ASP.NET Questions and Answers – Part 5

What is differences between an ADO.NET Dataset and an ADO Recordset?

• ADO RecordSet looks like a single table. ADO.Net DataSet is collection of single or more tables.
• ADO RecordSet can hold data from a single data source. ADO.Net DataSet can hold data from any data sources.
• ADO RecordSet is a connected environment. ADO.NET DataSet is a collected of tables and it is a disconnected environment i.e., there is no constant connection with database.

What is the parent class of the Web server control?

The System.Web.Ul.Control class is the parent class for all Web server controls.

What are the various ways of authentication techniques in ASP.NET?

• Windows Authentication - This is the default authentication technique. It can work with any form of Microsoft Internet Information Services (IIS) authentication, such as Basic, Integrated Windows authentication (NTLM/Kerberos), Digest, and certificates. The syntax of Windows authentication mode is given as follows:
• Forms Authentication - You can specify this mode as a default authentication mode by using the following code snippet:
• Passport - This mode works with Microsoft Passport authentication, as shown in the following code snippet:

Related posts:

• ASP.NET Questions and Answers – Part 5
• ASP.NET Questions and Answers – Part 4
• ASP.NET Questions and Answers – Part 3
• ASP.NET Questions and Answers – Part 2
• ASP.NET Questions and Answers

Change Privacy Settings on Flickr

Recently Flickr increased the capacity of free plan to 1 terabyte. It’s great. Flickr is one of the best photos hosting web site. However, you need to review and change its default settings.

The default settings before change

Only myself can access to original file


Default settings for upload

Change it to myself

After the change of default upload.

ASP.NET Questions and Answers – Part 4

Why we should using HttpUtility.HtmlEncode?
We should using HttpUtility.HtmlEncode method to sanitize the user input.This prevents users from injecting Javascrip into web application.

What is the difference between ASP.NET MVC 3 Web Application template and ASP.NET MVC 3 Empty Web Application?
One difference between the full ASP.NET MVC 3 Web Application template and the ASP.NET MVC 3 Empty Web Application template is that the empty template doesn’t include an Account Controller.

What is the difference between Session State and View State?
Both Session State and View State used to keep track data between the post back. Session State is server based. View State is a client based. (ASP.NET State Management Overview)

ASP.NET session state enables you to store and retrieve values for a user as the user navigates ASP.NET pages in a Web application. ASP.NET session state identifies requests from the same browser during a limited time window as a session, and provides a way to persist variable values for the duration of that session. (ASP.NET Session State Overview)

View state is the method that the ASP.NET page framework uses to preserve page and control values between round trips. When the HTML markup for the page is rendered, the current state of the page and values that must be retained during postback are serialized into base64-encoded strings. This information is then put into the view state hidden field or fields. (ASP.NET View State Overview).

Related posts:

• ASP.NET Questions and Answers – Part 5
• ASP.NET Questions and Answers – Part 4
• ASP.NET Questions and Answers – Part 3
• ASP.NET Questions and Answers – Part 2
• ASP.NET Questions and Answers

Notes on MVC Music Part 3 Tutorial

MVC Music Store is a great tutorial written by Jon Galloway. Using Visual Studio 2012 with MVC 4 Web Application Empty template, the following folders are note available:

• /View/Shared
• /Content/
• /Scripts

Here are solutions:

1. Drag /Content folder from MVCMusicStore-Assets.zip into MvcMusicStore solution folder in Visual Studio 2012. If you just drag and drop in Windows Explorer, make sure it 'included in the project'
2. Select Manage Nuget Packagse under Project menu to install jQuery. The /Scripts folders will create under MvcMusicStore folder.
3. Add folder Shared to /View folder
4. Right click on /View/ folder to add MVC 4 Layout page (Razor) and named it _Layout.cshtml. Copy the code in tutorial into this file. Also correct version of installed jQuery script. Here, I used jquery-2.0.0.min.js instead of jquery-1.5.1.min.js
5. Right click on /View/Shared folder to add MVC 4 Layout page (Razor) and named it _ViewStart.cshtml. Added the following codes to this file:
   @{
Layout = "~/Views/Shared/_Layout.cshtml";
}

ASP.NET Questions and Answers – Part 3

What is a master page?
A master page is a template for other web pages in your web application with shared layout and functionality. The master page defines placeholder for the content which can overridden by content pages.

What is the Global.asax file?
The Global.asax file, also known as the ASP.NET application file, is an optional file that contains code for responding to application-level events raised by ASP.NET or by HttpModules. The Global.asax file resides in the root of an ASP.NET based application. At run time, Global.asax is parsed and compiled into a dynamically generated .NET Framework class derived from the HttpApplication base class. The Global.asax itself is configured so that any direct URL request for it is automatically rejected; external users cannot download or view the code written within it. Read more at msdn.microsoft.com

What is the difference between ASP and ASP.NET?

