private void DeleteEventReceiverHook(Guid guid, ISecurableObject eventContiner)
{
SPEventReceiverDefinitionCollection definitions = null;
if (typeof(SPWeb).IsAssignableFrom(eventContiner.GetType()))
{
SPWeb web = (SPWeb)eventContiner;
definitions = web.EventReceivers;
}
else if (typeof(SPList).IsAssignableFrom(eventContiner.GetType()))
{
SPList list = (SPList)eventContiner;
definitions = list.EventReceivers;
}
else
{
MessageBox.Show(this, "The current type is not supported.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
if (definitions != null)
{
foreach (SPEventReceiverDefinition definition in definitions)
{
if (guid == definition.Id)
{
string type = definition.Type.ToString();
string name = definition.Class;
definition.Delete();
MessageBox.Show(this, string.Format("The event hook [{0}] to class [{1}] was deleted.", type, name), "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
break;
}
}
}
}
public static void ProcessEventHookAction(Form parent, ISecurableObject obj, string typeName, Assembly selectedAssembly, Type selectedType, bool useNextSequenceNumber)
{
Type selectedObjectType = obj.GetType();
SPEventReceiverType eventType = (SPEventReceiverType)Enum.Parse(typeof(SPEventReceiverType), typeName);
int maxSequence = 9999;
SPEventReceiverDefinitionCollection definitions = null;
string parentName = string.Empty;
if (typeof(SPWeb).IsAssignableFrom(selectedObjectType))
{
SPWeb web = (SPWeb)obj;
parentName = web.Name;
definitions = web.EventReceivers;
}
else if (typeof(SPList).IsAssignableFrom(selectedObjectType))
{
SPList list = (SPList)obj;
parentName = list.Title;
definitions = list.EventReceivers;
}
else
{
throw new NotSupportedException("The selected object type is not supported.");
}
if (definitions != null)
{
bool cancel = false;
List <SPEventReceiverDefinition> pendingDelete = new List <SPEventReceiverDefinition>();
foreach (SPEventReceiverDefinition definition in definitions)
{
if ((definition.Type == eventType) && string.Equals(definition.Assembly, selectedAssembly.FullName) && string.Equals(definition.Class, selectedType.FullName))
{
if (MessageBox.Show(parent, string.Format("The selected event receiver has already been hooked to the [{0}] objects [{1}] event. Do you wish to overwrite the existing event hook?", parentName, eventType), "Event Already Hooked", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes)
{
pendingDelete.Add(definition);
}
else
{
cancel = true;
break;
}
}
if (definition.SequenceNumber > maxSequence)
{
maxSequence = definition.SequenceNumber;
}
}
foreach (SPEventReceiverDefinition definition in pendingDelete)
{
definition.Delete();
}
if (cancel)
{
return;
}
definitions.Add(eventType, selectedAssembly.FullName, selectedType.FullName);
if (useNextSequenceNumber)
{
foreach (SPEventReceiverDefinition definition in definitions)
{
if ((definition.Type == eventType) && string.Equals(definition.Assembly, selectedAssembly.FullName) && string.Equals(definition.Class, selectedType.FullName))
{
definition.SequenceNumber = (maxSequence + 1);
definition.Update();
break;
}
}
}
}
}