Question

在我的应用程序中，我使用“DataGrid”动态绑定值集。同样基于绑定的值，我需要更改绑定值的前景色。

这是我的XAML和C＃代码

XAML：

                            <my:DataGridTemplateColumn Header="Priority">
                                <my:DataGridTemplateColumn.CellTemplate>
                                    <DataTemplate>
                                        <TextBlock HorizontalAlignment="Left" Name="txtPriority" Text="{Binding MessagePriority}" FontWeight="Bold">  
                                          <TextBlock.Resources>
                                            <Style TargetType="TextBlock">
                                                <Setter Property="Foreground" Value="{Binding ForegroundBrush}" />
                                            </Style>
                                        </TextBlock.Resources>
                                        </TextBlock>

                        </my:DataGrid.Columns>                            

                    </my:DataGrid>

C＃：

private SolidColorBrush _foregroundBrush;

        public SolidColorBrush ForegroundBrush
        { 
            get
            {
                return _foregroundBrush;
            }
            set
            {
                if (_foregroundBrush != value)
                {
                    _foregroundBrush = value;
                    RaisePropertyChanged(() => _foregroundBrush);
                }
            }
        }

var color = (Color)ColorConverter.ConvertFromString("#FF00FF");
                                    var brush = new SolidColorBrush(color);
                                    ForegroundBrush = brush;

Answer 1

有几种方法可以做到这一点。这在很大程度上取决于您的要求，所以如果您更好地和更详细地解释它们会更好。但是，由于您没有，我不能在此示例中使用您的确切详细信息，您将不得不使其适应您的项目。第一种方法是简单地使用DataTrigger ...这种方法适用于最多8种不同的值/颜色对：

<DataGrid ItemsSource="{Binding RadioButtonData}">
    <DataGrid.Columns>
        <DataGridTemplateColumn>
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding Label}">
                        <TextBlock.Style>
                            <Style>
        <Style.Triggers>
            <DataTrigger Binding="{Binding SomeValue}" Value="Something">
                <Setter Property="TextElement.Foreground" Value="LightGreen" />
            </DataTrigger>
            <DataTrigger Binding="{Binding SomeValue}" Value="Another thing">
                <Setter Property="TextElement.Foreground" Value="LightBlue" />
            </DataTrigger>
            <DataTrigger Binding="{Binding SomeValue}" Value="A different thing">
                <Setter Property="TextElement.Foreground" Value="LightPink" />
            </DataTrigger>
        </Style.Triggers>
                            </Style>
                        </TextBlock.Style>
                    </TextBlock>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>
    </DataGrid.Columns>
</DataGrid>

您可以使用的另一种方法是将Converter课程与Binding一起使用。您可以在许多在线帖子中找到这样做的详细示例......以下是一些：

How to set Foreground of DataGrid Column with ValueConverter
Datagrid AutoGenerateColumns="True" forecolor IValueConverter

Answer 2

Hai Everyone，

        First of all i thanks to all for see my question and at that time send your answers. Now, i got the answer, i have to use the converter class for convert color to Solidcolorbursh like as below:

ValueConverter.cs

 public class ValueConverter : IValueConverter
    {
        public object Convert(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value == null || !(value is decimal))
                return new SolidColorBrush(ForegroundBrush);

            var dValue = System.Convert.ToDecimal(value);
            if (dValue < 0)
                return new SolidColorBrush(ForegroundBrush);
            else
                return new SolidColorBrush(ForegroundBrush);
        }

        public object ConvertBack(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return null;
        }

    }

XMAL：

首先，我们可以对类名称空间进行decalre，如：

xmlns:convert="clr-namespace:Helper"
<Grid.Resources>
        <convert:ValueConverter x:Key="ValueConverter"></convert:ValueConverter>
 </Grid.Resources>

<my:DataGridTemplateColumn Header="Priority">
        <my:DataGridTemplateColumn.CellTemplate>
               <DataTemplate>
               <TextBlock HorizontalAlignment="Left" Name="txtPriority" Text="{Binding Priority}" FontWeight="DemiBold" Foreground="{Binding Priority, Converter={StaticResource ValueConverter}}">
 </TextBlock>

                  </DataTemplate>
            </my:DataGridTemplateColumn.CellTemplate>
</my:DataGridTemplateColumn>

如何使用绑定更改datagrid textblock列的前景

2 个答案:

ValueConverter.cs

XMAL：