This post documents the "Manage Event Handlers" (MEH) project from Codeplex. The MEH tool allows you rapid deployment of event handlers. Additionally you can assign the handler to any Site, List, or Content Type. Note: this works for WSS 3.0 and MOSS 2007.
The .wsp file is located here:
http://www.codeplex.com/SPSCustomAdmin/Release/ProjectReleases.aspx?ReleaseId=3024
To install the MEH tool from command line:
stsadm -o addsolution -filename MOSS.CustomAdminPages.EventHandlers.Deploy.wsp
stsadm -o execadmsvcjobs
stsadm -o deploysolution -name MOSS.CustomAdminPages.EventHandlers.Deploy.wsp -local -force -allowGacDeployment -allowCasPolicies
stsadm -o execadmsvcjobs
stsadm -o activatefeature -name ManageEventHandlers -url http://foobar.com
stsadm -o execadmsvcjobs
Now you should see your MEH tool in the Site Setting Page:
Now build the event handler as you normally would and drop the compiled dll in the GAC.
After the assembly is in the GAC, you can now add it to your SharePoint site and assign it to a Site, List, or Content Type using the "Add" page of the MEH tool:
You can assign the same event handler to many different Site, Lists, or Content types. You need only click "Add" and set the properties!!
Awesome!
Show the AfterProperties snippet:
protected void showAfterProperties(SPItemEventProperties properties)
{
using (SPWeb web = properties.OpenWeb())
{
String strTemp = "";
/*get the current list*/
SPList list = web.Lists[properties.ListId];
string columnName = "";
foreach (SPField fld in list.Fields)
{
columnName = fld.InternalName;
if (properties.AfterProperties[columnName] != null)
strTemp += "\n" + columnName + ": " + properties.AfterProperties[columnName].ToString();
}
properties.ErrorMessage += strTemp;
properties.Cancel = true;
}
}
Additional Notes:
http://jpy-tech.com/post/2009/02/05/Sharepoint-Unique-Column-(PK)-Using-event-handler.aspx
http://www.sharepointblogs.com/toth/archive/2008/06/06/workarounds-for-itemadding-itemadded-event-handlers.aspx
http://www.iterasi.net/openviewer.aspx?sqrlitid=-lt435um10as0obb4eq48q