SharePoint JSOM：获取 SPFolder 自定义字段值答案

【问题标题】：SharePoint JSOM: get SPFolder custom field valueSharePoint JSOM：获取 SPFolder 自定义字段值
【发布时间】：2014-10-23 08:09:43
【问题描述】：

我们有

SharePoint 2013 文档库
添加到库中的自定义内容类型，基于标准“文件夹”内容类型；添加到内容类型的新“DisplayName”文本字段
在文档库中创建了一些该自定义内容类型的文件夹

我尝试制作一个 JavaScript 控件来可视化库中的文件夹结构。但我无法获得自定义的“DisplayName”字段值

this.clientContext = SP.ClientContext.get_current();

var web = this.clientContext.get_web();
this.clientContext.load(web);

this.clientContext.executeQueryAsync(function(sender, args) {

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

        var contextParams = {};

        contextParams.folderUrl = web.get_serverRelativeUrl() + "/" + this.topLevelFoldersUrl[i];

        // folder
        contextParams.topLevelFolder = web.getFolderByServerRelativeUrl(contextParams.folderUrl);
        this.clientContext.load(contextParams.topLevelFolder, 'Include(DisplayName)');

        // folder list item
        contextParams.folderListItem = contextParams.topLevelFolder.get_listItemAllFields();
        this.clientContext.load(contextParams.folderListItem);

        // subfolders
        contextParams.folderCollection = contextParams.topLevelFolder.get_folders();
        this.clientContext.load(contextParams.folderCollection);

        this.clientContext.executeQueryAsync(

            function (sender, args) {

                var folderName = contextParams.topLevelFolder.get_name();

                // EXCEPTION goes here: "property has not been initialized"
                var folderDisplayName = contextParams.folderListItem.get_item("DisplayName");

                // visualization code...

            },
            this.onQueryFailed
        );
    }
}, this.onQueryFailed);

是否有特殊的技术来获取文件夹自定义字段？我搜索了所有代码示例以获取列表项及其自定义字段，但这些示例在我的情况下不起作用。

【问题讨论】：

标签： javascript sharepoint sharepoint-2013 sharepoint-clientobject

【解决方案1】：

“DisplayName”似乎是 SharePoint 2013 JSOM 中的保留标识符。将字段名称更改为“ShownName”后，我的代码有效：

this.clientContext = SP.ClientContext.get_current();

var web = this.clientContext.get_web();
this.clientContext.load(web);

this.clientContext.executeQueryAsync(function (sender, args) {

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

        var contextParams = {};

        contextParams.folderUrl = web.get_serverRelativeUrl() + "/" + this.topLevelFoldersUrl[i];

        contextParams.topLevelFolder = web.getFolderByServerRelativeUrl(contextParams.folderUrl);
        this.clientContext.load(contextParams.topLevelFolder);

        contextParams.folderListItem = contextParams.topLevelFolder.get_listItemAllFields();
        this.clientContext.load(contextParams.folderListItem, 'ShownName');

        contextParams.folderCollection = contextParams.topLevelFolder.get_folders();
        this.clientContext.load(contextParams.folderCollection);                        

        this.clientContext.executeQueryAsync(

            function(sender, args) {

                var folderName = folder.get_name(); 
                var folderDisplayName = folderItem.get_item("ShownName");

                // visualization code...
            },
            this.onQueryFailed
        );
    }
}, this.onQueryFailed);

【讨论】：