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。
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;
}
}