Foyzul's diary on tech and life

Suppose I want to change the button color when it is clicked. And to do this task, I don’t want to send the page to the server. So, what should I do? Well, HTML DOM has given us some events to work with. We will use one the events, Click event and put some code on its event. The below code will change the button color if clicked on that. Now, if we want to add another button and apply same functionality with the click, the code will like below But if you look closely, we are repeating the code. This is the worst smell of the code smells . So, we should create a method and call that method from the click event. So, how do we create a function in Javascript? Its easy. As we did before, we must add the ‘script’ tag first. Inside of this tag, we will write the function. In javascript, we must write the word ‘function’ before the name of the function. For example: function MyFunctionName() { } Then we will call that function from the event. So, if we refac...

Now a days, the most basic thing a web application developer must know is Javascript. So, what is javascript? Yes..you probably know Javascript is nothing to do with Java. Javascript is totally different with Java. In syntax, in semantic, in usage, in all aspects. So, Javascript is a scripting language which runs in browser. The browser software executes the script line by line, from top to bottom, and display you the output. Now what you can guess, Javascript must be embedded in a HTML file and when the HTML codes are rendered/executed, Javascript codes get executed with those. If you want to let your browser know that you are writing a Javascript code, you must add some extra tags/codes with the statements. For example: What you can see, at the above code, by the ‘document.write’ method, we are writing some text in the browser. But we need to add the 'script' tag having the type as javascript with it. If the browser executes this line of code, we can view ‘ Javascri...

In one of my current project, I am using visual studio 2010. I need to show report for some features. Well, everything was going smoothly before i installed my Windows 7 again in last week. after installing visual studio 2010, I installed the crystal report executables provided by BusinessObjects . then i ran my project and tried to open the report. But unfortunately it was showing the following error "Could not load file or assembly 'file:///C:\Program files (x86)\Sap BusinessObjects\Crystal Reports For .Net Framework 4.0\Commom\Sap BusinessObjects Enterprise XI4.0\win32_x86\dotnet1\crdb_adoplus.dll' or one of its dependencies. The system cannot find the file specified." In enlarged mode: I have searched and found a solution. I just needed to put the useLegacyV2RuntimeActivationPolicy="true" into the          tag under tag.  And guess what? The report is not displaying like below: I am not sure why it is happening. I will write ...

Introduction Its very common that couple of developers are working on a single project. Me and one of my friend are also working on a .NET project. We are using LINQ to SQL class to query on the database. This is a desktop Windows Form project and we are maintaining our code as dumbest way possible. That is, when i update on any part, i just mail him the file and he replaces the file. So far so good. Problem statement But when I sent him my project, he couldn't run the database queries. Because the connection string embed on the DataContext.dbml class was not changed. He couldn't find a good way to change the connection string value. So I was searching for a better solution, and at last I found it today. Solution 1. Double click on the DBML file of your project.   2. Now right click on the work area of the DBML file (Start sign in the image) 3. Expand the connection property and check the Data Source value. in my case, it is 'Magicbox' since it is my machin...

What is it? The HTML DOM defines a standard way for accessing and manipulating HTML documents. The DOM presents an HTML document as a tree-structure. In the DOM, everything in an HTML document is a node. The DOM says: The entire document is a document node Every HTML element is an element node The text in the HTML elements are text nodes Every HTML attribute is an attribute node Comments are comment nodes Example Node tree: From the HTML above: The < html > node has no parent node; it is the root node The parent node of the < head > and < body > nodes is the < html > node The parent node of the "Hello world!" text node is the < p > node and: The < html > node has two child nodes; < head > and < body > The < head > node has one child node; the < title > node The < title > node also has one child node; the text node "DOM Tutorial" The < h1 > and < p > nodes are siblings, a...

ASP.NET MVC 3 has a built in feature for sub folders. That is called   Areas   (thanks @Morten for let me know the word). But after finishing the   MSDN Walkthrough   for Areas, I was still unable to run the web application. The error was showing   Configuration errors . Then I searched and found that, the   Web.config files in the sub folders shouldn't contain application specific properties . So, I removed those properties from the Web.config files. Then I was able to run. But there were some runtime errors when I wanted to navigate to my sub folder/area views. The error was   "Could not load type ‘System.Web.Mvc.ViewPage<..<>’"   when I click on the links for the views of the Areas folder.   Then I again searched and found helpful   this   post. And then my application successfully run and I can navigate all of the pages.