Issue with Updating an already updated Sharepoint recurring calendar item - sharepoint

I am trying to update a recurring calendar list instance, when i update the first time it all works fine but when i fetch the updated item and try to update it, than it does not get updated.Here is the code i have done to update a recurring item
//fetch List item, in my case it will be exact one item per day
list = web.Lists["Calendar"];
SPQuery query1 = new SPQuery();query1.Query = string.Concat(
//Today"<Where><DateRangesOverlap>","<FieldRef Name='EventDate' />","<FieldRef Name='EndDate' />","<FieldRef Name='RecurrenceID' />","<Value type='DateTime'>","<Today/>","</Value>","</DateRangesOverlap>",
"</Where>");
query1.ExpandRecurrence = true;
query1.CalendarDate = DateTime.Parse(txtCalendarDate.Text);
//as only one item is fetched updated the fetched item
SPListItem Newitem = list.Items.Add();
//The guid of the recurrence item id
string uid_old = Convert.ToString(items[0]["UID"]);
Newitem["UID"] = new Guid(uid_old);
Newitem["Title"] = ttl;
Newitem["Location"] = ttl;
//Override the EventDate and EndDate
Newitem["EventDate"] = startdate;//Same date as item fetched but different time
Newitem["EndDate"] = Enddate;//Same date as item fetched but different time
// recurrence item’s ID
int masterID;
if (Convert.ToString(items[0]["MasterSeriesItemID"]) == "" || Convert.ToString(items[0]["MasterSeriesItemID"]) == "0")
masterID = items[0].ID;
else
masterID = Convert.ToInt32(items[0]["MasterSeriesItemID"]);
Newitem["MasterSeriesItemID"] = masterID;
//Take recurrence item’s EventDate as RecurrenceID
Newitem["RecurrenceID"] = Convert.ToDateTime(items[0]["EventDate"].ToString());
Newitem["fRecurrence"] = 1;
Newitem["fAllDayEvent"] = 0;
Newitem["TimeZone"] = items[0]["TimeZone"].ToString();// What ever is the time zone.
//4 for override the recurrence item
Newitem["EventType"] = 4;
Newitem["RecurrenceData"] = Convert.ToString(items[0]["RecurrenceData"]);
Newitem.Update();
list.Update();
Can anyone help me figure out why the update is not working the second time i try to update? The updated entry is fetched properly, but it does not update it. The 1st time updated entry remains as it is and can be seen in Current Events in All Events another entry gets created but it is not reflected in the recurring item and during the same day if i try to fetch the entry than the 1st time updated entry is fetched.
Please refer image:
http://social.msdn.microsoft.com/Forums/getfile/185919
Please Help ME~

Related

Get entries count for a multiple category view (two categories) using a key (Xpages)

I am trying to retrieve the entries count for a multiple category view (two categories) using a key.
var db:NotesDatabase = session.getDatabase(sessionScope.serverPath,sessionScope.dbName);
var luview = db.getView(sessionScope.viewName);
var vec:NotesViewEntryCollection = null;
if (key != null) {
vec = luview.getAllEntriesByKey(key);
}
count = vec.getCount().toFixed()
The count being returned is incorrect. I have over 500 documents in the view. It seems to be returning just the document count (20) of the first sub-category.
I've found mention of this as a bug in the forums. I'm running this on a 9.0 server. Any pointers would be much appreciated.
What I would like is the total count - categories (25) + documents (500), that I can use in the repeat control limit.
Thanks,
Dan
I was able to resolve this by using the NotesViewNavigator.
var nav:NotesViewNavigator = v.createViewNavFromCategory(key);
var entry:NotesViewEntry = nav.getFirst();
while (entry != null) {
count = count + 1;
var tmpentry:NotesViewEntry = nav.getNext(entry);
entry.recycle();
entry = tmpentry;
}
Dan - If you can get the entry count into the view column with an #AllChildren... or #AllDecendents or something like that then using the view navigator you should be able to read that value in and not have to actually loop through all the documents.
Another way is to create a different view, could be hidden, and not categorize that second column. Then you're original solution should work I'd think.

