设置项目权限答案

【问题标题】：Set Item Permissions设置项目权限
【发布时间】：2017-10-23 14:57:05
【问题描述】：

文件夹工作：

我现在知道如何在库中设置文件夹的权限了：

public void ChangeItemPermissions()
{
    _SharePoint.ClientContext _ClientContext = new _SharePoint.ClientContext("https://sharepoint.oshirowanen.com/sites/oshirodev/");
    _ClientContext.Credentials = new NetworkCredential("user", "pass", "oshirowanen.com");

    _SharePoint.Principal user = _ClientContext.Web.EnsureUser(@"oshirowanen\tom");

    var _List = _ClientContext.Web.Lists.GetByTitle("Library1");
    var _Item = _List.LoadItemByUrl("/sites/oshirodev/Library1/Folder1");
    var roleDefinition = _ClientContext.Site.RootWeb.RoleDefinitions.GetByType(_SharePoint.RoleType.Reader);
    var roleBindings = new _SharePoint.RoleDefinitionBindingCollection(_ClientContext) { roleDefinition };
    _Item.BreakRoleInheritance(false,true);
    _Item.RoleAssignments.Add(user, roleBindings);

    _ClientContext.ExecuteQuery();
}

文件尝试：

我已经尝试将文件名添加到这一行：

var _Item = _List.LoadItemByUrl("/sites/oshirodev/Library1/Folder1/File1.docx");

注意添加到上述行末尾的 (/File1.docx)。

收到错误：

但这只会报错：

System.NullReferenceException was unhandled
  HResult=-2147467261
  Message=Object reference not set to an instance of an object.
  Source=ItemPermissions
  StackTrace:
       at ItemPermissions.Form1.ChangeItemPermissions() in c:\Users\Oshirowanen\Documents\Visual Studio 2013\Projects\ItemPermissions\ItemPermissions\Form1.cs:line 46
       at ItemPermissions.Form1.button1_Click(Object sender, EventArgs e) in c:\Users\Oshirowanen\Documents\Visual Studio 2013\Projects\ItemPermissions\ItemPermissions\Form1.cs:line 345
       at System.Windows.Forms.Control.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ButtonBase.WndProc(Message& m)
       at System.Windows.Forms.Button.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at ItemPermissions.Program.Main() in c:\Users\Oshirowanen\Documents\Visual Studio 2013\Projects\ItemPermissions\ItemPermissions\Program.cs:line 18
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException:

相关信息：

这是在本地计算机上运行的 WinForm 应用程序，使用 C# 创建，使用 .NET 4.0。 SharePoint 版本是 2010。

问题：

如何设置特定文件的权限？我已经知道如何为特定文件夹设置权限。

【问题讨论】：

标签： c# .net sharepoint sharepoint-2010 csom

【解决方案1】：

我查看了2010 CSOM documentation，您使用的 LoadItemByUrl 方法不存在。那是你写的扩展，也许是this one？如果是这样，那么问题一定出在那个扩展中，可能在 CAML query 中。

作为参考，此 2010 CSOM 代码在 SharePoint 2010 实验室中运行良好。请注意，它使用 GetItemByID：

        ClientContext _ClientContext = new ClientContext("http://team/sites/Team1/");
        _ClientContext.Credentials = new NetworkCredential("administrator", "*****", "corp");
        Principal user = _ClientContext.Web.EnsureUser(@"corp\administrator");
        var _List = _ClientContext.Web.Lists.GetByTitle("Shared Documents");
        var _Item = _List.GetItemById(23);
        var roleDefinition = _ClientContext.Site.RootWeb.RoleDefinitions.GetByType(RoleType.Reader);
        var roleBindings = new RoleDefinitionBindingCollection(_ClientContext) { roleDefinition };
        _Item.BreakRoleInheritance(false, true);
        _Item.RoleAssignments.Add(user, roleBindings);
        _ClientContext.ExecuteQuery();

【讨论】：

不幸的是，由于不可预见的情况，我上周无法使用计算机。如何指定文件而不是 GetItemById？

【解决方案2】：

我认为andresm53 使用他提到的扩展方法是正确的。

要使此方法适用于您需要通过FileLeafRef（文件名）查询的文件，并确保将FileLeafRef 添加到查询ViewFields。

/编辑

还有一件非常重要的事情，将文件查询限制为精确的文件夹：

query.FolderServerRelativeUrl = System.IO.Path.GetDirectoryName(url).Replace("\\", "/");

下面的工作代码：

void Main()
{
    ClientContext context = new ClientContext("https://sharepoint.oshirowanen.com/sites/oshirodev/");
    context.Credentials = new NetworkCredential("user", "pass", "oshirowanen.com");
    Principal user = context.Web.EnsureUser(@"oshirowanen\tom");
    ChangeItemPermissions(context, "/sites/oshirodev/Library1/Folder1/File1.docx", "Library1", user, RoleType.Reader);
}

