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WPF值转换实例

2024-08-12 14:46:16   221人阅读

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 / 1000 + "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("1000");            obj.Add("10000");            obj.Add("100000");            obj.Add("10000000");            obj.Add("100000000");            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="350" Width="525">    <Window.Resources>        <local:MyValueConvert x:Key="myCvt"></local:MyValueConvert>    </Window.Resources>    <Grid>        <StackPanel>            <TextBlock Name="tb" Margin="20" Text="{Binding ElementName=listbox,Path=SelectedItem,Converter={StaticResource myCvt}}"></TextBlock>            <ListBox Name="listbox"/>               </StackPanel>    </Grid></Window>

 

WPF值转换实例


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