Sharepoint 2013 : Integrating Apps for Office with SharePoint (part 2) - Apps for Office Integrated with an App for SharePoint

<form id="form1" runat="server">
 <div>
     <asp:ScriptManager ID="ScriptManager1" runat="server" 
           EnablePartialRendering="true" />
     <asp:UpdatePanel ID="PopulateData" runat="server" UpdateMode="Conditional">
        <ContentTemplate>   
   
        <table border="1" cellpadding="10">
         <tr><th> App for Office in an app for SharePoint</th></tr>
         <tr><td>
        <h2>SharePoint Site Accessed</h2>
        <asp:Label runat="server" ID="WebTitleLabel"/>
        <h2>SharePoint AppWeb, right-click and Open in new tab</h2>
        <asp:HyperLink ID="HyperLink1" runat="server">SPAppURL</asp:HyperLink>
        <h2>Current logged-in User:</h2>
        <asp:Label runat="server" ID="CurrentUserLabel" />
        <h2>Users of the Site</h2>
        <asp:ListView ID="UserList" runat="server">     
            <ItemTemplate ><asp:Label ID="UserItem" runat="server" 
        Text="<%# Container.DataItem.ToString()  %>"></asp:Label><br />
            </ItemTemplate>
        </asp:ListView>
        <h2>Lists available on the Host Web</h2>
        <asp:ListView ID="ListList" runat="server">
            <ItemTemplate ><asp:Label ID="ListItem" runat="server" 
        Text="<%# Container.DataItem.ToString()  %>"></asp:Label><br />
            </ItemTemplate>
        </asp:ListView>
        </td>
              
        </tr>
        </table>
        </ContentTemplate>
    </asp:UpdatePanel>
</div>
</form>

string siteName;
string currentUser;
List<string> listOfUsers = new List<string>();
List<string> listOfLists = new List<string>();

// The following code gets the client context and site information 
// by using TokenHelper.
 
var contextToken = TokenHelper.GetContextTokenFromRequest(Page.Request);
var hostWeb = Page.Request["SPHostUrl"];
var spAppWeb = Page.Request["SPAppWebUrl"];
 
using (var clientContext = 
TokenHelper.GetClientContextWithContextToken(hostWeb, contextToken, 
    Request.Url.Authority))
  {
    //Load the properties for the web object.
    var web = clientContext.Web;
    clientContext.Load(web);
    clientContext.ExecuteQuery();
 
    //Get the site name.
    siteName = web.Title;
 
    //Get the current user.
    clientContext.Load(web.CurrentUser);
    clientContext.ExecuteQuery();
    currentUser = clientContext.Web.CurrentUser.LoginName;
 
    //Load the lists from the Web object.
    ListCollection lists = web.Lists;
    clientContext.Load<ListCollection>(lists);
    clientContext.ExecuteQuery();
 
    //Load the current users from the Web object.
    UserCollection users = web.SiteUsers;
    clientContext.Load<UserCollection>(users);
    clientContext.ExecuteQuery();
 
    foreach (User siteUser in users)
       {
          listOfUsers.Add(siteUser.LoginName);
       }
 
    foreach (List list in lists)
       {
           listOfLists.Add(list.Title);
       }
 
    // Display on page
    HyperLink1.Text = spAppWeb.ToString() 
+ "/Lists/AppCompositeDocLibrary/";
    HyperLink1.NavigateUrl = spAppWeb.ToString() 
+ "/Lists/AppCompositeDocLibrary/";
    WebTitleLabel.Text = siteName;
    CurrentUserLabel.Text = currentUser;
    UserList.DataSource = listOfUsers;
    UserList.DataBind();
    ListList.DataSource = listOfLists;
    ListList.DataBind();
 
  }