Yep I use TryGetList, and I have a common function to delete list if empty
which I call on feature deactivate:
/// <summary>
/// Delete list if exists on given web and has no items
/// </summary>
/// <param name="web">SPWeb list exists on</param>
/// <param name="listTitle">Title of list to delete</param>
public static void DeleteListIfEmpty(SPWeb web, string listTitle)
{
SPList list = web.Lists.TryGetList(listTitle);
if (list != null && list.ItemCount == 0)
{
list.Delete();
}
}
From: paul.no...@ceosyd.catholic.edu.au
To: ozmoss@ozmoss.com
Date: Thu, 1 Mar 2012 09:40:14 +1100
Subject: RE: The CORRECT way to delete specific list items by field ID
Can I ask opinions on the best method to check for al list’s existence in 2010?
I’ve been using the TryGetList method and passing in the DisplayName but am
surprised there doesn’t seem to be a way to get list by InternalName, only
StaticName??
// Check if list exists
try
{
SPList theList = SPContext.Current.Web.Lists.TryGetList(Title);
if (theList!=null)
{
From: ozmoss-boun...@ozmoss.com [mailto:ozmoss-boun...@ozmoss.com] On Behalf Of
Paul Noone
Sent: Thursday, 1 March 2012 9:08 AM
To: 'ozMOSS'
Subject: RE: The CORRECT way to delete specific list items by field ID
Actually, scratch that. I perform a check first. J
From: ozmoss-boun...@ozmoss.com [mailto:ozmoss-boun...@ozmoss.com] On Behalf Of
Paul Noone
Sent: Thursday, 1 March 2012 9:06 AM
To: 'ozMOSS'
Subject: RE: The CORRECT way to delete specific list items by field ID
Hi Nigel,
That sounds like good advice.
In my experience, I’ve noticed that if the list already exists it doesn’t get
overwritten and my sample items don’t get re-added (this is when provisioning
through code alone). XML list instances are another story. K
Is this by design??
From: ozmoss-boun...@ozmoss.com [mailto:ozmoss-boun...@ozmoss.com] On Behalf Of
Nigel Witherdin
Sent: Thursday, 1 March 2012 8:45 AM
To: ozMOSS
Subject: Re: The CORRECT way to delete specific list items by field ID
On features that create lists, on feature activation I tend to check of list
already exists and create it if it doesn't, and on deactivation delete the list
if it's empty. That way leaving user data available until the user takes the
decision to remove it
Sent from my iPhone
On Mar 1, 2012, at 8:37 AM, "Paul Noone" <paul.no...@ceosyd.catholic.edu.au>
wrote:
Yes, I was aware of that method and had used it. But then I realised the IDs
increment regardless of whether items have been deleted. So I’ve opted to just
send all the lists to the Recycle Bin on FeatureDeactivated. Much cleaner. J
Thanks for the help. I appreciate this list more than you know. J
From: ozmoss-boun...@ozmoss.com [mailto:ozmoss-boun...@ozmoss.com] On Behalf Of
Ishai Sagi
Sent: Thursday, 1 March 2012 6:02 AM
To: ozMOSS
Subject: RE: The CORRECT way to delete specific list items by field ID
Also - list.Items.DeleteItemById might be a better way?
<image002.jpg>Ishai Sagi | Solutions Architect
0488 789 786 | is...@exd.com.au | www.sharepoint-tips.com | @ishaisagi
From: ozmoss-boun...@ozmoss.com [mailto:ozmoss-boun...@ozmoss.com] On Behalf Of
Paul Noone
Sent: Tuesday, 28 February 2012 18:36
To: 'ozMOSS'
Subject: RE: The CORRECT way to delete specific list items by field ID
Thanks Sez. I had learnt that lesson with a previous custom action to bulk
delete items. J
In this case I do want them gone for good when the feature is deactivated. They
are just dummy items.
From: ozmoss-boun...@ozmoss.com [mailto:ozmoss-boun...@ozmoss.com] On Behalf Of
Sezai Komur
Sent: Wednesday, 29 February 2012 12:41 PM
To: ozMOSS
Subject: Re: The CORRECT way to delete specific list items by field ID
Another consideration when using SPListItem.Delete() in a custom solution is...
do you want the deleted item completely or do you want it to go to the recycle
bin?
.Delete() bypasses the recycle bin completely and permanently deletes the item,
if you want users to be able to recycle the deleted items instead use the
.Recycle() method.
http://blog.mastykarz.nl/programmatically-deleting-list-items-documents-recycle-bin/
http://msdn.microsoft.com/en-us/microsoft.sharepoint.splistitem.recycle
Sezai.
On Wed, Feb 29, 2012 at 8:41 AM, Paul Noone <paul.no...@ceosyd.catholic.edu.au>
wrote:
Ah…FFS. Thanks Mark.
I had that initially but the IDs were in quotes and I was getting “Operator ==
cannot be applied to operands of type int and string.” Which threw me
completely!
The following simplified method allso seems to work.
// Delete sample items
SPListItem item1 = bugsList.GetItemById(1);
item1.Delete();
SPListItem item2 = bugsList.GetItemById(2);
item2.Delete();
It’s the indexder and the SPItemCollection that seem to cause the issues. My
first attempt was to remove the first two items by index which fails because
index(0) changes with each deletion. J
From: ozmoss-boun...@ozmoss.com [mailto:ozmoss-boun...@ozmoss.com] On Behalf Of
Mark Daunt
Sent: Wednesday, 29 February 2012 11:21 AM
To: ozMOSS
Subject: Re: The CORRECT way to delete specific list items by field ID
Hi Paul,
It’s the bastard == that you’re missing in your if statement :-)
Mark
On 29/02/12 10:18 AM, "Paul Noone" <paul.no...@ceosyd.catholic.edu.au> wrote:
Hi all,
This should be easy, right? I’ve followed several methods as defined in MSDN
documentation but nothing worked as expected. A froeach loop was giving me
“Collection was modified; enumeration operation may not execute.”. So I’m now
using a decrementing for loop and getting the items by title. While this works,
it is not ideal.
I want to get the items by their field ID value but can’t get the syntax right.
I keep hitting “Operator '||' cannot be applied to operands of type int and
int”.
try{
SPList bugsList = oWeb.Lists["Project Issues Register"];
for (int i = bugsList.Items.Count - 1; i >= 0; i--)
{
if (bugsList.Items[i].ID = 1 || bugsList.Items[i].ID = 2)
{
bugsList.Items.Delete(i);
}
}
}
Figure 1 - Sample list
<image004.png>
Help?
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