利用DataGridView 的 RowPostPaint 事件 和 CellFormatting 事件 对行划线
要求:
1,选中行时,不改变行的背景色 ,在行的顶部和底部划线表示
2,当满足条件时,在行的中间划线
下面的例子简单实现这两个要求
/********************************************** * 作 者: DreamDays * * 说 明: DataGridViewDemo:行划线 * * 时 间：2012年05月01日 *********************************************/using System.Drawing;using System.Windows.Forms;namespace WinFormDataGridViewDemo{ public partial class Form1 : Form { public Form1() { InitializeComponent(); InitData(); } int pass = 450; //用来在行中间划线的画笔 Pen penMid = new Pen(Color.Red); //选中行时划线的画笔 Pen penSelected = new Pen(Color.White); private void dgvResult_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e) { Rectangle rec = e.RowBounds; int score = GetNumberByObject(dgvResult.Rows[e.RowIndex].Cells["colResult"].Value); if (!IsPass(score, pass)) {//不及格时 ,在行中间划线 Point pStart = new Point(rec.X, rec.Y + rec.Height / 2); Point pEnd = new Point(rec.X + rec.Width, rec.Y + rec.Height / 2); e.Graphics.DrawLine(penMid, pStart, pEnd); } if (this.dgvResult.CurrentRow.Index == e.RowIndex) {//选中行时划线 Point pTopStart = new Point(rec.X, rec.Y + 2); Point pTopEnd = new Point(rec.X + rec.Width, rec.Y + 2); Point pBottomStart = new Point(rec.X, rec.Y + rec.Height - 2); Point pBottomEnd = new Point(rec.X + rec.Width, rec.Y + rec.Height - 2); e.Graphics.DrawLine(penSelected, pTopStart, pTopEnd); e.Graphics.DrawLine(penSelected, pBottomStart, pBottomEnd); } } private void dgvResult_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) { if (this.dgvResult.CurrentRow.Index == e.RowIndex) {//选中行时不改变行底色 e.CellStyle.SelectionBackColor = e.CellStyle.BackColor; e.FormattingApplied = true; } } /// <summary> /// 添加几行数据 /// </summary> private void InitData() { this.dgvResult.Rows.Add(new string[] { "张三", "500" }); this.dgvResult.Rows.Add(new string[] { "李四", "451" }); this.dgvResult.Rows.Add(new string[] { "王五", "500" }); this.dgvResult.Rows.Add(new string[] { "马六", "449" }); this.dgvResult.Rows.Add(new string[] { "小明", "410" }); this.dgvResult.Rows.Add(new string[] { "小花", "550" }); this.dgvResult.Rows.Add(new string[] { "小强", "510" }); this.dgvResult.Rows.Add(new string[] { "小小", "500" }); this.dgvResult.Rows.Add(new string[] { "大牛", "440" }); this.dgvResult.Rows.Add(new string[] { "二虎", "450" }); } /// <summary> /// 判断是否达到及格线 /// </summary> /// <param name="score"></param> /// <param name="pass"></param> /// <returns></returns> private bool IsPass(int score, int pass) { return score >= pass; } /// <summary> /// 将object转换为int /// </summary> /// <param name="o"></param> /// <returns></returns> private int GetNumberByObject(object o) { if (o == null) { return 0; } int score = 0; int.TryParse(o.ToString(), out score); return score; } }}效果图如下:
不及格的行中间划线 ,选中的行用两条白线表示
TAG:WinForm
