Winfrom DateGridView 实现Button列禁用

Form窗体如下所示：

实现如下：

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

namespace DataGridView添加禁用Button列
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public List<User> GetAllUser()
        {
            List<User> UserList = new List<User>();

            User u = new User();
            u.UserID = Guid.NewGuid().ToString().Replace("-", "");
            u.UserName = "张三丰";
            u.UserType = 0;
            UserList.Add(u);
            
            User u1 = new User();
            u1.UserID = Guid.NewGuid().ToString().Replace("-", "");
            u1.UserName = "周芷若";
            u1.UserType = 1;
            UserList.Add(u1);

            User u2 = new User();
            u2.UserID = Guid.NewGuid().ToString().Replace("-", "");
            u2.UserName = "赵敏";
            u2.UserType = 1;
            UserList.Add(u2);

            User u3 = new User();
            u3.UserID = Guid.NewGuid().ToString().Replace("-", "");
            u3.UserName = "张无忌";
            u3.UserType = 0;
            UserList.Add(u3);

            return UserList;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.dgvUser.AutoGenerateColumns = false;

            List<User> UserList = GetAllUser();
            this.dgvUser.DataSource = UserList;

            string num = string.Empty;
            int count = this.dgvUser.Rows.Count;
            for (int i = 0; i < count; i++)
            {
                num = this.dgvUser.Rows[i].Cells["UserType"].FormattedValue.ToString();
                DataGridViewDisableButtonCell btnCell = (DataGridViewDisableButtonCell)
                      this.dgvUser.Rows[i].Cells["UserStatus"];
                if (num.Equals("0"))
                {
                    btnCell.Enabled = false;
                }
                else btnCell.Enabled = true;
            }
        }

        private void dgvUser_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.RowIndex == -1) return;
            string colName = this.dgvUser.Columns[e.ColumnIndex].Name;
            if (colName.Equals("UserStatus")) //设置
            {
                DataGridViewDisableButtonCell btnCell = (DataGridViewDisableButtonCell)
                    this.dgvUser.CurrentRow.Cells["UserStatus"];
                if (!btnCell.Enabled) return;

                MessageBox.Show("Test");
            }
        }
    }

    public class DataGridViewDisableButtonColumn : DataGridViewButtonColumn
    {
        public DataGridViewDisableButtonColumn()
        {
            this.CellTemplate = new DataGridViewDisableButtonCell();
        }
    }

    public class DataGridViewDisableButtonCell : DataGridViewButtonCell
    {
        private bool enabledValue;
        public bool Enabled
        {
            get
            {
                return enabledValue;
            }
            set
            {
                enabledValue = value;
            }
        }

        public override object Clone()
        {
            DataGridViewDisableButtonCell cell =
                (DataGridViewDisableButtonCell)base.Clone();
            cell.Enabled = this.Enabled;
            return cell;
        }

        public DataGridViewDisableButtonCell()
        {
            this.enabledValue = true;
        }

        protected override void Paint(Graphics graphics,
            Rectangle clipBounds, Rectangle cellBounds, int rowIndex,
            DataGridViewElementStates elementState, object value,
            object formattedValue, string errorText,
            DataGridViewCellStyle cellStyle,
            DataGridViewAdvancedBorderStyle advancedBorderStyle,
            DataGridViewPaintParts paintParts)
        {
            if (rowIndex != -1)
            {
                if (!this.enabledValue)
                {
                    if ((paintParts & DataGridViewPaintParts.Background) ==
                        DataGridViewPaintParts.Background)
                    {
                        SolidBrush cellBackground = new SolidBrush(cellStyle.BackColor);
                        graphics.FillRectangle(cellBackground, cellBounds);
                        cellBackground.Dispose();
                    }

                    if ((paintParts & DataGridViewPaintParts.Border) ==
                        DataGridViewPaintParts.Border)
                    {
                        PaintBorder(graphics, clipBounds, cellBounds, cellStyle, advancedBorderStyle);
                    }
                    Rectangle buttonArea = cellBounds;
                    Rectangle buttonAdjustment =
                        this.BorderWidths(advancedBorderStyle);
                    buttonArea.X += buttonAdjustment.X;
                    buttonArea.Y += buttonAdjustment.Y;
                    buttonArea.Height -= buttonAdjustment.Height;
                    buttonArea.Width -= buttonAdjustment.Width;
                    ButtonRenderer.DrawButton(graphics, buttonArea,
                        System.Windows.Forms.VisualStyles.PushButtonState.Disabled);

                    if (this.FormattedValue is String)
                    {
                        TextRenderer.DrawText(graphics, (string)this.FormattedValue,
                            this.DataGridView.Font, buttonArea, SystemColors.GrayText);
                    }
                }
                else
                {
                    base.Paint(graphics, clipBounds, cellBounds, rowIndex,
                        elementState, value, formattedValue, errorText,
                        cellStyle, advancedBorderStyle, paintParts);
                }
            }
        }
    }
}