用C#打开一个pdf文件

用C#打开一个pdf文件

http://www.o2sol.com/public/webui/samples.shtml  
  下载XpdfRasterizer.dll，XpdfRasterizerNet.dll，引用即可用  
  如  
  using   XpdfRasterizerNet;  
   
  protected   System.Web.UI.WebControls.Button   Button1;  
  protected   System.Web.UI.HtmlControls.HtmlInputFile   File1;  
  protected   System.Web.UI.WebControls.Label   Label1;  
  protected   System.Web.UI.WebControls.PlaceHolder   PlaceHolder1;  
  private   void   Page_Load(object   sender,   System.EventArgs   e)  
  {  
  this.Label1.Text="";  
  }  
   
  #region   Web   Form   Designer   generated   code  
  override   protected   void   OnInit(EventArgs   e)  
  {  
  //  
  //   CODEGEN:   This   call   is   required   by   the   ASP.NET   Web   Form   Designer.  
  //  
  InitializeComponent();  
  base.OnInit(e);  
  }  
   
  ///   <summary>  
  ///   Required   method   for   Designer   support   -   do   not   modify  
  ///   the   contents   of   this   method   with   the   code   editor.  
  ///   </summary>  
  private   void   InitializeComponent()  
  {          
  this.Button1.Click   +=   new   System.EventHandler(this.Button1_Click);  
  this.Load   +=   new   System.EventHandler(this.Page_Load);  
   
  }  
  #endregion  
   
  private   string   GetFilePath()  
  {  
  //4/19/2005   5:44:28   PM  
  string   time=System.DateTime.Now.ToString();  
  time=time.Replace("/","");  
  time=time.Replace("   ","");  
  time=time.Replace(":","");  
  //time+=".pdf";  
  string   path=Server.MapPath("PDF2JPG.aspx");  
  path=path.Replace("PDF2JPG.aspx",@"Files\"+time);  
  return   path;  
  }  
  private   void   Button1_Click(object   sender,   System.EventArgs   e)  
  {  
  //upload  
  int   len=File1.PostedFile.FileName.Length;  
  string   filetype=File1.PostedFile.FileName.Substring(len-3,3);  
  if(filetype.ToLower()!="pdf")  
  {  
  this.Label1.Text="Please   select   pdf   file";  
  return   ;  
  }  
  else  
  this.Label1.Text="";  
  string   fileName=GetFilePath();  
  string   pdffile=fileName+".pdf";  
  if   (File1.PostedFile   !=   null)    
  {  
  try    
  {  
  File1.PostedFile.SaveAs(pdffile);  
  }  
  catch  
  {  
  Response.Write("Upload   fail...");  
  }  
  }  
  //convert   to   jpg  
   
  double   dpi=120;  
  XpdfRasterizerNet.XpdfRasterizerClass       rast=new   XpdfRasterizerNet.XpdfRasterizerClass();  
  rast.loadFile(pdffile);  
  for(int   page=1;page<=rast.numPages   ;page++)  
  {  
  string   jpgfile=fileName+page.ToString()+".bmp";  
  try  
  {  
  rast.writePageBitmap(page,dpi,rast.imageRGB,rast.imageFileBMP,jpgfile);  
  System.Web.UI.WebControls.Image     image=new   System.Web.UI.WebControls.Image();  
  image.ImageUrl=jpgfile;  
  this.PlaceHolder1.Controls.Add(image);  
  }  
  catch  
  {  
  Response.Write("Convert   fail...:");  
  }  
  }  
  rast.closeFile();  
   
  }