how to get all the controls on the windows form page

Question

I have a windows forms; and there are several controls on it.
I want to have them in a foreach loop to call each control's Clear() method, to make it clear and re-initiliazed item.

How can I do it?**

When I wath the formpage on debug-mode of Vs 2008, I see the "this" thus I can see all of them inside it..

.net version: 2.0

If you see it in the debugger, you should be able to use it in code, especially with the help of IntelliSense. — jv42
– jv42, Commented Oct 28, 2011 at 8:28
@ the NumberEntry whic is derived from text box control on our team project — Bilgin Kılıç
– Bilgin Kılıç, Commented Oct 28, 2011 at 8:29
@jv42 I know I can do it that way, but I am curious if I get them all in a loop to call Clear method, which is common for all objects in "this" form. — Bilgin Kılıç
– Bilgin Kılıç, Commented Oct 28, 2011 at 8:30

Veldmuis · Accepted Answer · 2011-10-28 11:47:08Z

You might have controls on controls on controls etc. So it might be a good idea to put Dmitry Erokhin's code in a recursive function:

private void ClearNumberEntries(ControlCollection controls) { foreach (Control ctrl in controls) { if (ctrl is NumberEntry) { ((NumberEntry)ctrl).Clear(); } //if you are sure a NumberEntry can never have child controls that could also be of type NumberEntry you can put this in an else in stead ClearNumberEntries(ctrl.Controls); } }

Dmitrii Erokhin · Accepted Answer · 2011-10-28 08:29:24Z

You could iterate through controls like this:

foreach (Control ctrl in this.Controls) { if (ctrl is NumberEntry) { ((NumberEntry)ctrl).Clear(); } }

Nighil · Accepted Answer · 2011-10-28 08:43:09Z

for initializing controls again no need to clear each controls, just clear controls in form and call InitializeComponent()

 private void InitializeControls() { this.Controls.Clear(); InitializeComponent(); }

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