this pointer

[Guest]

Hi All,

In vb.net. why can't a object be accessed within its event handler, uisng
'this' pointer?

Are there any alternatives to using 'this'?

kd

 

[Herfried K. Wagner [MVP]]

In vb.net. why can't a object be accessed within its event handler, uisng
'this' pointer?

Use 'Me' instead of 'this'.

 

[Guest]

Me - refers to the form name and not the current object name.

kd

 

[Herfried K. Wagner [MVP]]

Me - refers to the form name and not the current object name.

'Me' does exactly the same what 'this' does in C++, Java, and C#. Inside an
event handler you can get a reference to the control raising the event in
the value passed to the handler's 'sender' parameter:

\\\
Public Sub Button1_Click(...)...
Dim SourceControl As Button = DirectCast(sender, Button)
SourceControl.Enabled = False
...
End Sub
///

 

[Ken Tucker [MVP]]

Hi,

Me refers to the current object. Which some times is a form. It
is the same as the c++ and c# this statement.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vblr7/html/vakeyme.asp

Ken
---------------

Me - refers to the form name and not the current object name.

kd

 

[Cor Ligthert]

KD,

"Me" is the same as in C# "this". It is used in the class not in the
object.

In javascript it is often used as a passed reference to an object, that kind
of "this" you can use in VBNET in the same way as you do it in javascript,
something as

\\\\
dim dt as datatable = new datatable()
dt.columns.Add("hello")
dt.rows.Add(dt)

function mysub(byval this as datatable)
return this.NewRow
end function.
///

I hope this helps

Cor