Setting a background for slides is a crucial step in creating a visually appealing and impactful presentation. A well-designed background can provide a consistent visual theme, drawing your audience's attention and keeping them engaged throughout your presentation. In this article, we will demonstrate how to set background color or picture for PowerPoint slides in C# and VB.NET using Spire.Presentation for .NET library.
- Set a Background Color for a PowerPoint Slide in C# and VB.NET
- Set a Gradient Background for a PowerPoint Slide in C# and VB.NET
- Set a Background Picture for a PowerPoint Slide in C# and VB.NET
- Set a Background for a Slide Master in PowerPoint in C# and VB.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
Set a Background Color for a PowerPoint Slide in C# and VB.NET
Adding a background color for a PowerPoint slide is very simple. You just need to set the fill mode of the slide’s background as a solid fill and then set a color for the slide’s background. The detailed steps are as follows:
- Initialize an instance of the Presentation class.
- Load a PowerPoint presentation using Presentation.LoadFromFile() method.
- Get a specific slide using Presentation.Slides[int index] property.
- Access the background of the slide using ISlide.SlideBackground property.
- Set the type of the slide's background as a custom type using SlideBackground.Type property.
- Set the fill mode of the slide’s background as a solid fill using SlideBackground.Fill.FillType property.
- Set a color for the slide’s background using SlideBackground.Fill.SolidColor.Color property.
- Save the result presentation using Presentation.SaveToFile() method.
- C#
- VB.NET
using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;
namespace SolidBackground
{
internal class Program
{
static void Main(string[] args)
{
//Initialize an instance of the Presentation class
Presentation ppt = new Presentation();
//Load a PowerPoint presentation
ppt.LoadFromFile("Sample.pptx");
//Get the first slide
ISlide slide = ppt.Slides[0];
//Access the background of the slide
SlideBackground background = slide.SlideBackground;
//Set the type of the slide's background as a custom type
background.Type = BackgroundType.Custom;
//Set the fill mode of the slide's background as a solid fill
background.Fill.FillType = FillFormatType.Solid;
//Set a color for the slide's background
background.Fill.SolidColor.Color = Color.PaleTurquoise;
//Save the result presentation
ppt.SaveToFile("Solidbackground.pptx", FileFormat.Pptx2013);
ppt.Dispose();
}
}
}
Set a Gradient Background for a PowerPoint Slide in C# and VB.NET
Adding a gradient background is a little complex. You need to set the fill mode of the slide’s background as a gradient fill and then set the gradient stops and colors. The detailed steps are as follows:
- Initialize an instance of the Presentation class.
- Load a PowerPoint presentation using Presentation.LoadFromFile() method.
- Get a specific slide using Presentation.Slides[int index] property.
- Access the background of the slide using ISlide.SlideBackground property.
- Set the type of the slide's background as a custom type using SlideBackground.Type property.
- Set the fill mode of the slide’s background as a gradient fill using SlideBackground.Fill.FillType property.
- Set gradient stops and colors for the slide’s background using SlideBackground.Fill.Gradient.GradientStops.Append() method.
- Set the shape type and angle for the gradient fill.
- Save the result presentation using Presentation.SaveToFile() method.
- C#
- VB.NET
using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;
namespace GradientBackground
{
internal class Program
{
static void Main(string[] args)
{
//Initialize an instance of the Presentation class
Presentation ppt = new Presentation();
//Load a PowerPoint presentation
ppt.LoadFromFile("Sample.pptx");
//Get the first slide
ISlide slide = ppt.Slides[0];
//Access the background of the slide
SlideBackground background = slide.SlideBackground;
//Set the type of the slide's background as a custom type
background.Type = BackgroundType.Custom;
//Set the fill mode of the slide's background as a gradient fill
background.Fill.FillType = FillFormatType.Gradient;
//Set gradient stops and colors
background.Fill.Gradient.GradientStops.Append(0.1f, Color.LightCyan);
background.Fill.Gradient.GradientStops.Append(0.7f, Color.LightSeaGreen);
//Set the shape type of the gradient fill
background.Fill.Gradient.GradientShape = GradientShapeType.Linear;
//Set the angle of the gradient fill
background.Fill.Gradient.LinearGradientFill.Angle = 45;
//Save the result presentation
ppt.SaveToFile("Gradientbackground.pptx", FileFormat.Pptx2013);
ppt.Dispose();
}
}
}
Set a Background Picture for a PowerPoint Slide in C# and VB.NET
To add a background picture for a PowerPoint slide, you need to set the fill mode of the slide’s background as a picture fill, then add a picture to the image collection of the presentation and set it as the slide’s background. The detailed steps are as follows:
- Initialize an instance of the Presentation class.
