WPF：如何突出显示一个DataGrid的所有单元格满足条件？ [英] WPF: How to highlight all the cells of a DataGrid meeting a condition?

问题描述

（wpftoolkit）datagrid通常表示一个对象的集合，其行代表每个对象，列是相应的属性。

我没有这样使用它。我使用它来代表2个集合之间的交集。行表示集合A的对象，列表示集合B中的对象。x，y处的单元格表示来自fn（collectionA [x]，collectionB [y]）的某个值。

这工作正常。现在我想要查询单元格值。我想要用户能够做的事情，比如突出显示大于0的所有单元格？
如何使用datagrid？

解决方案

一种方法是创建一个以相应方式行为的数据单元格模板（通过controltemplates.triggers集合）。另一种方式是创建一个数据单元格样式，并使用样式触发器来设置一个给定的绑定具有一定值（通过style.triggers集合）的背景。

或者您可以使用混合方法。

您的数据单元格模板中可能包含一个包含所有内容的边框元素。例如，您可以为该边框元素创建内联样式。

 < Border Width =AutoHeight =AutoPadding =6,10,6,10CornerRadius = 0,0,20,20> 
< Border.Style> 
< Style TargetType ={x：Type Border}> 
< Setter Property =BackgroundValue =White/> 
< Style.Triggers> 
< DataTrigger Binding ={Binding Highlighted}Value =True> 
< Setter Property =BackgroundValue ={StaticResource GreenGradientSuccessBrush}/> 
< / DataTrigger> 
< /Style.Triggers> 
< / Style> 
< /Border.Style> 
< / Border> 
  

如果这是坐在数据模板中，边框元素的数据文本将是包含的对象，当内容的突出显示属性（假设内容是具有高亮布尔属性的类）时，边框触发器将触发为True。

如果内容是一个整数，你想要触发器，当它大于零时，你将不得不使用

 < DataTrigger绑定={Binding，Converter = {StaticResource GreaterThanZeroConverter}}Value =True> 
  

其中GreaterThanZeroConverter是一个合适的值的转换器。

The (wpftoolkit) datagrid generally represents a collection of objects with rows representing each object, and the columns the repective properties.

I am not using it this way. I am using it to represent the "intersection" between 2 collections. Rows represent objects of collection A and columns represent objects in collections B. A cell at x,y represent some value from fn(collectionA[x],collectionB[y]).

This works fine. Now I want to be able to query the cell values. I want the user to be able to do things like highlight all cells with value greater than 0? How do I do this with the datagrid?

解决方案

One way is to create a data cell template that behaves in a corresponding manner (via controltemplates.triggers collection).

Another way is to create a data cell style and use style triggers to set the background when a given binding has a certain value (via style.triggers collection).

Or you can use a hybrid approach.

Inside your data cell template, you might have a border element containing everything. You can, for example, create an inline style for that border element.

<Border Width="Auto" Height="Auto" Padding="6,10,6,10" CornerRadius="0,0,20,20">
    <Border.Style>
        <Style TargetType="{x:Type Border}" >
            <Setter Property="Background" Value="White" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding Highlighted}" Value="True">
                    <Setter Property="Background" Value="{StaticResource GreenGradientSuccessBrush}" />
                </DataTrigger>
            </Style.Triggers>
        </Style>    
    </Border.Style>
</Border>

If this is sitting in a data template, the datacontext of the border element will be the contained object, and the border trigger will fire when "Highlighted" property of the content (assuming content is a class with a "Highlighted" boolean property) is "True".

If your content is an integer and you want the trigger to fire when it is greater than zero you will have to use

<DataTrigger Binding="{Binding, Converter={StaticResource GreaterThanZeroConverter}}" Value="True">

where the GreaterThanZeroConverter is a suitable value converter.

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