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  • How can I reuse my javascript code between client and server?

    - by Chris Farmer
    I have some javascript code that includes an ANTLR-generated lexer and parser, and some associated syntax tree evaluation functionality. This code runs in the browser in my web app to support users who author code snippets which process scientific data. Now I'd like to do some additional background processing on the server using the same generated parser. I would prefer not to have to re-implement this stuff in C# and have multiple bits of code that did the exact same thing. Performance isn't as critical to me as eliminating duplication, since this is a background process. So, how can I call into my javascript code from C#? And how can I format my script so that it plays nicely with my .NET web app?

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  • Typical size of unit tests compared to test code

    - by Frank Schwieterman
    I'm curious what a reasonable / typical value is for the ratio of test code to production code when people are doing TDD. Looking at one component, I have 530 lines of test code for 130 lines of production code. Another component has 1000 lines of test code for 360 lines of production code. So the unit tests are requiring roughly 3x to 5x as much code. This is for Javascript code. I don't have much tested C# code handy, but I think for another project I was looking at 2x to 3x as much test code then production code. It would seem to me that the lower that value is, assuming the tests are sufficient, would reflect higher quality tests. Pure speculation, I just wonder what ratios other people see. I know lines of code is an loose metric, but since I code in the same style for both test and production (same spacing format, same ammount of comments, etc) the values are comparable.

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  • C# Code Smells. What are the most common and how to fix them?

    - by Carlos Loth
    Hi, One thing I'd like to hear from you guys is what are the code smells that you see most often happen on C# code and how to fix them. I'm working on defining a code-review process for my team and I'd like to include a section with the most common C# code smells and a possible fix for each of them. I'd like the assistance of the community on that, so others can reuse this list for further reference. What are the most common smells you have seen on C# code? How did you fix them?

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  • Performance Impact of Generating 100's of Dynamic Methods in Ruby?

    - by viatropos
    What are the performance issues associated with generating 100's of dynamic methods in Ruby? I've been interested in using the Ruby Preferences Gem and noticed that it generates a bunch of helper methods for each preference you set. For instance: class User < ActiveRecord::Base preference :hot_salsa end ...generates something like: user.prefers_hot_salsa? # => false user.prefers_hot_salsa # => false If there are 100's of preferences like this, how does this impact the application? I assume it's not really a big deal but I'm just wondering, theoretically.

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  • Can I make my drives visible and change their partition type without losing my data?

    - by user165408
    I have made a lot of mistakes and now I cannot see my hard disk nor I can start my operating system on my laptop. All my passwords and important files on my hdd without any backup. I followed this course of action Changed my hard disk partitions to dynamic just for getting 5th partition. (1st mistake) Decreased partitions to 4 again. Backed up operating system from 4th to 3rd partition with Norton Ghost. Booted from a live CD for Windows XP. Formatted 4th partition and moved my all important data from 1st and 2nd partitions to the 4th partition. Deleted 1st and 2nd partitions and got 1 partition from half of empty space. So I have just 3 partitions and empty space between 1st and 2nd partitions. Tried to install Windows 8 to the first partition but it did not allow because it is dynamic. Also it did not allow to install to other partitions. Tried to install Windows XP to the 1st partition but it said if I continue I cannot use other drivers. Therefore I escaped from installing it. Booted from the Windows XP live CD then increased 1st partiton to less than 400mb of empty space. Therefore I thought it will be adjacent but it was shown as 2 partitions. In my computer I see just 3 drivers. Using Norton Ghost I recovered my OS to the 1st partition. (2nd mistake it was on 4th partition originally) Booted from a Windows XP live CD I tried to install bcdedit to the Windows XP live CD but it did not work. Then I tried to install EaseUS Partition Master Home Edition. It was installed with errors then I start it and it showed me an error like there is no hard disk. I looked to my PC and my drivers were not there. Booted from the Norton Ghost CD and it did not show me my drivers either, but before I was able to see them. I checked numbers of partition shown by the Norton Ghost utility and they are still have same numbers so I have to see my drivers but I cannot see them now. My hard disk is shown as extarnal dynamic now so I cannot see any drive in my PC in the live Windows XP. There are two options; first one is import extarnal disk and second one is convert disk to basic. Will they delete my data? I fear booting from CDs like Windows XP live CD, Norton Ghost CD, and the operating system CD/DVD, because they may overwrite a few MB their data to my data. These recover tools are already exist in Windows XP live CD by The Ultimate Boot CD for Windows. Can any of them help me? CompuAppa SwissKnife V3 DBXtract Disk Investigator Fab's AutoBackup 2.0 FileRecovery Floppy Repair Free Undelete Handy Recovery Recovery Manager Restorastion Restorastion Help File by UBCD4Win UnChk Unstoppable Copier Finally How can I make it so that my drives are visible again without losing my data? How can I convert my dynamic partitions to basic without losing my data?

