Retrieving SP user info using Client Object Model

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Recently I built a visual web part to show current user’s information (Picture, Name, etc). Instead of using SharePoint server object model, this time I choose to use client OM. First I need to get the id of the logged-in user, which can be retrieved from _spPageContextInfo.userId (Ted Pattison has posted an excellent article explaining this variable). Next step is to get the client context.

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var context = new SP.ClientContext.get_current();     var web = context.get_web();       var userInfoList = web.get_siteUserInfoList();       var camlQuery = new SP.CamlQuery();     camlQuery.set_viewXml('' +                                 '' + userId + '

' +

                                '

1');

 

    this.userListItem = userInfoList.getItems(camlQuery);

 

    context.load(this.userListItem);

 

    context.executeQueryAsync(

            Function.createDelegate(this, onSucceeded),

            Function.createDelegate(this, onFailed));

The onSucceeded function is called when the query runs successfully, otherwise the onFailed function will be executed.

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function onSuceeded(sender, eventArgs) {         var item = this.userListItem.itemAt(0);         var name = item.get_item('Name');         var userName = "Name";           if (name) {             userName = name;         }           alert(userName); }

One last thing to remember is to run the code after SP.js is loaded

1	SP.SOD.executeOrDelayUntilScriptLoaded(LoadUserInfo, 'SP.js');