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用C#编程从数据库中读取图片数据导进Excel文件的方法(如何从数据库中读取保存的文件,直接打开,中间不保存到本地)

2012-08-11 19:44 1681 查看
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using System;
using System.IO;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
using Excel;

private void EduceExcel()
{
string picPath=Directory.GetCurrentDirectory()+'\\Excelpic.jpg';
string ExcelName=Directory.GetCurrentDirectory()+'\\ExcelModul.xls';
string fileName = 'Excel'+DateTime.Now.ToString().Replace(':', '') + '.xls';
Excel.Application app =new Excel.Application();//建立Excel对象
app.Visible=true;//让Excel文件可见
Workbook objbook;
objbook = app.Workbooks.Add(ExcelName);
Worksheet worksheet;
worksheet =(Worksheet)objbook.Worksheets[1];
Excel.Pictures pics=(Excel.Pictures)worksheet.Pictures(Type.Missing);//建立图片集合对象

int TD=1;
int p=1;
PicItemColletion picItems= PicItem.Getpictems();//读取数据库图片数据集合
foreach(PicItem PI in picItems)
{
if(PI.ImageData != null)
{
MemoryStream stream = new MemoryStream(PI.ImageData, 0, PI.ImageData.Length);

Bitmap bitmap = new Bitmap(stream);

bitmap.Save(picPath,System.Drawing.Imaging.ImageFormat.Jpeg);//保存临时图片文件到硬盘里
if(File.Exists(picPath))
{
stream.Close();//关闭图像文件流

Range range_1 =range=worksheet.get_Range('A'+TD.ToString(),'A'+TD.ToString());
//获取填充单元格范围

pics.Insert(picPath,Type.Missing);//获取图片

Excel.Picture pic = (Excel.Picture )pics.Item(p);//建立图片集合某一图片对象

pic.Left = (double)range_1.Left;
pic.Top = (double)range_1.Top;
pic.Height =(double)range_1.Height;
pic.Width =(double)range_1.Width;
TD=TD+1;
p=p+1;
}
}

if(File.Exists(picPath))
{
File.Delete(picPath);//删除图片
}
}
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