Download course VB : programming in ASP.NET

Download course VB : programming in ASP.NET 

As it was mentioned before, ASP.NET supports several languages such as VB.NET, C-Sharp and J-Script. In this section, we will discuss how VB.NET program structures are implemented in ASP.NET pages. Mainly, we will some examples.

Using Variables

Variables are used in all programming language to hold data during the run-time of a program. All variables are declared within the

            The contents of CapitalCityOfUk is:       

The contents of NumberOfStates is:      

The contents of IndependenceDay is: 

   

Using Various Data Types

VB.NET and hence the ASP.NET supports a variety of data types such as integer (short and long), decimal (single and double), char, string, date, Boolean, etc. Most of these data types can be used in arithmetic operations, comparison operations, and string concatenations.  The following is an example that declares few integer and decimal variables and performs a simple tax calculation.  Again, the page load event is used to perform the calculation, and there is no user interaction.

    

  Your total earnings after tax are $ 

    

   

Concatenating Strings

String concatenation is common in an ASP.NET page. The following codes show how strings can be combined or concatenated using & and + signs in two different ways. 

Example 1: Using values and & sign

strCombine = “Jack” & “ “ & “Jill”

The result when strCombine is displayed: Jack Jill

Example 2: Using Variables and & sign

Dim firstString As String

Dim secondString As String

Dim twoString As String

firstString = “I am a “

secondString = “graduate student“

twoString = firstString & secondString

The result when strCombine is displayed: I am a graduate student

 Arrays

ASP.NET also supports array data type. Thus multiple values of a particular data type can be stored in an array. Note that in VB.NEt array index starts with 0. Thus a 10-member array should be declared as 0-9. The following is an example of an one-dimensional array in which text values are read from three input boxes and are stored in an array. The function “CStr” is used to delete any empty spaces in the input texts and the texts are displayed.

 

       

       

       

   

Please enter your name:     

Please enter your address:   

textmode="multiline" />  

Please enter your chosen password:  

textmode="password" /> 

                                              

   

 

   

Control Structures

Various control structures are used in any programming language such as

·        If.. Then .. Else

·        Select Case

·        For ... Next

·        Do While ...

·        For .... Each.......

Download course VB : programming in ASP.NET