The Requested Resources was not found or you do not have sufficient permissions to view it

Dynamics crm when retrieving value and updating it into another entity it showing like
The Requested Resources was not found or you do not have sufficient permissions to view it
i specified update ids like
enobj.Id=(Guid)context.OutputParameters["id"];
message:create
service :update on another entity
this is my code:
Query Expression query = new Query Expression();
query.EntityName = en.LogicalName;
query.ColumnSet = new ColumnSet("new_amount");
var x = service.RetrieveMultiple(query);
Entity enobj = new Entity("new_product");
int i = 0;
foreach (var item in x.Entities)
{
i = i + (int)item.Attributes["new_amount"];
enobj.Attributes["new_grandtotal"] = i;
}
enobj.Id=(Guid)context.OutputParameters["id"];
// en.Id = enobj.Id;
enobj.Id = en.Id;
service.Update(enobj);
message:create
service :update
i have two entites product and productlineitems
in productlineitems iam creating a record with the field amount 50 after creating that value.iam updating on product entity.
again i create productlineitem 2 with the value some 90.iam adding 50+90 =140
again lineitem 3 with the value. iam taking that on product entity
message:create --- productlineitems
service :update --- product
I think you are trying to update Product with Product Line Id. Try the following:
Replace
enobj.Id = en.Id;
With
// set the field name (key) based on what you got in system
enobj.Id = (Guid)en["new_productid"];
Also, Calling Context is set to Current user. So make sure that user have permissions to update Product.

Recurring Events in SharePoint - Incorrect "Duration"

