WPF datagrid.rowstyle 绑定

WPF datagrid.rowstyle binding

我遇到了一个已知错误

System.Windows.Data 错误:2:找不到目标元素的管理 FrameworkElement 或 FrameworkContentElement。BindingExpression:Path=Percent;数据项=空;目标元素是 'GradientStop' (HashCode=81530);目标 属性 是 'Offset'(类型 'Double')

关于这部分代码:

        <DataGrid.RowStyle>
            <Style TargetType="DataGridRow">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding State}" Value="Started">
                        <Setter Property="Background">
                            <Setter.Value>
                                <LinearGradientBrush EndPoint="1,0" StartPoint="0,0">
                                    <GradientStop Color="Green" Offset="0" />
                                    <GradientStop Color="#FF2D2D30" Offset="{Binding Percent}" />
                                </LinearGradientBrush>
                            </Setter.Value>
                        </Setter>
                    </DataTrigger>
                    <Trigger Property="Validation.HasError" Value="true">
                        <Setter Property="BorderThickness" Value="1"/>
                        <Setter Property="BorderBrush" Value="Red"/>
                    </Trigger>
                </Style.Triggers>
            </Style>
        </DataGrid.RowStyle>

我已经尝试将 DataContext 设置为代理,但没有成功:

        <DataGrid.Resources>
            <app:BindingProxy x:Key="proxy" Data="{Binding}" />
        </DataGrid.Resources>

        [...]
        <GradientStop Color="#FF2D2D30" Offset="{Binding Data.Percent, Source={StaticResource proxyRow}}" />

System.Windows.Data 错误:40:BindingExpression 路径错误:'Percent' 属性 在 'object' ''ViewModel' (HashCode=37637549)' 上找不到。 BindingExpression:Path=Data.Percent; DataItem='BindingProxy' (哈希码=3342738);目标元素是 'GradientStop' (HashCode=64874797);目标 属性 是 'Offset'(类型 'Double')

这很明显,因为数据现在包含控件的 DataContext,即我的 ViewModel。

有什么建议吗?谢谢!

正如其他帖子所建议的,我认为它不适用于我的问题,但使用转换器非常适合!以下是一些参考资料:

Binding GradientStop works but reports error

How to bind GradientStop Colours or GradientStops Property in Silverlight?

    public object Convert(object value, Type targetType, object parameter,
        System.Globalization.CultureInfo culture)
    {
        Model.ListParameters parameters = (Model.ListParameters)value;
        if(parameters !=null)
        {
            var start = new GradientStop();
            start.Color = Colors.Green;
            start.Offset = 0;

            var stop = new GradientStop();
            stop.Color = (Color)ColorConverter.ConvertFromString("#FF2D2D30");
            stop.Offset = parameters .Percent;

            var result = new LinearGradientBrush();
            result.StartPoint = new Point(0, 0);
            result.EndPoint = new Point(1, 0);
            result.GradientStops.Add(start);
            result.GradientStops.Add(stop);

            return result;
        }
        return null;
    }

和 XAML

<UserControl.Resources>
   <app:GradientProgressConverter  x:Key="GradientProgressConverter" />
</UserControl.Resources>
<DataGrid>
   <DataGrid.RowStyle>
      <Style TargetType="DataGridRow">
         <Style.Triggers>
            <DataTrigger Binding="{Binding State}" Value="Started">
                <Setter Property="Background" Value="{Binding Converter={StaticResource GradientProgressConverter}}" />
            </DataTrigger>
         </Style.Triggers>
      </Style>
   </DataGrid.RowStyle>
</<DataGrid>