WPF datagrid.rowstyle binding

本文关键字：binding rowstyle datagrid WPF | 更新日期: 2023-09-27 18:14:38

我有一个已知的错误

System.Windows。数据错误:2:无法找到控制FrameworkElement或FrameworkContentElement的目标元素。DataItem =零;目标元素是'GradientStop' (HashCode=81530);目标属性是'Offset' (type 'Double')

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，但它不起作用:

        <DataGrid.Resources>
            <app:BindingProxy x:Key="proxy" Data="{Binding}" />
        </DataGrid.Resources>
        [...]
        <GradientStop Color="#FF2D2D30" Offset="{Binding Data.Percent, Source={StaticResource proxyRow}}" />

System.Windows。数据错误:40:BindingExpression路径错误:"百分比"属性在"对象"ViewModel"(HashCode=37637549)上找不到。BindingExpression:路径= Data.Percent;DataItem = ' BindingProxy ' (HashCode = 3342738);目标元素是'GradientStop' (HashCode=64874797);目标属性是'Offset' (type 'Double')

这是显而易见的，因为数据现在包含了控件的DataContext，这是我的ViewModel。

有什么建议吗?谢谢!

WPF datagrid.rowstyle binding

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工作但报告错误

如何在Silverlight中绑定GradientStop colors或GradientStops Property ?

    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>
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