在使用CSOM进行初始部署之后，将SharePoint列表webpart添加到特定页面

Question

在部署我的SharePoint站点期间，我创建了一些我想以编程方式添加到主页的列表，但找不到任何可用的东西。

现在，我得到了以下错误：

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.' 

这里说的部署过程中创建的清单代码：

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(); 

这里就是我想要的代码将其中一个列表添加到主页：

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); 

这是方法AddWebPart，但是我还没有能够测试这是否会工作，因为我无法达到的代码：

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(); 
    } 

谢谢任何​​帮助！

Answer 1

您正在加载所有列表信息（包含基本文件），因此尝试访问XML数据时出现NonInitializedProperty异常。如果你想获得你的模式，你需要明确加载它。

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); 

希望有帮助。