protected void btnPassWord_Click(object sender, EventArgs e)

    {

         //加密

        Configuration config = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);

        ConfigurationSection section = config.GetSection("appSetting");

        if (section != null && !section.SectionInformation.IsProtected)

        {

            section.SectionInformation.ProtectSection("RsaProtectedConfigurationProvider");

            config.Save();

            Response.Write("<script>alert('加密成功');</script>");

        }