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  • Multiple CodeSnippet in an XML .snippet file

    - by Frinavale
    I'm attempting to supplement the help features for my code by providing other developers with code snippets. These produce skeletons of code which demonstrate how to use/call my classes or methods. I've created a .snippet file and have placed it in the "%Visual Studio Folder%\Code Snippets\Visual Basic\My Snippets" folder. I've used the Code Snippets Manager and ensured that it included this folder so that I can access the snippets. Everything works well when I have 1 CodeSnippet tag within the root CodeSnippets tag.... When I add more than one CodeSnippet tag to the file (each with their own title, and their own code example) I'm experiencing something strange. The first CodeSnippet I've added contains code for adding something to my system, the second contains code for editing something in my system, and the third deleting something from the system. When I use the code snippet by right clicking and selecting "Insert Code Snippet", only the first code snippet in the file shows up as an option. When I select it, the code in the first CodeSnippet is inserted....but so is the code within the other CodeSnippet tags. Do you have to have a separate XML .snippet file for each code snippet you want to make available? After reading through MSDN about creating Code Snippets I was under the impression that this could all be done within one file. It seems that I'm not understanding something very basic here and would love to find the answer but apparently Code Snippets are under used so finding the answer has proven to be a little trickier than I first thought it would be. Thanks, -Frinny

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  • Firefox add-on development: Register global dynamic custom keyboard shortcuts

    - by dezwart
    I have been tasked with developing a Firefox add-on that is capable of registering global keyboard shortcuts (ones that will work throughout all areas of Firefox) that will open up the side-bar and execute an XMLRPC request based on previously recorded input. The idea here is that there will be many potential XMLRPC requests that the user will want to execute via a keyboard shortcut. Currently, the add-on is capable of handling pre-defined static keyboard shortcuts via the Firefox overlay. What I would like to achieve, is to allow the user to register their own dynamic custom keyboard shortcut. There is an add-on that currently has some of this functionality, called Keyconfig. I'm not keen on having to ask users to install a second add-on to define their own shortcuts. It also seems that using the dynamic keyboard shortcut registration method in Keyconfig would require the user to close all Firefox windows before the dynamic shortcut is made available. What I would like to know is: Is an XPCOM component the best way to register dynamic keyboard shortcuts from within a Firefox add-on? Is there a way to register the keyboard shortcut so that it is immediately available to all Firefox windows, without having to close the windows beforehand?

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  • PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/json.so' undefined symbol: ZVAL_DELREF

