c# - Readonly properties -

hi here try make method can loop on form , convert text boxenter image description here read only=true read = false not working

public static void unread only(form frm)     {         foreach (control item in frm.controls)         {             if (item textbox)             {                // item.readonly = false;             }         }                } 

primarily problem not casting control textbox have access property want set.

foreach (control item in frm.controls) {     if (item textbox) {         var textbox = item textbox;         textbox.readonly = false;     } } 

that said, controls can contain child control, need crawl entire form looking embedded text boxes.

this check form , controls text boxes , set them read only

public static void setreadonly(control frm) {     var controls = new queue<control>();     controls.enqueue(frm);     while (controls.count > 0) {         var control = controls.dequeue();         if (control textbox) {             var txtbox = control textbox;             txtbox.readonly = true;         }         if (control.haschildren) {             foreach (var child in control.controls.oftype<control>()) {                 controls.enqueue(child);             }         }     } } 

the code pretty self explanatory should walk through flow understand doing.