c#datagridview小票打印单据存储

foreach (DataColumn column in dt.Columns) { switch (column.ColumnName) { case "商品名称DataGridViewTextBoxColumn": case "单位DataGridViewTextBoxColumn": break; default: continue; } e.Graphics.DrawString(column.ColumnName, ff, Brushes.Black, x, y); x += kuan; } y += gao; x = 30; for (int i = 0; i < dt.Rows.Count; i++) { for (int j = 0; j <= 3; j++) { e.Graphics.DrawString((string)dt.Rows[i].ItemArray[j].ToString(), ff, Brushes.Black, x, y); x += kuan; } x = 30; y += gao; }