Innovative Perspective

Javascript Files can’t be registered when using RegisterClientScriptResource in Custom Controls

Posted in .Net, AJAX, ASP.NET, Javascript, Tips, Web by mohammednour on February 4, 2010

I was trying to embed javascript file in a custom web control. I add the following line code in RenderControls method of the control.

Page.ClientScript.RegisterClientScriptResource(typeof(SampleCalendar), "TestWeb.Files.test.js");

When I tested a page containing the control, I realized the script is not registered. After investigation, I have found that I need to add this line of code in PreRender event of the control not in the RenderControls method (which make sense!)

Resolution: The POP3 failed to retrieve the authentication type and cannot continue

Posted in Uncategorized by mohammednour on January 28, 2010

When you try to create a new POP3 mailboxes, you may get this error: “The POP3 failed to retrieve the authentication type and cannot continue”. You may not be able also to run the POP3 Sever and got an error saying the service is stoped unexpectedly.

This may happen because you have installed the active directory after installing the “Email Services”. To resolved this issue, remove the “Email Services” from the installed Windows Components and then reinstall it.

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HTTP Error 500 – Internal server error When Running ASP on IIS 5

Posted in Uncategorized by mohammednour on July 9, 2009

This is a problem I recently have on my machine. I was trying to run ASP on IIS 5 and getting HTTP 500 internal server error. When checking the event logger, I have found this message in the application log:

DCOM got error “The referenced account is currently locked out and may not be logged on to. ” and was unable to logon .\IWAM_MYMACHINENAME in order to run the server:{3D14228D-FBE1-11D0-995D-00C04FD919C1}

To resolve this issue, you will have to delete IWAM_YOURMACHINENAME user from your machine and then reboot it (This user is responsible of the anonymous access on IIS for out of process applications). The user will be automatically created after restarting. Then reset IIS and try to run your ASP script again. It should be working now.

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Best Employers in Middle East 2009

Posted in Software Industry, Surveys by mohammednour on June 14, 2009

In the last November 2008, Hewitt – a provider of HR outsourcing and consulting services – launches the Best Employers in Middle East 2009 study. The results have been published. An Egyptian IT company got a place in the list – Microsoft Egypt. You can check the study results here.

Resolution: The Underlying Connection Was Closed

Posted in .Net, ASP.NET, Tips, Web by mohammednour on March 27, 2009

You usually got this exception when trying to use System.Net.HttpWebRequest class in .NET 1.1 for creating internal URL calls from your ASP.NET code. The exception is also reproducible when trying to invoke webservices using the proxy class.

By default, there is two concurrent connections in every ASP.NET application. As ASP.NET is a service it may require more than two concurrent connections to handle the requests. When you try to request URL from your ASP.NET code, ASP.NET may not be able to handle it. The solution is to increase the number of the concurrent connections which ASP.NET can handle. You can do so by modifying the “connectionManagement” element in the configuration file. For more information about the problem and its resolution, check this post.

yEd Graph Editor Replacement For Visio

Posted in Tools by mohammednour on March 23, 2009

yEd by yWorks is a very nice graphical editor which can be considered a very perfect replacement for Visio. The tool is very simple and provide most of the functionalities of Microsoft Visio. It doesn’t provide a very large collection of graph types like in Visio but at least it provides the most used and popular ones. You can create UML diagrams, flowcharts, block diagrams, networks and more. You can have glassy figures, rounded corners, curves, edges and shadows. Although, it’s a Java tool, I didn’t find it slow or heavy in loading. It’s a very powerful graph editor tool and it really worth a try: Download yEd Graph Editior

MIX09 Sessions Videos

Posted in Events, Web by mohammednour on March 20, 2009

MIX09 is a Web Design and Development Conference which is considered one of the most popular events for web professionals. The conference this year has already been launched in the last March 18th and will end in March 20th. To catchup with the event, you can watch the sessions through this link: MIX09 Sessions

[Update] 29th March, 2009
MIX stuff collected all their videos in one page: Click Here

[Update] 21st March, 2009
Guy Burstein collected all the sessions in his blog post and made available for download. So that you can watch MIX09 videos offline: Download MIX09 Sessions and Watch Offline

Software Security

Posted in Events, Security, Web by mohammednour on March 20, 2009

In the world of Facebook, E-Commerce and Email; modern threats have emerged exploiting application level vulnerabilities more than ever, A simple bug in a web or desktop application could lead to hundreds thousands dollars loss and sensitive information disclosure. Hence the need for security measures on the application level.

