判断文本框输入是否为汉字

public static bool IsChinese(KeyPressEventArgs e,DevExpress.XtraEditors.TextEdit text)
        {
            if ((e.KeyChar >= (char)0x4e00) && (e.KeyChar <= (char)0x9fa5) || (byte)(e.KeyChar) == 8)
            {
                e.Handled = false;
                return true;
            }
            else
            {
                e.Handled = true;
                return false;
            }
        }