Provider hosted app installed on SharePoint 2013 on premises is returning internal 500 error !

Question

Hello,
I have deployed the basic provider hosted app on sharepoint 2013 on premises.
However when I try to run the app, its throwing an error on following as mentioned in screen:
It seems an authentication issue, would you please tell me how can I resolve it ?
Thank you in advance.
Kind Regards,
Dipti Chhatrapati

Answer 1

Hi,
According to your description, my understanding is that when you run provider hosted app in SharePoint 2013 on premise, the app occurs internal 500 error.
For using Managed .NET Client Object Model in Provider hosted app, it will need
TokenHelper.cs to get the ClientContext object like below:
private void RetrieveWithCSOM(string accessToken)
if (IsPostBack)
sharepointUrl = new Uri(Request.QueryString["SPHostUrl"]);
ClientContext clientContext =
TokenHelper.GetClientContextWithAccessToken(
sharepointUrl.ToString(), accessToken);
//Load the properties for the web object.
Web 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);
More information:
https://msdn.microsoft.com/en-us/library/office/fp142381.aspx
Thanks
Best Regards,
Jerry Guo
TechNet Community Support
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