Background:
The company I work for has a regular SharePoint list with a custom ContentType (that does not inherit from a calendar list item) that it uses for Events. It then shows these using a calendar view. Seems simple enough.
We have the need to allow the user to choose a timezone for the event (different from their regional setting) that they are adding and to add the information to sharepoint such that it will show the correct time for each user looking at it world wide (based on their regional setting of course).
I added a list to SharePoint that is used to lookup SystemTimeZones (basically a SharePoint List representation of TimeZoneInfo.GetSystemTimeZones())
SPList timeZonesList = thisWeb.Lists.TryGetList("SystemTimeZones");
if(timeZonesList == null)
{
string title = "SystemTimeZones";
string description = "SharePoint List representation of TimeZoneInfo.GetSystemTimeZones() used for lookup.";
Guid newListId = thisWeb.Lists.Add(title, description, SPListTemplateType.GenericList);
timeZonesList = thisWeb.Lists.GetList(newListId, true);
timeZonesList.Fields.Add("SystemTimeZoneId", SPFieldType.Text, true);
timeZonesList.Fields.Add("SystemTimeZoneName", SPFieldType.Text, true);
SPView defaultTimeZonesView = timeZonesList.DefaultView;
defaultTimeZonesView.ViewFields.Add("SystemTimeZoneId");
defaultTimeZonesView.ViewFields.Add("SystemTimeZoneName");
defaultTimeZonesView.Update();
foreach (TimeZoneInfo timeZone in TimeZoneInfo.GetSystemTimeZones())
{
SPListItem temp = timeZonesList.AddItem();
temp["SystemTimeZoneId"] = timeZone.Id;
temp["SystemTimeZoneName"] = timeZone.DisplayName;
temp.Update();
}
}
I'm using this list for the lookup item for EventTimeZone in my custom add and edit forms for this list. The forms are direct copies of what SharePoint Designer would create (in that they are using the SharePoint:FormField's) they are just in Visual Studio bc I needed code-behind. I wanted to allow the users to see the events in their Regional TimeZone however when they edit them I wanted to show them in the TimeZone they were entered. (IE my regional timezone is Central so when I look at a Mountain meeting it will show me 10-11am but when I edit that same meeting it will say it is 9-10am). So on page load of edit I adjust the times:
SPListItem thisEvent = eventsList.GetItemById(savebutton1.ItemId);
if (thisEvent != null)
{
bool isAllDayEvent = false;
if (thisEvent["fAllDayEvent"] != null)
{
isAllDayEvent = (bool)thisEvent["fAllDayEvent"];
}
if (!isAllDayEvent)
{
SPFieldLookupValue lookupValue = new SPFieldLookupValue(thisEvent["Event Time Zone"].ToString());
TimeZoneInfo eventTimeZone = GetEventTimeZoneByListItemId(lookupValue.LookupId, rootWeb);
SPTimeZone regionalTimeZone = GetRegionalTimeZone(rootWeb);
DateTime regionalStartDateTime = Convert.ToDateTime(thisEvent["StartDate"]);
DateTime originalStartDateTime = TimeZoneInfo.ConvertTimeFromUtc(regionalTimeZone.LocalTimeToUTC(regionalStartDateTime), eventTimeZone);
ff3.ListItemFieldValue = originalStartDateTime;
DateTime regionalEndDateTime = Convert.ToDateTime(thisEvent["EndDate"]);
DateTime originalEndDateTime = TimeZoneInfo.ConvertTimeFromUtc(regionalTimeZone.LocalTimeToUTC(regionalEndDateTime), eventTimeZone);
ff4.ListItemFieldValue = originalEndDateTime;
}
else
{
// for some reason with all day events, sharepoint saves them
// as the previous day 6pm. but when they show up to any user
// they will show as 12am to 1159pm and show up correctly on the calendar
// HOWEVER, when it comes to edit, the start date isn't corrected on the
// form, so continuing to save without fixing it will continue to decrease
// the start date/time by one day
DateTime regionalStartDateTime = Convert.ToDateTime(thisEvent["StartDate"]);
ff3.ListItemFieldValue = regionalStartDateTime.AddDays(1);
}
All day events were strange but I was able to make it work by just writing test cases and see what happened (as you can see from my comments).
Then I tie into the list event receivers ItemAdded and ItemUpdated to "fix" the times since SharePoint is going to save them based on the user's regional setting and not the timezone the user chose. (Of course I'm slightly new to SharePoint -- not c# -- so I may have very much over complicated this, but I have been able to fine little documentation online). In the end I end up setting:
addedItem["StartDate"] = regionalTimeZone.UTCToLocalTime(correctedEventStart.ToUniversalTime());
addedItem["EndDate"] = regionalTimeZone.UTCToLocalTime(correctedEventEnd.ToUniversalTime()); TADA!! It saves and display perfectly! I was so excited! Until... I tried to save a recurring event. All of my recurring events save wonderfully, it's not the recurring part that's messed up. For some reason, after I change the StartDate and EndDate on a recurring event and call addedItem.Update() it is recalculating the "Duration" as if it is a single even instead of a recurring event. Example: I have an event that happens for a week daily from 9-10. When I first enter ItemAdded my Duration is 3600 (1 hour) as it should be bc Duration is treated differently for recurring events. However after I adjust the times and call Update() the duration spans the entire week :( If I manually set the Duration:
if (isRecurrence)
{
addedItem["Duration"] = (correctedEventEnd.TimeOfDay - correctedEventStart.TimeOfDay).TotalSeconds;