    - by crmpicco
    I have an issue where I am unable to use JSON, which would appear to be because of the following error. There is another thread on this forum this touches on a similar issue, but it's not quite the same. I am using CentOS 5.6 and have the following pear packages installed: [crmpicco@eq-www-php53 ~]$ pear list PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/json.so' - /usr/lib64/php/modules/json.so: undefined symbol: ZVAL_DELREF in Unknown on line 0 Installed packages, channel pear.php.net: ========================================= Package Version State Archive_Tar 1.3.7 stable Auth_SASL 1.0.2 stable Console_Getopt 1.3.1 stable Image_Barcode 1.1.2 stable Mail 1.1.14 stable Net_SMTP 1.2.10 stable Net_Socket 1.0.8 stable PEAR 1.9.4 stable Structures_Graph 1.0.4 stable XML_RPC 1.5.4 stable XML_Util 1.2.1 stable json 1.2.1 stable and have the following PHP packages installed: [crmpicco@eq-www-php53 ~]$ yum list installed | grep php php.x86_64 5.3.10-1.w5 installed php-cli.x86_64 5.3.10-1.w5 installed php-common.x86_64 5.3.10-1.w5 installed php-devel.x86_64 5.3.10-1.w5 installed php-gd.x86_64 5.3.10-1.w5 installed php-ldap.x86_64 5.3.10-1.w5 installed php-mcrypt.x86_64 5.3.10-1.w5 installed php-mysql.x86_64 5.3.10-1.w5 installed php-pdo.x86_64 5.3.10-1.w5 installed php-pear.noarch 1:1.9.4-1.w5 installed php-pear-Net-Socket.noarch 1.0.8-1.el5.centos installed php-soap.x86_64 5.3.10-1.w5 installed php-xml.x86_64 5.3.10-1.w5 installed The error: [crmpicco@eq-www-php53 ~]$ php -v PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/json.so' - /usr/lib64/php/modules/json.so: undefined symbol: ZVAL_DELREF in Unknown on line 0 PHP 5.3.10 (cli) (built: Feb 2 2012 23:23:12) Copyright (c) 1997-2012 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies My repolist reads as: [crmpicco@eq-www-php53 ~]$ yum repolist Loaded plugins: changelog, fastestmirror Excluding Packages in global exclude list Finished repo id repo name status base CentOS-5 - Base 3,548+43 epel Extra Packages for Enterprise Linux 5 - x86_64 6,815+156 extras CentOS-5 - Extras 245+23 rpmforge Red Hat Enterprise 5 - RPMforge.net - dag 11,016+67 updates CentOS-5 - Updates 233 webtatic Webtatic Repository 5 - x86_64 211+183 repolist: 22,068 I am getting HTTP 500 errors everywhere that I use JSON so my application is non functional right now.

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  • Using dd-wrt Dynamic DNS client with CloudFlare

    - by Roman
    I'm trying to configure Dynamic DNS client on my router with dd-wrt (v24-sp2) firmware so it would dynamically change IP address in one of the DNS records. Unfortunately I encountered a problem… Here is an example request from their ddclient configuration: https://www.cloudflare.com/api.html?a=DIUP&u=<my_login>&tkn=<my_token>&ip=<my_ip>&hosts=<my_record> It works if I use it in browser, but in dd-wrt I get this output: Tue Jan 24 00:36:47 2012: INADYN: Started 'INADYN Advanced version 1.96-ADV' - dynamic DNS updater. Tue Jan 24 00:36:47 2012: I:INADYN: IP address for alias '<my_record>' needs update to '<my_ip>' Tue Jan 24 00:36:48 2012: W:INADYN: Error validating DYNDNS svr answer. Check usr,pass,hostname! (HTTP/1.1 303 See Other Server: cloudflare-nginx Date: Mon, 23 Jan 2012 14:36:48 GMT Content-Type: text/plain Connection: close Expires: Sun, 25 Jan 1981 05:00:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Location: https://www.cloudflare.com/api.html?a=DIUP&u=<my_login>&tkn=<my_token>&ip=<my_ip>&hosts=<my_record> Vary: Accept-Encoding Set-Cookie: __cfduid=<id>; expires=Mon, 23-Dec-2019 23:50:00 GMT; path=/; domain=.cloudflare.com Set-Cookie: __cfduid=<id>; expires=Mon, 23-Dec-2019 23:50:00 GMT; path=/; domain=.www.cloudflare.com You must include an `a' paramiter, with a value of DIUP|wl|chl|nul|ban|comm_news|devmode|sec_lvl|ipv46|ob|cache_lvl|fpurge_ts|async|pre_purge|minify|stats|direct|zone_check|zone_ips|zone_errors|zone_agg|zone_search|zone_time|zone_grab|app|rec_se URL from "Location" works perfectly and parameter "a" is included. What's the problem?

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  • What is New in ASP.NET 4.0 Code Access Security

    - by HosamKamel
    ASP.NET Code Access Security (CAS) is a feature that helps protect server applications on hosting multiple Web sites, ASP.NET lets you assign a configurable trust level that corresponds to a predefined set of permissions. ASP.NET has predefined ASP.NET Trust Levels and Policy Files that you can assign to applications, you also can assign custom trust level and policy files. Most web hosting companies run ASP.NET applications in Medium Trust to prevent that one website affect or harm another site etc. As .NET Framework's Code Access Security model has evolved, ASP.NET 4.0 Code Access Security also has introduced several changes and improvements.   A Full post addresses the new changes in ASP.NET 4.0 is published at Asp.Net QA Team Here http://weblogs.asp.net/asptest/archive/2010/04/23/what-is-new-in-asp-net-4-0-code-access-security.aspx

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  • Convert OpenGL code to DirectX

    - by Fredrik Boston Westman
    First of all, this is kind of a follow up question on @byte56 excellent anwser on this question concerning picking algorithms. I'm trying to convert one of his code examples to directX 11 however I have run into some problems ( I can pick but the picking is way off), and I wanted to make sure I had done it right before moving on and checking the rest of my code. I am not that familiar with openGl but I can imagine openGl has different coordinations systems, and functions that alters how you must implement to code a bit. The getPickRay function on the answer linked is what I'm trying to convert. This is the part of my code that I think is giving me trouble when converting from openGl to directX Because I'm unsure on how their different coordination systems differs from one another. PRVecX = ((( 2.0f * mouseX) / ClientWidth ) - 1 ) * tan((viewAngle)/2); PRVecY = (1-(( 2.0f * mouseY) / ClientHeight)) * tan((viewAngle)/2); Another thing that I am unsure about is this part: XMVECTOR worldSpaceNear = XMVector3TransformCoord(cameraSpaceNear, invMat); XMVECTOR worldSpaceFar = XMVector3TransformCoord(cameraSpaceFar, invMat); A couple of notes: The mouse coordinates are already converted so that the top left corner of the client window would be (0,0) and the bottom right (800,600) ( or whatever resolution you would have) The viewAngle is the same angle that I used when setting the camera view with XMMatrixPerspectiveFovLH. I removed the variables aspectRatio and zoomFactor because I assumed that they were related to some specific function of his game. To summarize it up to questions : Does the openGL coordination system differ in such a way that this equation in the first of my code examples wouldn't be valid when used in DirectX 11 ( with its respective screen coordination system)? Is the openGL method Matrix4f.transform(a, b, c) equal to the directX method c = XMVector3TransformCoord(b,a)? (where a is a matrix and b,c are vectors). Because I know when it comes to matrices order is important.

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  • Setup Reverse DNS with Cpanel and WHM?

    - by m3d
    I needed to set-up a reverse DNS via cpanel. I followed the steps in this tutorial but it didn't work: http://docs.cpanel.net/twiki/bin/view/11_30/WHMDocs/RdnsForBind. I use my own name servers registered with go-daddy. But I am with VPS hosting company. I did use a new serial number and exactly as the tutorial however didnt seems to be working When I check this via windows nslookup {ip-address} I still get the my hosting company name, when reversed.

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  • Enable Automatic Code First Migrations On SQL Database in Azure Web Sites

    - by Steve Michelotti
    Now that Azure supports .NET Framework 4.5, you can use all the latest and greatest available features. A common scenario is to be able to use Entity Framework Code First Migrations with a SQL Database in Azure. Prior to Code First Migrations, Entity Framework provided database initializers. While convenient for demos and prototypes, database initializers weren’t useful for much beyond that because, if you delete and re-create your entire database when the schema changes, you lose all of your operational data. This is the void that Migrations are meant to fill. For example, if you add a column to your model, Migrations will alter the database to add the column rather than blowing away the entire database and re-creating it from scratch. Azure is becoming increasingly easier to use – especially with features like Azure Web Sites. Being able to use Entity Framework Migrations in Azure makes deployment easier than ever. In this blog post, I’ll walk through enabling Automatic Code First Migrations on Azure. I’ll use the Simple Membership provider for my example. First, we’ll create a new Azure Web site called “migrationstest” including creating a new SQL Database along with it:   Next we’ll go to the web site and download the publish profile:   In the meantime, we’ve created a new MVC 4 website in Visual Studio 2012 using the “Internet Application” template. This template is automatically configured to use the Simple Membership provider. We’ll do our initial Publish to Azure by right-clicking our project and selecting “Publish…”. From the “Publish Web” dialog, we’ll import the publish profile that we downloaded in the previous step:   Once the site is published, we’ll just click the “Register” link from the default site. Since the AccountController is decorated with the [InitializeSimpleMembership] attribute, the initializer will be called and the initial database is created.   We can verify this by connecting to our SQL Database on Azure with SQL Management Studio (after making sure that our local IP address is added to the list of Allowed IP Addresses in Azure): One interesting note is that these tables got created with the default Entity Framework initializer – which is to create the database if it doesn’t already exist. However, our database did already exist! This is because there is a new feature of Entity Framework 5 where Code First will add tables to an existing database as long as the target database doesn’t contain any of the tables from the model. At this point, it’s time to enable Migrations. We’ll open the Package Manger Console and execute the command: PM> Enable-Migrations -EnableAutomaticMigrations This will enable automatic migrations for our project. Because we used the "-EnableAutomaticMigrations” switch, it will create our Configuration class with a constructor that sets the AutomaticMigrationsEnabled property set to true: 1: public Configuration() 2: { 3: AutomaticMigrationsEnabled = true; 4: } We’ll now add our initial migration: PM> Add-Migration Initial This will create a migration class call “Initial” that contains the entire model. But we need to remove all of this code because our database already exists so we are just left with empty Up() and Down() methods. 1: public partial class Initial : DbMigration 2: { 3: public override void Up() 4: { 5: } 6: 7: public override void Down() 8: { 9: } 10: } If we don’t remove this code, we’ll get an exception the first time we attempt to run migrations that tells us: “There is already an object named 'UserProfile' in the database”. This blog post by Julie Lerman fully describes this scenario (i.e., enabling migrations on an existing database). Our next step is to add the Entity Framework initializer that will automatically use Migrations to update the database to the latest version. We will add these 2 lines of code to the Application_Start of the Global.asax: 1: Database.SetInitializer(new MigrateDatabaseToLatestVersion<UsersContext, Configuration>()); 2: new UsersContext().Database.Initialize(false); Note the Initialize() call will force the initializer to run if it has not been run before. At this point, we can publish again to make sure everything is still working as we are expecting. This time we’re going to specify in our publish profile that Code First Migrations should be executed:   Once we have re-published we can once again navigate to the Register page. At this point the database has not been changed but Migrations is now enabled on our SQL Database in Azure. We can now customize our model. Let’s add 2 new properties to the UserProfile class – Email and DateOfBirth: 1: [Table("UserProfile")] 2: public class UserProfile 3: { 4: [Key] 5: [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)] 6: public int UserId { get; set; } 7: public string UserName { get; set; } 8: public string Email { get; set; } 9: public DateTime DateOfBirth { get; set; } 10: } At this point all we need to do is simply re-publish. We’ll once again navigate to the Registration page and, because we had Automatic Migrations enabled, the database has been altered (*not* recreated) to add our 2 new columns. We can verify this by once again looking at SQL Management Studio:   Automatic Migrations provide a quick and easy way to keep your database in sync with your model without the worry of having to re-create your entire database and lose data. With Azure Web Sites you can set up automatic deployment with Git or TFS and automate the entire process to make it dead simple.

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  • DNS servers not set properly? Site failing to load by hostname, though loads fine by IP

    - by Crashalot
    We run www.tekiki.com. Some users, including us, cannot reach www.tekiki.com because of DNS issues. The site resolves fine on the desktop, but it fails from our iPhones and iPads. This doesn't happen to everyone. We noticed the problem yesterday, then set our DNS servers to Cloudflare's DNS servers, hoping that would fix things. Accessing the site by IP addr loads the site fine. Two questions: 1) Does anyone know what the solution is? 2) Should we use other DNS servers besides Cloudflare?

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  • Tellago & Tellago Studios at Microsoft TechReady

    - by gsusx
    This week Microsoft is hosting the first edition of their annual TechReady conference. Even though TechReady is an internal conference, Microsoft invited us to present a not one but two sessions about some our recent work. We are particularly proud of the fact that one of those sessions is about our SO-Aware service registry. We see this as a recognition to the growing popularity of SO-Aware as the best Agile SOA governance solution in the Microsoft platform. Well, on Tuesday I had the opportunity...(read more)

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  • Back from Teched US

    - by gsusx
    It's been a few weeks since I last blogged and, trust me, I am not happy about it :( I have been crazily busy with some of our projects at Tellago which you are going to hear more about in the upcoming weeks :) I was so busy that I didn't even have time to blog about my sessions at Teched US last week. This year I ended up presenting three sessions on three different tracks: BIE403 | Real-Time Business Intelligence with Microsoft SQL Server 2008 R2 Session Type: Breakout Session Real-time business...(read more)

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  • Should I implement BackBone.js into my ASP.NET WebForms applications?

    - by Walter Stabosz
    Background I'm trying to improve my group's current web app development pattern. Our current pattern is something we came up with while trying to rich web apps on top of ASP.NET WebForms (none of us knew ASP.NET MVC). This is the current pattern: ! Our application is using the WinForms Framework. Our ASPX pages are essentially just HTML, we use almost no WebControls. We use JavaScript/jQuery to perform all of our UI events and AJAX calls. For a single ASPX page, we have a single .js file. All of our AJAX calls are POSTs (not RESTful at all) Our AJAX calls contact WebMethods which we have defined in a series of ASMX files. One ASMX file per business object. Why Change? I want to revise our pattern a bit for a couple of reasons: We're starting to find that our JavaScript files are getting a bit unwieldy. We're using a hodgepodge of methods for keeping our local data and DOM updates in sync. We seem to spend too much time writing code to keep things in sync, and it can get tricky to debug. I've been reading Developing Backbone.js Applications and I like a lot of what Backbone has to offer in terms of code organization and separation of concerns. However, I've gotten to the chapter on RESTful app, I started to feel some hesitation about using Backbone. The Problem The problem is our WebMethods do not really fit into the RESTful pattern, which seems to be the way Backbone wants to consume them. For now, I'd only like to address our issue of disorganized client side code. I'd like to avoid major rewrites to our WebMethods. My Questions Is it possible to use Backbone (or a similar library) to clean up our client code, while not majorly impacting our data access WebMethods? Or would trying to use Backbone in this manner be a bastardization of it's intended use? Anyone have any suggestions for improving our pattern in the area of code organization and spending less time writing DOM and data sync code?

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  • Tellago && Tellago Studios 2010

    - by gsusx
    With 2011 around the corner we, at Tellago and Tellago Studios , we have been spending a lot of times evaluating our successes and failures (yes those too ;)) of 2010 and delineating some of our goals and strategies for 2011. When I look at 2010 here are some of the things that quickly jump off the page: Growing Tellago by 300% Launching a brand new company: Tellago Studios Expanding our customer base Establishing our business intelligence practice http://tellago.com/what-we-say/events/business-intelligence...(read more)

