Xceed datagrid - 根据 DateTime 值更改数据行颜色答案

【问题标题】：Xceed datagrid - change datarow colour based on DateTime valueXceed datagrid - 根据 DateTime 值更改数据行颜色
【发布时间】：2017-08-29 11:48:47
【问题描述】：

我有一个包含一般发票信息的数据网格（Xceed 社区版版本 3.1.0）。其中一个字段包含发票的到期日期。我想为到期日期过期的行设置不同的颜色。为此，我使用了一个值转换器。这是我的 XAML：

<dg:DataGridControl.Resources>
    <Style TargetType="{x:Type dg:DataRow}" BasedOn="{StaticResource DefaultDataRowStyle}">
        <Setter Property="Background" Value="{Binding DocumentDueDate, Converter={StaticResource DueDateToBrushConverter}}"/>
        <!--<Setter Property="Background" Value="OrangeRed"/>-->
    </Style>
</dg:DataGridControl.Resources>

<dg:DataGridControl.Columns>
    <dg:Column Title="{bx:LocalizeBinding Type, Global=True}" FieldName="MovementType" Width="45"/>
    <dg:Column Title="{bx:LocalizeBinding Number, Global=True }" FieldName="DocumentNumber" Width="90"/>
    <dg:Column Title="{bx:LocalizeBinding Date, Global=True }" FieldName="DocumentDate" Width="90"/>
    <dg:Column Title="{bx:LocalizeBinding DueDate, Global=True }" FieldName="DocumentDueDate" Width="90"/>
    <dg:Column Title="{bx:LocalizeBinding Debit, Global=True }" FieldName="Debit" CellHorizontalContentAlignment="Right" Width="80">
        <dg:Column.CellContentTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding StringFormat=N2}" HorizontalAlignment="Right"/>
            </DataTemplate>
        </dg:Column.CellContentTemplate>
    </dg:Column>
    <dg:Column Title="{bx:LocalizeBinding Credit, Global=True }" FieldName="Credit" CellHorizontalContentAlignment="Right" Width="80">
        <dg:Column.CellContentTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding StringFormat=N2}" HorizontalAlignment="Right"/>
            </DataTemplate>
        </dg:Column.CellContentTemplate>
    </dg:Column>
    <dg:Column Title="{bx:LocalizeBinding Balance, Global=True }" FieldName="Balance" CellHorizontalContentAlignment="Right">
        <dg:Column.CellContentTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding StringFormat=N2}" HorizontalAlignment="Right"/>
            </DataTemplate>
        </dg:Column.CellContentTemplate>
    </dg:Column>
    <dg:Column Title="{bx:LocalizeBinding Difference, Global=True }" FieldName="Difference" CellHorizontalContentAlignment="Right">
        <dg:Column.CellContentTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding StringFormat=N2}" HorizontalAlignment="Right"/>
            </DataTemplate>
        </dg:Column.CellContentTemplate>
    </dg:Column>
    <dg:Column Title="{bx:LocalizeBinding Currency, Global=True }" FieldName="Currency" Width="70"/>
    <dg:Column Title="{bx:LocalizeBinding Description, Global=True }" FieldName="Description" Width="250" TextWrapping="Wrap">
    </dg:Column>
</dg:DataGridControl.Columns>

<dg:DataGridControl.View>
    <dg:TableView/>
</dg:DataGridControl.View>

这是我的转换器类：

public class DueDateToBrushConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        DateTime? input = value as DateTime?;
        if (input.HasValue && input < DateTime.Now)
            return Brushes.OrangeRed;
        else
            return Brushes.Transparent;
    }

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

我在转换器中设置了一个断点并执行了代码，但行颜色没有改变。将颜色设置为固定颜色（如注释行中所示）效果很好。我不知道我做错了什么。任何帮助将不胜感激。

【问题讨论】：

标签： c# wpf datagrid xceed

【解决方案1】：

尝试使用 DataTrigger：

<dg:DataGridControl.Resources>
    <Style TargetType="{x:Type dg:DataRow}" BasedOn="{StaticResource DefaultDataRowStyle}">
        <Style.Triggers>
           <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=DataContext.DocumentDueDate, Converter={StaticResource ResourceKey=DueDateToBrushConverter}}" Value="true">
                <Setter Property="Background" Value="OrangeRed" />
           </DataTrigger>
        </Style.Triggers>
    </Style>
</dg:DataGridControl.Resources>

还有转换器：

public class DueDateToBrushConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        DateTime? input = value as DateTime?;
        if (input.HasValue && input < DateTime.Now)
            return true;
        else
            return false;
    }

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

【讨论】：