如何在ASP.NET下遍曆指定頁面上所有控制項

#region 清空指定頁面上所有的控制項內容,public static void ClearAllContent( ) /// <summary> /// 清空指定頁面上所有的控制項內容,包括TextBox,CheckBox,CheckBoxList,RadioButton,RadioButtonList.但是不清 /// 除如ListBox,DropDownList,因為這樣的控制項值對當前頁面來說還可以用,一般這些控制項裡都是儲存的字典資料. /// Author：Kevin /// 日期：2004-12-02 /// </summary> /// <param name="page"> 指定的頁面</param> public static void ClearAllContent( System.Web.UI.Control page ) {    int nPageControls = page.Controls.Count;    for ( int i = 0;    i < nPageControls;    i++ )     {        foreach ( System.Web.UI.Control control in page.Controls[i].Controls )         {            if ( control.HasControls( ) )             {                ClearAllText( control );            }            else             {                if ( control is TextBox ) ( control as TextBox ).Text = "";                                if ( control is CheckBox ) ( control as CheckBox ).Checked = false;                                if ( control is RadioButtonList ) ( control as RadioButtonList ).SelectedIndex = -1;                                if ( control is RadioButton ) ( control as RadioButton ).Checked = false;                                if ( control is CheckBoxList )                 {                    foreach ( ListItem item in ( control as CheckBoxList ).Items )                     {                        item.Selected = false;                    }                }            }                    }            }    }#endregi