Crop an image in asp.net using c#

Question

I am working on asp.net using c#. I have to adjust an image by taking a portion of that image. I want to crop a portion of image from middle like in the below image.

can anyone help me please.

What have you tried? Why don't you try a google search? switchonthecode.com/tutorials/… — Ash Burlaczenko
– Ash Burlaczenko, Commented Apr 4, 2012 at 13:39

Lali · Accepted Answer · 2013-04-03 07:19:48Z

1

I have done this by getting co-ordinates of the image's portion by Jquery.

jQuery(function($) {
        $('#target').Jcrop({
            onChange: showCoords,
            onSelect: showCoords,
            onRelease: clearCoords
        });
    });
    function showCoords(c) {
        $('#xaxis').val(c.x);
        $('#yaxis').val(c.y);
        $('#x2').val(c.x2);
        $('#y2').val(c.y2);
        $('#xwidth').val(c.w);
        $('#div_width').val(c.w);
        $('#yheight').val(c.h);
        $('#div_height').val(c.h);
    };
    function clearCoords() {
        $('#coords input').val('0');
        $('#yheight').css({ color: 'red' });
        window.setTimeout(function() {
            $('#yheight').css({ color: 'inherit' });
        }, 500);
    };

Then I used these co-ordinates to crop image in C# like

String savedFileName = uploadProfileImage(profileImageName, new System.Drawing.Rectangle(Int32.Parse(xaxis), Int32.Parse(yaxis), Int32.Parse(xwidth), Int32.Parse(yheight)));

public String uploadProfileImage(string profileImageName, System.Drawing.Rectangle rectangle)
    {
        try
        {
            String retFileName = "";
            if (profileImageName != null || profileImageName != "")
            {
                GenerateCroppedThumbNail(profileImageName, rectangle);
            }
            return retFileName;
        }
        catch (Exception)
        {
            return String.Empty;
        }
    }

That works fine

answered Apr 3, 2013 at 7:19

community wiki

Lali

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2 Comments

link64 Over a year ago

What does GenerateCroppedThumbNail do? Why don't you display that as part of your answer as it seems to be the most important part

Bilal Halayqa Over a year ago

I agree with @link64

Lilith River · Accepted Answer · 2012-04-04 14:40:47Z

0

If you're doing it on the server, I suggest using a server-safe wrapper instead of using System.Drawing directly, so you don't have to worry about avoiding the 29+ pitfalls and bugs.

My ImageResizing.Net library offers both automatic and manual cropping

Automatic

new ImageJob(source,dest,new 
 ResizeSettings("width=200;height=200;mode=crop;anchor=middlecenter")).Build();

Manual (by percentages)

new ImageJob(source,dest,new 
 ResizeSettings("crop=20,20,80,80;cropxunits=100;cropyunits=100")).Build();

Manual (in source image coordinates)

new ImageJob(source,dest,new 
 ResizeSettings("crop=200,200,1000,1000;")).Build()

answered Apr 4, 2012 at 14:40

Lilith River

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