C#使用NPOI在Excel中插入图片

//Excel 可以创建两种 HSSFWorkbook  XSSFWorkbook
IWorkbook wb = new HSSFWorkbook(ms);

//加入图片    pic["PlacodeQPA"] 为图片的byte[],  PictureType.PNG 为图片的类型            
int ip = wb.AddPicture(pic["PlacodeQPA"], PictureType.PNG);
//获取sheet页，可以根据sheet页名称获取，也可以根据sheet页索引(从0开始)获取
//sheet = wb.GetSheetAt(0);   
//先将图片加入wb中，再去获取sheet页！！！                
sheet = wb.GetSheet("稽核主页");
                    
IDrawing drawing = sheet.CreateDrawingPatriarch();
                    
IClientAnchor anchor = wb.GetCreationHelper().CreateClientAnchor();
//左上角的行                    
anchor.Row1 = 28;
//左上角的列                  
anchor.Col1 = 1;
//右下角的行                   
anchor.Row2 = 38;
//右下角的列                      
anchor.Col2 = 4;
                   
IPicture picture = drawing.CreatePicture(anchor, ip);

QPA图为插入的图片