}
It still gets reset on Update(). So when you view the recurring item in a Calendar View the item spans the entire week instead of showing once a day.
I have all but pulled my hair out trying to figure this out. Any guidance would be wonderful. I understand Duration is a calculated field but I can't understand why calling listItem.Update() would ignore the fact that it is indeed properly marked as a recurring event and not calculate the Duration correctly. This honestly seems like a bug with SP 2010.
Thanks in advance!
**
EDIT: Additional info after comments below...
**
This SharePoint env has a server in pacific time and users across all US TimeZones, London, Tokyo, Abu Dabi, etc. Users in one timezone need to be able to create events in other timezones. Since nothing in the user's profile (for us anyway) will tell us what timezone they would like to see everything in, we added code to our master page to look at the local machine's timezone and always set their regional setting accordingly.
Example: I am in Nashville and I want to create an event that will happen in LA:
The data in ItemAdded shows that StartDate is what I entered 9am. So I'm creating a date that has PST at the end of it:
DateTime correctedEventStart = DateTime.Parse(addedItem["StartDate"] + " " + eventTimeZone.GetUtcOffset(DateTime.UtcNow).Hours + ":" + eventTimeZone.GetUtcOffset(DateTime.UtcNow).Minutes);
DateTime correctedEventEnd = DateTime.Parse(addedItem["EndDate"] + " " + eventTimeZone.GetUtcOffset(DateTime.UtcNow).Hours + ":" + eventTimeZone.GetUtcOffset(DateTime.UtcNow).Minutes);
Then to "trick" SharePoint I'm converting that PST time into the users regional time (so the user doesn't have to know anything about their regional setting nor do they have to think). So 9am PST is 7am CST (bc that's what SharePoint expects the time to be in since that's my regional setting). Here's the converstion from the correct time+timezone to the user regional timezone:
addedItem["StartDate"] = regionalTimeZone.UTCToLocalTime(correctedEventStart.ToUniversalTime());
addedItem["EndDate"] = regionalTimeZone.UTCToLocalTime(correctedEventEnd.ToUniversalTime());
I don't know if this makes sense to anyone outside of my world. But SharePoint obviously expects the times to be in the user's regional (or the web's) timezone. That's obvious my from unit testing. If there is an OOB way for me to allow a user in Central Time to create a meeting from 9-10am Pacific Time in a custom list I would LOVE to be able to use that. But I haven't been able to find anything.
Again, all of this works great... until you come to Recurring Events. And actually it works for recurring events until you try to view said event in a Calendar View. Then it looks like this:
Notice that "Recurring 8" is recurring the way it's supposed to, daily for 2 instances. However, the "span" or "duration" of the recurrence is 2 days rather than 1 hour. Where as "Recurring 15" shows correctly. The only difference in field values between the two when output to debug is the "Duration" field. Recurring 8 had it's start and end date's updated in ItemAdded and Recurring 15 went through ItemAdded but the ListItem.Update() was commented out. Per documentation SharePoint is supposed to calculate Duration differently for recurring items than it does for single items. The fact that the start and end dates are changed using the object model should not negate that.
Ok, so the way I ended up handling this is as follows. I decided to back out of the list event receiver because it really does appear to be a SharePoint bug in the recalculation of Duration for recurring events now working correctly. I opted to tie into the save event on the form and changing the values before they are even sent. This seems to work so far in all scenarios. All of my math is the same as before. So in my New2.aspx (new item form for this list)
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
if ((SPContext.Current.FormContext.FormMode == SPControlMode.New) || (SPContext.Current.FormContext.FormMode == SPControlMode.Edit))
{
SPContext.Current.FormContext.OnSaveHandler += new EventHandler(SaveHandler);
}
}
protected void SaveHandler(object sender, EventArgs e)
{
Page.Validate();
if (Page.IsValid)
{
// fix times
SPFieldLookupValue lookupValue = new SPFieldLookupValue(ff5.Value.ToString());
TimeZoneInfo eventTimeZone = GetEventTimeZoneByListItemId(lookupValue.LookupId, SPContext.Current.Web);
SPTimeZone regionalTimeZone = GetRegionalTimeZone(SPContext.Current.Web);
bool isAllDayEvent = Convert.ToBoolean(ff6.Value);
bool isRecurrence = Convert.ToBoolean(ff11.Value);
DateTime correctedEventStart = DateTime.MinValue;
DateTime correctedEventEnd = DateTime.MinValue;
if (!isAllDayEvent && eventTimeZone != null && regionalTimeZone != null)
{
correctedEventStart = DateTime.Parse(ff3.Value.ToString() + " " + eventTimeZone.GetUtcOffset(DateTime.UtcNow).Hours + ":" + eventTimeZone.GetUtcOffset(DateTime.UtcNow).Minutes);
correctedEventEnd = DateTime.Parse(ff4.Value.ToString() + " " + eventTimeZone.GetUtcOffset(DateTime.UtcNow).Hours + ":" + eventTimeZone.GetUtcOffset(DateTime.UtcNow).Minutes);
ff3.ItemFieldValue = regionalTimeZone.UTCToLocalTime(correctedEventStart.ToUniversalTime());
