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Crop image with C#

This is a snippet for cropping an image. You could set this up with a draggable square so the user can chose where to crop. Values in here are hardcoded for my use

Submitted By: PsychoCoder

Actions:

Rating:

Views: 2,832

Language: C#

Last Modified: May 25, 2008

Instructions: Pass the name of the image, height & width and coordinates

Snippet

//Namespace Reference
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
/// <summary>
/// method for cropping an image.
/// </summary>
/// <param name="img">the image to crop</param>
/// <param name="width">new height</param>
/// <param name="height">new width</param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <returns></returns>
public Image Crop(string img, int width, int height, int x, int y)
{
try
{
Image image = Image.FromFile(img);
Bitmap bmp = new Bitmap(width, height, PixelFormat.Format24bppRgb);
bmp.SetResolution(80, 60);
Graphics gfx = Graphics.FromImage(bmp);
gfx.SmoothingMode = SmoothingMode.AntiAlias;
gfx.InterpolationMode = InterpolationMode.HighQualityBicubic;
gfx.PixelOffsetMode = PixelOffsetMode.HighQuality;
gfx.DrawImage(image, new Rectangle(0, 0, width, height), x, y, width, height, GraphicsUnit.Pixel);
// Dispose to free up resources
image.Dispose();
bmp.Dispose();
gfx.Dispose();
return bmp;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return null;
}
}

Copy & Paste

//Namespace Reference
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

/// <summary>
/// method for cropping an image.
/// </summary>
/// <param name="img">the image to crop</param>
/// <param name="width">new height</param>
/// <param name="height">new width</param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <returns></returns>
public Image Crop(string img, int width, int height, int x, int y)
{
    try
    {
        Image image = Image.FromFile(img);
        Bitmap bmp = new Bitmap(width, height, PixelFormat.Format24bppRgb);
        bmp.SetResolution(80, 60);

Graphics gfx = Graphics.FromImage(bmp);
        gfx.SmoothingMode = SmoothingMode.AntiAlias;
        gfx.InterpolationMode = InterpolationMode.HighQualityBicubic;
        gfx.PixelOffsetMode = PixelOffsetMode.HighQuality;
        gfx.DrawImage(image, new Rectangle(0, 0, width, height), x, y, width, height, GraphicsUnit.Pixel);
        // Dispose to free up resources
        image.Dispose();
        bmp.Dispose();
        gfx.Dispose();

return bmp;
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
        return null;
    }            
}

Comments
cipher_nemo 2008-07-17 13:22:03
Awesome, works like a charm! Thanks for the simple example to help me crop images in .NET and C#.
cipher_nemo 2008-07-17 13:22:59
Oh, one other thing I forgot to mention: don't dispose bmp before you return it. I had to remove that line in order to return the actual image.