Question

我找不到问题的解决方案有困难，即我有一个想法，根据区域为不同颜色的组合框的每一行/每列着色，但我找不到任何线索或提示或说明这样做。该应用程序非常简单

 <ComboBox x:Name="comboBox1" HorizontalAlignment="Left" Margin="84,70,0,0" VerticalAlignment="Top" Width="230"/>

这是我的XAML组合框，我从代码填写：

SortedList<int, string> AreaList = new SortedList<int, string>();
        AreaList.Add(1, "Agriculture");
        AreaList.Add(2, "Forestry");
        AreaList.Add(3, "Fruits");
        AreaList.Add(4, "Food");
        AreaList.Add(5, "Metals");
        AreaList.Add(6, "Mining");
        AreaList.Add(7, "Electricity");
        AreaList.Add(8, "Building Contracts");
        AreaList.Add(9, "Transport");
        AreaList.Add(10, "Alcohol");
        AreaList.Add(11, "Information Technologies");
        AreaList.Add(12, "Health And Social Services");
        AreaList.Add(13, "Art and Entertainement");
        AreaList.Add(14, "Hospitality Business");
        AreaList.Add(15, "Education");
        AreaList.Add(16, "Real Estate");
        AreaList.Add(17, "Sales");
        AreaList.Add(18, "Architecture");
        AreaList.Add(19, "Engineering");
        AreaList.Add(20, "Wholesale");
        AreaList.Add(21, "Other");

        comboBox1.ItemsSource = AreaList.ToList();
        comboBox1.SelectedValuePath = "Key";
        comboBox1.DisplayMemberPath = "Value";

这些项目中的每一个都在另一个窗口中显示颜色，但我想在组合框中显示这些颜色，即＆＃34;农业＆＃34;行/列应为绿色等。有没有解决方案，还是我必须重做它？

Answer 1

您可以使用ItemContainerStyle和Converter

 public class StringToColorConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (((KeyValuePair<int, string>)value).Value.ToString() == "Agriculture")
                return Brushes.Green;
            //and so on or other ways to get the color
            return Brushes.Transparent;
        }

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

和XAML如下，

<Window.Resources>
        <local:StringToColorConverter x:Key="StringToColorConverter"/>
    </Window.Resources>
    <Grid >
        <ComboBox x:Name="comboBox1" HorizontalAlignment="Left" Margin="84,70,0,0" VerticalAlignment="Top" Width="230">
            <ComboBox.ItemContainerStyle>
                <Style TargetType="ComboBoxItem">
                    <Setter Property="Background" Value="{Binding Converter={StaticResource StringToColorConverter}}">

                    </Setter>
                </Style>
            </ComboBox.ItemContainerStyle>
        </ComboBox>
    </Grid>

Answer 2

对于映射到颜色的每个值，您可以将ItemContainerStyle与DataTrigger一起使用：

<ComboBox x:Name="comboBox1">
    <ComboBox.ItemContainerStyle>
        <Style TargetType="ComboBoxItem">
            <Style.Triggers>
                <DataTrigger Binding="{Binding Value}" Value="Agriculture">
                    <Setter Property="Background" Value="Green" />
                </DataTrigger>
                <DataTrigger Binding="{Binding Value}" Value="Forestry">
                    <Setter Property="Background" Value="Red" />
                </DataTrigger>
                <!-- and so on-->
            </Style.Triggers>
        </Style>
    </ComboBox.ItemContainerStyle>
</ComboBox>

您可能还想阅读此内容：

在WPF中更改ComboBox的背景颜色： https://blog.magnusmontin.net/2014/04/30/changing-the-background-colour-of-a-combobox-in-wpf-on-windows-8/

组合框中的行？

2 个答案: