如何绑定一个布尔值在WPF中的ComboBox [英] how to bind a boolean to combobox in wpf

问题描述

好吧，我不知道如何将一个布尔值属性为combobox.Combobox绑定将是一个是/否组合框。

Well I was wondering how to bind a boolean property to a combobox.Combobox will be a yes/no combobox.

推荐答案

您可以使用ValueConverter为布尔值转换为一个ComboBox指数和背部。像这样的：

You could use a ValueConverter to convert the boolean value to a ComboBox index and back. Like this:

public class BoolToIndexConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return ((bool)value == true) ? 0 : 1;   
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return ((int)value == 0) ? true : false;
        }
    }
}

假设是位于索引0和无索引1。然后你必须使用转换器绑定到SelectedIndex属性。对于这一点，你宣布你的转换器，你的资源部分：

Assuming Yes is on index 0 and No on index 1. Then you'd have to use that converter in binding to the SelectedIndex property. For this, you declare your converter in your resources section:

  <Window.Resources>
    <local:BoolToIndexConverter x:Key="boolToIndexConverter" />
  </Window.Resources>

然后你用它在你的绑定：

Then you use it in your binding:

<ComboBox SelectedIndex="{Binding YourBooleanProperty, Converter={StaticResource boolToIndexConverter}}"/>

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