29WxOrder/29WxOrder/MyControl/DGVHeaderMouseEnterHelper.cs

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

namespace _29WxOrder.MyControl
{
    public class DGVHeaderMouseEnterHelper
    {
        public DGVHeaderMouseEnterHelper(DataGridView gridview)
        {
            gridview.CellPainting += new DataGridViewCellPaintingEventHandler(gridview_CellPainting);
        }

        int top = 0;
        int left = 0;
        int height = 0;
        int width1 = 0;

        public void gridview_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
        {
            #region 重绘datagridview表头
            DataGridView dgv = (DataGridView)(sender);
            if (e.RowIndex != -1) return;
            if (e.ColumnIndex == 12 && e.RowIndex == -1)
            {
                using (Pen gridLinePen = new Pen(ColorTranslator.FromHtml("#CBD2DA"))) //画笔颜色
                {
                    //e.Graphics.DrawLine(gridLinePen, left, top, left + width, top);
                    //e.Graphics.DrawLine(gridLinePen, left, top + height / 2, left + width, top + height / 2);
                    //e.Graphics.DrawLine(gridLinePen, left, top + height - 1, left + width, top + height - 1); //自定义区域下部横线
                    width1 = 0;
                    e.Graphics.DrawLine(gridLinePen, left - 1, top, left - 1, top + height - 2);


                }
                e.Handled = true;
            }
            if (e.ColumnIndex == 11 && e.RowIndex == -1)
            {
                using (Pen gridLinePen = new Pen(ColorTranslator.FromHtml("#CBD2DA"))) //画笔颜色
                {
                    //e.Graphics.DrawLine(gridLinePen, left, top, left + width, top);
                    //e.Graphics.DrawLine(gridLinePen, left, top + height / 2, left + width, top + height / 2);
                    //e.Graphics.DrawLine(gridLinePen, left, top + height - 1, left + width, top + height - 1); //自定义区域下部横线
                    width1 = 0;
                    e.Graphics.DrawLine(gridLinePen, left + dgv.Columns[10].Width , top, left + dgv.Columns[10].Width , top + height - 2);


                }
                e.Handled = true;
            }
              
            #endregion
        }
        private List<TopHeader> _headers = new List<TopHeader>();
        public List<TopHeader> Headers
        {
            get { return _headers; }
        }

        public struct TopHeader
        {
            public TopHeader(int index, int span, string text)
            {
                this.Index = index;
                this.Span = span;
                this.Text = text;
            }
            public int Index;
            public int Span;
            public string Text;
        }
    }
}