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
<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
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