Vbscript|vbscript Create objects
When you create an object type (Class) in VBScript, you first have to know that it's really easy! I self-study in an afternoon, just read the Microsof VB Script reference book, but must admit that this book is not the easiest document to read.
Beginners need to install the VBScript 5.0 engine, which can be downloaded at the Microsoft ' s scripting site.
Let's look at the code. The definition of a class is very similar to a function and a child procedure. The Start behavior class <myclassname>, ending with End class, all object definitions written in the intermediary department. Now we can build the first class with what we've learned and not implement any functional classes.
Class 4GuysTestObject
End Class
This doesn't seem to be the case, but when you write the following code, you create an instance of the object:
Dim Objtestobject
Set Objtestobject = New 4GuysTestObject
Set Objtestobject = Nothing
Obviously, we can't do anything with objects right now, and now I'm going to explain how to define properties and methods in the object.
The most basic thing you can do with an object is to create a set of data. For example, if you want to set up a time, date, and video program title, you can create an object that contains the attributes "StartTime", "Programdate", and "Programtitle". The code is as follows:
Class Tvprogram
Public StartTime
Public programdate
Public Programtitle
End Class
Dim Objtvshow
Set objtvshow = New Tvprogram
Objtvshow.starttime = CDate ("17:30")
Objtvshow.programdate = DateSerial (1999,9,17)
Objtvshow.programtitle = "The Jerry Springer Show"
Response.Write Objtvshow.programtitle & "are on" & _
Objtvshow.starttime & "on" & Objtvshow.programdate
The way the code works is that we define the properties of Starttime,programdate and Programtitle as Class Tvprogram. In this way, these properties are processed like other variables, and the code is not executed without a set value. The public field before the property name has its true meaning and is very important. If you do not specifically refer to a method or property as public or private, the system defaults to public, but it is best to develop a good writing habit that defines any value (and also facilitates your own reading later).
The results of the above program are roughly as follows (depends on your local server configuration):
The Jerry Springer show are on 17/09/99 in 5:30pm.
I am in England, so the date is realistic as above. No matter what project you run, it works fine, but only if you start using the functions of other objects, create a perfect interface for all the information and functionality you might need, to support the entities that surround you, and you will realize the real power of the object.
Now, if you don't like the way the above example shows a date, and you want to have a realistic date in the same format, and you don't need to add formatdatetime () to each programdate attribute, you just embed the code into the attribute itself.
This requires a different method to define the attribute. Again, we will use programdate for externally visible properties, but because the Programdate property becomes a function instead of a static value, we save the actual date in another property internal_programdate.
Class Tvprogram
Public StartTime
Public internal_programdate
Public Property Get Programdate
Programdate = Day (internal_programdate) & _
"" & MonthName (Month (internal_programdate)) & _
"" & Year (Internal_programdate)
End Property
Public Programtitle
End Class
Dim Objtvshow
Set objtvshow = New Tvprogram
Objtvshow.starttime = CDate ("17:30")
Objtvshow.internal_programdate = DateSerial (1999,9,17)
Objtvshow.programtitle = "The Jerry Springer Show"
Response.Write Objtvshow.programtitle & "are on" & _
Objtvshow.starttime & "On" & Objtvshow.programdate & "."
The results of the procedure are as follows:
The Jerry Springer Show are on September 1999 5:30pm.
Thanks for Sophie's translation
If you have questions, welcome to http://www.showc.com.
