按条件改变datagridview的单元格样式

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

 

namespace WindowsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

 

        private void Form1_Load(object sender, EventArgs e)

        {

            //建立表数据

            DataTable dt = new DataTable("测试表");

 

            dt.Columns.Add(new DataColumn ("姓名", System.Type.GetType("System.String")));

           

            dt.Columns.Add(new DataColumn ("日期",System .Type .GetType ("System.DateTime")));

               

            DataRow dr= dt.NewRow();

            dr["姓名"]="甲";

            dr["日期"]="2009-1-1";

            dt.Rows.Add(dr);

           

              DataRow dr1= dt.NewRow();

            dr1["姓名"]="乙";

            dr1["日期"]="2009-1-2";

            dt.Rows.Add(dr1);

           

              DataRow dr2= dt.NewRow();

            dr2["姓名"]="丙";

            dr2["日期"]="2009-1-3";

            dt.Rows.Add(dr2);

 

            dgv.DataSource = dt;

 

            //调用构造函数

            setColor();

 

        }

        private void setColor()

        {

            for (int i = 0; i < dgv.Rows.Count - 1; i++)//循环每一行

            {

                if (Convert.ToDateTime( dgv.Rows[i].Cells["日期"].Value)  < Convert .ToDateTime ("2009-1-1"))//条件判断

                {

                    for (int j = 0; j < dgv.Columns.Count  ; j++)

                    {

                        dgv.Rows[i].Cells[j].Style.ForeColor = Color.Red;//改变前景颜色

                       

                    }

                    }

            }

        }

    }

}