The CuttingEdge Club will organize a two hours session to discover the modern applications threats together with the mitigation techniques, discussing the different activities that should be done throughout the different phase of the software development life cycle to end with a more secure software.

The session will be in Wednesday 25th March, 2009 – 5:30 PM, ITWorx – Free Zone. The speaker is Ahmed Saafan, Information Security Engineer, Raya Security Services.

CuttingEdgeClub is an ITWorx technical seminar club for technology enthusiasts. Its mission is to provide an easy gateway to pertinent and updated technology information for a growing audience in a simple, pragmatic and accessible way.

Blocking IP Addresses Using MMC

Posted in Security, Tips, Tools by mohammednour on March 18, 2009

I was searching for a solution to block any communication with specific IP addresses. I have come to this solution using MMC (Microsoft Management Console). The following steps will allow you to block any communication – whatever the protocol is – with specific IP addresses or subnet:

1. Open Start Manu > Run > Write “MMC”. Then press Enter.
2. In the Management Console > File > Add/Remove Snap-in…
3. In the opened dialog, leave “Local Computer” as it’s and click “Finish”.

4. You will have a new node in the left tree called: “IP Secuirty Policies in Local Computer”.
5. Right click on this node and select “Create IP Security Policy”.
6. In the opened dialog, write “Block IP”.
7. Click Next till the end of the wizard and then “Finish”.
8. You will have an item in the left pane called: “Block IP”. Right click on it and select “Properties”.

9. In the opened dialog, click “Add”.
10. Go through the wizard, till you reach a step called: “IP Filter List”.
11. Click “Add”. IP Filter Dialog will open.

12. Modify the name of your IP Filter and click “Add” to add an IP filter policy.
13. Click “Next. Leave “Source Address” as “My IP Address”.
14. In the destination address, you can select “A specific IP Address”. You can also filter by DNS or subnet. Enter the IP address to block. Then click Next.

15. Leave the protocol to be “Any” and click “Next”.
16. Then click “Finish”.
17. Apply all changes, and close all the opened windows. You may have to add “Block” action if it doesn’t exist.
18. After you finish, don’t forget to write click on “Block IP” policy and select “Assign”.

Now try to ping the blocked IP addresses. You should get “Destination Unreachable” message.

Maintenance Plans in SQL Server

Posted in SQL Server, Tips, Tools by mohammednour on March 17, 2009

Creating backups for your database is an essential task in every environment especially for critical data storage. But have you ever ask yourself how to create your backups in a periodic manner – say every week or so? If you was able to do so, how will you manage the space in your disk? Maybe you don’t want to keep any backup files older than one month.

The first solution you may think about is to create a SQL script and execute it in a custom job. But wait, SQL Server can do it for you and save alot of this implementation hassle. In the SQL Server, you have the option to create “Maintenance Plan” for your database. This plan provides you with more advanced options for creating backups for the data and the transactions logs.

When you create a new plan, you will have to go through a configuration wizard. The interesting part is in the backup configurations. You can provide how often you want to backup your database (i.e every week, month or so). You also specify how long you want to keep the backup files and when to remove it (i.e You may remove any backups older than one month) so that you save your storage space. Another interesting point, you can create only one plan for more than one database. The plan can be configured also to create a separate backup folder for each database.

The maintenance plan is a periodic task which needs a running job. This is why it requires a running SQL Server Agent in your database server.