Development of Internet Application 1501CT - Sara Almudauh

Development of Internet Application 1501CT - Sara Almudauh
VBScript Part 1 Lecture 6 Sara Almudauh Development of Internet Application 1501CT - Sara Almudauh

VBScript is a Microsoft scripting language. VBScript is a light version of Microsoft's programming language Visual Basic. VBScript is the default scripting language in ASP (Active Server Pages). Development of Internet Application 1501CT - Sara Almudauh

VBScript on a Server When VBScript is used with ASP, the statement response.write() produces output. <html> <body> <%response.write("This is my first VBScript")%> </body> </html> Development of Internet Application 1501CT - Sara Almudauh

VBScript Variables A variable can have a short name, like x, or a more descriptive name, like carname. Rules for VBScript variable names: Must begin with a letter Cannot contain a period (.) Cannot exceed 255 characters In VBScript, all variables are of type variant, that can store different types of data. Development of Internet Application 1501CT - Sara Almudauh

Declaring (Creating) VBScript Variables
You can declare VBScript variables with the Dim, Public or the Private statement. Like this: Dim x Dim carname Development of Internet Application 1501CT - Sara Almudauh

Example <!DOCTYPE html> <html> <body> <% Dim firstname firstname=“Sara" response.write(firstname) response.write(" ") firstname=“Ahmed" response.write(firstname) %> </body> </html> Sara Ahmed Development of Internet Application 1501CT - Sara Almudauh

Example <!DOCTYPE html> <html> <body> <% Dim firstname firstname=“Sara” response.write(“your first name is :”&firstname) %> </body> </html> your first name is : Sara Development of Internet Application 1501CT - Sara Almudauh

VBScript Procedures VBScript has two kinds procedures: Sub procedure Function procedure Development of Internet Application 1501CT - Sara Almudauh

Sub Procedures A Sub procedure: is a series of statements, enclosed by the Sub and End Sub statements can perform actions, but does not return a value can take arguments Sub mysub() some statements End Sub Sub mysub(argument1,argument2) some statements End Sub or Development of Internet Application 1501CT - Sara Almudauh

Example <!DOCTYPE html> <html> <body> <% Sub mysub() response.write("I was written by a sub procedure") End Sub response.write("I was written by the script ") Call mysub() %> </body> </html> I was written by the script I was written by a sub procedure Development of Internet Application 1501CT - Sara Almudauh

VBScript Function Procedures
A Function procedure: is a series of statements, enclosed by the Function and End Function statements can perform actions and can return a value can take arguments that are passed to it by a calling procedure without arguments, must include an empty set of parentheses () returns a value by assigning a value to its name Development of Internet Application 1501CT - Sara Almudauh

VBScript Function Procedures
Function myfunction() some statements myfunction=some value End Function or Function myfunction(argument1,argument2) some statements myfunction=some value End Function Development of Internet Application 1501CT - Sara Almudauh

Example <!DOCTYPE html> <html> <body> <% Function myfunction() myfunction=Date() End Function response.write("Today's date: ") response.write(myfunction()) %> A Function procedure can return a result. </body> </html> Today's date: 2/22/2016 A Function procedure can return a result. Development of Internet Application 1501CT - Sara Almudauh

Calling a Procedure <!DOCTYPE html> <html> <body> <% Function myfunction(a,b) myfunction=a+b End Function response.write(myfunction(5,9)) %> </body> </html> 14 Development of Internet Application 1501CT - Sara Almudauh

Calling a Procedure When you call a procedure you can use the Call statement, like this: Call MyProc(argument) Or, you can omit the Call statement, like this: MyProc argument Development of Internet Application 1501CT - Sara Almudauh

VBScript Conditional Statements
In VBScript we have four conditional statements: If statement - executes a set of code when a condition is true If...Then...Else statement - select one of two sets of lines to execute If...Then...ElseIf statement - select one of many sets of lines to execute Select Case statement - select one of many sets of lines to execute Development of Internet Application 1501CT - Sara Almudauh

If you want to execute only one statement when a condition is true, you can write the code on one line: If i=10 Then response.write("Hello") If you want to execute more than one statement when a condition is true, you must put each statement on separate lines, and end the statement with the keyword "End If": If i=10 Then response.write("Hello") i = i+1 End If Development of Internet Application 1501CT - Sara Almudauh

