c# - Foreach loop through controls that are textbox doesn't return -

i've used code before in program, i'm having trouble understanding why won't run code after second line.

foreach (control c in controls)     if (c.gettype() == typeof(textbox)) //doesn't run further     {         if ((string)c.tag == "filled")         {             ...         }         ...     } 

i'm either missing minor little detail or else incorrect. ideas?

edit: textboxes inside panel.

when call control.controls, return controls @ outermost level. won't recursively descend container controls hold other controls.

if controls in container, need use container's .controls property instead.

alternatively can generalize writing method recursively return controls parent , it's children, so:

public ienumerable<control> allcontrols(control container) {     foreach (control control in container.controls)     {         yield return control;          foreach (var innercontrol in allcontrols(control))             yield return innercontrol;     } } 

you can use instead of control.controls follows:

private void test() // assuming member of form other class derived control {     var textboxeswithfilledtag =          allcontrols(this).oftype<textbox>()         .where(tb => (string) tb.tag == "filled");      foreach (var textbox in textboxeswithfilledtag)         debug.writeline(textbox.text); } 

as comment says, i'm assuming test() method member of form or class derived control. if isn't, have pass parent control it:

private void test(control container) {     var textboxeswithfilledtag =          allcontrols(container).oftype<textbox>()         .where(tb => (string) tb.tag == "filled");      foreach (var textbox in textboxeswithfilledtag)         debug.writeline(textbox.text); } 

the following method has identical results 1 above, reference (and more readable imho):

private void test(control container) {     foreach (var textbox in allcontrols(container).oftype<textbox>())         if ((string)textbox.tag == "filled")             debug.writeline(textbox.text); } 

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for code, button click handler might this:

void button1_click(object sender, eventargs e) {     foreach (var c in allcontrols(this).oftype<textbox>())     {         if ((string) c.tag == "filled")         {             // here put code textbox 'c'         }     } } 

note need allcontrols() method, of course.