Reference dynamically created control by name

[mef526]

I would like to reference a dynamically created control and I know the name.
I would like to use the following:

Dim strName as String = "txtControl 1"
' This is the ".Name" used when textbox was dynamically created

dim c as control = me.Controls(str Name)

Instead I have to do this:

Public Function ControlByName _
(ByVal strName As String _
, ByVal ctrlCol As Windows.Forms.C ontrol.ControlC ollection _
) As Control
If ctrlCol Is Nothing Then Return Nothing
For Each c As Control In ctrlCol
If c.Name = strName Then Return c
Next
Return Nothing
End Function

dim c as control = ControlByName(s tr, Me.Controls)
Isn't there a better way???

+++++++++++++++ +++++++++++++++ +++++++++++++++ ++

Next Item:

When cloning a control I do something like this:

For Each c0 As Control In t0.Controls
Dim c As System.Windows. Forms.Control
Select Case c0.GetType.ToSt ring
Case "System.Windows .Forms.TextBox"
c = New TextBox
CType(c, TextBox).TextAl ign = CType(c0, TextBox).TextAl ign
strText = c.Text
Case "System.Windows .Forms.Label"
c = New Label
CType(c, Label).TextAlig n = CType(c0, Label).TextAlig n
strText = c.Text
Case "System.Windows .Forms.ComboBox "
c = New ComboBox
For Each p As Object In CType(c0, ComboBox).Items
CType(c, ComboBox).Items .Add(p)
Next
CType(c, ComboBox).Selec tedItem = CType(c0, ComboBox).Selec tedItem
strText = CStr(CType(c0, ComboBox).Selec tedItem)
End Select
c.Visible = True 'c0.Visible '<- BUG IN CONTROL
Next

Note the last line: I have to set ".Visible" to true since the c0 has the
wrong value as retreived from the control collection. Is this a bug or is it
something I'm doing???

Is it because ">Visible" is really
c0.Visible = (c0.Parent.Pare nt.Visible AND c0.Parent.Visib le AND c0.Visible)

[Cor Ligthert]

Mef,

When you want this it is in my opinion easier to create a hashtable where
you place the name in the key and the reference to the control in the value.

http://msdn.microsoft.com/library/de...classtopic.asp

I hope this helps?

Cor

"mef526" <me****@discuss ions.microsoft. com>

I would like to reference a dynamically created control and I know the
name.
I would like to use the following:

Dim strName as String = "txtControl 1"
' This is the ".Name" used when textbox was dynamically created

dim c as control = me.Controls(str Name)

Instead I have to do this:

Public Function ControlByName _
(ByVal strName As String _
, ByVal ctrlCol As Windows.Forms.C ontrol.ControlC ollection _
) As Control
If ctrlCol Is Nothing Then Return Nothing
For Each c As Control In ctrlCol
If c.Name = strName Then Return c
Next
Return Nothing
End Function

dim c as control = ControlByName(s tr, Me.Controls)
Isn't there a better way???

+++++++++++++++ +++++++++++++++ +++++++++++++++ ++

Next Item:

When cloning a control I do something like this:

For Each c0 As Control In t0.Controls
Dim c As System.Windows. Forms.Control
Select Case c0.GetType.ToSt ring
Case "System.Windows .Forms.TextBox"
c = New TextBox
CType(c, TextBox).TextAl ign = CType(c0, TextBox).TextAl ign
strText = c.Text
Case "System.Windows .Forms.Label"
c = New Label
CType(c, Label).TextAlig n = CType(c0, Label).TextAlig n
strText = c.Text
Case "System.Windows .Forms.ComboBox "
c = New ComboBox
For Each p As Object In CType(c0, ComboBox).Items
CType(c, ComboBox).Items .Add(p)
Next
CType(c, ComboBox).Selec tedItem = CType(c0, ComboBox).Selec tedItem
strText = CStr(CType(c0, ComboBox).Selec tedItem)
End Select
c.Visible = True 'c0.Visible '<- BUG IN CONTROL
Next

Note the last line: I have to set ".Visible" to true since the c0 has the
wrong value as retreived from the control collection. Is this a bug or is
it
something I'm doing???

Is it because ">Visible" is really
c0.Visible = (c0.Parent.Pare nt.Visible AND c0.Parent.Visib le AND
c0.Visible)

[Herfried K. Wagner [MVP]]

"mef526" <me****@discuss ions.microsoft. com> schrieb:

I would like to reference a dynamically created control
and I know the name.