There is no ..Else.. in the example above either. You just tell the code to perform multiple actions if the condition is true. If you want to execute a statement if a condition is true and execute another statement if the condition is not true, you must add the "Else" keyword: <!DOCTYPE html> <html> <body> <% i=hour(time) If i < 10 Then response.write("Good morning!") Else response.write("Have a nice day!") End If %> </body> </html> Good morning! Development of Internet Application 1501CT - Sara Almudauh

If...Then...ElseIf You can use the If...Then...ElseIf statement if you want to select one of many blocks of code to execute: <html> <body> <% i=hour(time) If i = 10 Then response.write("Just started...!") ElseIf i = 11 Then response.write("Hungry!") ElseIf i = 12 Then response.write("Ah, lunch-time!") ElseIf i = 16 Then response.write("Time to go home!") Else response.write("Unknown") End If %> </body> </html> Good morning! Development of Internet Application 1501CT - Sara Almudauh

Select Case You can also use the "Select Case" statement if you want to select one of many blocks of code to execute: d=weekday(Date) Select Case d Case 1 response.write("Sleepy Sunday") Case 2 response.write("Monday again!") Case 3 response.write("Just Tuesday!") Case 4 response.write("Wednesday!") Case 5 response.write("Thursday...") Case 6 response.write("Finally Friday!") Case Else response.write("Super Saturday!!!!") End Select %> Development of Internet Application 1501CT - Sara Almudauh

VBScript Looping In VBScript we have four looping statements: For...Next statement - runs code a specified number of times For Each...Next statement - runs code for each item in a collection or each element of an array Do...Loop statement - loops while or until a condition is true While...Wend statement - Do not use it - use the Do...Loop statement instead Development of Internet Application 1501CT - Sara Almudauh

For...Next Loop Use the For...Next statement to run a block of code a specified number of times. The For statement specifies the counter variable (i), and its start and end values. The Next statement increases the counter variable (i) by one. <html> <body> <% For i = 0 To 5 response.write("The number is " & i & " ") Next %> </body> </html> The number is 0 The number is 1 The number is 2 The number is 3 The number is 4 The number is 5 Development of Internet Application 1501CT - Sara Almudauh

Do...Loop If you don't know how many repetitions you want, use a Do...Loop statement. The Do...Loop statement repeats a block of code while a condition is true, or until a condition becomes true. Repeat Code While a Condition is True You use the While keyword to check a condition in a Do...Loop statement. Do While i>10 some code Loop Development of Internet Application 1501CT - Sara Almudauh

Read more about Loops in VB
Development of Internet Application 1501CT - Sara Almudauh

VBScript Examples Development of Internet Application 1501CT - Sara Almudauh

Display Date and Time <!DOCTYPE html> <html> <body> <% response.write("Today's date is " & Date()) response.write(" ") response.write("The time is " & Time()) %> </body> </html> Today's date is 2/22/2016 The time is 2:30:17 PM Development of Internet Application 1501CT - Sara Almudauh

Display Days <!DOCTYPE html> <html> <body> VBScripts' function WeekdayName is used to get a weekday: <% response.write("") response.write(WeekDayName(1)) response.write(" ") response.write(WeekDayName(2)) response.write("") response.write("Get the abbreviated name of a weekday:") response.write(" ") response.write(WeekDayName(1,True)) response.write(" ") response.write(WeekDayName(2,True)) response.write("") response.write("Get the current weekday:") response.write(" ") response.write(WeekdayName(weekday(Date))) response.write(" ") response.write(WeekdayName(weekday(Date), True)) response.write("") %> </body> </html> VBScripts' function WeekdayName is used to get a weekday: Sunday Monday Get the abbreviated name of a weekday: Sun Mon Get the current weekday: Monday Mon Development of Internet Application 1501CT - Sara Almudauh

Display the current month and day
<!DOCTYPE html> <html> <body> <% response.write("Today's day is " & WeekdayName(Weekday(Date))) response.write(" ") response.write("The month is " & MonthName(Month(Date))) %> </body> </html> Today's day is Monday The month is February Development of Internet Application 1501CT - Sara Almudauh

More Examples Development of Internet Application 1501CT - Sara Almudauh

Questions !!  Development of Internet Application 1501CT - Sara Almudauh

Development of Internet Application 1501CT - Sara Almudauh

Similar presentations

Presentation on theme: "Development of Internet Application 1501CT - Sara Almudauh"— Presentation transcript:

Similar presentations

About project

Feedback

Log in

Auth with social network:

Development of Internet Application 1501CT - Sara Almudauh

Similar presentations

Presentation on theme: "Development of Internet Application 1501CT - Sara Almudauh"— Presentation transcript:

Similar presentations

About project

Feedback