Sharepoint学习笔记—ECMAScript对象模型系列-- 5、使用ECMA操作列表对象(list)

   前面我们使用ECMCA script对象模型操作了Sharepoint 网站对象，这里我们来看看如何操作网站上的列表(List)，操作列表List的方式与访问网站对象类似，首先使用 ClientContext构造函数并传递 URL 或 URI 以返回特定的请求上下文。然后，可以使用 Web  类的 lists  属性获取网站中列表的集合。

一、创建一个List 

<script type="text/javascript">

    var currentcontext = null;

    var currentweb = null;

    function CreateList() {

        currentcontext = new SP.ClientContext.get_current();

        currentweb = currentcontext.get_web();



        var ListInfo = new SP.ListCreationInformation();

        var ItemInfo = new SP.ListItemCreationInformation();



        ListInfo.set_title('List Created From ECMA Script');

        ListInfo.set_templateType(SP.ListTemplateType.genericList);

        this.createdList = currentweb.get_lists().add(ListInfo);

        currentcontext.load(createdList, 'Title', 'Id');



        currentcontext.executeQueryAsync(Function.createDelegate(this, this.ExecuteOnSuccessCreateList),

                                         Function.createDelegate(this, this.ExecuteOnFailureCreateList));

    }



    function ExecuteOnSuccessCreateList(sender, args) {

        alert('list title:' + createdList.get_title() + '\n ID' + createdList.get_id());

    }



    function ExecuteOnFailureCreateList(sender, args) {

        alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());

    } 



</script>

 

 

二、检索网站中所有列表的全部属性
  若要返回网站的所有列表，可通过 load(clientObject) 方法加载列表集合，然后调用 executeQueryAsync(succeededCallback, failedCallback) 。以下示例显示网站的 URL 以及创建列表的日期和时间。

<script type="text/javascript">



    var siteUrl = '/';

    function retrieveAllListProperties() {

        var clientContext = new SP.ClientContext(siteUrl);

        var oWebsite = clientContext.get_web();

        this.collList = oWebsite.get_lists();



        clientContext.load(collList);



        clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceededretrieveAllListProperties),

                                        Function.createDelegate(this, this.onQueryFailedretrieveAllListProperties));

    }



    function onQuerySucceededretrieveAllListProperties() {



        var listInfo = '';



        var listEnumerator = collList.getEnumerator();



        while (listEnumerator.moveNext()) {

            var oList = listEnumerator.get_current();

            listInfo += 'Title: ' + oList.get_title() + ' Created: ' + oList.get_created().toString() + '\n';

        }

        alert(listInfo);

    }



    function onQueryFailedretrieveAllListProperties(sender, args) {

        alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());

    }



</script>

 

 

三、检索列表的指定属性

  上面的示例返回网站中列表的所有属性。若要减少客户端和服务器之间不必要的数据传输，可以使用 LINQ 查询表达式指定要返回的属性。在 JavaScript 中，可以指定 Include 作为传递给 load(clientObject) 方法的查询字符串的一部分，以便指定要返回的属性。下面的示例使用该方法只返回集合中每个列表的标题和 ID ，由于在Include中只指定了Title与ID,如果尝试显示诸如ParentWebUrl 等内容，您将会收到 PropertyOrFieldNotInitializedException异常。

<script type="text/javascript">

    var siteUrlretrieveSpecificListProperties = '/';

    function retrieveSpecificListProperties() {



        var clientContext = new SP.ClientContext(siteUrlretrieveSpecificListProperties);

        var oWebsite = clientContext.get_web();

        this.collList = oWebsite.get_lists();



        clientContext.load(collList, 'Include(Title, Id)');



        clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceededretrieveSpecificListProperties),

                                        Function.createDelegate(this, this.onQueryFailedretrieveSpecificListProperties));

    }

    function onQuerySucceededretrieveSpecificListProperties() {



        var listInfo = '';



        var listEnumerator = collList.getEnumerator();



        while (listEnumerator.moveNext()) {

            var oList = listEnumerator.get_current();

            listInfo += 'Title: ' + oList.get_title() + ' ID: ' + oList.get_id().toString() + '\n';

        }

        alert(listInfo);

    }



    function onQueryFailedretrieveSpecificListProperties(sender, args) {

        alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());

    }



</script>

 

 

 

