MOSS Object Model

Add Permission Level to a Sharepoint user group collection

Madhawa Karunaratne — Tue, 18 Aug 2009 04:06:21 GMT

        /// <summary>
        /// Add Permission Level to a Sharepoint user group collection
        /// </summary>
        /// <param name="spWeb">The sp web.</param>
        /// <param name="permissionName">Name of the permission.</param>
        /// <param name="groupCollection">The group collection.</param>
        public static void AddPermissionsToGroupCollection(SPWeb spWeb, string permissionName, string[] groupCollection)
        {
            SPSecurity.RunWithElevatedPrivileges(delegate
            {
                try
                {
                    //Allow updating of some sharepoint lists, (here spUsers, spGroups etc...)
                    spWeb.AllowUnsafeUpdates = true;

SPRoleDefinition roleDefinition = spWeb.RoleDefinitions[permissionName];

foreach (string group in groupCollection)
{

SPGroup spGroup = spWeb.Groups[group];

SPRoleAssignment roleAssignment = new SPRoleAssignment(spGroup);
SPRoleDefinitionBindingCollection roleDefBindings = roleAssignment.RoleDefinitionBindings;

roleDefBindings.Add(roleDefinition);
spWeb.RoleAssignments.Add(roleAssignment);

roleDefinition.Update();
}

                }
                catch (Exception ex)
                {
                    //Error handling logic should go here
                    throw ex;
                }
                finally
                {
                    spWeb.AllowUnsafeUpdates = false;
                }
            });
        }

Ok this is it.

Well... I called above method from "FeatureActivated" event of a feature. For "FeatureDeactivating" event I tried to achieve the contrary to this, delete a permission level from a user group. But didn't succeed. :(

If you have any idea pls let us know.Thanks in advance.

Get value collection of a SharePoint Choice Field

Madhawa Karunaratne — Sat, 01 Aug 2009 09:01:40 GMT

public static List<string> GetChoiceFieldValues(string listName,string fieldName, string siteCollection, string webSite)
{
List<string> fieldList;

SPSite spSite = null;
SPWeb spWeb = null;

            try
            {
                if (siteCollection != null)
                    spSite = new SPSite(siteCollection);
                else
                    spSite = SPContext.Current.Site;

                if (webSite != null)
                    spWeb = spSite.OpenWeb(webSite);
                else
                    spWeb = spSite.OpenWeb();

SPList spList = spWeb.Lists[listName];

SPFieldChoice field = (SPFieldChoice)spList.Fields[fieldName];

fieldList = new List<string>();

                foreach (string str in field.Choices)
                {
                    fieldList.Add(str);
                }
            }
            catch (Exception ex)
            {
                LogException(ex);
                throw;
            }
            finally
            {
                if(spWeb != null)
                    spWeb.Close();

                if(spSite != null)
                    spSite.Close();
            }

return fieldList;
}

Add a user programmatically to a User Group in SharePoint

Madhawa Karunaratne — Tue, 18 Nov 2008 12:47:11 GMT

        /// <summary>
        /// Add a user to a Sharepoint group
        /// </summary>
        /// <param name="userLoginName">Login name of the user to add</param>
        /// <param name="userGroupName">Group name to add</param>
        private void AddUserToAGroup(string userLoginName, string userGroupName)
        {
            //Executes this method with Full Control rights even if the user does not otherwise have Full Control
            SPSecurity.RunWithElevatedPrivileges(delegate
            {
                //Don't use context to create the spSite object since it won't create the object with elevated privileges but with the privileges of the user who execute the this code, which may casues an exception
                using (SPSite spSite = new SPSite(Page.Request.Url.ToString()))
                {
                    using (SPWeb spWeb = spSite.OpenWeb())
                    {
                        try
                        {
                            //Allow updating of some sharepoint lists, (here spUsers, spGroups etc...)
                            spWeb.AllowUnsafeUpdates = true;

SPUser spUser = spWeb.EnsureUser(userLoginName);

                            if (spUser != null)
                            {
                                SPGroup spGroup = spWeb.Groups[userGroupName];

                                if (spGroup != null)
                                    spGroup.AddUser(spUser);
                            }
                        }
                        catch (Exception ex)
                        {
                            //Error handling logic should go here
                        }
                        finally
                        {
                            spWeb.AllowUnsafeUpdates = false;
                        }
                    }
                }

});
}

Here in this method you have to set "spWeb.AllowUnsafeUpdates = true" to allow updating some sharepoint lists.