以下为代码的内容：

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

namespace KPIDisplayer
{
    internal class DataGridViewStatusColumn : DataGridViewImageColumn
    {
        public DataGridViewStatusColumn()
        {
            CellTemplate = new DataGridViewStatusCell();
        }
    }
}

以下为代码的内容：

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.ComponentModel;
using System.Reflection;

namespace KPIDisplayer
{
    internal class DataGridViewTrendCell : DataGridViewImageCell
    {
        public DataGridViewTrendCell()
        {
        }

        protected override object GetFormattedValue(object value, int rowIndex, ref DataGridViewCellStyle cellStyle, TypeConverter valueTypeConverter, TypeConverter formattedValueTypeConverter, DataGridViewDataErrorContexts context)
        {
            string trendgraph = value.ToString().Split(',')[0];
            double trend = Double.Parse(value.ToString().Split(',')[1]);

            if (trendgraph== TrendGraph.StandardArrow)
            {
                if (trend == -1)
                {
                    return Properties.Resources.Arrow_XP0;
                }
                else if (trend == -0.5)
                {
                    return Properties.Resources.Arrow_XP1;
                }
                else if (trend == 0)
                {
                    return Properties.Resources.Arrow_XP2;
                }
                else if (trend == 0.5)
                {
                    return Properties.Resources.Arrow_XP3;
                }
                else if (trend == 1)
                {
                    return Properties.Resources.Arrow_XP4;
                }
                else
                {
                    return Properties.Resources.empty;
                }
            }
            else if (trendgraph == TrendGraph.StatusArrowAscending)
            {
                if (trend == -1)
                {
                    return Properties.Resources.Arrow_Status_Asc0;
                }
                else if (trend == -0.5)
                {
                    return Properties.Resources.Arrow_Status_Asc1;
                }
                else if (trend == 0)
                {
                    return Properties.Resources.Arrow_Status_Asc2;
                }
                else if (trend == 0.5)
                {
                    return Properties.Resources.Arrow_Status_Asc3;
                }
                else if (trend == 1)
                {
                    return Properties.Resources.Arrow_Status_Asc4;
                }
                else
                {
                    return Properties.Resources.empty;
                }
            }
            else if (trendgraph == TrendGraph.StatusArrowDescending)
            {
                if (trend == -1)
                {
                    return Properties.Resources.Arrow_Status_Desc0;
                }
                else if (trend == -0.5)
                {
                    return Properties.Resources.Arrow_Status_Desc1;
                }
                else if (trend == 0)
                {
                    return Properties.Resources.Arrow_Status_Desc2;
                }
                else if (trend == 0.5)
                {
                    return Properties.Resources.Arrow_Status_Desc3;
                }
                else if (trend == 1)
                {
                    return Properties.Resources.Arrow_Status_Desc4;
                }
                else
                {
                    return Properties.Resources.empty;
                }
            }
            else if (trendgraph == TrendGraph.SmileyFace)
            {
                if (trend == -1)
                {
                    return Properties.Resources.Smiley0;
                }
                else if (trend == 0)
                {
                    return Properties.Resources.Smiley1;
                }
                else if (trend == 1)
                {
                    return Properties.Resources.Smiley2;
                }
                else
                {
                    return Properties.Resources.empty;
                }
            }
            else
            {
                return Properties.Resources.empty;
            }
           
        }      
    }
}