Question

我想根据ist值更改wpf数据网格中单元格的背景。我的数据网格如下：

<DataGrid x:Name="dataGridView_Comparison" ItemsSource="{Binding}" HorizontalAlignment="Stretch"    AlternatingRowBackground="LightBlue" AlternationCount="2"  Height="537" Margin="15,48,5,0" VerticalAlignment="Top" Width="1016" Background="#FF2C2727" Grid.ColumnSpan="2" Style="{DynamicResource DGHeaderStyle}" selectionUnit="FullRow">

我正在c＃中动态创建此数据网格，因为列数始终根据输入而变化。做到这一点的代码部分是：

DataTable table = new DataTable();
        table.Columns.Add("Column1", typeof(string));
        foreach (string num in numbersList)
        {
            table.Columns.Add(num, typeof(string)); //Adding each numbers as a column in the table
        }
        foreach (string tc in uniqueCases)
        {
            DataRow newRow = table.NewRow(); 

            newRow["Column1"] = tc+"_Case"; //Adding the case name of the row
            foreach (string num in numbersList)
            {
                //For each number column add value corresponding to the condition..
                newRow[num] = "0"; //Default value as 0
                if (list_beforeThreshold.ContainsKey(num + tc) == true)
                {
                    newRow[num] = "1";
                }
                if (list_afterThreshold.ContainsKey(num + tc) == true)
                {
                    newRow[num] = "2";
                }
            table.Rows.Add(newRow);
        }

dataGridView_Comparison.DataContext = table.DefaultView; //在wpf中添加到datagrid

我在C＃和WPF中还很陌生。有人可以指导我如何根据它们的值（0,1,2）为单元格提供不同的颜色。 PS：我现在正在尝试数据触发。但没有任何进展。

编辑1：无法在xaml中对列号和列名进行硬编码，因为它们是在c＃中动态填充的。

预先感谢

Answer 1

此DataTrigger应用于DataGrid中的所有单元格。符合条件时，触发器将改变颜色；未满足条件时，触发器将变回颜色。

<DataGrid>
    <DataGrid.CellStyle>
        <Style TargetType="DataGridCell">
            <Style.Triggers>
                <DataTrigger Binding="{Binding Property}"
                             Value="True">
                    <Setter Property="Background" Value="Red"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </DataGrid.CellStyle>
</DataGrid>

Answer 2

您可以使用 IValueConverter 更改背景颜色。

在xaml中定义Converter类：

<Window.Resources>
    <local:NameToBrushConverter x:Key="NameToBrushConverter"/>
</Window.Resources>
<Grid>
    <DataGrid x:Name="testDG" ItemsSource="{Binding tempData}">
        <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding Name}">
                <DataGridTextColumn.ElementStyle>
                    <Style TargetType="{x:Type TextBlock}">
                        <Setter Property="Background" Value="{Binding Name, Converter={StaticResource NameToBrushConverter}}"/>
                    </Style>
                </DataGridTextColumn.ElementStyle>
            </DataGridTextColumn>
        </DataGrid.Columns>
    </DataGrid>
</Grid>

转换器类别：

public class NameToBrushConverter : IValueConverter
{
  public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
  {
    string input = value as string;
    switch (input)
    {
        case "Smith":
            return Brushes.LightGreen;
        case "Willam":
            return Brushes.LightPink;
        default:
            return DependencyProperty.UnsetValue;
    }
 }
 public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
 {
    throw new NotSupportedException();
 } }

如何根据值更改WPF数据网格中单元格的背景颜色

2 个答案: