asp.net两种方式在模板excel中插入图片：npoi和c# com组件
1.npoi
看具体方法代码：
public void WorkFlowDAC1(string FileName,string xpath)
{
try
{
//InitializeWorkbook();
string path = FileName + ".xls";
FileStream fs = new FileStream(xpath+"//"+path, FileMode.Open,FileAccess.Read);
HSSFWorkbook hssfworkbook = new HSSFWorkbook(fs);
HSSFSheet sheet1 = (HSSFSheet)hssfworkbook.GetSheet("sheet1");
//Sheet sheet1 = hssfworkbook.GetSheet("sheet1");
HSSFPatriarch patriarch = (HSSFPatriarch)sheet1.DrawingPatriarch;
//create the anchor
HSSFClientAnchor anchor;
anchor = new HSSFClientAnchor(0, 0, 0, 255, 2, 2, 4, 7);
//anchor.AnchorType = 2;
//load the picture and get the picture index in the workbook
HSSFPicture picture = (HSSFPicture)patriarch.CreatePicture(anchor, LoadImage(xpath+"//"+FileName+".jpg", hssfworkbook));
//Reset the image to the original size.
//picture.Resize();
//picture.LineStyle = HSSFPicture.LINESTYLE_DASHDOTGEL;
///hssfworkbook.
FileStream file = new FileStream(xpath + @"//"+FileName+@".xls", FileMode.Create);
hssfworkbook.Write(file);
fs.Close();
file.Close();
}
catch(Exception ee)
{
FileName = "";
}
}
public static int LoadImage(string path, HSSFWorkbook wb)
{
FileStream file = new FileStream(path, FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[file.Length];
file.Read(buffer, 0, (int)file.Length);
return wb.AddPicture(buffer, PictureType.JPEG);
}
以上代码已经很详细了，请自己研究，有问题欢迎讨论
2、c#代码
主要是孟子的代码
基础类代码：
using System;
using System.Collections.Generic;
using System.Web;
using Excel = Microsoft.Office.Interop.Excel;
namespace ContractBarcode
{
public class InsertPictureToExcel
{
///
/// 打开没有模板的操作。
///
public void Open()
{
this.Open(String.Empty);
}
///
/// 功能：实现Excel应用程序的打开
///
/// 模板文件物理路径
public void Open(string TemplateFilePath)
{
//得到WorkBook对象, 下面的是打开已有的文件
//打开对象
m_objExcel = new Excel.Application();
m_objExcel.Visible = false;
m_objExcel.DisplayAlerts = false;
//if (m_objExcel.Version != "11.0")
//{
// // MessageBox.Show("您的 Excel 版本不是 11.0 （Office 2003），操作可能会出现问题。");
// m_objExcel.Quit();
// return;
//}
//Excel.Workbook xBook = m_objExcel.Workbooks._Open(@"D:/test.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);
////指定要操作的Sheet，两种方式：
//Excel.Worksheet xSheet = (Excel.Worksheet)xBook.Sheets[1];
m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks;
if (TemplateFilePath.Equals(String.Empty))
{
m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt));
}
else
{
m_objBook = m_objBooks.Open(TemplateFilePath, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing);
}
m_objSheets = (Excel.Sheets)m_objBook.Worksheets;
m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1));
m_objExcel.WorkbookBeforeClose += new Excel.AppEvents_WorkbookBeforeCloseEventHandler(m_objExcel_WorkbookBeforeClose);
}
public void m_objExcel_WorkbookBeforeClose(Excel.Workbook m_objBooks, ref bool _Cancel)
{
// MessageBox.Show("保存完毕！");
}
///
/// 将图片插入到指定的单元格位置。
/// 注意：图片必须是绝对物理路径
///
/// 单元格名称，例如：B4
/// 要插入图片的绝对路径。
public void InsertPicture(string RangeName, string PicturePath)
{
m_objRange = m_objSheet.get_Range(RangeName, m_objOpt);
m_objRange.Select();
Excel.Pictures pics = (Excel.Pictures)m_objSheet.Pictures(m_objOpt);
pics.Insert(PicturePath, m_objOpt);
}
///
/// 将图片插入到指定的单元格位置，并设置图片的宽度和高度。
/// 注意：图片必须是绝对物理路径
///
/// 单元格名称，例如：B4
/// 要插入图片的绝对路径。
/// 插入后，图片在Excel中显示的宽度。
/// 插入后，图片在Excel中显示的高度。
public void InsertPicture(string RangeName, string PicturePath, float PictuteWidth, float PictureHeight)
{
m_objRange = m_objSheet.get_Range(RangeName, m_objOpt);
m_objRange.Select();
float PicLeft, PicTop;
PicLeft = Convert.ToSingle(m_objRange.Left);
PicTop = Convert.ToSingle(m_objRange.Top);
//参数含义：
//图片路径
//是否链接到文件
//图片插入时是否随文档一起保存
//图片在文档中的坐标位置（单位：points）
//图片显示的宽度和高度（单位：points）
//参数详细信息参见：http://msdn2.microsoft.com/zh-cn/library/aa221765(office.11).aspx
m_objSheet.Shapes.AddPicture(PicturePath, Microsoft.Office.Core.MsoTriState.msoFalse, Microsoft.Office.Core.MsoTriState.msoTrue, PicLeft, PicTop, PictuteWidth, PictureHeight);
}
///
/// 将Excel文件保存到指定的目录，目录必须事先存在，文件名称不一定要存在。
///
/// 要保存成的文件的全路径。
public void SaveFile(string OutputFilePath)
{
m_objBook.SaveAs(OutputFilePath, m_objOpt, m_objOpt,
m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange,
m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);
this.Close();
}
///
/// 关闭应用程序
///
public void Close()
{
m_objBook.Close(false, m_objOpt, m_objOpt);
m_objExcel.Quit();
}
///
/// 释放所引用的COM对象。注意：这个过程一定要执行。
///
public void Dispose()
{
ReleaseObj(m_objSheets);
ReleaseObj(m_objBook);
ReleaseObj(m_objBooks);
ReleaseObj(m_objExcel);
System.GC.Collect();
System.GC.WaitForPendingFinalizers();
}
///
/// 释放对象，内部调用
///
///
public void ReleaseObj(object o)
{
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(o);
}
catch { }
finally { o = null; }
}
public Excel.Application m_objExcel = null;
public Excel.Workbooks m_objBooks = null;
public Excel._Workbook m_objBook = null;
public Excel.Sheets m_objSheets = null;
public Excel._Worksheet m_objSheet = null;
public Excel.Range m_objRange = null;
public object m_objOpt = System.Reflection.Missing.Value;
}
}
执行代码：
public void addPic(string fielname,string path)
{
ContractBarcode.InsertPictureToExcel ipt = new ContractBarcode.InsertPictureToExcel();
ipt.Open(path+fielname+".xls");
ipt.InsertPicture("B2", path + fielname + ".jpg");
//ipt.InsertPicture("i8", @"C:/1.jpg", 120, 80);
ipt.SaveFile(path + fielname + ".xls");
ipt.Dispose();
}
NPOI的方法，如果模板中有图片的话，原有的图片会消失掉，不知道什么原因，到现在还未解决，优点是方便，快捷。