记录一下如何在sharepoint server 2013文档库中，使用eventhandle控制文档库document library的条目item权限。
///<summary>
///已添加项.
///</summary>
public override void ItemAdded(SPItemEventProperties properties)
{
base.ItemAdded(properties);
SPSecurity.RunWithElevatedPrivileges(delegate()
{
if(properties.ListTitle =="共享文档1")
{
SPSite site =newSPSite(properties.SiteId);
SPWeb web =site.OpenWeb();
web.AllowUnsafeUpdates = true;
SPList list =web.Lists[properties.ListId];
SPFile file =list.GetItemById(properties.ListItemId).File;
SPListItem item = file.Item;
//权限断开，并且移除掉其它权限
if(!item.HasUniqueRoleAssignments)
{
item.BreakRoleInheritance(false);
}
//添加用户权限
SPUser CurrentUser =web.EnsureUser(properties.UserLoginName);
SPRoleAssignment MyRoleAssignment =newSPRoleAssignment(CurrentUser);
MyRoleAssignment.RoleDefinitionBindings.Add(web.RoleDefinitions.GetByType(SPRoleType.WebDesigner));
item.RoleAssignments.Add(MyRoleAssignment);
CurrentUser =web.EnsureUser("kw\\cxx");
MyRoleAssignment = newSPRoleAssignment(CurrentUser);
MyRoleAssignment.RoleDefinitionBindings.Add(web.RoleDefinitions.GetByType(SPRoleType.WebDesigner));
item.RoleAssignments.Add(MyRoleAssignment);
item.Update();
}
});
}