GotFocus

Is there a way to override the gotfocus event for all textboxes on the form in one method. I can write one and then attach Handles for gotfocus for all textboxes, but inside that I still have to check

if text1 then do this ...
if text2 then do this ...

while they will all be doing the same thing .. eg; change in backcolor.

is there a way so I do not have to check the textboxes. And if future if somebody else adds another textbox, it will be taken care of automaticallty without touching the code.

Use the Sender Object to figure out who is the one calling you, so

VB Code:

Sender.Backcolor = color.Red

For this to work, I will have to turn OFF option strict on all Files because when its on it does not allow late binding this way. I do not want to do this. Is there any other way ...

Something like

If TypeOf Sender IS TextBox Then
ctype(sender,textbox).BackColor=color.red
end if

or you can use directcast

Dim tb as textbox
If TypeOf Sender IS TextBox Then
tb=directcast(sender,textbox)
end if

I'm writing from memory, you have to check the exact syntax!
:D

Good job:)

Jeez, I did not know you could do Ctypin'g on the left side of =

tx...C

And you can't, in fact!;)
Biological memory is not very affordable, expecially because I always use directcast. On the computer I was using I could not to have a check....

This is working code:

VB Code:

Dim Tb As TextBox
        Dim Nome As String = "TxtImporto"
        Dim punta As Byte = 1 ' La prima è la textbox1
        Dim Totale As Double = 0
        Dim Ctr As Control
 
        Do While punta < 9
 
            For Each Ctr In Me.Controls
                If TypeOf Ctr Is TextBox Then
                    ' Se qui, è una TextBox
 
                    Tb = DirectCast(Ctr, TextBox)
 
                    If Tb.Name = Nome & punta.ToString Then
                        'Se qui è la textbox col nome voluto (TextBoxn dove n=punta)
                        If Not IsNumeric(Tb.Text) Then
                            Tb.Text = "0,00"
                        End If
 
                        Totale += Double.Parse(Tb.Text)
 
                    End If
 
                End If
            Next
            punta += 1
 
        Loop
 
'.......below it continues, but is not very interesting......

:wave:

i've got this since i don't have vs.net 2k3. i use textpad. :cry:

VB Code:

option strict on
imports system
imports system.drawing
imports system.windows.forms
public class sample
   inherits form
   
   sub new()
      mybase.new()
      initializecomponent()
   end sub   
   
   public withevents t1 as new textbox()
   public withevents t2 as new textbox()
   public withevents t3 as new textbox()
   sub initializecomponent()
      t1.setbounds(100,100,100,20)
      t2.setbounds(100,125,100,20)
      t3.setbounds(100,150,100,20)
      
      me.controls.addrange(new control(){t1,t2,t3})
      
      for each c as control in me.controls
         if typeof c is textbox then
            addhandler c.gotfocus, addressof t
            addhandler c.leave, addressof tt
         end if
      next
   end sub
   
   sub t(sender as object,e as eventargs)
      ctype(sender,textbox).backcolor=color.red
   end sub
   
   sub tt(sender as object,e as eventargs)
      ctype(sender,textbox).backcolor=color.white
   end sub
   
   shared sub main()
      application.run(new sample())
   end sub
end class

i do a vbc file.vb /r:system.dl,system.windows.forms.dll,system.drawing.dll :cry:

Quote:

---

Originally posted by spoiledkid
For this to work, I will have to turn OFF option strict on all Files because when its on it does not allow late binding this way. I do not want to do this. Is there any other way ...

---

I'm not quite sure what you are trying to do but even with Option Strict On you CAN do:

VB Code:

Dim ctr As Control
        For Each ctr In Controls
            If TypeOf ctr Is TextBox Then
                ctr.BackColor = Color.Red
            End If
 
        Next