An unexpected error has occurred at SharePoint 2010

Question

I'm trying to attach a script to a list page in order to hide a column depending on the user's permissions.

This is the code I put on the aspx using SharePoint Designer 2010:

<asp:Content ContentPlaceHolderId="ScriptHideColumn" runat="server">
<SharePoint:ScriptLink runat="server" Localizable="false" 
name="/SiteAssets/_scriptEscondercolumna.js" id="ScriptHideColumn1" />
</asp:Content>

And this is the error I get:

Error An unexpected error has occurred. Troubleshoot issues with Microsoft SharePoint Foundation. Correlation ID: 308118dd-5e8c-419e-9855-cc5be7810518 Date and Time: 11/04/2018 09:01:29 Go back to site

How can I make the script work without getting any errors?

This is the javascript code:

// JavaScript source code

 function checkUserGroup() {
     bool isMember = false;
     SPSecurity.RunWithElevatedPrivileges(delegate  
        {
            using(SPSite site = new 
SPSite(".../test_")) {
                SPWeb web = site.RootWeb;
                string groupName = "Test_ Visitors";
                var spGroup = web.Groups[groupName];
                isMember = web.IsCurrentUserMemberOfGroup(spGroup.ID);
            }
        });

    return isMember;
}

function hideColumn() {
    var isVisitor = checkUserGroup();
    if (isVisitor) {
        document.getElementsByName("columnHide")[0].style.display = none;
    }
}

Answer 1

Better of by not touching SharePoint Designer and messing with the listform.

Instead you could add a content editor webpart on the listform from the UI and link the code from a txt/js file uploaded in the same site in the CEWP.

Using jQuery and SPServices, you can check if the current user is member of the group "Test_Visitors" and then hide the column "columnHide" if the user is a visitor.

This example using a CDN to get the required libraries.

<script language="javascript" type="text/javascript" src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.3.1.min.js"></script>
<script language="javascript" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery.SPServices/2014.02/jquery.SPServices-2014.02.min.js"></script>
<script language="javascript" type="text/javascript">

$(document).ready(function() {

   $().SPServices({
     operation: "GetGroupCollectionFromUser",
     userLoginName: $().SPServices.SPGetCurrentUser(),
     async: false,
     completefunc: function(xData, Status) {
        if($(xData.responseXML).find("Group[Name='Test_ Visitors']").length == 0)
        {
           $("input[id^='columnHide']").closest('tr').hide();
        }
      }
   });
});

</script>

SPServices GitHub

Answer 2

You can replace your code with below code:

<script language="javascript" type="text/javascript" src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.8.1.min.js"></script>

function hideColumn() {
     var clientContext = new SP.ClientContext.get_current();
     var currentUser = clientContext.get_web().get_currentUser();
     clientContext.load(currentUser);

     var userGroups = currentUser.get_groups();
     clientContext.load(userGroups);
     clientContext.executeQueryAsync(function(){
     var groupsEnumerator = userGroups.getEnumerator();
           while (groupsEnumerator.moveNext()) {
                 var group= groupsEnumerator.get_current();               
                 if(group.get_title() == "Test_ Visitors") {
                 // hide your column here
                 // try to hide your column with id like $("#your_column_id").hide(); OR try it with your code
                 document.getElementsByName("columnHide")[0].style.display = none;

                 break;
            }
            //etc...
         }

       }, function(err){
                alert(err);
          });
      }

 SP.SOD.executeOrDelayUntilScriptLoaded(hideColumn,'sp.js');

In above code, I am checking that if the current user is in Test_ Visitors then hide it. In a similar way, you have to check whether the user is the part of the permission group or not and write js code to hide the column using column id as per my commented code.