Iterate over Collection Controls

[4ks]

I am trying to iterate over all controls in a panel components collection to retrieve value from nested TextBox components. the code below produces an error.
TextBox' is a 'type' but is used like a 'variable'. What is the best way to do this?

public void ListControlCollection()
{
foreach (Control ctrl in assesmentPanel.Controls)
{
if (ctrl.GetType().Equals(TextBox))
{
question_txt.Text = ctrl.Text;
}
}
}

 

[JurkMonkey]

if (ctrl.GetType().Equals(typeof(TextBox)))

 

[Hokkie]

Or,

if (ctrl is TextBox)
    question_txt.Text = ((TextBox)ctrl).Text;

 

[JurkMonkey]

hmmm forgot about the is keyword.

Good point Hokkie!

 

[chiph]

if (ctrl.GetType().Equals(typeof(TextBox)))

You'll want to cache the [tt]typeof(TextBox)[/tt] in a local variable outside the loop. It turns out to be a very expensive operation -- we sped up our app tremendously by removing unneeded typeof() and GetType() calls.

Chip H.


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