使用 CSOM 进行初始部署后，将 SharePoint 列表 Web 部件添加到特定页面

Question

在我的 sharepoint 站点部署期间，我创建了一些列表，我想以编程方式将它们添加到主页，但我找不到任何有用的东西。

现在，我收到以下错误：

The property or field 'SchemaXml' has not been initialized. 
It has not been requested or the request has not been executed.
It may need to be explicitly requested.'

这里是在部署期间创建列表的代码：

ArrayList arrFields = new ArrayList();
        arrFields.Add(fieldBody);
        arrFields.Add(fieldPublishStartDate);
        arrFields.Add(fieldPublishStopDate);
        arrFields.Add(fieldReadMore);

        //create the home page content lists

        List FeaturedStories = CreateList(ctx, currentWeb, "Featured Stories", ListTemplateType.PictureLibrary, arrFields, true);
        CreateList(ctx, currentWeb, "Team Spotlight", ListTemplateType.PictureLibrary, arrFields, true);
        List quickLinks = CreateList(ctx, currentWeb, "Quick Links", ListTemplateType.Links, null, true);
        List resourceLinks = CreateList(ctx, currentWeb, "Resource Links", ListTemplateType.Links, null, true);

        arrFields.Remove(fieldBody);
        List announcementsList = CreateList(ctx, currentWeb, "News and Announcements", ListTemplateType.Announcements, arrFields, true);
        List eventsCalendarList = CreateList(ctx, currentWeb, "Events Calendar", ListTemplateType.Events, arrFields, true);

        ctx.Load(currentWeb, w => w.Lists);
        ctx.ExecuteQuery();

这是我尝试将列表之一添加到主页的代码：

var pageUrl = "/sites/practice3/SitePages/Home.aspx";
var xml = ctx.Web.Lists.GetByTitle("News and Announcements").SchemaXml;
var web = ctx.Web;
var lists = web.Lists;
ctx.Load(lists);
ctx.ExecuteQuery();
AddWebPart(ctx, pageUrl, xml);

这是AddWebPart的方法，但我无法测试这是否可行，因为我无法访问代码：

public static void AddWebPart(ClientContext context, string pageUrl, string xml)
    {
        var page = context.Web.GetFileByServerRelativeUrl(pageUrl);
        var webpartManager = page.GetLimitedWebPartManager(PersonalizationScope.Shared);
        context.Load(webpartManager);
        context.Load(webpartManager.WebParts);
        context.ExecuteQuery();
        WebPartDefinition webpartDef = webpartManager.ImportWebPart(xml);
        WebPartDefinition webpart = webpartManager.AddWebPart(webpartDef.WebPart, "mainContent", 0);
        context.Load(webpartDef);
        context.ExecuteQuery();
        //webpartManager.ImportWebPart(xml);
        //context.ExecuteQuery();
        Console.WriteLine("Hit any key to continue...");
        Console.ReadKey();
        Console.ReadKey();
    }

感谢您的帮助！

Answer 1

您正在加载所有列表信息（带有基本文件），因此在尝试访问 XML 数据时出现NonInitializedProperty 异常。如果你想得到你的 Schema，你需要显式地加载它。

var pageUrl = "/sites/practice3/SitePages/Home.aspx";
// mark object you would like to access
var list = ctx.Web.Lists.GetByTitle("News and Announcements");
// prepare load query with SchemaXml property
ctx.Load(list, l=>l.SchemaXml);
ctx.ExecuteQuery(); // request the data

AddWebPart(ctx, pageUrl, list.SchemaXml);

希望对您有所帮助。