我正在使用客户端对象模型方法C#,以便从包含子文件夹的文档库中检索所有列表项。我检查了MSDN文档,我被困在为什么我无法获得字段属性,或者我甚至做到了这一点。
NetworkCredential credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
ClientContext clientcontext = new ClientContext(Resources.defaultSPSite);
clientcontext.Credentials = credentials;
//Load Libraries from SharePoint
//Web site = clientcontext.Web;
clientcontext.Load(clientcontext.Web.Lists);
clientcontext.ExecuteQuery();
//List sharedDocumentsList = clientcontext.Web.Lists.GetByTitle("TestLDOCS");
//CamlQuery camlQuery = new CamlQuery();
//camlQuery.ViewXml = @"<View Scope='Recursive'><Query></Query></View>";
foreach (List list in clientcontext.Web.Lists)
{
clientcontext.Load(list);
clientcontext.ExecuteQuery();
//list.TemplateFeatureId.ToString().Equals("") &&
string baseType = list.BaseType.ToString();
string listTitle = list.Title.ToString();
if (list.BaseType.ToString().Equals("DocumentLibrary", StringComparison.InvariantCultureIgnoreCase) && list.Title.ToString().Equals("TestLDOCS", StringComparison.InvariantCultureIgnoreCase))
{
foreach (Folder subFolder in list.RootFolder.Folders)
{
foreach (File f in subFolder.Files)
{
Console.WriteLine((string) f.Title);
}
}
}
}
}
我收到的错误是“foreach(subFolder.Files中的文件f)”集合可能未初始化错误。无论如何使用CSOM获取文档库中每个子文件夹中所有文档的字段值?
我知道您可以使用列表项(listItem [“fieldName”])强烈键入字段值。我应该走这条路吗?
答案 0 :(得分:10)
一些建议:
1)首选ClientRuntimeContext.LoadQuery method加载特定列表,例如:
var lists = ctx.LoadQuery(ctx.Web.Lists.Where(l => l.BaseType == BaseType.DocumentLibrary));
ctx.ExecuteQuery();
2)由于SharePoint SCOM支持Request Batching,因此建议最小化对服务器的请求数。以下示例演示了如何对服务器执行单个请求,以便从文档库加载所有文件:
foreach (var list in lists)
{
var items = list.GetItems(CreateAllFilesQuery());
ctx.Load(items, icol => icol.Include(i => i.File));
results[list.Title] = items.Select( i=>i.File);
}
ctx.ExecuteQuery();
3)更喜欢通过CAML查询加载所有文件,如下所示:
public static CamlQuery CreateAllFilesQuery()
{
var qry = new CamlQuery();
qry.ViewXml ="<View Scope=\"RecursiveAll\"><Query><Where><Eq><FieldRef Name=\"FSObjType\" /><Value Type=\"Integer\">0</Value></Eq></Where></Query></View>";
return qry;
}
然后以下示例将返回库中的所有文件:
var items = list.GetItems(CreateAllFilesQuery());
ctx.Load(items, icol => icol.Include(i => i.File));
ctx.ExecuteQuery();
var files = items.Select( i=>i.File).ToList();
从性能角度加载特定列表是更优化的方式
完整示例
如何使用SharePoint CSOM从文档库加载所有文件:
using (var ctx = new ClientContext(webUri))
{
var results = new Dictionary<string, IEnumerable<File>>();
var lists = ctx.LoadQuery(ctx.Web.Lists.Where(l => l.BaseType == BaseType.DocumentLibrary));
ctx.ExecuteQuery();
foreach (var list in lists)
{
var items = list.GetItems(CreateAllFilesQuery());
ctx.Load(items, icol => icol.Include(i => i.File));
results[list.Title] = items.Select( i=>i.File);
}
ctx.ExecuteQuery();
//Print results
foreach (var result in results)
{
Console.WriteLine("List: {0}",result.Key);
foreach (var file in result.Value)
{
Console.WriteLine("File: {0}", file.Name);
}
}
}
答案 1 :(得分:1)
foreach (List list in clientcontext.Web.Lists)
{
clientcontext.Load(list);
clientcontext.ExecuteQuery();
//list.TemplateFeatureId.ToString().Equals("") &&
string baseType = list.BaseType.ToString();
string listTitle = list.Title.ToString();
if (list.BaseType.ToString().Equals("DocumentLibrary", StringComparison.InvariantCultureIgnoreCase) && list.Title.ToString().Equals("TestLDOCS", StringComparison.InvariantCultureIgnoreCase))
{
foreach (Folder subFolder in list.RootFolder.Folders)
{
clientcontext.Load(subFolder.Files);
clientcontext.ExecuteQuery();
foreach (File f in subFolder.Files)
{
Console.WriteLine((string) f.Title);
}
}
}
}
}