C# : How to resize image proportionately with max height

asp.net, aspect-ratio, c#, image-resizing

Solution

This almost feels to easy and I feel I'm missing something. Anyway, won't that do the trick?

public static Image ScaleImage(Image image, int maxHeight) 
{ 
    var ratio = (double)maxHeight / image.Height; 

    var newWidth = (int)(image.Width * ratio); 
    var newHeight = (int)(image.Height * ratio); 

    var newImage = new Bitmap(newWidth, newHeight); 
    using (var g = Graphics.FromImage(newImage))
    {
        g.DrawImage(image, 0, 0, newWidth, newHeight); 
    }
    return newImage; 
}

Problem

I need to resize my image proportionately without changing aspect ratio.I have the code to resize with fixed hight and width but I need to resize image proportionately with max height(say 600 pixels). How can I modify the code to suit my requirement? ``` public static void Main() { var image = Image.FromFile(@"c:\logo.png"); var newImage = ScaleImage(image, 300, 400); newImage.Save(@"c:\test.png", ImageFormat.Png); } public static Image ScaleImage(Image image, int maxWidth, int maxHeight) { var ratioX = (double)maxWidth / image.Width; var ratioY = (double)maxHeight / image.Height; var ratio = Math.Min(ratioX, ratioY); var newWidth = (int)(image.Width * ratio); var newHeight = (int)(image.Height * ratio); var newImage = new Bitmap(newWidth, newHeight); Graphics.FromImage(newImage).DrawImage(image, 0, 0, newWidth, newHeight); return newImage; } ``` Please provide your valuable thoughts.

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