WPF之DataGrid控件根据某列的值设置行的前景色(色

一种方法是 使用 datagrid的LoadingRow事件：

  private void DataGrid_LoadingRow(object sender, DataGridRowEventArgs e)
        {
            Employee model = e.Row.Item as Employee;
            if (model!=null)
            {
                if (model.Age<21)
                {
                    e.Row.Foreground = new SolidColorBrush(Colors.Blue);
                }
            }
        }

这种方法的缺点是只有在加载数据或新增数据时才起效果。

第二种方法就是用 行的样式(RowStyle)+转换器：

转换器类：

 //定义值转换器
    [ValueConversion(typeof(int), typeof(Brush))]
    public class IntToBrushConvert : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            int reValue = System.Convert.ToInt32(value);
            if (reValue == 1)
            {
                return new SolidColorBrush(Colors.Red);
            }
            else
            {
                return new SolidColorBrush(Colors.Black);
            }

        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string strValue = value.ToString();
            return value;
        }


    }

声明转换器类：

    <Window.Resources>
        <local:IntToBrushConvert x:Key="IntToBrushConvert"/>
    </Window.Resources>

DataGrid的行样式已经绑定转换器：

<DataGrid HeadersVisibility="Column" ItemsSource="{Binding Path=Employees}"  
                        SelectedItem="{Binding Path=SelectedEmployee}" CanUserAddRows="False" IsReadOnly="True"
                        AutoGenerateColumns="False">
            <DataGrid.RowStyle>
                <Style TargetType="DataGridRow">
                    <Setter Property="Foreground" 
        Value="{Binding Path=Flag,Converter={StaticResource ResourceKey=IntToBrushConvert}}"></Setter>
                </Style>
            </DataGrid.RowStyle>
            <DataGrid.Columns>
                <DataGridTextColumn  Header="工号" Binding="{Binding Path=EmployeeNum}" />
                <DataGridTextColumn  Header="名称" Binding="{Binding Path=EmployeeName}" />
                <DataGridTextColumn  Header="职位" Binding="{Binding Path=Title}" />
                <DataGridTextColumn  Header="年龄" Binding="{Binding Path=Age}" />
                <DataGridTextColumn  Header="状态" Binding="{Binding Path=Status,Converter={StaticResource ResourceKey=IntToStringConvert}}"/>
            </DataGrid.Columns>
        </DataGrid>

当Age属性大于22时，把Flag属性赋值为1：

 private int m_age;
        /// <summary>
        /// 年龄
        /// </summary>
        public int Age
        {
            get { return m_age; }
            set
            {
                if (value != m_age)
                {
                    m_age = value;
                    if (m_age > 22)
                    {
                        Flag = 1;
                    }
                    else
                    {
                        Flag = 0;
                    }
                    OnPropertyChanged("Age");
                }
            }
        }

运行截图：