//在列表根目录下创建文件夹

        public static string CreatFolderToSPDocLib(string strFolderName, string strDocLibName)

        {

            string FolderPath = string.Empty;

            try

            {

                using (SPSite site = new SPSite(SiteUrl))

                {

                    using (SPWeb web = site.OpenWeb())

                    {

                        web.AllowUnsafeUpdates = true;

                        SPListCollection lists = web.GetListsOfType(SPBaseType.DocumentLibrary);

                        lists.IncludeRootFolder = true;

                        SPList list = lists[strDocLibName];

                        list.EnableFolderCreation = true;

                        SPListItem item = list.Items.Add(list.RootFolder.ServerRelativeUrl, SPFileSystemObjectType.Folder, strFolderName);

                        item.Update();

                        list.Update();

                        FolderPath = item["FileRef"].ToString();

                        web.AllowUnsafeUpdates = false;

                    }

                }

            }

            catch

            {

            }

            return FolderPath;

        }

　　//上传文件到文件夹，并授权给相关用户

        public static bool UpLoadFileToFolder(byte[] FileStream, string FileName, string FolderPath, string allLoginName)

        {

            try

            {

                using (SPSite site = new SPSite(SiteUrl))

                {

                    using (SPWeb web = site.OpenWeb())

                    {

                        web.AllowUnsafeUpdates = true;

                        SPFolder folder = web.GetFolder(FolderPath);

                        SPListItem listItem = folder.Files.Add(FileName, FileStream).Item;

                        //断开原来列表项所继承的权限,使其可以设置独立权限

                        listItem.BreakRoleInheritance(true);

                        //将原来所继承的权限通通移除

                        foreach (SPRoleAssignment roleAssignment in listItem.RoleAssignments)

                        {

                            roleAssignment.RoleDefinitionBindings.RemoveAll();

                            roleAssignment.Update();

                            listItem.Update();

                        }

                        //获取将要设置权限的用户

                        SPUser myUser = web.EnsureUser(allLoginName);

                        //定义权限分配

                        SPRoleAssignment myRoleAssignment = new SPRoleAssignment(myUser.LoginName, myUser.Email, myUser.Name, myUser.Notes);

                        //绑定设置的权限

                        myRoleAssignment.RoleDefinitionBindings.Add(web.RoleDefinitions.GetByType(SPRoleType.Reader));

                        //把这个权限加到我们的列表中

                        listItem.RoleAssignments.Add(myRoleAssignment);

                        listItem.Update();

                        web.AllowUnsafeUpdates = false;

                        return true;

                    }

                }

            }

            catch

            {

                return false;

            }

        }

        //通过ID获取列表项

        public static string GetRoleAssignmentsOfSPListItem(string ListName, int ItemID)

        {

            string reValue = http://www.mamicode.com/string.Empty;

            try

            {

                using (SPSite site = new SPSite(SiteUrl))

                {

                    using (SPWeb web = site.OpenWeb())

                    {

                        web.AllowUnsafeUpdates = true;

                        SPList list = web.Lists[ListName];

                        SPListItem item = list.Items.GetItemById(ItemID);

                        SPRoleAssignmentCollection Rolecoll = item.RoleAssignments;

                        foreach (SPRoleAssignment role in Rolecoll)

                        {

                            for (int i = 0; i < role.RoleDefinitionBindings.Count; i++)

                            {

                                reValue += (role.Member.LoginName + ":" + role.RoleDefinitionBindings[i].Name + ":" + role.RoleDefinitionBindings[i].BasePermissions.ToString());

                            }

                        }

                        web.AllowUnsafeUpdates = false;

                    }

                }

            }

            catch

            {

            }

            return reValue;

        }