• ASP is interpreted. ASP.NET is compiled.
• ASP uses VBScript. However, ASP.NET uses C# and VB.NET which are compiled to Microsoft Intermediate Language (MSIL).

Related posts:

• ASP.NET Questions and Answers – Part 5
• ASP.NET Questions and Answers – Part 4
• ASP.NET Questions and Answers – Part 3
• ASP.NET Questions and Answers – Part 2
• ASP.NET Questions and Answers

Manual Install WordPress on GoDaddy 2G Web Hosting Plan

You may got this message "This application is NOT compatible with any of your hosting plans" when attempt to install WordPress on GoDaddy 2G Web Hosting. If you did not want to upgrade to 4G plan, you can manual install a latest version of WordPress by yourself.

1. Make sure the setting for PHP version is 5.3 in Programming Languages section.
2. Create MySQL database for WordPress from your GoDaddy Web Hosting control panel. Here the database name is same as user.
3. Download the latest stable release of WordPress (Version 3.4.2) here.
4. Unzip the archive, modify wp-config-sample.php as instructed in Famous 5-Minutes Install page.
5. Upload to GoDaddy web hosting.

If you experience the Http error 500, check your wp-config.php to make sure the database user name has no @ sign (myusername not myusername@127.0.0.1 for example)

Free Internet Fax

Which one is the best to send free fax from computer using online service without fax machine? I don't like any fax service with monthly fee. I don't like to provide my credit card number for a free trial. I like these below fax services because they are free. So, what is the catch?

Are they reliable and secure? How about the privacy of our faxes?

http://www.myfax.com/free/
MyFax Free lets you send a fax for free to over 40 countries. This free faxing service is provided by Protus IP Solutions.
* Please note that existing MyFax® customers cannot use this free Service.
MyFax® is a trademark of j2 Global Communications, Inc. and its affiliates.

http://faxzero.com/
Free Fax
Ad on the cover page
Fax 1 document — max 3 pages
Max 2 free faxes per day

http://www.bestfreefax.com/freefax.php
Send a Free Fax
No Setup Fee
Free Outbound Faxing
No Credit Card Required
Instant Activation

http://www.gotfreefax.com/
Free Fax Service
Truly FREE!
Free fax cover page, No Ads
3 pages per fax maximum
2 free faxes per day maximum

Install WordPress 3.1.3 on Ubuntu 11.04

WordPress is web application you can use to create a beautiful blog or website. This is an open source software. You can get it free at http://wordpress.org/download/ . Before you install WordPress on Ubuntu 11.04 (Natty Narwhal), make sure you already install on your Linux machine: Apache, MySQL and PHP (LAMP).

1. Unzip wordpress-3.1.3.zip to a specified.

2. Make the virtual path for Apache web server:
sudo gedit /etc/apache2/httpd.conf
add a new line:
Alias /wordpress /home/yourusername/wordpress
and
restart sudo /etc/init.d/apache2 restart

3. Type http://127.0.0.1/wordpress/readme.html on your browser to read some instruction.

4. Create MySQL database and user for WordPress

mysql -u root -p
mysql> use mysql;
mysql> create database wordpress;
mysql> INSERT INTO user (Host,User,Password) VALUES('localhost','wpuser',PASSWORD('wppass'));
mysql> grant all privileges on wordpress.* to wpuser@localhost;
mysql> flush privileges;
mysql> exit;

5. chmod -c 777 -R ~/wordpress

6. Type http://127.0.0.1/wordpress/wp-admin/install.php to install.
If you got this error message: "Error establishing a database connection", make sure user name and password are correct. It took me almost an hour to figure it out. For some reason, my MySQL password for wpuser@localhost is empty instead of a specified password that I set when I create a MySQL user account.

Running ASP.net on Ubuntu 11.04 using Apache 2 web server

1.1 Install the mod_mono packages:
sudo apt-get install libapache2-mod-mono mono-apache-server2

1.2 Install the mono development tools packages:
sudo apt-get install mono-devel (optional)

2. Enable the Apache module:
sudo a2enmod mod_mono_auto

3. Restart Apache: sudo /etc/init.d/apache2 restart

To test your setup, you can create a test page with the following content anywhere that Apache can see (i.e. /var/www/test.aspx)

References:
https://help.ubuntu.com/community/ModMono
http://www.mono-project.com/Mod_mono
http://ubuntuexperiment.wordpress.com/2009/01/29/running-aspnet-applications-in-ubuntu-using-modmono/
http://thelinuxexperiment.com/uncategorized/setting-up-an-ubuntu-based-asp-net-server-with-mono/
http://www.hbyconsultancy.com/blog/install-asp-net-3-5-environment-for-ubuntu-maverick-10-10.html

Git vs Subversion (SVN)

Git and Subversion (SVN) are free and open source version control software. I'm planning to replace Microsoft Visual SourceSafe in Microsoft Windows system. I need a modern open source version control system can use in both platform Linux and Microsoft Windows.

Which one is better?