Read and write PowerPoint file properties in C# and VB.NET
With the following example, you can learn how to read and write both built-in and custom PowerPoint presentation properties using the GemBox.Presentation library in C# and VB.NET.
using GemBox.Presentation;
using System;
// If using the Professional version, put your serial key below.
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
var presentation = PresentationDocument.Load("Reading.pptx");
var properties = presentation.DocumentProperties;
Console.WriteLine("# Built-in document properties:");
// Write built-in document properties.
properties.BuiltIn[BuiltInDocumentProperty.Title] = "My Title";
properties.BuiltIn[BuiltInDocumentProperty.DateLastSaved] = DateTime.Now.ToString("yyyy-MM-ddTHH:mm:ssZ");
// Read built-in document properties.
foreach (var builtinProperty in properties.BuiltIn)
Console.WriteLine($"{builtinProperty.Key,20}: {builtinProperty.Value}");
Console.WriteLine();
Console.WriteLine("# Custom document properties:");
// Write custom document properties.
properties.Custom["My Custom Property 1"] = "My Custom Value";
properties.Custom["My Custom Property 2"] = 123.4;
// Read custom document properties.
foreach (var customProperty in properties.Custom)
Console.WriteLine($"{customProperty.Key,20}: {customProperty.Value,-20} [{customProperty.Value.GetType()}]");Imports GemBox.Presentation
Imports System
Module Program
Sub Main()
' If using the Professional version, put your serial key below.
ComponentInfo.SetLicense("FREE-LIMITED-KEY")
Dim presentation = PresentationDocument.Load("Reading.pptx")
Dim properties = presentation.DocumentProperties
Console.WriteLine("# Built-in document properties:")
' Write built-in document properties.
properties.BuiltIn(BuiltInDocumentProperty.Title) = "My Title"
properties.BuiltIn(BuiltInDocumentProperty.DateLastSaved) = DateTime.Now.ToString("yyyy-MM-ddTHH:mm:ssZ")
' Read built-in document properties.
For Each builtinProperty In properties.BuiltIn
Console.WriteLine($"{builtinProperty.Key,20}: {builtinProperty.Value}")
Next
Console.WriteLine()
Console.WriteLine("# Custom document properties:")
' Write custom document properties.
properties.Custom("My Custom Property 1") = "My Custom Value"
properties.Custom("My Custom Property 2") = 123.4
' Read custom document properties.
For Each customProperty In properties.Custom
Console.WriteLine($"{customProperty.Key,20}: {customProperty.Value,-20} [{customProperty.Value.GetType()}]")
Next
End Sub
End ModuleOutput