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  • DonXml does WCF in NYC

    - by gsusx
    Tomorrow is WCF day in New York city!!!!! My good friend and Tellago's CTO Don Demsak will be doing a session WCF Data and RIA Services at the WCF fire-starter event to be hosted at the Microsoft offices in New York city. Don has a encyclopedic knowledge of both technologies and will be sharing lots of best practices learned from applying these technologies in large service oriented environments. In addition to Don, my crazy Cuban friend Miguel Castro will also be presenting three sessions at the...(read more)

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  • Dream.In.Code Podcast 15 with Michael Crump

    - by mbcrump
    I was recently interviewed by Dennis Delimarsky for his podcast titled “Dream.In.Code”. We talked for about an hour on all things Silverlight and Windows Phone 7. Dennis asked a lot of great questions and I thoroughly enjoyed chatting with him. Check out the interview and let me know what you think. Listen to the podcast. Dream.In.Code Website Thanks again to Dream In Code for this opportunity.  Subscribe to my feed

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  • Chicago Code Camp Call For Speakers

    - by Tim Murphy
    The Chicago Code Camp is coming up on May 1st, 2010.  They are still looking for speaker.  If you have a rock’n code demonstration that you would like to present to the community be sure to sign up.  If you know someone else who has some ideas that you really think they should share with the world guilt them in to signing up.  http://www.chicagocodecamp.com/ del.icio.us Tags: Chicago Code Camp,call for speakers

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  • Writing C# Code Using SOLID Principles

    - by bipinjoshi
    Most of the modern programming languages including C# support objected oriented programming. Features such as encapsulation, inheritance, overloading and polymorphism are code level features. Using these features is just one part of the story. Equally important is to apply some object oriented design principles while writing your C# code. SOLID principles is a set of five such principles--namely Single Responsibility Principle, Open/Closed Principle, Liskov Substitution Principle, Interface Segregation Principle and Dependency Inversion Principle. Applying these time proven principles make your code structured, neat and easy to maintain. This article discusses SOLID principles and also illustrates how they can be applied to your C# code.http://www.binaryintellect.net/articles/7f857089-68f5-4d76-a3b7-57b898b6f4a8.aspx 

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  • Two domains, two servers, one dynamic IP address

    - by giantman
    I have two domains hi.org and bye.net and one dynamic IP address and two servers. I want to attach one domain bye.net to server1 and hi.org to server2. I'm using Apache wamp 2.0i. I have two servers behind one router with a dynamic IP address #httpd.conf file additions <IfModule mod_proxy.c> ProxyRequests Off <Proxy *> Order deny,allow Allow from all </Proxy> </IfModule> #vhost file additions NameVirtualHost *:80 #default <VirtualHost *:80> DocumentRoot "c:/wamp/www/fallback" </VirtualHost> # Server 1 <VirtualHost *:80> DocumentRoot "c:/wamp/www" ServerName h**p://bye.net ServerAlias bye.net </VirtualHost> # Server 2 <VirtualHost *:80> ProxyPreserveHost On ProxyPass / h**p://192.168.1.119/ DocumentRoot "g:/wamp/www" ServerName h**p://hi.org ServerAlias hi.org </VirtualHost> After doing all this I fallback to server1 only I don't get the page hi.org I only get the page bye.net, I don't even get the default fallback page which gets executed when a person enters IP address but not the domain name. I use Windows 7 (server 2) and Windows XP (server 1) UPDATE: I needed to remove DocumentRoot "g:/wamp/www" line :D it was there by mistake! things are working fine now. But one thing: the URL gets replaced by the local ip address any way to not make that happen?

