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Save images in C#

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Overview

To save a GdPicture image to a file, use one of the SaveAs... methods of the GdPictureImaging class.

For example, the SaveAsPNG method saves a GdPicture image to a PNG file. Refer to supported file types to see available output formats.

Most SaveAs... methods use:

  • imageID — The GdPicture image identifier.
  • FilePath — The output file path.
  • Optional format-specific parameters (for quality/compression/settings).

When you no longer need an image resource, release it with the ReleaseGdPictureImage method.

The following example saves a previously loaded JPG image to PNG format:

using GdPicture14;
using System;


using GdPictureImaging gdPictureImaging = new GdPictureImaging();


// Create a GdPicture image from a JPG file.
int imageID = gdPictureImaging.CreateGdPictureImageFromFile(@"C:\temp\source.jpg");
if (imageID == 0)
{
    Console.WriteLine($"CreateGdPictureImageFromFile failed: {gdPictureImaging.GetStat()}");
    return;
}


// Save the GdPicture image as a PNG file.
GdPictureStatus status = gdPictureImaging.SaveAsPNG(imageID, @"C:\temp\output.png");
if (status != GdPictureStatus.OK)
{
    Console.WriteLine($"SaveAsPNG failed: {status}");
}


gdPictureImaging.ReleaseGdPictureImage(imageID);