C#Sharepoint.Client-返回给定子文件夹中的所有文件和文件夹

时间:2018-10-18 09:18:40

标签: c# .net sharepoint caml sharepoint-clientobject

我正尝试从给定的子文件夹返回SharePoint库中的所有文件和文件夹。

如果我将CamlQuery上的FolderServerRelativeUrl设置为希望从其开始的文件夹,则可以获取该给定文件夹的所有列表项;但是,当我尝试添加camlQuery.ViewXML以递归方式返回具有任何其他子文件夹的项目时,出现以下异常:

  

Microsoft.SharePoint.Client.ServerException:'尝试的操作被禁止,因为它超出了管理员强制执行的列表视图阈值。'

代码

public static IEnumerable<string> GetSharepointFiles2(string sharePointsite, string libraryName, string username, string password, string subFolders)
{
    Uri filename = new Uri(sharePointsite);
    string server = filename.AbsoluteUri.Replace(filename.AbsolutePath, "");
    List<string> fullfilePaths = new List<string>();

    using (ClientContext cxt = new ClientContext(filename))
    {
        cxt.Credentials = GetCreds(username, password);

        Web web = cxt.Web;
        cxt.Load(web, wb => wb.ServerRelativeUrl);
        cxt.ExecuteQuery();

        List list = web.Lists.GetByTitle(libraryName);
        cxt.Load(list);
        cxt.ExecuteQuery();

        Folder folder = web.GetFolderByServerRelativeUrl(web.ServerRelativeUrl + subFolders);
        cxt.Load(folder);
        cxt.ExecuteQuery();

        CamlQuery camlQuery = new CamlQuery();
        camlQuery.ViewXml = @"<View Scope='RecursiveAll'>
                             <Query>
                             </Query>
                         </View>";

        camlQuery.FolderServerRelativeUrl = folder.ServerRelativeUrl;
        ListItemCollection listItems = list.GetItems(camlQuery);

        cxt.Load(listItems);
        cxt.ExecuteQuery();

        foreach (ListItem listItem in listItems)
        {
            if (listItem.FileSystemObjectType == FileSystemObjectType.File)
            {

                fullfilePaths.Add(String.Format("{0}{1}", server, listItem["FileRef"]));
            }
            else if (listItem.FileSystemObjectType == FileSystemObjectType.Folder)
            {
                Console.WriteLine(String.Format("{0}{1}", server, listItem["FileRef"]));
                fullfilePaths.Add(String.Format("{0}{1}", server, listItem["FileRef"]));
            }
        }
    }
    return fullfilePaths;
}

private static SharePointOnlineCredentials GetCreds(string username, string password)
{
    SecureString securePassword = new SecureString();

    foreach (char c in password.ToCharArray()) securePassword.AppendChar(c);
    return new SharePointOnlineCredentials(username, securePassword);
}

就阈值限制而言,我在只有1个文件和1个文件夹的文件夹中尝试过此操作(反过来,该文件夹仅包含1个文件),所以如果限制默认为5000,我不知道为什么会得到这个的。

1 个答案:

答案 0 :(得分:0)

最后找到了一个可行的解决方案,即使它有点大锤!

尽管我要检索的文件夹远远少于5000个,但问题是整个列表确实超过了此阈值(在这种情况下,这个列表约为11,000个)。

我删除了FolderServerRelativeURL属性,然后使用ListItemCollectionPosition对列表中的所有项目进行分页/批处理。一旦所有项目都在集合中,就可以使用Linq过滤相关子文件夹。 (CAML Query - Going around the 5000 List Item Threshold

如果有人可以更有效地针对这些物品,我很乐意看到它。

代码:

public static IEnumerable<ListItem> GetSharepointFiles2(string sharePointsite, string libraryName, string username, string password, string subFolders)
{
    Uri filename = new Uri(sharePointsite);
    List<ListItem> items = new List<ListItem>();

    using (ClientContext cxt = new ClientContext(filename))
    {
        cxt.Credentials = GetCreds(username, password);

        Web web = cxt.Web;
        cxt.Load(web, wb => wb.ServerRelativeUrl);
        cxt.ExecuteQuery();

        List list = web.Lists.GetByTitle(libraryName);
        cxt.Load(list);
        cxt.ExecuteQuery();

        CamlQuery camlQuery = new CamlQuery();
        camlQuery.ViewXml = "<View Scope='Recursive'><RowLimit>5000</RowLimit></View>";

        do
        {
            ListItemCollection listItems = list.GetItems(camlQuery);
            cxt.Load(listItems);
            cxt.ExecuteQuery();

            items.AddRange(listItems);
            camlQuery.ListItemCollectionPosition = listItems.ListItemCollectionPosition;

        } while (camlQuery.ListItemCollectionPosition != null);

        var filteritems = items.Where(tt => tt.FieldValues["FileRef"].ToString().StartsWith(web.ServerRelativeUrl + subFolders));

        return filteritems;
    }
}