Calling spclientcontext.executeQueryAsync works on the first call, but fails on the second call

Question

I have a webpart that I'm using to display a tree of folders and files from a SharePoint list. When a folder is clicked, some client side code is used to expand the contents of the folder (the code queries the SharePoint list for any child items of the folder).
The code works the first time the folder is clicked. However, if I then click on a sub folder, the code fails. If I click on the sub folder a second time, the code succeeds. This pattern continues - every second time I call my function, it fails.
E.g.
First Click (clicked on Guides), which succeeds, and expands the Guides folder. Second Click (clicked on "In Progress") (fails)
Third Click (clicked on In Progress) (succeeds)
Any ideas why this might happen?
My code looks like this:
var _dweb;
var _dlist;
var _dwebId;
var _dlistId;
var _dfolderUrl;
var _dchildContainerId;
var _dactionContainerId;
var _dlistItems;
var _rtdocsJsInQuery = 0;
function expandorcolapsefolder(webId, listId, folderUrl, parentElementId, childContainerId, actionContainerId) {
var parentElement = $(("#" + parentElementId));
var childElement = $(("#" + childContainerId));
if (parentElement.attr("expanded") == "0") {
parentElement.attr("expanded", "1");
childElement.css("display", "block");
} else {
parentElement.attr("expanded", "0");
childElement.css("display", "none");
return;
if (childElement.attr("dataretrieved") == "0") {
GetData(webId, listId, folderUrl, childContainerId, actionContainerId);
function GetData(webId, listId, folderUrl, resultsElementId, actionContainerId) {
if(_rtdocsJsInQuery==1)
alert('Please wait for the previous action to finish, before trying again.');
_rtdocsJsInQuery = 1;
_dchildContainerId = resultsElementId;
_dactionContainerId = actionContainerId;
_dwebId = webId;
_dlistId = listId;
ShowActionContainer(actionContainerId);
try {
var context = new SP.ClientContext.get_current();
_dweb = context.get_web();
_dlist = _dweb.get_lists().getById(listId);
var query = new SP.CamlQuery();
query.set_viewXml('<View><OrderBy><FieldRef Name="Title"/><FieldRef Name="FileLeafRef"/></OrderBy></View>');
query.set_folderServerRelativeUrl(folderUrl);
_dlistItems = _dlist.getItems(query);
context.load(_dweb);
context.load(_dlist);
context.load(_dlistItems, 'Include(ID,Title,DocIcon,_dlc_DocIdUrl,DisplayName,FileSystemObjectType,FileLeafRef,ServerUrl)');
context.executeQueryAsync(QuerySuccessful,QueryFailed);
} catch (e) {
alert("Failed to execute query... " + e);
HideActionContainer(actionContainerId);
function QuerySuccessful(sender, args) {
try {
// Code omitted.
} catch (error) {
alert("Failed to process query results... " + error);
_rtdocsJsInQuery = 0;
window.setTimeout(HideActionContainer(_dactionContainerId), 500);
function QueryFailed(sender, args) {
alert('Failed to get list items. \nError: ' + args.get_message() + '\nStackTrace: ' + args.get_stackTrace());
_rtdocsJsInQuery = 0;
HideActionContainer(_dactionContainerId);
Regards, Matthew
MCPD | MCITP
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Answer 1

I fixed this problem by initialising the clientcontext object with a URL (rather than using the get_current property). This suits my needs, as the web that the page the webpart is on, won't always be in the same web as the list.
I'm still unsure why  "var context = SP.ClientContext.get_current();" fails every second time?!
Here's the snippet of code I changed, for others reference (namely "var ctx = new SP.ClientContext('/weburl');"):
function GetData(webId, listId, folderUrl, resultsElementId, actionContainerId) {
if(_rtdocsJsInQuery==1)
alert('Please wait for the previous action to finish, before trying again.');
return;
_rtdocsJsInQuery = 1;
_dchildContainerId = resultsElementId;
_dactionContainerId = actionContainerId;
_dwebId = webId;
_dlistId = listId;
ShowActionContainer(actionContainerId);
try {
var ctx = new SP.ClientContext('/eog');
_dweb = ctx.get_web();
_dlist = _dweb.get_lists().getById(listId);
var query = new SP.CamlQuery();
query.set_viewXml('<View><OrderBy><FieldRef Name="Title"/><FieldRef Name="FileLeafRef"/></OrderBy></View>');
query.set_folderServerRelativeUrl(folderUrl);
_dlistItems = _dlist.getItems(query);
ctx.load(_dweb);
ctx.load(_dlist);
ctx.load(_dlistItems, 'Include(ID,Title,DocIcon,_dlc_DocIdUrl,DisplayName,FileSystemObjectType,FileLeafRef,ServerUrl)');
ctx.executeQueryAsync(QuerySuccessful,QueryFailed);
return true;
} catch (e) {
alert("Failed to execute query... " + e);
HideActionContainer(actionContainerId);
return false;
Regards, Matthew
MCPD | MCITP
My Blog
View
Matthew Yarlett's profile
See my webpart on the TechNet Gallery that allows administrative users to upload, crop and format user profile photos. Check it out here:
Upload and Crop User Profile Photos