Iterate though all controls on asp.net page

Question

I\'m using ascx and I need to iterate through all of the controls and selects each that have cssClass attribute set to \'required\'.

I have the following code:

Answer 1

CssClass property is a member of the WebControl class.

You have to check if the control is a webcontrol, or, if it's only a control, you can get the attribute "class" in the attributes collection.

for example, you can do :

List wcs = new List();
GetControlList(Page.Controls, wcs)
foreach (WebControl childControl in wcs)
{
     if(childControl.CssClass == "required") {
          // process the control
     }
}

You also have to iterate recursively. Code found here : Using C# to recursively get a collection of controls from a controlcollection :

private void GetControlList(ControlCollection controlCollection, List resultCollection)
where T : Control
{
    foreach (Control control in controlCollection)
    {
        //if (control.GetType() == typeof(T))
        if (control is T) // This is cleaner
            resultCollection.Add((T)control);

        if (control.HasControls())
            GetControlList(control.Controls, resultCollection);
    }
}