DataGridView 显示行号与背景颜色

实现的方式有好几种。之前使用的是下面这种在RowPostPaint事件中实现，效率不高。每次改变控件尺寸时都会执行

private void MsgGridView_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
{
DataGridView gdView = sender as DataGridView;
System.Drawing.Rectangle rectangle = new System.Drawing.Rectangle(e.RowBounds.Location.X,
e.RowBounds.Location.Y,
gdView.RowHeadersWidth - 4,
e.RowBounds.Height);

TextRenderer.DrawText(e.Graphics, (e.RowIndex + 1).ToString(),
gdView.RowHeadersDefaultCellStyle.Font,
rectangle,
gdView.RowHeadersDefaultCellStyle.ForeColor,
TextFormatFlags.VerticalCenter | TextFormatFlags.Right);
}

为了消除更新所带来的的闪屏问题，需要开启窗体和控件的双缓存，在窗体的构造函数中插入下面的代码。

private IGForm()
{
    //设置窗体的双缓冲
    this.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.AllPaintingInWmPaint, true);
    this.UpdateStyles();

InitializeComponent();
    //
    //利用反射设置DataGridView的双缓冲
    Type dgvType = this.MsgGridView.GetType();
    PropertyInfo pi = dgvType.GetProperty("DoubleBuffered",
    BindingFlags.Instance | BindingFlags.NonPublic);
    pi.SetValue(this.MsgGridView, true, null);
}

===========================================

显示DataGridView背景颜色

//单元格样式的BackColor方法设置背景色
DataGridView.RowsDefaultCellStyle.BackColor = Color.LightSteelBlue;
//奇数行样式的BackColor方法设置
DataGridView.AlternatingRowsDefaultCellStyle.BackColor = Color.LightSteelBlue;

整合一下，封装到一个类中，方便调用

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

namespace SimpleDataGridView
{
    /// <summary>
    /// 设置DataGridView的样式
    /// </summary>
    public class DataGridViewStyle
    {
        /// <summary>
        /// 普通的样式
        /// </summary>
        public void DgvStyle1(DataGridView dgv)
        {
            //奇数行的背景色
            dgv.AlternatingRowsDefaultCellStyle.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(255)))), ((int)(((byte)(255)))));
            dgv.AlternatingRowsDefaultCellStyle.SelectionForeColor = System.Drawing.Color.Blue;
            dgv.AlternatingRowsDefaultCellStyle.SelectionBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(128)))), ((int)(((byte)(255)))));
            dgv.ColumnHeadersDefaultCellStyle.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            //默认的行样式
            dgv.RowsDefaultCellStyle.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(255)))), ((int)(((byte)(192)))));
            dgv.RowsDefaultCellStyle.SelectionBackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(128)))), ((int)(((byte)(255)))));
            dgv.RowsDefaultCellStyle.SelectionForeColor = System.Drawing.Color.Blue;
            //数据网格颜色
            dgv.GridColor = System.Drawing.Color.FromArgb(((int)(((byte)(0)))), ((int)(((byte)(0)))), ((int)(((byte)(192)))));
            //列标题的宽度
            dgv.ColumnHeadersHeight = 28;
        }
        /// <summary>
        /// 凹凸样式
        /// </summary>
        /// 需要手动设置this.RowTemplate.DividerHeight = 2;
        public void DgvStyle2(DataGridView dgv)
        {
            dgv.CellBorderStyle = System.Windows.Forms.DataGridViewCellBorderStyle.Sunken;
            //列标题的边框样式
            dgv.ColumnHeadersBorderStyle = System.Windows.Forms.DataGridViewHeaderBorderStyle.Sunken;
            dgv.ColumnHeadersDefaultCellStyle.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            dgv.ColumnHeadersDefaultCellStyle.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(128)))), ((int)(((byte)(255)))), ((int)(((byte)(255)))));
            dgv.ColumnHeadersHeight = 28;
            //行的边框样式
            dgv.RowHeadersBorderStyle = System.Windows.Forms.DataGridViewHeaderBorderStyle.Sunken;
            dgv.DefaultCellStyle.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
                    dgv.RowTemplate.DividerHeight = 1;
            //禁止当前默认的视觉样式
            dgv.EnableHeadersVisualStyles = false;
        }

        /// <summary>
        /// 给DataGridView添加行号
        /// </summary>
        /// <param name="dgv"></param>
        /// <param name="e"></param>
        public static void DgvRowPostPaint(DataGridView dgv, DataGridViewRowPostPaintEventArgs e)
        {
            try
            {
                //添加行号
                SolidBrush v_SolidBrush = new SolidBrush(dgv.RowHeadersDefaultCellStyle.ForeColor);
                int v_LineNo = 0;
                v_LineNo = e.RowIndex + 1;
                string v_Line = v_LineNo.ToString();
                e.Graphics.DrawString(v_Line, e.InheritedRowStyle.Font, v_SolidBrush, e.RowBounds.Location.X + 15, e.RowBounds.Location.Y + 5);
            }
            catch (Exception ex)
            {
                MessageBox.Show("添加行号时发生错误，错误信息：" + ex.Message, "操作失败");
            }
        }

    }
}