Lock or Password Protect PPTX using C#

Build your own .NET apps to protect presentation files using server-side APIs.

Protecting a PPTX Presentation via C#

Using Aspose.Slides for .NET, you can protect your PPTX presentation from opening or modification by setting a password. Then, to open or modify the locked presentation, a user has to provide the password.

Encrypting a PPTX Presentation using C#
using (Presentation presentation = new Presentation("pres.pptx"))
{
    presentation.ProtectionManager.Encrypt("123123");
    presentation.Save("encrypted-pres.pptx", SaveFormat.Pptx);
}

Setting Write Protection to a PPTX Presentation using C#
using (Presentation presentation = new Presentation("pres.pptx"))
{
    presentation.ProtectionManager.SetWriteProtection("123123");
    presentation.Save("write-protected-pres.pptx", SaveFormat.Pptx);
}

How to Password Protect PPTX via C#

These are the steps to Protect PPTX files.

Load PPTX with an instance of Presentation
Protect the presentation using ProtectionManager class
Save result in PPTX format

Other Supported Protect Formats

Using C#, You can also protect the following formats:

ODP

PPT