Friendly message when user tries to take the survey again

Question

Survey is set to respond only once. However, is there way to show friendly message instead of following error?

Server Error in '/' Application.
You are not allowed to respond again to this survey.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Runtime.InteropServices.COMException: You are not allowed to respond again to this survey.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[COMException (0x81020039): You are not allowed to respond again to this survey.]
   Microsoft.SharePoint.Library.SPRequestInternalClass.IsVotingAllowed() +0
   Microsoft.SharePoint.Library.SPRequest.IsVotingAllowed() +116

[SPException: You are not allowed to respond again to this survey.]
   Microsoft.SharePoint.SPGlobal.HandleComException(COMException comEx) +27825266
   Microsoft.SharePoint.Library.SPRequest.IsVotingAllowed() +199
   Microsoft.SharePoint.WebPartPages.ListFormWebPart.OnInit(EventArgs e) +2068
   System.Web.UI.Control.InitRecursive(Control namingContainer) +143
   System.Web.UI.Control.AddedControl(Control control, Int32 index) +271
   System.Web.UI.WebControls.WebParts.WebPartManagerControlCollection.AddWebPartHelper(WebPart webPart) +305
   System.Web.UI.WebControls.WebParts.WebPartManagerControlCollection.AddWebPart(WebPart webPart) +1937774
   System.Web.UI.WebControls.WebParts.WebPartManagerInternals.AddWebPart(WebPart webPart) +63
   Microsoft.SharePoint.WebPartPages.SPWebPartManager.AddWebPartWithRetry(WebPart webPart) +746
   Microsoft.SharePoint.WebPartPages.SPWebPartManager.CreateWebPartsFromRowSetData(Boolean onlyInitializeClosedWebParts) +7123
   Microsoft.SharePoint.WebPartPages.SPWebPartManager.LoadWebParts() +146
   Microsoft.SharePoint.WebPartPages.SPWebPartManager.OnPageInitComplete(Object sender, EventArgs e) +288
   System.EventHandler.Invoke(Object sender, EventArgs e) +0
   System.Web.UI.Page.OnInitComplete(EventArgs e) +11070286
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1674


Version Information: Microsoft .NET Framework Version:2.0.50727.5456; ASP.NET Version:2.0.50727.5456 

Answer 1

The suggested solution is to add client side validation if user has already responded to survey when the "Respond to this event" button clicked. If validation will fail then display user friendly message otherwise display the original response form. It will allow to avoid this exception to occur.

Solution

Override JavaScript function for opening response form NewItem2

//override NewItem2 function
var NewItem2 = (function () {
    var NewItem2Orig = NewItem2;

    return function() {
        var evt = arguments[0];
        var url = arguments[1];

        //Read survey for current user to find out if he have already voted   
        readSurveyVotes(function(votesCount){
            //if voted then display custom message 
            if(votesCount > 0) {
                window.alert('You have already voted to this survey.');
            }
            //if not, call original function for opening response form
            else {
                NewItem2Orig(evt, url);
            } 
        });
    };

})();

Reading survey votes for current user

function readSurveyVotes(cbSurveyResult)
{
        var context = new SP.ClientContext.get_current();
        var web = context.get_web();
        var list = web.get_lists().getByTitle("Survey");
        var viewXml = '<View><Where><Eq><FieldRef Name="Author"/><Value Type="Integer"><UserID Type="Integer"/></Value></Eq></Where></View>';
        var query = new SP.CamlQuery();
        query.set_viewXml(viewXml);
        var items = list.getItems(query);
        context.load(items);
        context.add_requestSucceeded(onLoaded);
        context.add_requestFailed(onFailure);
        context.executeQueryAsync();
        function onLoaded() {
            var voteCount = items.get_count();
            cbSurveyResult(voteCount)
        }
        function onFailure() {
            cbSurveyResult(null);
        }
}

Usage

Save the code to JavaScript file and add reference to this file in overview.aspx page, like shown below:

<asp:content contentplaceholderid="PlaceHolderAdditionalPageHead" runat="server">
    <SharePoint:RssLink runat="server"/>
    <SharePoint:CssRegistration runat="server" name="Themable/survey.css">
    </SharePoint:CssRegistration>
    <script type="text/javascript" src="/_layouts/SE/SurveyOps.js"></script>
</asp:content>

Answer 2

While working with the above answer by Vadim Gremyachev instead of showing the alert message to the user who is already responded, it shows to all the users. By modifying the above code to some extent it is working fine.

//override NewItem2 function
var NewItem2 = (function () {
    var NewItem2Orig = NewItem2;

    return function() {
        var evt = arguments[0];
        var url = arguments[1];

        //Read survey for current user to find out if he have already voted   
        readSurveyVotes(function(isCurrentUserRespond){
            //if voted then display custom message 
            if(isCurrentUserRespond) {
                window.alert('You have already voted to this survey.');
                return ;
            }
            //if not, call original function for opening response form
            else {
                NewItem2Orig(evt, url);
            } 
        });
    };

    function readSurveyVotes(cbSurveyResult)
    {
        var isCurrentUserRespond = undefined;
        var context = new SP.ClientContext.get_current();
        var web = context.get_web();
        var list = web.get_lists().getByTitle("Survey");      
        var viewXml = '<View><Where><Eq><FieldRef Name="Author"/><Value Type="Integer"><UserID Type="Integer"/></Value></Eq></Where></View>';
        var query = new SP.CamlQuery();
        query.set_viewXml(viewXml);
        var items = list.getItems(query);
        context.load(items);
        context.add_requestSucceeded(onLoaded);
        context.add_requestFailed(onFailure);
        context.executeQueryAsync(function(){
            var enumerator = items.getEnumerator();
            while (enumerator.moveNext()) {
                var item = enumerator.get_current().get_fieldValues().Author;
                if(item.get_lookupId() == web.get_currentUser().get_id()){
                    isCurrentUserRespond = true;
                    cbSurveyResult(isCurrentUserRespond);                    
                    break;
                }
            }
        });
        function onLoaded() { 
                  if(!isCurrentUserRespond){
                       cbSurveyResult(null); 
                  }
         }
         function onFailure() {
             cbSurveyResult(null);
         }
     }   
})();