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Convert PDF to bitmap (BMP) in C#

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PDF to BMP

Nutrient .NET SDK renders a PDF page and saves it as a BMP image.

Prepare the project

Register the SDK license before running conversion operations. For setup details, refer to the getting started with .NET SDK guide.

using GdPicture14;


LicenseManager license = new LicenseManager();
license.RegisterKEY("");
using GdPicturePDF pdf = new GdPicturePDF();
using GdPictureImaging imaging = new GdPictureImaging();


pdf.LoadFromFile(@"input.pdf");
pdf.SelectPage(1);
int imageId = pdf.RenderPageToGdPictureImageEx(200, true);
imaging.SaveAsBMP(imageId, "output.bmp");
imaging.ReleaseGdPictureImage(imageId);
pdf.CloseDocument();

This example exports the first page at 200 DPI. Repeat the render and save steps for additional pages.