Comments on: C# 3.0 Tutorials: Implicitly typed local variables

By: Nik Radford

Nik Radford — Tue, 17 Jun 2008 12:24:16 +0000

Here’s a question, unfortunately I don’t have VS2008 at hand to test it with.

Now this is not great code but I just thought about

Lets say, for the sake of hypothesising

I have an interface called IMyInterface, I have an object called MyObject that implement IMyInterface.

I have a function that has a return type IMyInterface, but actually returns an instantiated MyObject.

I initialize my var with the return of this function.

for brevity and in pseudo I do this.

var myVar = MyFunction();

does myVar become of type IMyInterface or of type MyObject when I’m dealing with it?

I’m pretty sure visual studio will treat it as IMyInterface, because it’ll look up the return type of the function called in order to provide intellisense. But as to the compiler? hmm… I’ll have to test that. My Expectation would be IMyInterface, and if it wasn’t it’d be bad not to treats as IMyInterface, but it certainly provides food for thought.

By: Michael Sync

Michael Sync — Thu, 22 May 2008 08:08:06 +0000

Can you show me your LINQ code? Normally, you can check the count of var..
e.g.

Option #1.
selectedProduct.resultView.Count

Option #2.

bool isFound = false;

var selPdt = LINQ;

foreach(var i in selPdt){
isFound = true;
}

if(isFound){
//DoSomething
}

By: ahtesham

ahtesham — Thu, 22 May 2008 05:14:58 +0000

lets say i have store the values from linq store procedure into var
var selectedProduct= storeProcedure of linq
now i want to see if selectedProduct is null or empty
i tried with
selectedProduct==null
selectedProduct.returnValue=null
selectedProduct.returnValue.tostring()==string.empty
but none worked
so any suggestion that tell me that that var is empty or null or do not have any value
thanks in advance

By: C# 3.0 Tutorials: Implicitly typed local variables

C# 3.0 Tutorials: Implicitly typed local variables — Thu, 13 Mar 2008 16:39:11 +0000

[...] Original post by Michael Sync [...]

By: Wöchentliche Rundablage: ASP.NET MVC, ASP.NET, Windows Live, Silverlight 2, LINQ, C# 3.0, CardSpace… | Code-Inside Blog

Mon, 03 Mar 2008 19:21:40 +0000

[...] C# 3.0 Tutorials: Implicitly typed local variables [...]

By: thinzar - သဥၹာ

thinzar - သဥၹာ — Mon, 03 Mar 2008 05:35:34 +0000

Now i’m following this tutorial series. Thanks for the great tutorials!! I have worked on C#, like one and a half year ago. Just take over other ppl’s project without digging all these basics grounds of C#. What a lazy programmer I hv been! These are tutorials which indeed helpful to me. Waiting for the later episodes…

By: Michael Sync

Michael Sync — Sun, 02 Mar 2008 03:46:05 +0000

Sorry, but I don’t understand the meaning.

thanks for your comment. What I meant by that is that the type of implicitly-typed local variable will be changed based on what you initialize to that variable. For example: var myvar = 1; myvar is not an object or variable. myvar is integer data type since you have initialized the value “1″ to that variable..

hope you understand about that. feel free to let me know if you are still not clear about that.

By: Zlatko Filipovski

Zlatko Filipovski — Sat, 01 Mar 2008 23:01:05 +0000

“That type of that variable will be changed the actual type based on what you have assigned to that variable”
Sorry, but I don’t understand the meaning.
By the way, nice blog.

By: Michael Sync » C# 3.0 Tutorials with Visual Studio 2008 for Beginners

Michael Sync » C# 3.0 Tutorials with Visual Studio 2008 for Beginners — Sat, 01 Mar 2008 15:41:56 +0000

[...] Implicitly typed local variables [...]