Spire.Presentation 4.5.5 supports changing the master of a slide by setting MasterSlideID

We're pleased to announce that Spire.Presentation 4.5.5 is released today. This version supports to replace one master slide with another by setting the MasterSlideID property. It also fixes several issues occurring when loading a PPTX document and converting PPT to image. View more details below.

New Features:

• Supports changing the master of a slide by setting the MasterSlideID property.

ppt.Slides[1].MasterSlideID = ppt.Slides[0].MasterSlideID;

Bug Fixes:

• Fixes the issue that the label content of the chart was incorrect when converting PPT to image.
• Fixes the issue that the application threw an error "Object reference not set to an instance of an object" when loading a PPTX document.
• Fixes the issue that the application threw an error "the ContentType string is invalid" when using OpenXml API to load the saved PPTX document.
• Fixes the issue that the application threw an error "Microsoft PowerPoint 2007 file is corrupt" when loading a PPTX document.