ECMaScript 之获取数据

var collListItem = null;
function IsExsiteData()
    { 
       collListItem = null;
       var peoplePickerData1 = getPeoplePickerDataDocument();
       var userId1 = getXmlValue(peoplePickerData1, "/ArrayOfDictionaryEntry/DictionaryEntry[./Key = 'SPUserID']/Value");
       var ActivityID1=$("#td_IDInfo").text();
        var clientContext = new SP.ClientContext.get_current();
        var web = clientContext.get_web();
        var roleList = web.get_lists().getByTitle($("#div_LibName").text());
        var camlQuery = new SP.CamlQuery();
        var strCaml = "<View><ViewFields><FieldRef Name='ID'/></ViewFields><Query><Where><And><Eq><FieldRef Name='_x56e2__x961f__x6d3b52a8_ID' /><Value Type='Number'>"+ActivityID1 +"</Value></Eq><Eq><FieldRef Name='_x62a5_40d__x4eba_' LookupId='true' /><Value Type='User'>"+ userId1 +"</Value></Eq></And></Where></Query></View>";                  
        camlQuery.set_viewXml(strCaml);
        collListItem = roleList.getItems(camlQuery);
        clientContext.load(collListItem);
        clientContext.executeQueryAsync(
        function (sender, args) { QuerySucceeded(sender, args); },
        function (sender, args) { QueryFailed(sender, args); }
        );
    }
 	function QuerySucceeded(sender, args) {
        var listItemEnumerator = collListItem.getEnumerator();
        var idStr="";
        while(listItemEnumerator.moveNext())
        {
            var myListItem = listItemEnumerator.get_current();           
            idStr=idStr+myListItem.get_item('ID')+",";
        }
        if(idStr=="")
        {
           EntryVoteData();
        }
        else
        {
           alert("该用户！");
        }
      }
    function QueryFailed(sender, args) {
        alert("提失败！");
    }