.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

Resizing Images using GetThumbnailImage, Bad Compression Rate

Posted By:      Posted Date: October 01, 2010    Points: 0   Category :ASP.Net


 I am using the following code to resize an image from original size


    protected void resizeImage(String fileName, String imagePath, int resizeWidth, int resizeHeight)
        // Load Original Image
        System.Drawing.Image originalImage;
        originalImage = System.Drawing.Image.FromFile(strImageFolder + "original\\" + fileName);

        // Get Original Image Dimensions
        int originalHeight = originalImage.Height;
        int originalWidth = originalImage.Width;

        // Set new Image dimensions
        int newWidth = resizeWidth;
        int newHeight = (newWidth * originalHeight) / originalWidth;

        // Creates new resized image
        System.Drawing.Image resizedImage;
        resizedImage = originalImage.GetThumbnailImage(newWidth, newHeight, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero);
        resizedImage.Save(imagePath + fileName);
Now th

View Complete Post

More Related Resource Links

Storing Resizing Images


Hello Group,

I just wanted to know how other people do this.

I got a site where people can upload images, that can be used in various places, such as profile pictures etc etc.  I need to have the image available in many different sizes. I know I am being a bit general, but I mean in the same way as facebook does.

I am trying to work out the best process to store images


The way I see it there are two ways.

1) resize the image (at the point of upload) to the biggest required size, and then dynamicly resize it to be displayed what what ever size is needed. This would require knowning the biggest ever size and also stroing that. The problem with this is that as it is stored quite large the resize will be processor intensive.

2) Resize the images into as many sizes as needed at the time, and keep the original.

This is either store one big copy and resize it, or store loads of copies to fit all the sizes

I am builiding a tourism website, and when people uplaod the images, I need to display them as slideshow, gallerys and as profile pictures. All different shapes and sizes.

Does anybody have experance of what big websites do


Graham Mattingley





Problem with resizing images and padding them to squared images before binding them to grid



I am developing a web application in ASP.NET and C# using Visual Studio 2008. The application will among other thing store images into a database in the original format and in some resized formats. I have this method that takes an image as argument and returns an image with the specified size:

thumbnailmage = ResizeImage(originalImage, new Size(50,50));

The image returned is proportional to the original image with no side bigger than 50 pixels. E.g. if the originalImage has width 100 and height 200 the resized image has width 25 and height 50. This result is expected and wanted.

Now, to what I really want. I want to modify the ResizeImage method to return a squared thumbnail. I.e. in the originalImage example sizes above, the returned image should have width width and heigth both 50. Also, the image should not be stretched but padded with 12.5 pixels on the left and right side making the width 50. The image format I currently work with is gif with transparent background so the padded image parts should also be tansparent. Here is the code for ResizeImage, does anyone know how it could be modified?

  private static Image ResizeImage(Image imageToResize, Size size)
      int sourceWidth = imageToResize.Width;
      int sourceHeight = imageToResize.Height;


Images in WPF

How to create a Thumbnail of an Image. How to automatically crop an image. The following method allows you to automatically crop an image to it's content.

Reading and Writing Images From a Windows Mobile Database using UltraLite 10(C#)

Periodically I get a request for information on how to read and write binary data to a database running on Windows Mobile. If you search the Internet you can typically find examples that are available on Windows Desktops or allow you to read and write to a local file system. The problem is that it can take a bit of work to get this code to work on Windows Mobile accessing a database.

Ultimately you might be asking, why would I want to store and image in a database? Well in an environment where you synchronizing data between a local mobile database and a consolidated (central) database this can be extremely useful. Imagine if an insurance adjuster went to an accident scene, took a picture of a damaged car, loaded it into his Windows Mobile database and then replicated that image up to the Insurance headquarters for approval. All of this could be done in a very short period of time when using images in the database. Another good example might be a doctor who was waiting for a patient chart to become available. If you could store the image in a database this chart could be sent down to the doctor's device once it became available.

For this article I am not going to get into how to synchronize the images to and from a remote and central database as this is typically fairly straightforward when using a data synchronization technologies like MobiLink

Save images to SQL CE

Storing binary objects (such as image, office document etc.) into database is a little cumbersome when it comes to retrieval. Hence the most commonly accepted way is only store the file path in the database, and to store the documents on a file share.

Store and Display Images from MS Access Database Using C#

There is only the difference of coding syntax to stream the binary data of image content type to upload it into MS Access Database using C#/VB in ASP.Net 2.0

Namespaces required:-
using System.Data.OleDb;

OleDb is used to connect the web site forms with MS Access Database using Microsoft.Jet.OLEDB.4.0

Open File Print File Excel

Batch print many Excel files without having to open each one at a time. Quickly print mass amounts of xls files at once with this program. You must have Excel installed on your machine..

The Free Barcode Creator produces barcode images one at a time, and allows easy saving to a file or

The Free Barcode Creator produces barcode images one at a time, and allows easy saving to a file or pasting into an application. 2D versions are also available:

Browsing all Images in Directory ... ?! asp.net & C#


Hi every one ... How are you ??

OK ... I want to make album ... I try to make it using buttons( next & pre ) using imageButton control and variable (i)

So ... each next (++i) & pre ( --i) to show allimages in directory ("photo")

Here my code in C#  ::

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;
using System.IO;
using System.Collections.Generic;

namespace iThinkerWebSite
    public partial class photos : System.Web.UI.Page

       // LinkedList<string> names = admin.getNames();
        DirectoryInfo dir;
        FileInfo[] files;
        static int i = -1;
        static int l = 0;

        protected void Page_Load(object sender, EventArgs e)
            dir = new DirectoryInfo(MapPath("photo"));
            files = dir.GetFiles();
            //l = (int)names.LongCount();
            l = files.Length;
            if (l == 0)
                Label2.Text = "No Photo to Display !!";
            Image2.ImageUrl = "images/ith.png";

How to position one control relative to another one even after resizing windows?


I used following Jquery code trying to make image close to a table. It worked fine after first load, but the position changed after window is resized. Any ideas? thanks

$(document).ready(function() {
            var pos = $("#mytable").offset();
            var width = $("#mytable").width();
            var left = pos.left + width + 20;
            var top = pos.top + 200;
                position: 'absolute',
                zIndex: 5000,
                left: left,
                top: top

Displaying Dicom images..........



Please guide

  1. How to display Dicom images in .net web apllications.
  2. How can i convert Dicom images to Jpeg.
  3. Can uplease provide me with a sample web application??

css and images gone on url rewriting


 I have a program which rewrites a url to a form     website.com/Default.aspx/name/articleid

The Program works fine ,but after URL rewriting my css sheet and images are gone . 

I am new to this and I have read that I should map my css and images to root. 

So ,I hav done some change to the path files of css and images but it stilll doesnt work .

Plz help me over this ...... 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="TBV.aspx.cs" Inherits="TBV" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Article Page</title>
    <link rel="index" href="~/" title="Home" />
    <link rel="Stylesheet" media="screen,projection" type="text/css" href="~/css/main.css" />
    <link rel="stylesheet" media="print" type="text/css" href="~/css/print.css" />
    <link rel="stylesheet"

image.save not saving images


I have a piece of code that writes string into an image and save it. It works on one of my site and but not the other. The image.save is not working. If this is a permission problem, which account should I change? I use win server 2003 and IIS 6, and have given ASPNET, NETWORK SERVICE, and anonymous user write access.

OutOfMemory when resizing image


I've been pulling my hair out on this one. I have a image gallery module in asp.net. I'm using Telerik RadUpload to upload a sinlge image. I then save the image on the server and create a thumbnail and save it as well. There is no loop involved and is one at a time. It always seems to work when I run it locally on Windows 7 (IIS7) but on the server IIS6 I keep getting OutOfMemory errors. The images I'm trying are barely 1MB so not huge files. I've gone through google and bing over past several days and can't seem to find a solution. In my resize methods I'm using the "using" statement on the image reference, etc. I can pretty much always make it fail with the 3rd line below:

ruPhoto.UploadedFiles[0].SaveAs(Server.MapPath("~/DesktopModules/Gallery2/Photos/" + newPhotoName));
System.Drawing.Image photo = System.Drawing.Bitmap.FromFile(Server.MapPath("~/DesktopModules/Gallery2/Photos/" + newPhotoName));
//System.Drawing.Image img = new System.Drawing.Bitmap(photo); <--- will cause outofmemory error

if I just use the photo variable then the OutOfMemory will occur later in the resize code.

Any help would be greatly appreciated.

Vector Graphics: Build Flexible, Lightweight XML-Based Images for ASP.NET Using Scalable Vector Grap


Scalable Vector Graphics (SVG), a W3C graphics standard built around XML, is one of several vector graphics technologies that allows fast, lightweight drawings such as charts and graphs to be rendered on the fly in an appropriate viewer. There are many advantages to such vector graphics, including conservation of bandwidth and storage media, and flexibility. This article explains these benefits and shows you how to easily add powerful, dynamic, interactive visual elements to your Web applications.

Dennis Forbes

MSDN Magazine July 2003

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend