NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
////创建一个工作薄 sheet
ISheet sheet1 = book.CreateSheet("Sheet1");
// 创建数据行 0代表是在第几行创建 变量 给sheet1添加第一行的头部标题
IRow row1 = sheet1.CreateRow(0);
//设置第一行的高度 【Height的单位是1/20个点】，所以Height的值永远是HeightInPoints【HeightInPoints的单位是点】的20倍
row1.Height = 25 * 20;
var font = book.CreateFont();//创建字体
font.Boldweight = (short)FontBoldWeight.Bold;
//font.FontHeightInPoints = 18;//字体大
font.Color = (short)HSSFColor.White.Index;
ICellStyle cellStyle = book.CreateCellStyle();//创建样式
cellStyle.SetFont(font);
cellStyle.Alignment = HorizontalAlignment.Center;
cellStyle.VerticalAlignment = VerticalAlignment.Center;
cellStyle.WrapText = true;//自动换行
cellStyle.FillPattern = FillPattern.SolidForeground;//填充的模式，可以是网格、花式等。如果需要填充单色，请使用：SOLID_FOREGROUND
cellStyle.FillForegroundColor = HSSFColor.CornflowerBlue.Index; //背景色
cellStyle.BorderLeft = BorderStyle.Thin;
cellStyle.LeftBorderColor = (short)HSSFColor.White.Index;
cellStyle.BorderRight = BorderStyle.Thin;
cellStyle.RightBorderColor = (short)HSSFColor.White.Index;
cellStyle.BorderTop = BorderStyle.Thin;
cellStyle.TopBorderColor = (short)HSSFColor.White.Index;
cellStyle.BorderBottom = BorderStyle.Thin;
cellStyle.BottomBorderColor = (short)HSSFColor.White.Index;
////创建单元格 并且赋值
row1.CreateCell(0).SetCellValue("订单号");
row1.CreateCell(1).SetCellValue("分类");
row1.CreateCell(2).SetCellValue("用户编号");
row1.CreateCell(3).SetCellValue("账户");
row1.CreateCell(4).SetCellValue("收入/支出");
row1.CreateCell(5).SetCellValue("交易前金额");
row1.CreateCell(6).SetCellValue("交易余额");
row1.CreateCell(7).SetCellValue("交易后金额");
row1.CreateCell(8).SetCellValue("交易类型");
row1.CreateCell(9).SetCellValue("交易时间");
row1.CreateCell(10).SetCellValue("交易说明");
for (int j = 0; j < 11; j++)
{
//headerRow.Cells[i].CellStyle;
row1.GetCell(j).CellStyle = cellStyle;
}
//将数据逐步写入sheet1各个行
int i = 0;
foreach (var item in collection.FundDetailList)
{
i++;
NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i);
rowtemp.CreateCell(0).SetCellValue(item.OrderId);
rowtemp.CreateCell(1).SetCellValue(item.Category);
rowtemp.CreateCell(2).SetCellValue(item.UserId);
rowtemp.CreateCell(3).SetCellValue(item.AccountType.ToString().Equals("Bonus", StringComparison.OrdinalIgnoreCase) ? "奖金账户" : item.AccountType.ToString().Equals("FillMoney", StringComparison.OrdinalIgnoreCase) ? "充值账户" : item.AccountType.ToString().Equals("Freeze", StringComparison.OrdinalIgnoreCase) ? "冻结账户" : string.Empty);
rowtemp.CreateCell(4).SetCellValue(item.PayType.ToString().Equals("Payin", StringComparison.OrdinalIgnoreCase) ? "收入" : item.PayType.ToString().Equals("Payout", StringComparison.OrdinalIgnoreCase) ? "支出" : string.Empty);
rowtemp.CreateCell(5).SetCellValue(item.BeforeBalance.ToString("N2"));
rowtemp.CreateCell(6).SetCellValue(item.PayMoney.ToString("N2"));
rowtemp.CreateCell(7).SetCellValue(item.AfterBalance.ToString("N2"));
rowtemp.CreateCell(8).SetCellValue(item.AiOrderId);
rowtemp.CreateCell(9).SetCellValue(item.CreateTime.ToString("yyyy-MM-dd HH:mm:ss"));
rowtemp.CreateCell(10).SetCellValue(item.Summary);
}
for (int j = 0; j < 11; j++)
{
//自动调整列的宽度
sheet1.AutoSizeColumn(j);
int columnWidth = sheet1.GetColumnWidth(j) / 256;
for (int rowNum = 1; rowNum <= sheet1.LastRowNum; rowNum++)
{
IRow currentRow = sheet1.GetRow(rowNum);
if (currentRow.GetCell(j) != null)
{
ICell currentCell = currentRow.GetCell(j);
int length = Encoding.UTF8.GetBytes(currentCell.ToString()).Length;
if (columnWidth < length + 3)
{
columnWidth = length + 3;
}
}
}
sheet1.SetColumnWidth(i, columnWidth * 256);
}
}
// 写入到客户端
System.IO.MemoryStream ms = new System.IO.MemoryStream();
book.Write(ms);
ms.Seek(0, SeekOrigin.Begin);
return File(ms, "application/vnd.ms-excel", string.Format("{0}.xls", DateTime.Now.ToString("yyyy-MM-dd")));实例：
//列宽自适应，只对英文和数字有效 maxColunm为最大列数
for (int i = 0; i <= maxColumn; i++)
{
sheet.AutoSizeColumn(i);
}
，然后对比本列的长度，取最大值
for (int columnNum = 0; columnNum <= maxColumn; columnNum++)
{
//获取当前列的宽度
int columnWidth = sheet.GetColumnWidth(columnNum) / 256;
for (int rowNum = 1; rowNum <= sheet.LastRowNum; rowNum++)
{
IRow currentRow = sheet.GetRow(rowNum);
if(currentRow.GetCell(columnNum) != null)
{
ICell currentCell = currentRow.GetCell(columnNum);
int length = Encoding.UTF8.GetBytes(currentCell.ToString()).Length;
if (columnWidth < length)
{
columnWidth = length;
}
}
}
sheet.SetColumnWidth(columnNum, columnWidth * 256);
}
