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When creating a PowerPoint presentation, you may want to ensure that some important content in your presentation grabs the audience’s attention. A great way to make the content more prominent and noticeable is to highlight it with a bright color. This article will demonstrate how to highlight text in a PowerPoint presentation in C# and VB.NET using Spire.Presentation for .NET.
Install Spire.Presentation for .NET
To begin with, you need to add the DLL files included in the Spire.Presentation for.NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.
PM> Install-Package Spire.Presentation
Highlight Text in PowerPoint in C# and VB.NET
The following are the steps to highlight specific text in a PowerPoint document:
- Initialize an instance of Presentation class.
- Load a PowerPoint presentation using Presentation.LoadFromFile() method.
- Loop through the slides in the presentation and the shapes on each slide.
- Check if the current shape is of IAutoShape type.
- If the result is true, typecast it to IAutoShape.
- Initialize an instance of TextHighLightingOptions class, and set the text highlighting options such as whole words only and case sensitive through TextHighLightingOptions.WholeWordsOnly and TextHighLightingOptions.CaseSensitive properties.
- Highlight a specific text in the shape using IAutoShape.TextFrame.HighLightText() method.
- Save the result file using Presentation.SaveToFile() method.
- C#
- VB.NET
using Spire.Presentation;
using System.Drawing;
namespace HighlightTextInPPT
{
class Program
{
static void Main(string[] args)
{
//Create an instance of Presentation class
Presentation presentation = new Presentation();
//Load a PowerPoint file
presentation.LoadFromFile(@"Sample1.pptx");
//Loop through all slides
for (int i = 0; i < presentation.Slides.Count; i++)
{
//Get the current slide
ISlide slide = presentation.Slides[i];
//Loop through the shapes on the slide
for (int j = 0; j < slide.Shapes.Count; j++)
{
//Check if the current shape is of IAutoShape type
if (slide.Shapes[j] is IAutoShape)
{
//Typecast the shape to IAutoShape
IAutoShape shape = slide.Shapes[j] as IAutoShape;
//Create an instance of TextHighLightingOptions class
TextHighLightingOptions options = new TextHighLightingOptions();
//Set text highlighting options
options.CaseSensitive = true;
options.WholeWordsOnly = true;
//Highlight specific text within the shape with color
shape.TextFrame.HighLightText("Spire.Presentation", Color.LightYellow, options);
}
}
}
//Save the result file
presentation.SaveToFile("HighlightText.pptx", FileFormat.Pptx2013);
}
}
}
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Published in
Paragraph and Text
Tagged under
Table of contents (TOC) makes the PDF documents more accessible and easier to navigate, especially for large files. This article demonstrates how to create table of contents (TOC) for a PDF document using Spire.PDF for Java.
import com.spire.pdf.*;
import com.spire.pdf.actions.PdfGoToAction;
import com.spire.pdf.annotations.*;
import com.spire.pdf.general.PdfDestination;
import com.spire.pdf.graphics.*;
import java.awt.*;
import java.awt.geom.*;
public class TableOfContent {
public static void main(String[] args) throws Exception
{
//load PDF file
PdfDocument doc = new PdfDocument("sample.pdf");
int pageCount = doc.getPages().getCount();
//Insert a new page as the first page to draw table of content
PdfPageBase tocPage = doc.getPages().insert(0);
//set title
String title = "Table Of Contents";
PdfTrueTypeFont titleFont = new PdfTrueTypeFont(new Font("Arial", Font.BOLD,20));
PdfStringFormat centerAlignment = new PdfStringFormat(PdfTextAlignment.Center, PdfVerticalAlignment.Middle);
Point2D location = new Point2D.Float((float) tocPage.getCanvas().getClientSize().getWidth() / 2, (float) titleFont.measureString(title).getHeight());
tocPage.getCanvas().drawString(title, titleFont, PdfBrushes.getCornflowerBlue(), location, centerAlignment);
//draw TOC text
PdfTrueTypeFont titlesFont = new PdfTrueTypeFont(new Font("Arial", Font.PLAIN,14));
String[] titles = new String[pageCount];
for (int i = 0; i < titles.length; i++) {
titles[i] = String.format("page%1$s", i + 1);
}
float y = (float)titleFont.measureString(title).getHeight() + 10;
float x = 0;
for (int i = 1; i <= pageCount; i++) {
String text = titles[i - 1];
Dimension2D titleSize = titlesFont.measureString(text);
PdfPageBase navigatedPage = doc.getPages().get(i);
String pageNumText = (String.valueOf(i+1));
Dimension2D pageNumTextSize = titlesFont.measureString(pageNumText);
tocPage.getCanvas().drawString(text, titlesFont, PdfBrushes.getCadetBlue(), 0, y);
float dotLocation = (float)titleSize.getWidth() + 2 + x;
float pageNumlocation = (float)(tocPage.getCanvas().getClientSize().getWidth() - pageNumTextSize.getWidth());
for (float j = dotLocation; j < pageNumlocation; j++) {
if (dotLocation >= pageNumlocation) {
break;
}
tocPage.getCanvas().drawString(".", titlesFont, PdfBrushes.getGray(), dotLocation, y);
dotLocation += 3;
}
tocPage.getCanvas().drawString(pageNumText, titlesFont, PdfBrushes.getCadetBlue(), pageNumlocation, y);
//add TOC action
Rectangle2D titleBounds = new Rectangle2D.Float(0,y,(float)tocPage.getCanvas().getClientSize().getWidth(),(float)titleSize.getHeight());
PdfDestination Dest = new PdfDestination(navigatedPage, new Point2D.Float(-doc.getPageSettings().getMargins().getTop(), -doc.getPageSettings().getMargins().getLeft()));
PdfActionAnnotation action = new PdfActionAnnotation(titleBounds, new PdfGoToAction(Dest));
action.setBorder(new PdfAnnotationBorder(0));
((PdfNewPage) ((tocPage instanceof PdfNewPage) ? tocPage : null)).getAnnotations().add(action);
y += titleSize.getHeight() + 10;
}
//save the resultant file
doc.saveToFile("addTableOfContent.pdf");
doc.close();
}
}
Output:
Published in
Document Operation
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With Spire.Presentation for Java, we can format a table by applying preset table styles. This article will demonstrate how to apply predefined styles to a table on presentation slides.
Firstly, view the table on the PowerPoint document:
import com.spire.presentation.ITable;
import com.spire.presentation.Presentation;
import com.spire.presentation.FileFormat;
import com.spire.presentation.TableStylePreset;
public class SetTableStyle {
public static void main(String[] args) throws Exception {
//Create a PPT document and load file
Presentation presentation = new Presentation();
presentation.loadFromFile("Sample.pptx");
ITable table = null;
for (Object shape : presentation.getSlides().get(0).getShapes()) {
if (shape instanceof ITable) {
table = (ITable) shape;
//Set the table style from TableStylePreset and apply it to selected table
table.setStylePreset(TableStylePreset.MEDIUM_STYLE_1_ACCENT_2);
}
}
//Save the file
presentation.saveToFile("SetTableStyle.pptx", FileFormat.PPTX_2010);
}
}
Effective screenshot after updating the table style:
Published in
Table
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