[RESOLVED] OOP classes question about inheritance , Special Case in Here !!

Dear all,
i have a situation in which i loop through the controls of a form.

i need to get the controls who is inherited from textbox or is a textbox itself

i have tried the following code

VB Code:

for each ctl as control in frmx.controls
if typeof ctl is textbox then
'do something
end if
next

this code works only for original textbox controls, but if i have controls that inherits from the textbox, it won't be collected

so i tried other code, like this

VB Code:

for each ctl as control in frmx.controls
if ctl.gettype.isassignablefrom(gettype(textbox)) then
' do something
end if
next

this give me only the inherited , not both !!!

i have also tried this code

VB Code:

for each ctl as control in frmx.controls
  If ctl.GetType.BaseType Is (GetType(textBox)) Then
  'do anything
  End If
next

this code works for only the inherited controls, but the original textbox do not work.

how can i set a condition to gather all textboxes and all controls who inherits from textbox. i dont want to use and / or operators as the code already is very heavy and complicated and recursive. it is driving me crazy already :confused:


thx in advance

VB Code:

for each ctl as control in frmx.controls
if typeof ctl is textbox OrElse ctl.gettype.isassignablefrom(gettype(textbox)) then
'do something
end if
next

oh nevermind.... Just finished reading the end

Why not add them together with an OR or an OrElse?

If control is textbox OR control is assignable from textbox then

**EDIT - same edit as mpdeglau :)

here is your one liner ;)

VB Code:

For Each ctl As Control In Me.Controls
            If GetType(TextBox).IsInstanceOfType(ctl) Then
                messagebox.show(ctl.Name)
            End If
        Next

Quote:

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here is your one liner

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thaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaank you

i knew the soltuion is possible



thank you again kleinma :thumb: