPath("Count[0]")
            };
            BindingOperations.SetBinding(progress0, ProgressBar.ValueProperty, bind0);
            this.myStack.Children.Add(progress0);

            BindingOperations.SetBinding(this, Window.TitleProperty, new Binding() { Source = DataSource.myViewModel, Path = new PropertyPath("Name[0]") });

            // 添加多个子窗体（也是主窗体）
            for (int i = 1; i < 5; i++)
            {
                MainWindow w1 = new MainWindow(true);

                var progress = new ProgressBar();
                progress.Maximum = 100;
                progress.Minimum = 0;
                progress.Height = 20;

                Binding bind = new Binding()
                {
                    Source = DataSource.myViewModel,
                    Path = new PropertyPath("Count[" + i + "]")
                };
                BindingOperations.SetBinding(progress, ProgressBar.ValueProperty, bind);

                BindingOperations.SetBinding(w1, Window.TitleProperty, new Binding() { Source = DataSource.myViewModel, Path = new PropertyPath("Name[" + i + "]") });

                w1.myStack.Children.Add(progress);
                w1.Show();
            }

            new Thread(new ThreadStart(Deal)) { IsBackground = true }.Start();
        }

        private Random random = new Random();
        private void Deal()
        {
            while (true)
            {
                int index = random.Next(0, DataSource.myViewModel.Count.Count);
                DataSource.myViewModel.Count[index]++;
                DataSource.myViewModel.Count = new Dictionary<int, int>(DataSource.myViewModel.Count);

                Thread.Sleep(20);
            }
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {

        }
    }

    public class MyViewModel : INotifyPropertyChanged
    {
        private Dictionary<int, int> count;
        public Dictionary<int, int> Count
        {
            get
            {
                if (count == null)
                {
                    count = new Dictionary<int, int>();
                }
                return count;
            }

            set
            {
                count = value;
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Count"));
            }
        }

        private Dictionary<int, string> name;
        public Dictionary<int, string> Name
        {
            get
            {
                if (name == null)
                {
                    name = new Dictionary<int, string>();
                }
                return name;
            }

            set
            {
                name = value;
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Name"));
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }
}