Set Background of Slides in PowerPoint Presentations in C#

readme.md

Learn how to change the background color of PowerPoint presentations programmatically using C#: https://blog.aspose.com/2021/08/31/set-background-in-powerpoint-using-csharp/

set-master-slide-background.cs

// Instantiate the Presentation class that represents the presentation file
using (Presentation pres = new Presentation("presentation.pptx"))
{
    // Set the background color of the Master ISlide to Forest Green
    pres.Masters[0].Background.Type = BackgroundType.OwnBackground;
    pres.Masters[0].Background.FillFormat.FillType = FillType.Solid;
    pres.Masters[0].Background.FillFormat.SolidFillColor.Color = Color.ForestGreen;

    // Save presentation
    pres.Save("SetSlideBackgroundMaster_out.pptx", SaveFormat.Pptx);
}

set-slide-background.cs

// Instantiate the Presentation class that represents the presentation file
using (Presentation pres = new Presentation("presentation.pptx"))
{
    // Set the background color of the first ISlide to Blue
    pres.Slides[0].Background.Type = BackgroundType.OwnBackground;
    pres.Slides[0].Background.FillFormat.FillType = FillType.Solid;
    pres.Slides[0].Background.FillFormat.SolidFillColor.Color = Color.Blue;
    
    // Save presentation
    pres.Save("ContentBG_out.pptx", SaveFormat.Pptx);
}

set-slide-gradient-background.cs

// Instantiate the Presentation class that represents the presentation file
using (Presentation pres = new Presentation("presentation.pptx"))
{
    // Apply Gradiant effect to the Background
    pres.Slides[0].Background.Type = BackgroundType.OwnBackground;
    pres.Slides[0].Background.FillFormat.FillType = FillType.Gradient;
    pres.Slides[0].Background.FillFormat.GradientFormat.TileFlip = TileFlip.FlipBoth;

    // Save presentation
    pres.Save("ContentBG_Grad_out.pptx", SaveFormat.Pptx);
}

set-slide-image-background.cs

// Instantiate the Presentation class that represents the presentation file
using (Presentation pres = new Presentation("SetImageAsBackground.pptx"))
{

    // Set the background with Image
    pres.Slides[0].Background.Type = BackgroundType.OwnBackground;
    pres.Slides[0].Background.FillFormat.FillType = FillType.Picture;
    pres.Slides[0].Background.FillFormat.PictureFillFormat.PictureFillMode = PictureFillMode.Stretch;

    // Set the picture
    System.Drawing.Image img = (System.Drawing.Image)new Bitmap(dataDir + "Tulips.jpg");

    // Add image to presentation's images collection
    IPPImage imgx = pres.Images.AddImage(img);

    pres.Slides[0].Background.FillFormat.PictureFillFormat.Picture.Image = imgx;

    // Save the presentation
    pres.Save("ContentBG_Img_out.pptx", SaveFormat.Pptx);
}