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I am currently trying to determine the length of a list that is located on my SharePoint site. I am using a Caml query to retrieve the items in my list, but I can not figure out how to get the length of the result. I am using the Client Object Model and javascript / Ajax / jquery etc...

var context = new SP.ClientContext.get_current();
    var query = new SP.CamlQuery();
    var currentweb = context.get_web();

    query.set_viewXml('<View>' +
                                '<Query>'+
                                    '<Where>'+
                                        '<IsNotNull>' +
                                            '<FieldRef Name="ID" />'+
                                        '</IsNotNull>' +
                                    '</Where>'+
                                '</Query>'+
                                '<ViewFields>'+
                                    '<FieldRef Name="Name"/>'+
                                '</ViewFields>'+
                            '</View>');


    var colList= currentweb.get_lists().getByTitle("MyList");

    this.docList= colList.getItems(query);
    context.load(this.docList);
    context.ExecuteQuery();

When the code runs context.ExecuteQuery() the console prints out this. 

context.ExecuteQuery is not a function
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2 Answers

up vote 2 down vote accepted

The javaScript (and SilverLight) client object model doesn't implement clientContext.ExecuteQuery only the ExecuteQueryAsync(successDelegate, failDelegate)

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Sure it does. At least in SilverLight. I've used it before, and just checked to make sure I wasn't crazy. It's there. It works. – rjcup3 Apr 4 '12 at 20:40
Obviously that is the case in javaScript though, seeing the above error that's thrown. – rjcup3 Apr 4 '12 at 20:42
@rjcup3 Well the SilverLight has it, but only if running outside UI thread, so it's generally discouraged to use it. JavaScript doesn't even have it, which is probably a better approach – Per Jakobsen Apr 4 '12 at 21:10
Why would you want to perform non-UI actions on the UI thread? I only use the UI thread for the UI... I do generally use the asynchronous model, but I have used queries synchronously if they need to be executed in direct succession (ie: data from query A is used in query B, which returns data used in query C). It's just easier to keep them all in one function. – rjcup3 Apr 5 '12 at 0:45
up vote 0 down vote

Are you trying to call get_count() after the query is finished executing? Otherwise the object will be null. It isn't actually retrieved until the ExecuteQuery() or ExecuteQueryAsync(succeed_method, fail_method) call is completed.

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i tried adding context.ExecuteQuery() and i got a stack unwind on that execution, but yes its all called after. In firebug i have my object set as a value. – Dr.Denis McCracleJizz Apr 4 '12 at 18:46
Where do you instantiate currentweb? – rjcup3 Apr 4 '12 at 18:53
yes i did, outside the function but i did. I updated the code to put it inside the function but the result is the same, stack unwind on ExecuteQuery – Dr.Denis McCracleJizz Apr 4 '12 at 18:59

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