ff4.ItemFieldValue = regionalTimeZone.UTCToLocalTime(correctedEventEnd.ToUniversalTime());
}
SPContext.Current.ListItem.Update();
}
}
This updates the times as my previous approach does but it will also calculate the duration correctly.
SharePoint handles displaying the correct time based on the user's regional settings (or web if the user hasn't set it) and displaying the correct times in calendar views. I did have to change the Edit form to have the correct values on edit:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
try
{
using (SPWeb rootWeb = SPContext.Current.Site.RootWeb)
{
SPList eventsList = rootWeb.Lists.TryGetList("Events");
if (eventsList != null)
{
SPListItem thisEvent = eventsList.GetItemById(savebutton1.ItemId);
if (thisEvent != null)
{
bool isAllDayEvent = false;
if (thisEvent["fAllDayEvent"] != null)
{
isAllDayEvent = (bool)thisEvent["fAllDayEvent"];
}
if (!isAllDayEvent)
{
SPFieldLookupValue lookupValue = new SPFieldLookupValue(thisEvent["Event Time Zone"].ToString());
TimeZoneInfo eventTimeZone = GetEventTimeZoneByListItemId(lookupValue.LookupId, rootWeb);
SPTimeZone regionalTimeZone = GetRegionalTimeZone(rootWeb);
DateTime regionalStartDateTime = Convert.ToDateTime(thisEvent["StartDate"]);
DateTime originalStartDateTime = TimeZoneInfo.ConvertTimeFromUtc(regionalTimeZone.LocalTimeToUTC(regionalStartDateTime), eventTimeZone);
ff3.ListItemFieldValue = originalStartDateTime;
DateTime regionalEndDateTime = Convert.ToDateTime(thisEvent["EndDate"]);
DateTime originalEndDateTime = TimeZoneInfo.ConvertTimeFromUtc(regionalTimeZone.LocalTimeToUTC(regionalEndDateTime), eventTimeZone);
ff4.ListItemFieldValue = originalEndDateTime;
}
else
{
// for some reason with all day events, sharepoint saves them
// as the previous day 6pm. but when they show up to any user
// they will show as 12am to 1159pm and show up correctly on the calendar
// HOWEVER, when it comes to edit, the start date isn't corrected on the
// form, so continuing to save without fixing it will continue to decrease
// the start date/time by one day
DateTime regionalStartDateTime = Convert.ToDateTime(thisEvent["StartDate"]);
ff3.ListItemFieldValue = regionalStartDateTime.AddDays(1);
}
}
}
}
}
catch (Exception ex)
{
DebugLogger.WriteLine(ex);
}
}
}
The Edit form has the same OnInit and SaveHandler as New.
I think you are running afoul of the shennagins that SharePoint uses for reccuring events. Essentially the events are stored in a single list item and expanded at query time. This makes the storage of events quite counter intuitive to how you expect.
From that post it looks like the EventDate and EndDate fields are used differently depending on the recurrence or not.
Also be aware the SharePoint stores dates in UTC 'under the hood' and converts back to the users (or websites) timezone on display. You may be able to use this knowledge to optimise some of the date logic.
More information
http://fatalfrenchy.wordpress.com/2010/07/16/sharepoint-recurrence-data-schema/
Share point 2010 ItemAdding insert Recurrence data on calendar
http://blog.tylerholmes.com/2012/02/how-sharepoint-deals-with-time-and-time.html
Here is the code I used to create an occuring event in another timezone (note: I did not explicitly set the duration)
public void AddRecurringItemGTM8Perth(SPList list)
{
string recData = "<recurrence><rule><firstDayOfWeek>su</firstDayOfWeek><repeat><daily dayFrequency=\"1\" /></repeat><windowEnd>2013-02-20T01:00:00Z</windowEnd></rule></recurrence>";
SPListItem newitem = list.Items.Add();
newitem["Title"] = "Perth " + DateTime.Now.ToString();
newitem["RecurrenceData"] = recData;
newitem["EventType"] = 1;
DateTime correctedEventStart = new DateTime(2013, 2, 3, 12, 0, 0);
//note that date is end of event and time is event end to calculate duration
DateTime correctedEventEnd = new DateTime(2013, 2, 20, 13, 0, 0);
SPTimeZone spTz = SPRegionalSettings.GlobalTimeZones[74]; //perth
correctedEventStart = spTz.LocalTimeToUTC(correctedEventStart);
correctedEventEnd = spTz.LocalTimeToUTC(correctedEventEnd);
correctedEventStart = list.ParentWeb.RegionalSettings.TimeZone.UTCToLocalTime(correctedEventStart);
correctedEventEnd = list.ParentWeb.RegionalSettings.TimeZone.UTCToLocalTime(correctedEventEnd);
newitem["Start Time"] = correctedEventStart;
newitem["End Time"] = correctedEventEnd;
newitem["Recurrence"] = true;
newitem["fAllDayEvent"] = false;
newitem["WorkspaceLink"] = false;
newitem["UID"] = Guid.NewGuid();
newitem.Update();
list.Update();
}
So I convert from users "local" to UTC and then back to the web local.
The UID is necessary or there is an error when you click on the event.
If you want a recurrence of 13 say... the code is:
string recData = "<recurrence><rule><firstDayOfWeek>su</firstDayOfWeek><repeat><daily dayFrequency=\"1\" /></repeat><repeatInstances>13</repeatInstances></rule></recurrence>";
DateTime correctedEventEnd = new DateTime(2013, 2, 3, 13, 0, 0).AddDays(13);
Whereas no end date is :
string recData = "<recurrence><rule><firstDayOfWeek>su</firstDayOfWeek><repeat><daily dayFrequency=\"1\" /></repeat><repeatForever>FALSE</repeatForever></rule></recurrence>";
DateTime correctedEventEnd = new DateTime(2013, 2, 3, 13, 0, 0).AddDays(998);
It might be quite old, but my answer may help someone.
You just have to explicitly put EventType = 1 in update as well.

