Choosing storage place for Images

9 10 2008

  

  

Choosing storage place for Images

 

In this article I have jotted down various pros and cons for choosing the best storage place for images used in our web based applications.

 

There are two basic approaches for storing the images that are used in our web application

  1. File System
  2. Database

 

Below are some comparisons between the two:

  

Ease: One can easily configure the path of an image from a directory on the web server containing images while from database one needs to create custom logic for reading Image data (eg .ashx handler for image)

 

 

Flexibility: It is always easy to store a new image file on the web server while in case of database new column needs to be created. 

 

 

Maintenance: Using simple file operations for storing the image on web server is very trivial task while in case of database one might need to create a complex query or business logic.

 

 

Caching: IIS can be easily configured to cache images stored in file system while images in database needs some further complex IIS configuration

 

 

Size: As the web directory in which our application is hosted can be easily scaled in terms of size for storing more images as a when needed while in database the size of database goes on increasing affecting the overall database performance.

 

 

Compatibility: Images are stored on file system with basic file operations while in case of database during migration process to some other database vendor their may be some Data Type compatibility problem

 

 

Performance: File operations are less costly in resource utilization while database operations are more costly in terms of resources.

 

 


Comments : Leave a Comment »
Tags: , , , , , ,
Categories : Miscellaneous

How to Paste HTML content in blogspot?

5 06 2008

Problem in pasting HTML content in your blog?

This is because all the blogs does not allow to directly use html in their content area due to security reasons.

The area for writing the content in Blogspot is commonly known as What You See Is What You Get (WYSIWYS) editor.

This WYSIWYG editor interprets the pasted HTML as true HTML. It will render exactly whatever you paste in it as HTML. This might spoil the look and feel of your blog.

Why this happens?

Special characters used for HTML language like <,>,”,& etc should be treated in special manner.
Example:
 < can be treated as <
 > can be treated as >
 ” can be treated as “e;
 & can be treated as &

So writing these special characters in this manner and pasting it in blog can solve your problem. But this may be a tedious task to perform manually.

So here is the solution for it.

Step 1) After making the below code working in .Net 2.0 copy the HTML you want to put in your blog and paste in the text area.

Step 2) Click Encode HTML button.

Step 3) 2nd step will generate the encoded html below the button.

Step 4) Copy the output from 4th step to your blog content (WYSIWYG) editor.

 
Following sample code converts HTML to Encoded HTML format using Code behind Modal in .Net.

<%@ Page Language="C#" AutoEventWireup="true" ValidateRequest="false" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "<a href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd</a>">
<html xmlns="<a href="http://www.w3.org/1999/xhtml">http://www.w3.org/1999/xhtml</a>">
<head runat="server">
    <title>Encode HTML</title>
</head>
<body>
    <form id="form1" runat="server">
<div>
           <asp:TextBox ID="txtHTML" runat="server" Columns="75" Rows="10" TextMode="MultiLine"></asp:TextBox>     
           <asp:Button ID="btnEncode" runat="server" Text="Encode HTML" OnClick="btnEncode_Click" />
           <asp:Literal ID="litEncodedHTML" runat="server" Mode="Encode"></asp:Literal></div>
    </form>
</body>
</html>

 


using System;
using System.Data;
using System.Configuration;
using System.Collections;
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; 

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    { 

    } 

    protected void btnEncode_Click(object sender, EventArgs e)
    {
        litEncodedHTML.Text = Server.HtmlEncode(txtHTML.Text.Trim());
    }
}

 

 

Note:

Those who are unaware of .Net they can use the same logic with their know language.

The main crux here is Server.HtmlEncode() method which transforms the HTML to encoded HTML.


Comments : 2 Comments »
Tags: , , , , , , , , , , , , , , , , , , ,
Categories : Miscellaneous