连接SDE是正常，但map上就是不显示那图层

连接SDE是正常，但地图上就是不显示那图层?

是9.3版的

//License
        IAoInitialize pAoInit = new AoInitializeClass();
        pAoInit.Initialize(esriLicenseProductCode.esriLicenseProductCodeArcEditor);


        //Workspace
        IWorkspaceFactory pWorkspaceFactory;
        pWorkspaceFactory = new SdeWorkspaceFactoryClass();

        //PropertySet
        IPropertySet pPropertySet;
        pPropertySet = new PropertySetClass();


        //pPropertySet.SetProperty("Service", "mapdataserver");


        //设置数据库服务器名 
        pPropertySet.SetProperty("SERVER", "mapdataserver");  //\\sqlexpress


        //设置SDE的端口，这是安装时指定的，默认安装时port:
        pPropertySet.SetProperty("INSTANCE", "5151");


        //SDE的用户名 
        pPropertySet.SetProperty("USER", "sa");


        //密码
        pPropertySet.SetProperty("PASSWORD", "123456");


        //设置数据库的名字  sde_sz1 szSDE 
        pPropertySet.SetProperty("DATABASE", "GZmap");


        //SDE的版本,在这为默认版本
        pPropertySet.SetProperty("VERSION", "dbo.DEFAULT");

        //IFeatureWorkspace对象
        IFeatureWorkspace pSdeWorkspace;
        IFeatureDataset pFeatureDataset;
        IFeatureClass pFeatureClass;

        //图层
        ESRI.ArcGIS.Carto.IFeatureLayer layer;

        //连接
        pSdeWorkspace = (IFeatureWorkspace)pWorkspaceFactory.Open(pPropertySet, 0);


        //取数据
        //pFeatureDataset = pSdeWorkspace.OpenFeatureDataset("szmap.DBO.公司企业");
        pFeatureClass = pSdeWorkspace.OpenFeatureClass("szmap.DBO.铁路");   //行政区域 铁路


        //定义图层
        layer = new FeatureLayerClass();

        //设定layer的FeatureClass属性
        layer.FeatureClass = pFeatureClass;
        layer.Name = pFeatureClass.AliasName;

        ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem t = new ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem();
        t.Data = pFeatureClass;

        //MapResourceManager1.ResourceItems.Clear();

        int n = MapResourceManager1.ResourceItems.Count;
        MapResourceManager1.ResourceItems.Insert(n, t);

        MapResourceManager1.ResourceItems.Add(t);
        MapResourceManager1.CreateResource(t);
        
        

        Map1.InitializeFunctionalities();

        if (Map1.ImageBlendingMode == ImageBlendingMode.WebTier)
        {
            Map1.Refresh();
        }
        else
        {
            Map1.RefreshResource("MapResourceManager1");
        }

        Response.Write(MapResourceManager1.ResourceItems.Count.ToString());
        Map1.Refresh();





前台

    <form id="form1" runat="server">
    <div>
    

        <esri:MapResourceManager ID="MapResourceManager1" runat="server">
        </esri:MapResourceManager>
        
        <esri:Map ID="Map1" runat="server" Height="200px" Width="300px"