Sharepoint: Trying to get the highest ows_ID inclusive of deleted items

I am using SharePoint web service and am trying to return the highest ID number from a list. My scenario is like say I have 10 items in a list. Highest ows_ID at this point is 10. Now, if I delete an item and check the max of ows_ID, I got 9, however the highest ows_ID is 10 inclusive of deletion.
If a new item gets inserted, it gets the ows_ID as 11 instead of 10. In the same way, is it possible to get the highest ows_ID even though the item is deleted?
You can call GetList to see the highest ID used. That method returns information about the list itself rather than the items in it.
Try "rowLimit", configure your CAML to do your stuff and only get the first item in the search criteria:
string rowLimit = "1";
System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument();
System.Xml.XmlElement query = xmlDoc.CreateElement("Query");
System.Xml.XmlElement viewFields = xmlDoc.CreateElement("ViewFields");
System.Xml.XmlElement queryOptions = xmlDoc.CreateElement("QueryOptions");
query.InnerXml = "<Where><Eq><FieldRef Name=\"FileLeafRef\"/><Value Type=\"" + fieldType + "\">" + fieldValue + "</Value></Eq></Where> ";
viewFields.InnerXml = "<FieldRef Name=\""+fieldToGet+"\" />";
queryOptions.InnerXml = "";
System.Xml.XmlNode nodes = myservice.GetListItems(listGuid, viewGuid, query, viewFields, rowLimit, null, null);
In my example below, I just get the last created item, using some criteria, but as You don't need this, just fix the caml in my code.

