C#开发WinForm中怎么根据条件改变DataGridView行颜色

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根据条件改变DataGridView行的颜色可以使用RowPrePaint事件。

示例程序界面如下：

示例程序代码如下：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;using System.Configuration;using System.Data.SqlClient;namespace DgvChangeColor{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        string strCon = ConfigurationManager.ConnectionStrings["DbConnection"].ConnectionString;        private void Form1_Load(object sender, EventArgs e)        {            DataTable dt = GetDataSource();            this.DgvColor.DataSource = dt;        }        private void DgvColor_RowPrePaint(object sender, DataGridViewRowPrePaintEventArgs e)        {            if (e.RowIndex >= DgvColor.Rows.Count - 1)            {                return;            }            DataGridViewRow dr = (sender as DataGridView).Rows[e.RowIndex];            if (dr.Cells["项目代码"].Value.ToString().Trim().Equals("ACAC0001"))            {                // 设置单元格的背景色                dr.DefaultCellStyle.BackColor = Color.Yellow;                // 设置单元格的前景色                dr.DefaultCellStyle.ForeColor = Color.Black;            }            else            {                dr.DefaultCellStyle.BackColor = Color.Blue;                dr.DefaultCellStyle.ForeColor = Color.White;            }        }        private DataTable GetDataSource()        {            DataTable dt = new DataTable();            SqlConnection conn = new SqlConnection(strCon);            string strSQL = "SELECT XIANGMUCDDM AS '项目代码',XIANGMUMC AS '项目名称', DANJIA AS '单价',SHULIANG AS '数量' FROM InPatientBillDt WHERE 就诊ID='225600'";            SqlCommand cmd = new SqlCommand(strSQL, conn);            SqlDataAdapter adapter = new SqlDataAdapter();            adapter.SelectCommand = cmd;            try            {                conn.Open();                adapter.Fill(dt);            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }            finally            {                conn.Close();            }            return dt;        }    }}

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