wpf 数据绑定数据转换

科学的发展-只不过是读大自然写的代码2024-02-26 16:55

1.概要

数据绑定，有时候绑定的数据源和目标的数据类型不同，这时候就需要转换。

2.代码

2.1 xaml(eXtensible Application Markup Language) 可扩展应用程序标记语言

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<Window x:Class="WpfApp6.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:WpfApp6"
        mc:Ignorable="d"
        Title="MainWindow" Height="100" Width="300">
    <Window.Resources>
        <local:boolchange x:Key="boolkey"></local:boolchange>
    </Window.Resources>
    <StackPanel>
        <TextBox Name="source1"></TextBox>
        <TextBlock Text="YES"></TextBlock><CheckBox IsChecked="{Binding ElementName=source1, Path=Text,Converter={StaticResource boolkey}}"></CheckBox>
    </StackPanel>
</Window>

2.2 code

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using System.Globalization;
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 WpfApp6
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }
    public class boolchange : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string? str = value.ToString().ToLower();
            switch(str)
            {
                case "yes":
                    return true;
                case "no": 
                    return false;    
            }
            return false;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

3.运行结果

wpf 数据绑定 数据转换

wpf 数据绑定数据转换