Update Item has Recurrence in SharePoint

I had an event list. I created a new item that has recurrence daily ( Start Time : 1/5/2010 12 : 00 AM and End Time : 5/30/2010 12:00 AM). I want to delete the item which has Start Time : 5/12/2010 12:00 AM but my application throwed exception.
My code as below :
DateTime eventDate = DateTime.Parse(list.Fields.GetFieldByInternalName("EventDate").GetFieldValueAsHtml(DateTime.Parse(this.DateTimeOfItem).ToUniversalTime()));
SPQuery pQuery = new SPQuery();
pQuery.ExpandRecurrence = true;
pQuery.CalendarDate = eventDate.AddDays(-1);
pQuery.Query = string.Format("<OrderBy><FieldRef Name=\"EventDate\"/></OrderBy><Where><And><DateRangesOverlap><FieldRef Name=\"EventDate\" /><FieldRef Name=\"EndDate\" /><FieldRef Name=\"RecurrenceID\" /><Value Type=\"DateTime\"><Week /></Value></DateRangesOverlap><Eq><FieldRef Name=\"ID\" /><Value Type=\"Counter\">{0}</Value></Eq></And></Where>", this.ID);
SPListItemCollection itemColl = list.GetItems(pQuery);
int index = 0;
while (index < itemColl.Count)
{
SPListItem item = itemColl[index];
if (DateTime.Parse(item["EventDate"].ToString()).CompareTo(eventDate) == 0)
{
web.AllowUnsafeUpdates = true;
item["UID"] = Guid.NewGuid().ToString();
item["EventType"] = 3;
item["RecurrenceID"] = eventDate;
item["MasterSeriesItemID"] = this.ID;
item["XMLTZone"] = null;
item["RecurrenceData"] = "Every 1 day(s)";
item.Update();
list.Update();
web.AllowUnsafeUpdates = false;
break;
}
index++;
}
I do not know why I can not update this item. Please help me.
Thanks
PD.
To delete an instance of a recurring event in SharePoint you have to actually add a NEW record and mark it as deleted.
To understand recurring events in SharePoint and keep your sanity you need to write a little utility to output the whole list (every field) to learn how they work. The CAML query is expanding out the recurring event into 'fake' instances and these can't be updated.
When you setup a recurring event you only add 1 record into the list no matter how many instances it has. This is the 'master record' and has the recurrence pattern in the RecurrenceDate field.
When you add an exception (e.g. either the instance on "1/5/2010 12 : 00 AM" has been deleted or moved to another date) then this is another NEW record.
In this exception record you have the following fields of interest
MasterSeriesItemID - The ID of the master recurrance record
EventType - 3 for a modified instance, 4 for a deleted instance
RecurrenceID - The datetime of the instance that this execption replaces
It refernces the orgional recurrance record
This is about the best reference around for Recurring Events.
Understanding the SharePoint calendar and how to export it to iCal format
Be aware that in SharePoint 2007 there are some pretty crazy bugs converting to/from UTC to site time in the RecurranceID field when you've got 'All Day Events' (either the master record or the exception)
Yes Ryan is correct. You need to add a new record to delete an instance of a recurring series. For detailed info check out this URL : http://sharepointtechie.blogspot.com/2010/08/deleting-individual-events-from.html

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