Accessing controls by their names or indices
<URL:http://dotnet.mvps.org/dotnet/faqs/?id=controlbyna meindex&lang=en >

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

[Cor Ligthert]

Herfried,

That recursive method is I thought one which I created and showed the first
time in this newsgroups in this way (it is a little bit changed however not
basicly).

I avoided that expresly in this case because with dynamicly created controls
the hasttable is in my opinion better when the controls are not already
placed in an array of controls ( as I do because in that case because I can
add the handlers as well in a loop).

In that case it is finding the name just looping through that array.

Cor

"Herfried K. Wagner [MVP]" <hi************ ***@gmx.at>

"mef526" <me****@discuss ions.microsoft. com> schrieb:

I would like to reference a dynamically created control
and I know the name.

Accessing controls by their names or indices
<URL:http://dotnet.mvps.org/dotnet/faqs/?id=controlbyna meindex&lang=en >

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

[mef526]

Thank you for your answer

I think that the method I am now using will work best given that the
ControlContaine r in the code, a TabPage, only has 5 items. It is dynamically
created as a clone of the selected TabPage.

What about Item 2:
Note the last line: I have to set ".Visible" to true since the c0 has the
wrong value as retreived from the control collection. Is this a bug or is it
something I'm doing???

Is it because ".Visible" is really
c0.Visible = (c0.Parent.Pare nt.Visible AND c0.Parent.Visib le AND c0.Visible)
"Cor Ligthert" wrote:

Herfried,

That recursive method is I thought one which I created and showed the first
time in this newsgroups in this way (it is a little bit changed however not
basicly).

I avoided that expresly in this case because with dynamicly created controls
the hasttable is in my opinion better when the controls are not already
placed in an array of controls ( as I do because in that case because I can
add the handlers as well in a loop).

In that case it is finding the name just looping through that array.

Cor

"Herfried K. Wagner [MVP]" <hi************ ***@gmx.at>

"mef526" <me****@discuss ions.microsoft. com> schrieb:

I would like to reference a dynamically created control
and I know the name.

Accessing controls by their names or indices
<URL:http://dotnet.mvps.org/dotnet/faqs/?id=controlbyna meindex&lang=en >

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

[Cor Ligthert]

Mef526

When I understand your message right, than I think that I have nothing to
disagree with you. (You can set an "exit for", when you think on more
controls than 5 when found, which needs a little bit change of the "then"
clause). I do not like that inline thens so maybe that is the reason I do
that directly.

:-)

Cor
"mef526" <me****@discuss ions.microsoft. com>

Thank you for your answer

I think that the method I am now using will work best given that the
ControlContaine r in the code, a TabPage, only has 5 items. It is
dynamically
created as a clone of the selected TabPage.

What about Item 2:
Note the last line: I have to set ".Visible" to true since the c0 has the
wrong value as retreived from the control collection. Is this a bug or is
it
something I'm doing???

Is it because ".Visible" is really
c0.Visible = (c0.Parent.Pare nt.Visible AND c0.Parent.Visib le AND
c0.Visible)
"Cor Ligthert" wrote:

Herfried,

That recursive method is I thought one which I created and showed the
first
time in this newsgroups in this way (it is a little bit changed however
not
basicly).

I avoided that expresly in this case because with dynamicly created
controls
the hasttable is in my opinion better when the controls are not already
placed in an array of controls ( as I do because in that case because I
can
add the handlers as well in a loop).

In that case it is finding the name just looping through that array.

Cor

"Herfried K. Wagner [MVP]" <hi************ ***@gmx.at>

> "mef526" <me****@discuss ions.microsoft. com> schrieb:
>> I would like to reference a dynamically created control
>> and I know the name.
>
> Accessing controls by their names or indices
> <URL:http://dotnet.mvps.org/dotnet/faqs/?id=controlbyna meindex&lang=en >
>
> --
> Herfried K. Wagner [MVP]
> <URL:http://dotnet.mvps.org/>
>
>

[mef526]

I'm not sure I understand your reply so let em explain my thought- the
COntrolCOnainer that is serched only HAS 5 items in it so the search would
not be too bad, probably this is FASTER than using a hash, since there are so
few items.

What about the .Visible property?

Is it read differently than set?

"Cor Ligthert" wrote:

Mef526

When I understand your message right, than I think that I have nothing to
disagree with you. (You can set an "exit for", when you think on more
controls than 5 when found, which needs a little bit change of the "then"
clause). I do not like that inline thens so maybe that is the reason I do
that directly.

