npoi导出excel（模板）插入图片，文本只读，不可以修改

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VPurchaseOrder purchaseOrder = PurchaseDataAccess.GetPurchaseOrder(PurchaseOrderId);
HSSFWorkbook hssfworkbookDown;

string modelExlPath = Server.MapPath(@"\b2c\download\供应商采购单模板.xls");
FileStream file = new FileStream(modelExlPath, FileMode.Open, FileAccess.Read);
try
{
//Excel模板的路径
var hssfworkbook = new HSSFWorkbook(file);
NPOI.SS.UserModel.ISheet sheet1 = hssfworkbook.GetSheet("sheet1");
VWarehouse Warehouse = WarehouseDataAccess.GetWarehouseInfoById(purchaseOrder.WarehouseId);
//供应商
sheet1.GetRow(4).GetCell(0).SetCellValue("供应商：" + purchaseOrder.SuppliersName);
//仓库
sheet1.GetRow(4).GetCell(5).SetCellValue("采购单编号：" + purchaseOrder.PurchaseCode);

sheet1.GetRow(5).GetCell(5).SetCellValue("仓库：" + Warehouse.WarehouseName);
sheet1.GetRow(6).GetCell(0).SetCellValue("订单联系人：" + Warehouse.Contact);
sheet1.GetRow(7).GetCell(0).SetCellValue("收货联系人：" + Warehouse.Contact);
sheet1.GetRow(7).GetCell(3).SetCellValue("手机：" + Warehouse.Telephone);
sheet1.GetRow(8).GetCell(0).SetCellValue("收货地址：" + Warehouse.Address);

//ICellStyle Locked = hssfworkbook.CreateCellStyle();
//Locked.IsLocked = true;
//sheet1.GetRow(8).GetCell(0).CellStyle = Locked;

sheet1.ProtectSheet("yangche51");
//循环填充数据
List<VPurchaseOrderDetail> details = PurchaseDataAccess.GetPurchaseOrderDetail(PurchaseOrderId);
var sourceIndex = 12;
int toalRow = sourceIndex + details.Count;
int targetIndex = 0;
VPurchaseOrderDetail item = null;
for (int i = 1; i <= details.Count; i++)
{
item = details[i - 1];
//复制行
var newRow = sheet1.CopyRow(sourceIndex, sourceIndex + i);
newRow.GetCell(0).SetCellValue((i).ToString());
newRow.GetCell(1).SetCellValue(item.PurchaseItemCode);
newRow.GetCell(2).SetCellValue(item.BrandName);
newRow.GetCell(3).SetCellValue(item.CategoryName);
newRow.GetCell(4).SetCellValue(item.FactoryCode);
newRow.GetCell(5).SetCellValue(item.PartsNO);
newRow.GetCell(6).SetCellValue(item.PurchasePrice.ToString("0.0000"));
newRow.GetCell(7).SetCellValue(item.PurchaseQty);
newRow.GetCell(8).SetCellValue((item.PurchasePrice * item.PurchaseRealQty).ToString("0.0000"));

}
//删除行
sheet1.ShiftRows(12, sheet1.LastRowNum, -1);
//总计

int ToalOrderCount = details.Select(s => s.PurchaseQty).Sum();
decimal ToalPurchasePrice = details.Select(s => s.PurchasePrice * s.PurchaseRealQty).Sum();

sheet1.GetRow(toalRow).GetCell(7).SetCellValue(ToalOrderCount.ToString());
sheet1.GetRow(toalRow).GetCell(8).SetCellValue(ToalPurchasePrice.ToString("0.0000"));

//设置样式
//强制Excel重新计算表中所有的公式（这句话会删除一些样式，合并单元格，自动列宽会删除）
//sheet1.ForceFormulaRecalculation = false;

//插入图片
string imagePaht = Server.MapPath(@"\b2c\themes\default\images\17qipei_logo_01.jpg");
byte[] bytes = System.IO.File.ReadAllBytes(imagePaht);
int pictureIdx = hssfworkbook.AddPicture(bytes, NPOI.SS.UserModel.PictureType.JPEG);
HSSFPatriarch patriarch = (HSSFPatriarch)sheet1.CreateDrawingPatriarch();
double lastRowNum = sheet1.LastRowNum.TryType<double>(0);
int row = sheet1.LastRowNum - 11;
int col = 5;

HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 100, 50, col, row, col + 3, row + 4);
HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);
//使图片自动伸缩到原始大小了
pict.Resize();
//输出
using (MemoryStream ms = new MemoryStream())
{
Response.Clear();
hssfworkbook.Write(ms);
Response.AddHeader("content-disposition", "attachment;filename=Purchase" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls");
Response.Charset = "utf-8";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
Response.ContentType = "application/vnd.xls";//输入流类型
Response.BinaryWrite(ms.ToArray());
Response.End();
ms.Close();
}
}
catch (Exception ex)
{
// MessageBox.Show("ERR");
}
finally
{
file.Dispose();
}