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PowerPoint Encryption

    General discussion

  • Hi,
    I am going to Encrypt the powerPoint application.here are the coding i am using.

    PowerPoint.

     

     

     

    switch (permType)

     

    case PermissionLevel.SaveOnly:

    presentattion.Permission.Add(email,

    MsoPermission.msoPermissionSave, missing); 

     

     

     

    break; 

     

    case PermissionLevel.ViewOnly:

    presentattion.Permission.Add(email,

    MsoPermission.msoPermissionRead, missing);  

     

     

     

    break;

     

    case PermissionLevel.PrintOnly:

    presentattion.Permission.Add(email,

    MsoPermission.msoPermissionPrint, missing);  

     

     

     

    break;

     

    presentattion.Save();

    powerPoint.Quit();


    when saving the document it raised error

    Error : Presentation (unknown member) : PowerPoint was unable to open or save this document. Please ensure that you have access privileges to read or write the document and that it is not encrypted.
    Anyone have idea to fix this eroor. I doubled cheked about privilages to read and write for the user. this error is not occuring when appling permissions to word and excel file

     

     

     

     

     

     

    ApplicationClass powerPoint = new PowerPoint.ApplicationClass();

    PowerPoint.

    Presentation presentattion = powerPoint.Presentations.Open(localfileName, MsoTriState.msoFalse, MsoTriState.msoTrue, MsoTriState.msoFalse);  
    Tuesday, September 29, 2009 12:22 PM

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