using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.WindowsAzure.ServiceRuntime;

namespace WebRole1
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            imgBlob.ImageUrl = RoleEnvironment.GetConfigurationSettingValue("imgBlobURL");
            imgCDN.ImageUrl = RoleEnvironment.GetConfigurationSettingValue("imgCDNURL");
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.WindowsAzure;
using Microsoft.WindowsAzure.Diagnostics;
using Microsoft.WindowsAzure.ServiceRuntime;
using System.Diagnostics;

namespace WebRole1
{
    public class WebRole : RoleEntryPoint
    {
        public override bool OnStart()
        {
            // For information on handling configuration changes
            // see the MSDN topic at http://go.microsoft.com/fwlink/?LinkId=166357.

            // 当用配置文件中ConfigurationSettings时必须调用CloudStorageAccount.SetConfigurationSettingPublisher
            // 来说明当配置文件在发布后被更改时将采取何种操作
            CloudStorageAccount.SetConfigurationSettingPublisher((configName, configSetter) =>
            {
                configSetter(RoleEnvironment.GetConfigurationSettingValue(configName));
                RoleEnvironment.Changed += (sender, arg) =>
                {
                    if (arg.Changes.OfType<RoleEnvironmentConfigurationSettingChange>()

                        .Any((change) => (change.ConfigurationSettingName == configName)))
                    {
                        if (!configSetter(RoleEnvironment.GetConfigurationSettingValue(configName)))
                        {
                            RoleEnvironment.RequestRecycle();
                        }
                    }
                };
            });
            RoleEnvironment.Changing += RoleEnvironmentChanging;

            return base.OnStart();
        }

        private void RoleEnvironmentChanging(object sender, RoleEnvironmentChangingEventArgs e)
        {
            // If a configuration setting is changing
            if (e.Changes.Any(change => change is RoleEnvironmentConfigurationSettingChange))
            {
                // Set e.Cancel to true to restart this role instance
                e.Cancel = false;
            }
        }


    }
}