// Define other methods and classes here
public static ListItem LoadItemByUrl(List list, string url)
{
    var context = list.Context;
    string ext = System.IO.Path.GetExtension(url);

    var query = new CamlQuery();
    if (string.IsNullOrEmpty(ext))
        query.ViewXml = String.Format("<View><RowLimit>1</RowLimit><Query><Where><Eq><FieldRef Name='FileRef'/><Value> Type='Url'>{0}</Value></Eq></Where></Query></View>", url);
    else
    {
        query.ViewXml = String.Format("<View><ViewFields><FieldRef Name=\"FileLeafRef\" /></ViewFields><Query><Where><Eq><FieldRef Name=\"FileLeafRef\" /><Value Type=\"Text\">{0}</Value></Eq></Where></Query><RowLimit>1</RowLimit></View>", System.IO.Path.GetFileName(url));
        query.FolderServerRelativeUrl = System.IO.Path.GetDirectoryName(url).Replace("\\", "/");
    }

    var items = list.GetItems(query);
    context.Load(items);
    context.ExecuteQuery();
    return items.Count > 0 ? items[0] : null;
}

public void ChangeItemPermissions(ClientContext context, string url, string listName, Principal user, RoleType type)
{    
    var list = context.Web.Lists.GetByTitle(listName);
    var item = LoadItemByUrl(list, url);
    var roleDefinition = context.Site.RootWeb.RoleDefinitions.GetByType(type);
    var roleBindings = new RoleDefinitionBindingCollection(context) { roleDefinition };
    item.BreakRoleInheritance(false, true);
    item.RoleAssignments.Add(user, roleBindings);
    context.ExecuteQuery();
}

【讨论】：

为这个答案增加了更多的赏金，因为上周我因意外无法访问计算机而无法接受答案。这个答案很好用。感谢您的帮助！

【解决方案3】：

您没有在上下文中加载任何内容。您需要使用“查询”加载您的上下文才能执行，如果您在不加载的情况下执行，它不会做任何事情。这可能需要稍作改动，但这个概念是正确的。

var _List = _ClientContext.Web.Lists.GetByTitle("Library1");
var _Item = _List.LoadItemByUrl("/sites/oshirodev/Library1/Folder1");
_ClientContext.Load(_Item);
_ClientContenxt.ExecuteQuery(); 

var roleDefinition = _ClientContext.Site.RootWeb.RoleDefinitions.GetByType(_SharePoint.RoleType.Reader);
_ClientContext.Load(roleDefinition);
_ClientContenxt.ExecuteQuery();

var roleBindings = new _SharePoint.RoleDefinitionBindingCollection(_ClientContext) { roleDefinition };
_Item.BreakRoleInheritance(false,true);
_Item.RoleAssignments.Add(user, roleBindings);

_ClientContext.Load(_Item);
_ClientContext.ExecuteQuery();

【讨论】：

我刚刚尝试过，但如果我包含 File1.docx，我仍然会收到相同的错误消息。
这有帮助吗？ morgantechspace.com/2016/04/…
@andresm53，我之前尝试过该代码，但我认为它适用于较新版本的共享点。它给了我 2 个错误 cannot convert lambda pxpression 和 does not contain a definition for SiteUsers。我正在使用 SharePoint 2010。

【解决方案4】：

试试这个。

 static void Main()
        {
            string siteUrl = "Your site url";
            ClientContext clientContext = new ClientContext(siteUrl);

            var list = clientContext.Web.Lists.GetByTitle("JZhu");
            var items = list.GetItems(CamlQuery.CreateAllItemsQuery());
            clientContext.Load(items);
            clientContext.ExecuteQuery();

            clientContext.Load(clientContext.Web.SiteGroups);
            clientContext.ExecuteQuery();

            GroupCollection oSiteCollectionGroups= clientContext.Web.SiteGroups;
            foreach (Group grp in oSiteCollectionGroups)
            {
                Console.WriteLine(grp.Title);
                if (grp.Title == "My group")
                {
                    oGroup=gpr;
                    break;
                }
            }

            foreach (var item in items)
            {
                var folder = GetListItemFolder(item); //get Folder
                Console.WriteLine(folder.Name);
                if (folder.Name=="Folder 1" || folder.Name=="Folder 2")
                {
                    item.BreakRoleInheritance(false);
                    RoleDefinitionBindingCollection collRoleDefinitionBinding = new RoleDefinitionBindingCollection(clientContext);

                    //set role type
                    collRoleDefinitionBinding.Add(clientContext.Web.RoleDefinitions.GetByType(RoleType.Reader));
                    //oGroup - your group
                    item.RoleAssignments.Add(oGroup, collRoleDefinitionBinding);

                    clientContext.ExecuteQuery();
                }
            }
        }

        private static Folder GetListItemFolder(ListItem listItem)
        {
            var folderUrl = (string)listItem["FileDirRef"];
            var parentFolder = listItem.ParentList.ParentWeb.GetFolderByServerRelativeUrl(folderUrl);
            listItem.Context.Load(parentFolder);
            listItem.Context.ExecuteQuery();
            return parentFolder;
        }

【讨论】：

【解决方案5】：

我猜你的问题与你使用的路径有关：

 _Item = _List.LoadItemByUrl("/sites/oshirodev/Library1/Folder1/File1.docx");

试试这个

 Uri filename = new Uri(@"http://server//oshirodev/Library1/Folder1/File1.docx");

 string server = filename.AbsoluteUri.Replace(filename.AbsolutePath, "");

 Microsoft.SharePoint.Client.ClientContext clientContext = new Microsoft.SharePoint.Client.ClientContext(server);

_ClientContext.Credentials = new NetworkCredential("user", "pass", "oshirowanen.com");

_SharePoint.Principal user = _ClientContext.Web.EnsureUser(@"oshirowanen\tom");

var roleDefinition = _ClientContext.Site.RootWeb.RoleDefinitions.GetByType(_SharePoint.RoleType.Reader);
var roleBindings = new _SharePoint.RoleDefinitionBindingCollection(_ClientContext) { roleDefinition };
_Item.BreakRoleInheritance(false,true);
_Item.RoleAssignments.Add(user, roleBindings);

_ClientContext.ExecuteQuery();

【讨论】：