Programmatically Create Workspace Linked to an Event (LinkWithEvent)

In my SharePoint 2007 project, I created a workspace template that I wanted the customers to always use when they created their meeting workspace. So I needed to bypass the standard site creation page and programmatically add the sub site with the desired template.

Step 1 was to create my own custom list template based on the Calendar list. I need to do this so I could hide the Workspace column from the user. But more importantly, so I could add an event receiver that would do the work of creating the workspace site.

Step 2 was to create the event receiver for the ItemAdded event via a feature.

The feature.xml file is standard. Being sure to set the scope to "Web" as receivers cannot be scoped at the Site Collection level.

 

<?xml version="1.0" encoding="utf-8"?>

<Feature  Id="YOURGUIDHERE"

          Title="CalendarEventListEventReceiver"

          Description="Description for CalendarEventListEventReceiver"

          Version="12.0.0.0"

          Hidden="FALSE"

          Scope="Web"

          DefaultResourceFile="core"

          xmlns="http://schemas.microsoft.com/sharepoint/">

  <ElementManifests>

    <ElementManifest Location="elements.xml"/>

  </ElementManifests>

</Feature>

 

For the elements.xml ensure that the ListTemplateId attribute references the type of your list template.

<?xml version="1.0" encoding="utf-8" ?>

<Elements xmlns="http://schemas.microsoft.com/sharepoint/">

  <Receivers ListTemplateId="10002">

    <Receiver>

      <Name>ItemAdded</Name>

      <Type>ItemAdded</Type>

      <SequenceNumber>10000</SequenceNumber>

      <Assembly>Events.Web, Version=1.0.0.0, Culture=neutral, PublicKeyToken=747f099a9bd1475c</Assembly>

      <Class>Events.Web.EventListEventReceiver</Class>

      <Data></Data>

      <Filter></Filter>

    </Receiver>

  </Receivers>

</Elements>

Now create the receiver and override the ItemAdded method. Remember that the ItemAdded event is an asynchronous event, so you might not see your new site right away.

 

using System;

using System.Collections.Generic;

using System.Text;

using Microsoft.SharePoint;

using Microsoft.SharePoint.Meetings;

namespace MyNamespace

{

    public class EventListEventReceiver : SPItemEventReceiver

    {

        public override void ItemAdded(SPItemEventProperties properties)

        {

            CreateWorkSpace(properties);

            base.ItemAdded(properties);

        }

        private void CreateWorkSpace(SPItemEventProperties properties)

        {

            using (SPWeb web = properties.OpenWeb())

            {

                try

                {

                    //find the parent site

                    using (SPSite site = web.Site)

      {

                    // get a list of the custom templates so we can find our event template

                SPWebTemplateCollection templates = site.GetCustomWebTemplates(1033);

                       SPWebTemplate template = templates["EventWorkspaceTemplate.stp"];

                       // create the new web site

                       SPWeb newWeb = web.Webs.Add(properties.ListItemId.ToString(), properties.ListItem["Title"].ToString(), properties.ListItem["Location"].ToString(), 1033, template, false, false);

                       // cast the web as a meeting so we can link it back to the event item

                       SPMeeting meeting = SPMeeting.GetMeetingInformation(newWeb);

                       meeting.LinkWithEvent(web, properties.ListId.ToString(), properties.ListItemId, "WorkspaceLink", "Workspace");

      }

                }

                catch (Exception ex)

                {

                    properties.Cancel = true;

                    properties.ErrorMessage = ex.Message;

                }

            }

        }

    }

}

After installing the feature, be sure it is activated in the web site that your custom list exists.