Daily coding tips and tricks, C#, ASP.NET, .NET, SQL

Friday 7 June 2013

Adding Splash Screen and a Start-up Icon in Your iOS Web App

Here is the detailed documentation on how to add a splash screen to your web app.

1) For Start-Up Screen

while your home page loads in the background, iOS will display a startup screen.

iOS comes with a built-in function called "launch image".

iPhone 4/4S supports a higher screen resolution (what so called Retina Display). In order to support both screen resolution of older iPhone models and latest models, you have to prepare two versions of splash screen images of these sizes:

320 x 480 (for iPhone 2G / 3G / 3GS)
640 x 960 (for iPhone 4 / 4S)

The splash screen image should be in PNG format. By default, you should name the image file for lower screen resolution as “Default.png”.

Below is the code to enable splash screen:

<link rel="apple-touch-startup-image" href="images/boot.png" />

Start-up Image will only work if it has this line:

Below are the different sizes you will need for iPad/iPhone/iPod etc.

This is the link for detailed information: Home screen icons and startup screens

The output will be:

2) For Home Screen Icon :

Put this tag in between <head></head> tags.

<link rel="apple-touch-icon" href="/timentry2.jpg" />

The Image size must be of (57 x 57)

You can also put multiple Images for different resolution of Iphone as below:

Then

How to find Column Name and it's Data Type in Sql Server

Following will show you the column list with their datatype of a table in SQL Server.

select col.name as 'ColumName',typ.name as 'DataType' from sys.columns col left join sys.types typ
on col.system_type_id=typ.system_type_id  where object_id=object_id('login')

That will show you the result as below:

Tuesday 28 May 2013

What are Generics in C#?

Generics is the implementation of parametric polymorphism. Using parametric polymorphism, a method or data type can be written generically so that it can deal equally well with objects of various types. It is a way to make a language more expressible, while still maintaining full static type-safety.

Why use generics?

There are mainly two reasons to use generics. These are:

Performance – Collections that store objects use Boxing and Unboxing on data types. This uses a significant amount of overhead, which can give a performance hit. By using generics instead, this performance hit is removed.

Type safety – There is no strong type information at compile time as to what is stored in the collection.

Wednesday 22 May 2013

How to make the text or word blink?

You can use <Blink></Blink> tag in HTML to make the word or text blink but in is not supported in all the browser.

If you want the blink to work, you will have to write some javascript code to accomplish that by turning on and off the visibility of the element with setInterval.

And then the word to be blinked should be as follow:

Hi, I am blinking

Hi, I am blinking

Sunday 14 April 2013

How Compilation in .NET works.?

Compilation in .Net

What is Common Language Runtime (CLR).?

CLR works like a virtual machine in executing all languages.

All .NET languages must obey the rules and standards imposed by CLR. Examples:

Object declaration, creation and use
Data types,language libraries
Error and exception handling
Interactive Development Environment (IDE)

Development

Deployment

CLS is a set of specifications that language and library designers need to follow

This will ensure interoperability between languages

Friday 12 April 2013

C# Evolution

I summarized all the key features into a C# Evolution Matrix for your reference as below diagram shows:

Daily coding tips and tricks, C#, ASP.NET, .NET, SQL - Programming Tips and Tricks

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