遍历页面控件并赋值

//遍历页面上所有TextBox控件，并清空
    private void InitialControl(ControlCollection objControlCollection)
    {
        foreach (System.Web.UI.Control objControl in objControlCollection)
        {
            if (objControl.HasControls())
            {
                InitialControl(objControl.Controls);
            }
            else
            {
                if (objControl is System.Web.UI.WebControls.TextBox)
                {
                    ((System.Web.UI.WebControls.TextBox)objControl).Text = String.Empty;
                }
            }
        }
    }