Exception could not open file plese help me to solve

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i have created an app that uploads files to a folder and then takes the files from that folder and convert it to images.
here is the code

C#

if (FileUpload1.HasFile)
            {
              
                  string file = System.IO.Path.GetFullPath(FileUpload1.PostedFile.FileName);
                  string filname = FileUpload1.PostedFile.FileName;
//UPLOADS THE FILE INTO THE FOLDER
                  FileUpload1.PostedFile.SaveAs(Server.MapPath("~\\NewFolder1\\") + FileUpload1.FileName);
//TAKES THE PATH and file
                  string strPath = Server.MapPath(Request.ApplicationPath) + "~/NewFolder1/" + filname;
//assign the file to ppt
ApplicationClass pptApplication = new ApplicationClass();
                  Presentation pptPresentation = pptApplication.Presentations.Open(strPath, MsoTriState.msoFalse,
                  MsoTriState.msoFalse, MsoTriState.msoFalse);
 
                  var slides = new List<string>();
                  targetPath = Server.MapPath("~/NewFolder1/");
                  targetPath += "\\{0}";
                  for (var i = 1; i <= pptPresentation.Slides.Count; i++)
                  {
                  .
                  .

but when i run the app it gives the follwoing error.

System.Runtime.InteropServices.COMException: PowerPoint could not open the file.
Presentation pptPresentation = pptApplication.Presentations.Open(strPath, MsoTriState.msoFalse....

In this line of code i am getting this above exception

C#

pptApplication.Presentations.Open(strPath, MsoTriState.msoFalse,
                  MsoTriState.msoFalse, MsoTriState.msoFalse);

[Edit]Code block added[/Edit]

Posted 22-Dec-12 0:39am

Pradeepkumar patil sonu

Updated 22-Dec-12 0:42am

Thomas Daniels

v3

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Jibesh 22-Dec-12 8:41am

Please do not post the same question again and again with different header.

http://www.codeproject.com/Questions/513973/Iplusamplustryingplustoplusopenplusppt

you may edit your question using the green 'Improve Question' link at the right bottom of your question to modify. do value others time posting redundant answers to the same questions multiple time.

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Oleksandr Kulchytskyi · Accepted Answer · 2012-12-22T01:05:00

Hi , firts thing that come to my mind is the line of your code:

C#

string strPath = Server.MapPath(Request.ApplicationPath) + "~/NewFolder1/" + filname;

Maybe it could be reasonable to change it with next line:

C#

string strPath = Server.MapPath(System.IO.Path.Combine("~/NewFolder1" , filname));

think this might help you, because when you invoke next line of code , it return the full path to folder "NewFolder1" :
Server.MapPath("~/NewFolder1") -> will be something like that (c:\inetpub\wwwroot\mysite\newfolder1);