Recursive Function Finds a Control on a Form

 運用遞迴函式找到一個伺服器控制項，我們時常搞不清楚我們的控制項到底在控制項樹的什麼地方！看到老外寫了一篇文章，呵呵！不過用遞迴演算法，效率差了些，一般清楚控制項樹結構的情況下，還是直接用FindControl函數好一點！

This recursive function finds a control on a form by its name.

//written in C#

/// &ltsummary>
///Recursive function to find control on the form by its name
/// </summary>
private Control _co;
private Control _find_control(Control _c, string _name)
{
   if (_co != null) return _co;
   IEnumerator _ir =  _c.Controls.GetEnumerator(); 
   _ir.Reset();
   while (_ir.MoveNext())
   {
      if (_co != null) break;
      if (((Control)_ir.Current).Name == _name)
      {
         _co = ((Control)_ir.Current);   
         break;
      }
      _find_control(((Control)_ir.Current),_name);
   }
   return _co;
}

//usage examples

Form1 _fm = (Form1)this.FindForm();
_co = null;
DataGrid _dg = (DataGrid)_find_control((Control)_fm,"GRID1");
_co = null;
Label _lbl = (Label)_find_control((Control)_fm,"Label1");

By Yuriy Bas　in www.devx.com