使用客户端对象模型SharePoint 2010编程获取listtitemversion

Question

我有一个场景，我必须移动我所有的数据在SharePoint 2010列表(name= "VersionTestList")到SQL服务器数据库。由于在列表中启用了版本控制，所以我也想移动以前的版本详细信息。无论如何，我能够移动最新的项目，但不幸的是，我无法获得以前的版本数据。我已经尝试过使用客户端对象模型并能够获得版本，但无法获得相应版本的ListItem。请找到下面的代码，我一直尝试到现在，并给我解决这个问题的手。

此外，我正在采用ListItem的版本如下:

string path = web.ServerRelativeUrl + "/Lists/VersionTestTable/1_.000";
File file = web.GetFileByServerRelativeUrl(path);
clientContext.Load(file, item=>item.ListItemAllFields);
FileVersionCollection versions = file.Versions;
clientContext.Load(versions);
oldVersions = clientContext.LoadQuery(versions.Where(v => v != null));
clientContext.ExecuteQuery();

我的整个代码是这样的:

class Program
{
    static void Main(string[] args)
    {
        GetVersionsUsingCOM();
    }
    public static void GetVersionsUsingCOM()
    {
        File file;
        FileVersionCollection versions;
        IEnumerable<Microsoft.SharePoint.Client.FileVersion> oldVersions;
        ClientContext clientContext = new ClientContex("http://server:1200/test/Poc");
        Web web = clientContext.Web;
        clientContext.Load(web);
        clientContext.ExecuteQuery();
        string path = web.ServerRelativeUrl + "/Lists/VersionTestTable/1_.000";
        file = web.GetFileByServerRelativeUrl(path);
        clientContext.Load(file, item=>item.ListItemAllFields);
        //clientContext.ExecuteQuery();
        versions = file.Versions;
        clientContext.Load(versions);
        oldVersions = clientContext.LoadQuery(versions.Where(v => v != null));
        clientContext.ExecuteQuery();
        if (oldVersions != null)
        {
            foreach (Microsoft.SharePoint.Client.FileVersion _version in oldVersions)
            {
                int count=0;
                Console.WriteLine(_version.CheckInComment);
                Console.WriteLine("Version : {0}", _version.VersionLabel);
          //// Working fine till here but unable to get the version details from version.Url
                string versionItemUrl = web.ServerRelativeUrl +"/" + _version.Url;
                File oldFile = web.GetFileByServerRelativeUrl(versionItemUrl);
                clientContext.Load(oldFile, f=>f.ListItemAllFields);
                clientContext.ExecuteQuery();
                Console.WriteLine(oldFile.ListItemAllFields["Name"]);
                count++;
            }
            oldVersions = null;
        }
        Console.ReadLine();
    }
}

Answer 1

你必须像这样初始化web.ServerRelativeUrl

oldVersions = clientContext.LoadQuery(versions.Where(v => v != null));
clientContext.Load(web, w => w.ServerRelativeUrl);
clientContext.ExecuteQuery();

Answer 2

你可以得到像这样的旧版本文件

string versionItemUrl = file.ServerRelativeUrl.Replace(Path.GetFileName(file.ServerRelativeUrl),"") + _version.Url;
File oldFile = web.GetFileByServerRelativeUrl(versionItemUrl);
clientContext.Load(oldFile, f=>f.ListItemAllFields);
clientContext.ExecuteQuery();

Answer 3

您应该能够使用SPFileVersion.Properties获得列表项数据，这将为您提供文件的元数据的哈希表，请参阅MSDN - SPFileVersion。属性财产。

Inside your foreach try

Hashtable oHash = oFileVersion.Properties;
ICollection collKeys = oHash.Keys;
foreach (object oKey in collKeys)
{
    Console.WriteLine(oKey.ToString() + " :: " + oHash[oKey.ToString()].ToString());
}