增加一条记录到列表中并指定用哪个Content Type

http://blog.the-dargans.co.uk/2007/04/programmatically-adding-items-to.htmlhttp://asadewa.wordpress.com/2007/11/19/adding-a-custom-content-type-specific-item-on-a-sharepoint-list/

Short walk through:

1. Get a instance of the list you want to add the item to.
2. Add a new item to the list: SPListItem newItem = list.Items.Add();
3. To bind you new item to a content type you have to set the content type id for the new item:newItem["ContentTypeId"] = <Id of the content type>;.
4. Set the fields specified within your content type.
5. Commit your changes: newItem.Update();