how to get the ppt total slide number using c#

[mblank]

Hi~,i'm trying to get a ppt's total slide number,with the office com,but i don't know which method will help,
my code can open a ppt only~

Object Nothing = Missing.Value;
           PPT.Application apcprint = new PPT.Application();
           PPT.Presentations presprint = apcprint.Presentations;
           //  apcprint.Presentations;
           PPT.Presentation preprint = null;
           preprint = presprint.Open(filename, Microsoft.Office.Core.MsoTriState.msoCTrue, 
               Microsoft.Office.Core.MsoTriState.msoCTrue, Microsoft.Office.Core.MsoTriState.msoFalse);

thx in advanced!

[mblank]

i hava solved the problem

[Sanjay77]

Hi,

Do you know how to get the current active slide?

[mblank]

@Sanjay77
hi~
if you open the ppt/pptx in c# using Microsoft.Office.Interop.PowerPoint,i don't think there is a "current active slide",can you tell me more about your problems?

[Sanjay77]

Hi mblank,

Thank you for the response.

Below is my scenario,

1. I have created an add-in for PPT. When the user opnes the PPT, he can use my add-in to insert the image that are present in BO server.

2. There can be any no. of slides in the PPT. So I just want to know the current active slide where the user wants to insert the image. i.e. slide which the user is opened when he has clicked on my custom add-in.

After going through the object model, I wrote the below code which could server my purpose.

PowerPoint.DocumentWindow docWins = presentation.Application.Windows[1];
PowerPoint.View view = docWins.View;
PowerPoint.Slide sd =(PowerPoint.Slide) view.Slide;
MessageBox.Show(sd.SlideNumber.ToString());

[mblank]

@Sanjay77
hi~
i'am so sorry for responding you so late.
your idea is so good,but i have no idea about how to solve it,because i am a newbie in office programming.