public partial class Form1 : Form
    {
        BackgroundWorker worker = new BackgroundWorker();
        xxContext context_ = null;
        public Form1()
        {
            InitializeComponent();
            worker.DoWork += Worker_DoWork;
            worker.RunWorkerCompleted += Worker_RunWorkerCompleted;
            worker.RunWorkerAsync();
        }

        private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
           
        }

        private void Worker_DoWork(object sender, DoWorkEventArgs e)
        {
            context_ = new xxContext();
            var objectContext = ((IObjectContextAdapter)dbcontext_).ObjectContext;
            var mappingCollection = (StorageMappingItemCollection)objectContext.MetadataWorkspace.GetItemCollection(DataSpace.CSSpace);
            mappingCollection.GenerateViews(new List<EdmSchemaError>());
        
        }

    }

public class InitModule : IHttpModule
    {
        public static bool flag = false;

        #region IHttpModule Members

        public void Dispose()
        {
        }

        public void Init(HttpApplication context)
        {
            context.BeginRequest += Context_BeginRequest;
        }

        private void Context_BeginRequest(object sender, EventArgs e)
        {
            if (!flag)
            {
                flag = true;
                Task.Factory.StartNew(() => {
                    var context = new xxContext();
                    var objectContext = ((IObjectContextAdapter)context).ObjectContext;
                    var mappingCollection = (StorageMappingItemCollection)objectContext.MetadataWorkspace.GetItemCollection(DataSpace.CSSpace);
                    mappingCollection.GenerateViews(new List<EdmSchemaError>());
                });
            }
        }

        #endregion

    }

web.config:
<system.webServer>
    <modules>
      <add name="init" type="InitModule"/>
    </modules>
</system.webServer>