winfrom 操作列 动态按钮

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        // 绑定事件
        this.dataGridView1.CellPainting += DataGridView1_CellPainting;
        this.dataGridView1.CellClick += DataGridView1_CellClick;
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        // 添加三列
        dataGridView1.Columns.Add("first", "First");
        dataGridView1.Columns.Add("second", "Second");
        dataGridView1.Columns.Add("third", "操作"); // 这一列我们将自绘按钮

        dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;

        // 添加15行示例数据
        for (int i = 0; i < 15; i++)
        {
            string first = $"Row{i}";
            string second = i % 2 == 0 ? "Even" : "Odd";
            dataGridView1.Rows.Add(first, second, ""); // 第三列留空，由我们绘制
        }

        // 设置第三列不可编辑、居中等
        var opCol = dataGridView1.Columns["third"];
        opCol.ReadOnly = true;
        opCol.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
    }

    // 判断某行是否应显示操作按钮
    private bool ShouldShowButtonsInRow(int rowIndex)
    {
        if (rowIndex < 0 || rowIndex >= dataGridView1.Rows.Count) return false;
        var cellValue = dataGridView1.Rows[rowIndex].Cells["second"].Value?.ToString();
        return cellValue == "Even"; // 示例条件：第二列为 "Even"
    }

    // 定义操作列的左右边距（可调整）
    private const int OperationColumnPaddingLeft = 6;

    private const int OperationColumnPaddingRight = 6;

    private const int OperationColumnPaddingTop = 3;

    private const int OperationColumnPaddingBottom = 3;
    private const int ButtonSpacing = 10; // 按钮间的间距

    // 绘制虚拟按钮（带左右空白和按钮间间距）
    private void DataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
    {
        if (e.ColumnIndex == dataGridView1.Columns["third"].Index && e.RowIndex >= 0)
        {
            e.PaintBackground(e.ClipBounds, true);

            if (!ShouldShowButtonsInRow(e.RowIndex))
            {
                e.Handled = true;
                return;
            }

            Rectangle cellRect = e.CellBounds;

            // 计算总可用宽度（减去左右边距和按钮间间距）
            int usableWidth = cellRect.Width - OperationColumnPaddingLeft - OperationColumnPaddingRight - ButtonSpacing;

            // 计算单个按钮的实际宽度
            int btnWidth = usableWidth / 2;

            Rectangle btn1Rect = new Rectangle(
                cellRect.Left + OperationColumnPaddingLeft,
                cellRect.Top + OperationColumnPaddingTop,
                btnWidth,
                cellRect.Height - OperationColumnPaddingTop - OperationColumnPaddingBottom
            );

            Rectangle btn2Rect = new Rectangle(
                cellRect.Left + OperationColumnPaddingLeft + btnWidth + ButtonSpacing,
                cellRect.Top + OperationColumnPaddingTop,
                btnWidth,
                cellRect.Height - OperationColumnPaddingTop - OperationColumnPaddingBottom
            );

            using (SolidBrush brush = new SolidBrush(SystemColors.Control))
            using (Pen pen = new Pen(SystemColors.ControlDark))
            {
                e.Graphics.FillRectangle(brush, btn1Rect);
                e.Graphics.DrawRectangle(pen, btn1Rect.X, btn1Rect.Y, btn1Rect.Width - 1, btn1Rect.Height - 1);

                e.Graphics.FillRectangle(brush, btn2Rect);
                e.Graphics.DrawRectangle(pen, btn2Rect.X, btn2Rect.Y, btn2Rect.Width - 1, btn2Rect.Height - 1);
            }

            TextRenderer.DrawText(e.Graphics, "操作1", dataGridView1.Font, btn1Rect, SystemColors.ControlText,
                TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter | TextFormatFlags.EndEllipsis);

            TextRenderer.DrawText(e.Graphics, "操作2", dataGridView1.Font, btn2Rect, SystemColors.ControlText,
                TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter | TextFormatFlags.EndEllipsis);

            e.Handled = true;
        }
    }

    // 处理点击（同样应用相同边距和间距）
    private void DataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
    {
        if (e.ColumnIndex == dataGridView1.Columns["third"].Index && e.RowIndex >= 0)
        {
            if (!ShouldShowButtonsInRow(e.RowIndex)) return;

            DataGridView dgv = sender as DataGridView;
            Rectangle cellRect = dgv.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, false);

            int usableWidth = cellRect.Width - OperationColumnPaddingLeft - OperationColumnPaddingRight - ButtonSpacing;
            int btnWidth = usableWidth / 2;

            Rectangle btn1Rect = new Rectangle(
                cellRect.Left + OperationColumnPaddingLeft,
                cellRect.Top + OperationColumnPaddingTop,
                btnWidth,
                cellRect.Height - OperationColumnPaddingTop - OperationColumnPaddingBottom
            );

            Rectangle btn2Rect = new Rectangle(
                cellRect.Left + OperationColumnPaddingLeft + btnWidth + ButtonSpacing,
                cellRect.Top + OperationColumnPaddingTop,
                btnWidth,
                cellRect.Height - OperationColumnPaddingTop - OperationColumnPaddingBottom
            );

            Point clickPoint = dgv.PointToClient(Cursor.Position);

            if (btn1Rect.Contains(clickPoint))
            {
                MessageBox.Show($"操作1 被点击（行 {e.RowIndex}）");
            }
            else if (btn2Rect.Contains(clickPoint))
            {
                MessageBox.Show($"操作2 被点击（行 {e.RowIndex}）");
            }
        }
    }
}