WPF值转换实例

WPF绑定功能非常方便，有时候点击某值时在另t一处显示此值的另一表现形式或调用其对应的其它值，用WPF值转换功能会很方便，下面就一LISTBOX和TEXTBLOCK控件，把LISTBOX中的值转换成除以1000后的结果显示在TextBlock中

1、值转换类：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Data;

namespace WpfApplication4

{

    class MyValueConvert:IValueConverter

    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

        {

            try

            {

                int v = int.Parse(value.ToString());

                return v /  + "M";

            }

            catch (Exception ex)

            {

                return Binding.DoNothing;

            }

        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

        {

            throw new NotImplementedException();

        }

    }

}

2、主窗口C#

using System;

using System.Collections.Generic;

using System.Collections.ObjectModel;

using System.Linq;

using System.Text;

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 WpfApplication4

{

    /// <summary>

    /// MainWindow.xaml 的交互逻辑

    /// </summary>

    public partial class MainWindow : Window

    {

        private ObservableCollection<string> obj = new ObservableCollection<string>();

        public MainWindow()

        {

            InitializeComponent();

            obj.Add("");

            obj.Add("");

            obj.Add("");

            obj.Add("");

            obj.Add("");

            this.listbox.ItemsSource = obj;

        }

    }

}

3、显示界面

<Window x:Class="WpfApplication4.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:local="clr-namespace:WpfApplication4"

        Title="MainWindow" Height="" Width="">

    <Window.Resources>

        <local:MyValueConvert x:Key="myCvt"></local:MyValueConvert>

    </Window.Resources>

    <Grid>

        <StackPanel>

            <TextBlock Name="tb" Margin="" Text="{Binding ElementName=listbox,Path=SelectedItem,Converter={StaticResource myCvt}}"></TextBlock>

            <ListBox Name="listbox"/>

        </StackPanel>

    </Grid>

</Window>