我有一个列表框,其中填充了定义为Assigned Tasks的类对象。 ItemTemplate在填充时正确绑定并显示相应的信息,但我尝试根据分配的类别的颜色设置每个项目的背景。当我给渐变画笔赋予特定颜色时,背景是正确绑定的,但是当我将它绑定到任务对象的颜色时,它不会显示。在调试中,我已经确认正确设置了我的任务对象的颜色。如何将渐变停止颜色绑定到列表中每个单独对象的颜色?
<ListBox Name="lboxAssignedTasks" SelectionMode="Single" VerticalAlignment="Top" SelectionChanged="lboxAssignedTasks_SelectionChanged"
HorizontalAlignment="Stretch" Margin="5,10,20,0" >
<ListBox.ItemTemplate>
<DataTemplate>
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Name="colTaskName" MinWidth="200"/>
<ColumnDefinition Name="colDateDue" MinWidth="75" />
<ColumnDefinition Name="colStatus" MinWidth="75"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{Binding Path=TaskName}" MinHeight="30" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="5,5,0,0"/>
<TextBlock Grid.Column="1" Text="{Binding Path=DateDue}" MinHeight="30" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="5,5,0,0"/>
<TextBlock Grid.Column="2" Text="{Binding Path=Status}" MinHeight="30" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="0,5,0,0"/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.Resources>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Background" Value="{DynamicResource BackGroundGradBrush}" />
<Style.Resources>
<LinearGradientBrush StartPoint="1,0" EndPoint="1,1" x:Key="BackGroundGradBrush">
<GradientStop Color="White" Offset="0.2" />
<GradientStop Color="White" Offset="0.85" />
<GradientStop Color="{Binding Path=CatColor}" Offset="0.95" />
</LinearGradientBrush>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="LightBlue" />
</Style.Resources>
</Style>
</ListBox.Resources>
</ListBox>
类对象定义:
public class AssignedTask : UnAssignedTask
{
public int TaskId { get; set; }
public string Status { get; set; }
public string AssignedUser { get; set; }
public string AssignedBy { get; set; }
public string DateAssigned { get; set; }
public string DateDue { get; set; }
public string UserNotes { get; set; }
public bool IsCompleted { get; set; }
public Category Cat { get; set; }
public Color CatColor { get; set; }
}
答案 0 :(得分:1)
我无法看到CatColor的类型,但请确保CatColor在AssignedTask中的类型为System.Windows.Media.Color
。
而且,您可能希望使用如下所述的ItemContainerStyle:ListBoxItem style in <ListBox.Resources> or in <ListBox.ItemContainerStyle>?
答案 1 :(得分:0)
我将模板移动到并更改为a以处理通过设置网格背景而被覆盖的突出显示触发器。线性渐变画笔从资源中移出,而不是作为。这暴露了列表框中每个AssignedTask对象的CatColor属性。
<ListBox Name="lboxAssignedTasks" SelectionMode="Single" VerticalAlignment="Top" SelectionChanged="lboxAssignedTasks_SelectionChanged"
HorizontalAlignment="Stretch" Margin="5,10,20,0">
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<Grid Name="lbItemGrid">
<Grid.Background>
<LinearGradientBrush StartPoint="1,0" EndPoint="1,1">
<GradientStop Color="White" Offset="0.2" />
<GradientStop Color="White" Offset="0.85" />
<GradientStop Color="{Binding Path=CatColor}" Offset="0.95" />
</LinearGradientBrush>
</Grid.Background>
<Grid.ColumnDefinitions>
<ColumnDefinition Name="colTaskName" MinWidth="200"/>
<ColumnDefinition Name="colDateDue" MinWidth="75" />
<ColumnDefinition Name="colStatus" MinWidth="75"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{Binding Path=TaskName}" MinHeight="30" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="15,5,0,0"/>
<TextBlock Grid.Column="1" Text="{Binding Path=DateDue}" MinHeight="30" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="5,5,0,0"/>
<TextBlock Grid.Column="2" Text="{Binding Path=Status}" MinHeight="30" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="0,5,0,0"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" TargetName="lbItemGrid" Value="Lightblue" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>