四、在集合中存储检索到的列表
  我们还可以使用 loadQuery(clientObjectCollection, exp)方法而不是像上面使用的load(clientObject)方法。loadQuery方法用来在另一集合中存储返回值，而上面使用的Load方法则是将返回值存储在 lists属性中。但是LoadQuery方法不支持托管对象模型使用的 LINQ 方法和操作。

<script type="text/javascript">

    var siteUrlToCollection = '/';

    function retrieveSpecificListPropertiesToCollection() {



        var clientContext = new SP.ClientContext(siteUrlToCollection);

        var oWebsite = clientContext.get_web();

        var collList = oWebsite.get_lists();



        this.listInfoCollection = clientContext.loadQuery(collList, 'Include(Title, Id)');



        clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceededretrieveSpecificListPropertiesToCollection), Function.createDelegate(this, this.onQueryFailedretrieveSpecificListPropertiesToCollection));

    }



    function onQuerySucceededretrieveSpecificListPropertiesToCollection() {



        var listInfo = '';



        for (var i = 0; i < this.listInfoCollection.length; i++) {

            var oList = this.listInfoCollection[i];

            listInfo += 'Title: ' + oList.get_title() + ' ID: ' + oList.get_id().toString();

        }

        alert(listInfo.toString());

    }



    function onQueryFailedretrieveSpecificListPropertiesToCollection(sender, args) {

        alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());

    }



</script>

 

 

 

 

五、检索网站中的列表字段
  我们可以将 Include 语句嵌套在 JavaScript 查询中，以返回列表及其字段的元数据。该示例返回网站中所有列表的所有字段，并显示其内部名称包含字符串“name”的所有字段的标题和内部名称。 

<script type="text/javascript">



    var siteUrlListsAllFields = '/';



    function retrieveAllListsAllFields() {

        var clientContext = new SP.ClientContext(siteUrlListsAllFields);

        var oWebsite = clientContext.get_web();

        var rootWebsite = clientContext.get_site().get_rootWeb();

        var collList = oWebsite.get_lists();



        this.listInfoArray = clientContext.loadQuery(collList,

        'Include(Title,Fields.Include(Title,InternalName))');



        clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceededretrieveAllListsAllFields),

        Function.createDelegate(this, this._onQueryFailedretrieveAllListsAllFields));

    }



    function onQuerySucceededretrieveAllListsAllFields() {



        var listInfo = '';

        alert("OK");

        for (var i = 0; i < this.listInfoArray.length; i++) {



            var oList = this.listInfoArray[i];

            var collField = oList.get_fields();



            var fieldEnumerator = collField.getEnumerator();



            while (fieldEnumerator.moveNext()) {

                var oField = fieldEnumerator.get_current();

                var regEx = new RegExp('name', 'ig');



                if (regEx.test(oField.get_internalName())) {

                    listInfo += '\nList: ' + oList.get_title() +

                    '\n\tField Title: ' + oField.get_title() +

                    '\n\tField Name: ' + oField.get_internalName();

                }

            }

        }

        alert(listInfo);

    }



    function _onQueryFailedretrieveAllListsAllFields(sender, args) {

        alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());

    }



</script>

 

 

 

五、检索列表的ContentType

 我们可以使用如下代码来获取列表List的ContentTypes

<script language="ecmascript" type="text/ecmascript">
        var contentTypeCollection;
        var listCollection;
        var list;
        function getListContentTypes() {
            var clientContext = new SP.ClientContext.get_current();
            if (clientContext != undefined && clientContext != null) {
                var web = clientContext.get_web();
                this.listCollection = web.get_lists();
                this.list = listCollection.getByTitle("MyTestList");
                this.contentTypeCollection = list.get_contentTypes();
                clientContext.load(this.contentTypeCollection);
                clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceededListContentTypes), Function.createDelegate(this, this.onQueryFailedListContentTypes));
            }
        } 
        function onQuerySucceededListContentTypes() {
            var contentType = 'List Content Types:\n '
            var contentTypeEnumerator = this.contentTypeCollection.getEnumerator();
 
            while (contentTypeEnumerator.moveNext()) {
                var content = contentTypeEnumerator.get_current();
                contentType += content.get_name() + '\n';
            }
            alert(contentType);
        }
 
        function onQueryFailedListContentTypes(sender, args) {
            alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());

</script>