c#操作appsettiongs

try

{

    //指定要修改的配置文件的路径

    Configuration config = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~/");

    config.AppSettings.Settings["MailServer"].Value = txtMailServer.Value.Trim();

    config.AppSettings.Settings["MailAddress"].Value = txtMailAddress.Value.Trim();

    config.AppSettings.Settings["MailUser"].Value = txtMailUser.Value.Trim();

    config.AppSettings.Settings["MailPwd"].Value = txtMailPwd.Value.Trim();

    config.Save();

    //刷新配置节点

    ConfigurationManager.RefreshSection("appSettings");

 

}

catch (Exception)

{

    Literal alerts = new Literal();

    alerts.Text = "<script>alert('更新配置文件中的邮件服务器参数失败，请确保有足够的权限!');</script>";

    Page.Controls.Add(alerts);

}