첨부 실행 코드는 나눔고딕코딩 폰트를 사용합니다.
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TestProject.zip
다운로드

▶ IntegerToLinearGradientBrushValueConverter.cs

using System;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Media;

namespace TestProject
{
    /// <summary>
    /// 정수→선형 그라디언트 브러시 값 변환자
    /// </summary>
    public class IntegerToLinearGradientBrushValueConverter : IValueConverter
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - IntegerToLinearGradientBrushValueConverter()

        /// <summary>
        /// 생성자
        /// </summary>
        public IntegerToLinearGradientBrushValueConverter()
        {
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 변환하기 - Convert(value, targetType, parameter, cultureInfo)

        /// <summary>
        /// 변환하기
        /// </summary>
        /// <param name="value">값</param>
        /// <param name="targetType">타겟 타입</param>
        /// <param name="parameter">매개 변수</param>
        /// <param name="cultureInfo">CultureInfo 객체</param>
        /// <returns>변환 값</returns>
        public object Convert(object value, Type targetType, object parameter, CultureInfo cultureInfo)
        {
            if(value == null)
            {
                return Brushes.Transparent;
            }

            if(value.GetType() != typeof(int))
            {
                return Brushes.Transparent;
            }

            if(value == null || (int)value >= 20)
            {
                return Brushes.White;
            }

            return new LinearGradientBrush(Color.FromArgb(100, 255, 0, 0), Color.FromArgb(0, 255, 0, 0), 0);
        }

        #endregion
        #region 역변환하기 - ConvertBack(value, targetType, parameter, cultureInfo)

        /// <summary>
        /// 역변환하기
        /// </summary>
        /// <param name="value">값</param>
        /// <param name="targetType">타겟 타입</param>
        /// <param name="parameter">매개 변수</param>
        /// <param name="cultureInfo">CultureInfo 객체</param>
        /// <returns>역변환 값</returns>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo cultureInfo)
        {
            throw new NotImplementedException();
        }

        #endregion
    }
}

 

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▶ MainWindow.xaml

<Window x:Class="TestProject.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
    xmlns:dxgt="http://schemas.devexpress.com/winfx/2008/xaml/grid/themekeys"
    xmlns:local="clr-namespace:TestProject"
    Width="800"
    Height="600"
    Title="GridControl 클래스 : 조건부 스타일 적용하기"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid>
        <Grid.Resources>
            <local:IntegerToLinearGradientBrushValueConverter x:Key="IntegerToLinearGradientBrushValueConverterKey" />
            <Style x:Key="CellStyleKey"
                BasedOn="{StaticResource {dxgt:GridRowThemeKey ResourceKey=CellStyle}}"
                TargetType="dxg:CellContentPresenter">
                <Setter
                    Property="Background"
                    Value="{Binding Path=RowData.Row.OrderUnit, Converter={StaticResource IntegerToLinearGradientBrushValueConverterKey}}" />
            </Style>
        </Grid.Resources>
        <dxg:GridControl x:Name="gridControl">
            <dxg:GridControl.Columns>
                <dxg:GridColumn
                    FieldName="ProductName"
                    Header="Product"
                    CellStyle="{StaticResource CellStyleKey}" />
                <dxg:GridColumn
                    FieldName="UnitPrice"
                    Header="Unit Price" />
                <dxg:GridColumn
                    FieldName="OrderUnit"
                    Header="Units On Order" />
            </dxg:GridControl.Columns>
            <dxg:GridControl.View>
                <dxg:TableView />
            </dxg:GridControl.View>
        </dxg:GridControl>
    </Grid>
</Window>

 

▶ MainWindow.xaml.cs

using System.Windows;

namespace TestProject
{
    /// <summary>
    /// 메인 윈도우
    /// </summary>
    public partial class MainWindow : Window
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainWindow()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainWindow()
        {
            InitializeComponent();

            this.gridControl.ItemsSource = new ProductList().GetData();
        }

        #endregion
    }
}
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