reference a control by string.

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nate axtell - 27 Oct 2004 18:19 GMT

I'm looking for a way to refernce a control by a string that represents the
name of the control. I dynamically create some textboxes, labels, and
comboboxes each name by a loop iteration index. (E.G.: "combo" & i) These
are added to the controls of a panel. How can I at a later time reference
these items in a panel by using "combo0", "combo1", etc... using a string
variable? An example would be the removal of one of the items from the
control. So far all I can find is:
Me.myPanel.Controls.Remove(myControl)
or
Me.myPanel..Controls.IndexOf(myControl)

Any suggestions?
thanks
nate

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Herfried K. Wagner [MVP] - 27 Oct 2004 18:27 GMT

"nate axtell" <naxtell at progeny dot net> schrieb:

> I'm looking for a way to refernce a control by a string
> that represents the name of the control.

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

Signature

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

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nate axtell - 27 Oct 2004 18:47 GMT

I was also hoping not to have to loop through all of the controls, so I
think I will use the HashTable or Array method that it suggests.
Thanks for the link.

Does anyone have another method?
nate

> "nate axtell" <naxtell at progeny dot net> schrieb:
>> I'm looking for a way to refernce a control by a string
>> that represents the name of the control.
>
> Accessing controls by their names or indices
> <URL:http://dotnet.mvps.org/dotnet/faqs/?id=controlbynameindex&lang=en>

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Charlie - 27 Oct 2004 18:47 GMT

Create a Hashtable

When you create the control, add it to the hashtable, using the name you
create as key.

When you need access to the control, you should declare a variable as the
control type and use directcast to cast it correctly.

When you create controls:
dim HT as new Hashtable
(in loop)
Dim Txt as new Textbox
...
HT.add("T1", Txt)
Dim Cbo ...
HT.add("C1", Cbo)

When you need to use a control:

Select Case HT("T1").gettype.name.tolower
Case "textbox"
Dim Txt as Textbox = Directcast(HT("T1"), Textbox)
Case "combobox"
...
End Select

You can loop through a Hashtable using For Each Loop.

> I'm looking for a way to refernce a control by a string that represents the
> name of the control. I dynamically create some textboxes, labels, and
[quoted text clipped - 10 lines]
> thanks
> nate

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nate axtell - 27 Oct 2004 20:45 GMT

I went with the Hashtable method, thanks.
nate

> Create a Hashtable
>
[quoted text clipped - 41 lines]
>> thanks
>> nate

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reference a control by string.

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