Created
March 6, 2018 11:53
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A function/method to change dimensions of an Image in C#
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using System.Drawing; | |
using System.Drawing.Drawing2D; | |
using System.Drawing.Imaging; | |
using System.IO; | |
namespace ConsoleApplication { | |
public class ImageEditor { | |
/// <summary> | |
/// Resize the image to the specified width and height. | |
/// </summary> | |
/// <param name="image">The image to resize.</param> | |
/// <param name="width">The width to resize to.</param> | |
/// <param name="height">The height to resize to.</param> | |
/// <returns>The resized image.</returns> | |
public static Bitmap Resize(Image image, int width, int height) { | |
var destRect = new Rectangle(0, 0, width, height); | |
var destImage = new Bitmap(width, height); | |
destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution); | |
using (var graphics = Graphics.FromImage(destImage)) { | |
graphics.CompositingMode = CompositingMode.SourceCopy; | |
graphics.CompositingQuality = CompositingQuality.HighQuality; | |
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic; | |
graphics.SmoothingMode = SmoothingMode.HighQuality; | |
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality; | |
using (var wrapMode = new ImageAttributes()) { | |
wrapMode.SetWrapMode(WrapMode.TileFlipXY); | |
graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode); | |
} | |
} | |
return destImage; | |
} | |
/// <summary> | |
/// Converts an array of bytes to an Image instance | |
/// </summary> | |
/// <param name="bytes">The array of bytes to convert to Image instance.</param> | |
/// <returns>The Image instance.</returns> | |
public static Image BytesToImage(byte[] bytes) { | |
Image img; | |
using (MemoryStream ms = new MemoryStream(bytes)) { | |
img = Image.FromStream(ms); | |
} | |
return img; | |
} | |
/// <summary> | |
/// Saves a Bitmap instance to a file. | |
/// </summary> | |
/// <param name="bitmap">The Bitmap to save.</param> | |
/// <param name="path">The path to save to.</param> | |
/// <param name="nameWithExtension">The file's name to save.</param> | |
/// <param name="imageFormat">The ImageFormat to save as.</param> | |
public static void SaveToPath(Bitmap bitmap, string path, string nameWithExtension, ImageFormat imageFormat) { | |
bitmap.Save(path + nameWithExtension, imageFormat); | |
bitmap.Dispose(); | |
} | |
} | |
} |
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