学步园

隐藏空白列：

dataGridView1.RowHeadersVisible = false;

设置空白列的宽度不可改变：

 this.dgv.RowHeadersWidthSizeMode = System.Windows.Forms.DataGridViewRowHeadersWidthSizeMode.DisableResizing;

在空白列显示行数的方法：

       private void dgv_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
        {
            //#region 方法一
            //using (SolidBrush b = new SolidBrush(dgv.RowHeadersDefaultCellStyle.ForeColor))
            //{
            //    int linen = 0;
            //    linen = e.RowIndex + 1;
            //    string line = linen.ToString();
            //    e.Graphics.DrawString(line, e.InheritedRowStyle.Font, b, e.RowBounds.Location.X, e.RowBounds.Location.Y + 5);
            //    SolidBrush B = new SolidBrush(Color.Red);
            //}
            //#endregion
            #region 方法二
            Rectangle rectangle = new Rectangle(e.RowBounds.Location.X, e.RowBounds.Location.Y, dgv.RowHeadersWidth - 4, e.RowBounds.Height);
            TextRenderer.DrawText(
                e.Graphics, (e.RowIndex + 1).ToString(),
                dgv.RowHeadersDefaultCellStyle.Font,
                rectangle,
                dgv.RowHeadersDefaultCellStyle.ForeColor,
                TextFormatFlags.VerticalCenter | TextFormatFlags.HorizontalCenter
                );
            #endregion
        }

如果你是使用Table绑定的Gridview建议使得如下方法：

  //实现功能  DataGridView  添加 自动编号   
            DataTable table =new DataTable();


            DataColumn column = new DataColumn();
            column.AutoIncrement = true;    //AutoIncrement  获取或设置一个值，该值指示对于添加到该表中的新行，列是否将列的值自动递增  
            column.ColumnName = "自动编号";
            column.AutoIncrementSeed = 1;
            column.AutoIncrementStep = 1;
            table.Columns.Add(column);
            table.Merge(table);//Merge合并DataTable  
            this.dataGridView1.DataSource = table;