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  • Task-It Webinar - Source Code

    Last week I presented a webinar called "Building a real-world application with RadControls for Silverlight 4". For those that didn't get to see the webinar, you can view it here: Building a read-world application with RadControls for Silverlight 4 Since the webinar I've received several requests asking if I could post the source code for the simple application I showed demonstrating some of the techniques used in the development of Task-It, such as MVVM, Commands and Internationalization. This source code is now available for downloadhere. After downloading the source: Extract it to the location of your choice on your hard-drive Open the solution Right-click ModuleProject.Web and selecte 'Set as StartUp Project'. Right-click ProjectTestPage.aspx and selected 'Set as Start Page' Create a database in SQL Server called WebinarProject. Navigate to the Database folder under the WebinarProject directory and run the .sql script against your WebinarProject database. The last two steps are necessary only for the Tasks page to work properly (using WCF RIA Services). Now some notes about each page: Code-behind This is not the way I recommend coding a line-of-business application in Silverlight, but simply wanted to show how the code-behind approach would look. Command This page introduces MVVM and Commands. You'll notice in the XAML that the Command property of theRadMenuItem and the Button are both bound to a SaveCommand. That comes from the view model. If you look in the code- behind of the user control you'll see that an instance of a CommandViewModel is instantiated and set as the DataContext of the UserControl.There is also a listener for the view model's SaveCompleted event. When this is fired, it tells the view (UserControl) to display the MessageBox. Internationalization This sample is similar to the previous one, but instead of using hard-coded strings in the UI, the strings are obtained via binding toview model properties. The view model gets the strings from the .resx files (Strings.resx or Strings.de.resx) under Assets/Resources. If you uncomment the call to ShowGerman() in App.xaml.cs's Application_Startup method and re-run the application, you will see the UI in German. Note that this code, which sets the CurrentCulture and CurrentUICulture on the current thread to "de" (German) is for testing purposes only. RadWindow Once again, very similar to the previous example.The difference is that we are now using a RadWindow to display the 'Saved' message instead of a MessageBox. The advantage here is that we do not have to hold on to a reference to the view model in our code behind so that we can get the 'Saved' message from it. The RadWindow's DataContext is now also bound to the view model, so within its XAML we can bind directly to properties in the view model. Much nicer, and cleaner. One other thing I introduced in this example is the use of spacer Rectangles. Rather than setting a width and/or height on the rectangles for spacing, I am now referencing a style in my ResourceDictionary called StandardSpacerStyle. I like doing this better than using margins or padding because now I have a reusable way to create space between elements, the Rectangle does not show (because I have not set its Fill color), and I can change my spacing throughout the user interface in one place if I'd like. Tasks This page is quite a bit different than the other four. It is a very simple, stripped-down version of the Tasks page in the Task-It application. The Tasks.xaml UserControl has a ContentControl, and the Content of that control is set based on whether we are looking at the list of tasks or editing a task. So it displays one of two child UserControls, which are called List and Details. List has the RadGridView, Details has the form. In the code-behind of the Tasks UserControl I am once again setting its DataContext to a view model class. The nice thing is, whichever child UserControl is being displayed (List or Details) inherits its DataContext from its parent control (Tasks), so I do not have to explicitly set it. The List UserControl simply displays a RadGridView whose ItemsSource is bound to a property in the view model called Tasks, and its SelectedItem property is bound to a property in the view model called SelectedItem. The SelectedItem binding must be TwoWay so that the view is notified when the SelectedItem changes in the view model, and the view model is notified when something changes in the view (like when a user changes the Name and/or DueDate in the form). You'll also notice that the form's TextBox and RadDatePicker are also TwoWay bound to the SelectedItem property in the view model. You can experiment with the binding by removing TwoWay and see how changes in the form do not show up in the RadGridView. So here we have an example of two different views (List and Details) that are both bound to the same view model...and actually, so is the Tasks UserControl, so it is really three views. WCF RIA Services By the way, I am using WCF RIA Services to retrieve data for the RadGridView and save the data when the user clicks the Save button in the form. I created a really simple ADO.NET Entity Data Model in WebinarProject.Web called DataModel.edmx. I also created a simple Domain Data Service called DataService that has methods for retrieving data, inserting, updating and deleting. However I am only using the retrieval and update methods in this sample. Note that I do not currently have any validation in place on the form, as I wanted to keep the sample as simple as possible. Wrap up Technically, I should move the calls to WCF RIA Services out of the view model and put them into a separate layer, but this works for now, and that is a topic for another day! Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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