如何在XAML绑定中使用XML键和值 [英] How to use xml key and values in xaml binding

问题描述

<?xml version="1.0" encoding="utf-8" ?>
<LanguageDictionary>
  <item key="ButtonBackground" value="Red"/>
</LanguageDictionary>

 <ResourceDictionary>
        <XmlDataProvider x:Key="brushes" Source="LayoutConfiguration.xml" XPath="/LanguageDictionary/item"/>
        <conv:StringToColorConverter x:Key="StringToColorConverter"/>
  </ResourceDictionary>

 <SolidColorBrush x:Key="Pink01Brush" Color="{Binding Source={StaticResource brushes},Converter={StaticResource StringToColorConverter}, XPath=ButtonBackground}" />

我已经像上面那样编码了.但是相应的笔刷颜色值不会从xml更新.

I have coded like above. But corresponding brush color value is not updated from xml. Is it possible to change the brush style using xml in xaml?

推荐答案

Jayapradha，

Hi Jayapradha,

>>可以在xaml中使用xml更改画笔样式吗?

请按照以下步骤操作并尝试

Please follow the below  steps and have a try.

ResourceDictionary  XAML:

ResourceDictionary  XAML:

 <!--<XmlDataProvider x:Key="brushes" Source="testxml.xml" XPath="/LanguageDictionary/item"/>-->
    <XmlDataProvider x:Key="testxmlbrushes" XPath="LanguageDictionary/item">
        <x:XData>
            <LanguageDictionary xmlns="">
                <item key="ButtonBackground" value="Red"/>
            </LanguageDictionary>
        </x:XData>
    </XmlDataProvider>
    <SolidColorBrush x:Key="Pink01Brush" Color="{Binding Source={StaticResource testxmlbrushes},XPath=@value,Converter={StaticResource StringToColorConverter}}" />

窗口:

  <Window.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="C:\Users\Desktop\Wpf_Example\YourSolidColorBrushdic.xaml "></ResourceDictionary>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Window.Resources>
    <Grid>
        <Rectangle   Width="200"   Height="100"  Stroke="Black" StrokeThickness="4">
            <Rectangle.Fill>
                <SolidColorBrush Color="{Binding Color, Source={StaticResource Pink01Brush}}" />
            </Rectangle.Fill>
        </Rectangle>
    </Grid>

App.xaml:

 <Application.Resources>
        <local:StringToColorConverter x:Key="StringToColorConverter"/>
 </Application.Resources>

StringToColorConverter:

StringToColorConverter:

 public class StringToColorConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((string)value == "Green")
            {
                return Colors.Green;
            }
            else if ((string)value == "Red")
            {
                return Colors.Red;
            }
            else
            {
                return Colors.Black;
            }
        }

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

    }

最好的问候，

Best Regards,

吕汉楠

这篇关于如何在XAML绑定中使用XML键和值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！