使用ClientObjectModel访问SharePoint数据

ClientObjectModel（COM）可以理解为SharePoint对外提供的APIs，通过操纵它我们可以轻松的完成对SharePoint数据的CRUD操作。当然我们可以在SharePoint的自定义页面中调用它，也可以在第三方软件中调用它，并且它的使用方法也非常的简单。要调用它我们必须引用如下程序集：Microsoft.SharePoint.dll, Microsoft.SharePoint.Client.dll，Microsoft.SharePoint.Client.Runtime。
对应这套API将SharePoint 分为了三大块：Folder，File，Item。通过COM返回的folder和File对象都不能进行修改，如果要修改记录必须对返回的Item对象进行修改。估计Folder和File在这套API中充当Metadata来使用，而与这些Metadata对应的List，ListItem着代表着每条真实存在的记录。为了验证这个想法，我***了一个迷你的CRUD程序，如下为其展示效果：



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Common Methods

private ClientContext CreateClientContext()
        {
            NetworkCredential credential = new NetworkCredential(USERNAME, PASSWORD, DOMAIN);
            ClientContext context = new ClientContext(ROOTPATH);
            context.Credentials = credential;
            return context;
        }

Create

ClientContext spContext = CreateClientContext();
            Web website = spContext.Web;
            Folder folder = website.GetFolderByServerRelativeUrl(LIBRARYPATH);
            spContext.Load(website);
            spContext.Load(folder);
            spContext.Load(folder.Files);
            spContext.ExecuteQuery();

            FileCreationInformation file = new FileCreationInformation();
            file.Content = FileUpload1.FileBytes;
            file.Url = System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);
            folder.Files.Add(file);
            spContext.ExecuteQuery();

Read

ClientContext spContext = CreateClientContext();
            Web website = spContext.Web;
            Folder DocLib = website.GetFolderByServerRelativeUrl(LIBRARYPATH);
            spContext.Load(website);
            spContext.Load(DocLib);
            spContext.Load(DocLib.Files);
            spContext.ExecuteQuery();
            GridView1.DataSource = DocLib.Files;
            GridView1.DataBind();

Update

ClientContext spContext = CreateClientContext();
            Web website = spContext.Web;
            Microsoft.SharePoint.Client.File file = website.GetFileByServerRelativeUrl(HiddenField1.Value);
            List docLib = spContext.Web.Lists.GetByTitle("测试库");

            spContext.Load(website);
            spContext.Load(docLib);
            spContext.Load(file);
            spContext.Load(file.ListItemAllFields);
            spContext.ExecuteQuery();
            Microsoft.SharePoint.Client.ListItem item = docLib.GetItemById(file.ListItemAllFields.Id);
            spContext.Load(item);
            spContext.Load(item.File);

            item.File.CheckOut();
            item["Title"] = new Random().Next(10000,99999).ToString();
            item.Update();
            item.File.CheckIn(DateTime.Now.ToString(), CheckinType.OverwriteCheckIn);

            spContext.ExecuteQuery();

Delete

ClientContext spContext = CreateClientContext();
            Web website = spContext.Web;
            Microsoft.SharePoint.Client.File file = website.GetFileByServerRelativeUrl(HiddenField1.Value);
            spContext.Load(website);
            spContext.Load(file);
            spContext.Load(file.ListItemAllFields);
            spContext.ExecuteQuery();
            file.DeleteObject();
            spContext.ExecuteQuery();

Source Code