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}）");}}}
}