Vikram Lakhotia Blog on Asp.Net, Dot Net, SQL, VIsual Studio, C# etc

Hi,

One of the best new things in the new Dot net 3.5 is the LINQ. LNQ stands for Language Integrated Query. With the help of LINQ now we can query nearly anything in a more than efficient manner. It also gives us compile time check to the inline query’s, which reduces the chances of runtime error.

A simple query of the LINQ start with the “from” clause and ends with the select clause. This is quite opposite of what we are used to in the SQL (where we have the select clause first and from clause later). Below is the simple example of a Linq Query.

var t = from c in BlogBLL.Categories

               select c;

Here I am selecting all the categories from the data context BlogBLL. The BlogBLL is a data context that contains the mapping of all the tables. If we want to

Hi,

I have been using the new Orcas Beta 2 and dot net frame work for some time now and have been really enjoying the features of the C Sharp. One of the new features also includes Anonymous types. It first thought there might not be much use of this feature and will only be a syntactic sugar for us. But after playing with Dot net framework 3.5 for a while I understand the importance of this new feature. Let me also tell that this feature will be most useful in case you are querying through the new LINQ (Language Integrated Query).

With the help of the anonymous types we can define a type without declaring it from before hand. The main difference between the defined types and anonymous types is that we leave the type name in the anonymous types. The compiler will parse the syntax and create a standard CLR type itself for the definition of the type. Here is an example of an anonymous type.

var blog =  new

Hi,

Now when I have started working on dot net 3.5 the feature I love most is the extension method. I know many of you will be surprised that it’s not LINQ or the other new feature that are there in visual studio but this one. Well let me tell you how it let me code the way I want to (without leaving me to the limitation of the C sharp).

The kind of coder I am I use the Response.write() a lot. Whenever debugging some problem, for each response I have to add this line. But with extension methods I can add a new extension method to the object class to get this done pretty easily (and make my code look better).

Here is a simple extension method I created to help me out.

public static void Response(this object obj)

{
       Response.write (obj);
}

Now I do not have to write Response.Write.

Hi,

Yesterday I was working and found that one of my projects was not responding from time to time for some unknown error. The problem was intranet (some network problem with database server). We were loosing connection from time to time. But I wanted to keep a check if the site is running or not. So what I basically wanted was a check if the site was working fine by some other entity, which would tell me when there is problem with the web site.  

Hence I decided to make a small windows application that would check for a given URL at the given difference of time and would report back if the site is responding. I found it very useful so thought of sharing with all.

The main work that had to be done was to make a request to the site and check if the response status code is 202 (That is the status code when the site is running fine). Here is the code on how this was done.

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