:-)

Cor
"mef526" <me****@discuss ions.microsoft. com>

Thank you for your answer

I think that the method I am now using will work best given that the
ControlContaine r in the code, a TabPage, only has 5 items. It is
dynamically
created as a clone of the selected TabPage.

What about Item 2:
Note the last line: I have to set ".Visible" to true since the c0 has the
wrong value as retreived from the control collection. Is this a bug or is
it
something I'm doing???

Is it because ".Visible" is really
c0.Visible = (c0.Parent.Pare nt.Visible AND c0.Parent.Visib le AND
c0.Visible)
"Cor Ligthert" wrote:

Herfried,

That recursive method is I thought one which I created and showed the
first
time in this newsgroups in this way (it is a little bit changed however
not
basicly).

I avoided that expresly in this case because with dynamicly created
controls
the hasttable is in my opinion better when the controls are not already
placed in an array of controls ( as I do because in that case because I
can
add the handlers as well in a loop).

In that case it is finding the name just looping through that array.

Cor

"Herfried K. Wagner [MVP]" <hi************ ***@gmx.at>
> "mef526" <me****@discuss ions.microsoft. com> schrieb:
>> I would like to reference a dynamically created control
>> and I know the name.
>
> Accessing controls by their names or indices
> <URL:http://dotnet.mvps.org/dotnet/faqs/?id=controlbyna meindex&lang=en >
>
> --
> Herfried K. Wagner [MVP]
> <URL:http://dotnet.mvps.org/>
>
>

[Cor Ligthert]

Mef,

That performance is where I did mean that I cannot disagree with that when
we are talking about 5 items.

However it did seem to me a kind of generic function and therefore I added
something more..

Than to complete it to get it about the visible property.

You made it in my opinion as a generic search function . Normally this would
be done as this.
\\\
For Each ctr As Control In ctrlPar.control s
If ctr.Name = strName Then
ctr.visible = false
exit for
end if
Next
///

Using your functions it can be something as
\\\\
dim c as control = ControlByName(" mycontrolname", Panel1.controls )
if Not c Is Nothing then
c.visible = false
end if
////

All is typed in this message so watch typos.

I hope this helps?

Cor

"mef526" <me****@discuss ions.microsoft. com>

I'm not sure I understand your reply so let em explain my thought- the
COntrolCOnainer that is serched only HAS 5 items in it so the search would
not be too bad, probably this is FASTER than using a hash, since there are
so
few items.

What about the .Visible property?

Is it read differently than set?

"Cor Ligthert" wrote:

Mef526

When I understand your message right, than I think that I have nothing to
disagree with you. (You can set an "exit for", when you think on more
controls than 5 when found, which needs a little bit change of the "then"
clause). I do not like that inline thens so maybe that is the reason I do
that directly.

:-)

Cor
"mef526" <me****@discuss ions.microsoft. com>

> Thank you for your answer
>
> I think that the method I am now using will work best given that the
> ControlContaine r in the code, a TabPage, only has 5 items. It is
> dynamically
> created as a clone of the selected TabPage.
>
> What about Item 2:
> Note the last line: I have to set ".Visible" to true since the c0 has
> the
> wrong value as retreived from the control collection. Is this a bug or
> is
> it
> something I'm doing???
>
> Is it because ".Visible" is really
> c0.Visible = (c0.Parent.Pare nt.Visible AND c0.Parent.Visib le AND
> c0.Visible)
>
>
> "Cor Ligthert" wrote:
>
>> Herfried,
>>
>> That recursive method is I thought one which I created and showed the
>> first
>> time in this newsgroups in this way (it is a little bit changed
>> however
>> not
>> basicly).
>>
>> I avoided that expresly in this case because with dynamicly created
>> controls
>> the hasttable is in my opinion better when the controls are not
>> already
>> placed in an array of controls ( as I do because in that case because
>> I
>> can
>> add the handlers as well in a loop).
>>
>> In that case it is finding the name just looping through that array.
>>
>> Cor
>>
>> "Herfried K. Wagner [MVP]" <hi************ ***@gmx.at>
>> > "mef526" <me****@discuss ions.microsoft. com> schrieb:
>> >> I would like to reference a dynamically created control
>> >> and I know the name.
>> >
>> > Accessing controls by their names or indices
>> > <URL:http://dotnet.mvps.org/dotnet/faqs/?id=controlbyna meindex&lang=en >
>> >
>> > --
>> > Herfried K. Wagner [MVP]
>> > <URL:http://dotnet.mvps.org/>
>> >
>> >
>>
>>
>>