.Net遍历页面上所有TextBox空间并给它赋值为string.Empty

 public void FindTextBox(Control c)
    {
        if (c.Controls != null)
        {
            foreach (Control x in c.Controls)
            {
                if (x is System.Web.UI.WebControls.TextBox)
                {
                    ((System.Web.UI.WebControls.TextBox)x).Text = "";
                }
                FindTextBox(x);
            }
        }
    }