Load HTML content to PowerPoint presentations in C# and VB.NET
The following example shows how you can use the GemBox.Presentation library to load HTML content into a PowerPoint presentation slide in your C# and VB.NET applications.
using GemBox.Presentation;
using System.IO;
class Program
{
static void Main()
{
// If using the Professional version, put your serial key below.
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
// Load input HTML file.
string html = File.ReadAllText("%InputFileName%");
// Create a presentation and add a new slide with text box.
var presentation = new PresentationDocument();
var slide = presentation.Slides.AddNew(SlideLayoutType.Custom);
var textBox = slide.Content.AddTextBox(ShapeGeometryType.Rectangle, 0.5, 0.5, 32, 15, LengthUnit.Centimeter);
// Loads text and styling from provided html into textBox.
textBox.Shape.TextContent.LoadText(html, LoadOptions.Html);
// Save the presentation to a PPTX file.
presentation.Save("Load Text From Html.pptx");
}
}
Imports GemBox.Presentation
Imports System.IO
Module Program
Sub Main()
' If using the Professional version, put your serial key below.
ComponentInfo.SetLicense("FREE-LIMITED-KEY")
' Load input HTML file.
Dim html As String = File.ReadAllText("%InputFileName%")
' Create a presentation and add a new slide with text box.
Dim presentation = New PresentationDocument()
Dim slide = presentation.Slides.AddNew(SlideLayoutType.Custom)
Dim textBox = slide.Content.AddTextBox(ShapeGeometryType.Rectangle, 0.5, 0.5, 32, 15, LengthUnit.Centimeter)
' Loads text and styling from provided html into textBox.
textBox.Shape.TextContent.LoadText(html, LoadOptions.Html)
' Save the presentation to a PPTX file.
presentation.Save("Load Text From Html.pptx")
End Sub
End Module
Load an HTML list into a presentation
The following example shows how to load ordered and unordered lists from HTML into a presentation.
using GemBox.Presentation;
class Program
{
static void Main()
{
// If using the Professional version, put your serial key below.
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
// HTML content.
string html =
@"<h2>Ordered list example</h2>
<ol style=""list-style-type: Decimal"">
<li>First item</li>
<li>Second item
<ol style=""list-style-type: lower-alpha"">
<li>Sub item 01
<ol style=""list-style-type: lower-roman"">
<li>Sub item 01</li>
<li>Sub item 02</li>
<li>Sub item 03</li>
</ol>
</li>
<li>Sub item 02</li>
<li>Sub item 03</li>
</ol>
</li>
<li>Third item</li>
<li value=""50"">Arbitrary item</li>
<li>Next item</li>
</ol>
<h2>Unordered list example</h2>
<ul style=""list-style-type: disc"">
<li>First item</li>
<li>Second item
<ul style=""list-style-type: circle"">
<li>Sub item 01
<ul style=""list-style-type: square"">
<li>Sub item 01</li>
<li>Sub item 02</li>
<li>Sub item 02</li>
</ul>
</li>
<li>Sub item 02</li>
<li>Sub item 03</li>
</ul>
</li>
<li>Third item</li>
</ul>";
// Create a presentation and add a new slide with text box.
var presentation = new PresentationDocument();
var slide = presentation.Slides.AddNew(SlideLayoutType.Custom);
var textBox = slide.Content.AddTextBox(ShapeGeometryType.Rectangle, 0.5, 0.5, 32, 15, LengthUnit.Centimeter);
// Loads text and styling from provided html into textBox.
textBox.Shape.TextContent.LoadText(html, LoadOptions.Html);
// Save the presentation to a PPTX file.
presentation.Save("Load Text From Html With List.pptx");
}
}
Imports GemBox.Presentation
Module Program
Sub Main()
' If using the Professional version, put your serial key below.
ComponentInfo.SetLicense("FREE-LIMITED-KEY")
' HTML content.
Dim html As String =
"<h2>Ordered list example</h2>
<ol style=""list-style-type: Decimal"">
<li>First item</li>
<li>Second item
<ol style=""list-style-type: lower-alpha"">
<li>Sub item 01
<ol style=""list-style-type: lower-roman"">
<li>Sub item 01</li>
<li>Sub item 02</li>
<li>Sub item 03</li>
</ol>
</li>
<li>Sub item 02</li>
<li>Sub item 03</li>
</ol>
</li>
<li>Third item</li>
<li value=""50"">Arbitrary item</li>
<li>Next item</li>
</ol>
<h2>Unordered list example</h2>
<ul style=""list-style-type: disc"">
<li>First item</li>
<li>Second item
<ul style=""list-style-type: circle"">
<li>Sub item 01
<ul style=""list-style-type: square"">
<li>Sub item 01</li>
<li>Sub item 02</li>
<li>Sub item 02</li>
</ul>
</li>
<li>Sub item 02</li>
<li>Sub item 03</li>
</ul>
</li>
<li>Third item</li>
</ul>"
' Create a presentation and add a new slide with text box.
Dim presentation = New PresentationDocument()
Dim slide = presentation.Slides.AddNew(SlideLayoutType.Custom)
Dim textBox = slide.Content.AddTextBox(ShapeGeometryType.Rectangle, 0.5, 0.5, 32, 15, LengthUnit.Centimeter)
' Loads text and styling from provided html into textBox
textBox.Shape.TextContent.LoadText(html, LoadOptions.Html)
' Save the presentation to a PPTX file.
presentation.Save("Load Text From Html With List.pptx")
End Sub
End Module
You can use <ol>, <ul> and <li> elements to create numbered and bulleted lists in your presentation, whose formatting will be represented by the TextListFormat class.
You can also use the list-style-type CSS property to customize the marker of your numbered and bulleted lists and use the CSS value property to define a specific number for an item of your ordered list.
