Élément de liste à plusieurs utilisateurs d'autorisations par programmation (sharepoint)

nope, j'ai fait l'erreur simple de le mettre sous vérifié au lieu de la mise à jour, il y a également un travail autour de la fonction en cours d'exécution à plusieurs reprises lorsqu'il met à jour, il suffit de faire une colonne appelée "updateContributors" dans votre liste et la valeur par défaut True/Yes

Voici le code/pas le temps d'expliquer, mais assez commenté, bonne chance:

    using System;
using System.IO;
using System.Security.Permissions;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Security;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.Workflow;
//Debugging includes
using System.Diagnostics;
namespace ARDT.Notifications
{
///<summary>
///List Item Events
///</summary>
public class Notifications : SPItemEventReceiver
{
///<summary>
///An item was updated
///</summary>
public override void ItemUpdated(SPItemEventProperties properties)
{
if (properties.ListItem["updateContributors"].ToString().Equals("True"))
{
//work around so it goes through it only once instead of everytime the item is updated
properties.ListItem["updateContributors"] = "False";
SPSite site = new SPSite("http://sp2010dev/ardt/");
using (SPWeb web = site.OpenWeb())
{
SPList list = web.Lists["Document Collaboration"];
SPListItem listItem = properties.ListItem;
SPUser userName = null;
String toAddress = null;
//EMail initializations
bool appendHtmlTag = false;
bool htmlEncode = false;
string subject = "You have been assigned to a Document";
string message = "Test Message";
//get usernames
string tempFieldValue = listItem["Assigned To"].ToString();
string[] userNameArray = listItem["Assigned To"].ToString().Split(';');
//remove permissions first
web.AllowUnsafeUpdates = true;
listItem.BreakRoleInheritance(false);
SPRoleAssignmentCollection raCollection = listItem.RoleAssignments;
//remove exisiting permissions one by one
for (int a = raCollection.Count - 1; a >= 0; a--)
{
raCollection.Remove(a);
}
for (int i = 1; i < userNameArray.Length; i++)
{
tempFieldValue = userNameArray[i].Replace("#", "");
userName = web.AllUsers[tempFieldValue];
toAddress = userName.Email;
SPSecurity.RunWithElevatedPrivileges(delegate()
{
//EMAIL USER
bool result = SPUtility.SendEmail(web, appendHtmlTag, htmlEncode, toAddress, subject, message);
//PERMISSIONS                              
//grant permissions for specific list item
SPRoleDefinition roleDefintion = web.RoleDefinitions.GetByType(SPRoleType.Contributor);
SPRoleAssignment roleAssignment = new SPRoleAssignment(userName);
roleAssignment.RoleDefinitionBindings.Add(roleDefintion);
listItem.RoleAssignments.Add(roleAssignment);
listItem.Update();
});
i++;
}
}
//base.ItemUpdated(properties);
//after final update has been done return true
properties.ListItem["updateContributors"] = "True";
}
}
}
}