- Load a PowerPoint presentation using Presentation.LoadFromFile() method.
- Get a specific slide using Presentation.Slides[int index] property.
- Access the background of the slide using ISlide.SlideBackground property.
- Set the type of the slide's background as a custom type using SlideBackground.Type property.
- Set the fill mode of the slide’s background as a picture fill using SlideBackground.Fill.FillType property.
- Add an image to the image collection of the presentation using Presentation.Images.Append() method.
- Set the image as the slide’s background using background.Fill.PictureFill.Picture.EmbedImage property.
- Save the result presentation using Presentation.SaveToFile() method.
- C#
- VB.NET
using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;
namespace PictureBackground
{
internal class Program
{
static void Main(string[] args)
{
//Initialize an instance of the Presentation class
Presentation ppt = new Presentation();
//Load a PowerPoint presentation
ppt.LoadFromFile("Sample.pptx");
//Get the first slide
ISlide slide = ppt.Slides[0];
//Access the background of the slide
SlideBackground background = slide.SlideBackground;
//Set the type of the slide's background as a custom type
background.Type = BackgroundType.Custom;
//Set the fill mode of the slide's background as a picture fill
background.Fill.FillType = FillFormatType.Picture;
Image img = Image.FromFile("bg.jpg");
//Add an image to the image collection of the presentation
IImageData image = ppt.Images.Append(img);
//Set the image as the slide's background
background.Fill.PictureFill.FillType = PictureFillType.Stretch;
background.Fill.PictureFill.Picture.EmbedImage = image;
//Save the result presentation
ppt.SaveToFile("Picturebackground.pptx", FileFormat.Pptx2013);
ppt.Dispose();
}
}
}
Set a Background for a Slide Master in PowerPoint in C# and VB.NET
If you don’t wish to set backgrounds for slides one by one, you can set a background for the slide master, then all slides using the same slide master will be applied with the background automatically. The following steps show how to set a solid background color for a slide master:
- Initialize an instance of the Presentation class.
- Load a PowerPoint presentation using Presentation.LoadFromFile() method.
- Get a specific slide master using Presentation.Masters[int index] property.
- Access the background of the slide using ISlide.SlideBackground property.
- Set the type of the slide's background as a custom type using SlideBackground.Type property.
- Set the fill mode of the slide’s background as a solid fill using SlideBackground.Fill.FillType property.
- Set a color for the slide’s background using SlideBackground.Fill.SolidColor.Color property.
- Save the result presentation using Presentation.SaveToFile() method.
- C#
- VB.NET
using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;
namespace AddBackgroundToSlideMaster
{
internal class Program
{
static void Main(string[] args)
{
//Initialize an instance of the Presentation class
Presentation ppt = new Presentation();
//Load a PowerPoint presentation
ppt.LoadFromFile("Sample.pptx");
//Get the first slide master
IMasterSlide slide = ppt.Masters[0];
//Access the background of the slide
SlideBackground background = slide.SlideBackground;
//Set the type of the slide's background as a custom type
background.Type = BackgroundType.Custom;
//Set the fill mode of the slide's background as a solid fill
background.Fill.FillType = FillFormatType.Solid;
//Set a color for the slide's background
background.Fill.SolidColor.Color = Color.PeachPuff;
//Save the result presentation
ppt.SaveToFile("AddBackgroundToSlideMaster.pptx", FileFormat.Pptx2013);
ppt.Dispose();
}
}
}
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