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)
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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 } }