foreach (FileInfo fi in dirInfo.GetFiles())
{
    HyperLink hl = new HyperLink();
    hl.ID = "Hyperlink" + i++;
    hl.Text = fi.Name;
    hl.NavigateUrl = "../downloading.aspx?file=" + fi.Name + "&user=" + userIdpar;
    Page.Controls.Add(hl);
    Page.Controls.Add(new LiteralControl("<br/>")); 
}

我得到的错误是在Page.Controls.Add(hl)上,这里是解释：

The control collection cannot be modified during DataBind,Init,Load,PreRender or Unload phases.

我该怎么做才能解决这个问题？提前致谢.

在.aspx上：

<asp:Panel id="links" runat="server" />

在后面的代码中(我建议使用Init事件处理程序而不是页面加载)：

foreach (FileInfo fi in dirInfo.GetFiles())
{
  HyperLink hl = new HyperLink();
  hl.ID = "Hyperlink" + i++;
  hl.Text = fi.Name;
  hl.NavigateUrl = "../downloading.aspx?file=" + fi.Name + "&user=" + userIdpar;
  links.Controls.Add(hl);
  links.Controls.Add(new LiteralControl("<br/>"));
}

constraintButtonPlayWidth = NSLayoutConstraint(item: buttonPlay,attribute: NSLayoutAttribute.Width,relatedBy: NSLayoutRelation.Equal,toItem: self.view,multiplier: 1,constant: 100)
self.view.addConstraint(constraintButtonPlayWidth)

但按钮拉得太大了;可能是因为toItem：self.view.我尝试修改约束的常量,但这并没有改变任何东西.

如何正确设置此约束,使其实际宽度为100？

constraintButtonPlayWidth = NSLayoutConstraint (item: buttonPlay,toItem: nil,attribute: NSLayoutAttribute.NotAnAttribute,constant: 100)
self.view.addConstraint(constraintButtonPlayWidth)

endpoints.enabled: false

它适用于除/ info之外的所有端点.
如何关闭给定环境的所有端点？

更新：

我正在做的项目也是Eureka的客户.
在状态页面和健康指标(http://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html)部分的Spring Cloud Netflix文档中,它表示“Eureka实例默认为”/ info“和”/ health“.

是否有任何解决方案来禁用这些端点？

我能够使用endpoints.enabled：false禁用/ health端点,但不能使用/ info端点.

所以我的application.yml看起来像这样：

endpoints.enabled: false

endpoints:
    info.enabled: true
    health.enabled: true

management.security.role: ADMIN

像这样的spring安全配置(我需要将ManagementSecurityConfig的顺序更改为具有更高优先级)：

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfiguration {


    @Configuration
    protected static class AuthenticationSecurity extends GlobalAuthenticationConfigurerAdapter {

        @Autowired
        private AuthenticationProvider authenticationProvider;

        public AuthenticationSecurity() {
            super();
        }

        @Override
        public void init(AuthenticationManagerBuilder auth) throws Exception {
             auth.inMemoryAuthentication().withUser("admin").password("secret").roles("ADMIN");
        }
    }

    @Configuration
    @Order(Ordered.HIGHEST_PRECEDENCE + 2)
    public static class ManagementSecurityConfig extends WebSecurityConfigurerAdapter {


        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http.csrf().disable()
                    .requestMatchers()
                    .antMatchers("/info/**")
                    .and()
                    .authorizeRequests()
                    .anyRequest().hasRole("ADMIN")
                    .and()
                    .httpBasic();
        }
    }

    @Configuration
    public static class ApiWebSecurityConfigurationAdapter extends WebSecurityConfigurerAdapter {

        protected void configure(HttpSecurity http) throws Exception {
            // API security configuration
        }

    }
}

private static final String dataSourceUrl = "jdbc:h2:./Database;DB_CLOSE_ON_EXIT=FALSE";
@Bean
public DataSource dataSource() {
    return DataSourceBuilder.create().url(dataSourceUrl).username("user").password("pwd").build();
}

如何以编程方式设置spring.jpa.hibernate.ddl-auto属性？

@Bean
  public LocalContainerEntityManagerfactorybean entityManagerFactory(DataSource dataSource) {
    LocalContainerEntityManagerfactorybean em = new LocalContainerEntityManagerfactorybean();
    em.setDataSource(dataSource);
    em.setPackagesToScan(new String[] { "packages.to.scan" });

    JpavendorAdapter vendorAdapter = new HibernateJpavendorAdapter();
    em.setJpavendorAdapter(vendorAdapter);

    Properties properties = new Properties();
    properties.setProperty("hibernate.dialect","org.hibernate.dialect.H2Dialect");
    properties.setProperty("hibernate.hbm2ddl.auto","update");
    em.setJpaProperties(properties);

    return em;
  }