问题
I have a SharePoint list with Content Approval enabled. The business requirement is that once the new list item is approved it should stay approved despite further updates by any user.
My first thought was to handle the ItemUpdating method, and if the corresponding before property is Approved then set the after property to Approved. This doesn't work however.
In the ItemUpdating method the "Approval Status" column does not show up in properties.BeforeProperties or properties.AfterProperties. properties.ListItem["Approval Status"] and properties.ListItem.ModerationInformation.Status both show the "before" value. In the ItemUpdated method the situation is the same, except instead the values shown are the "after" values.
Is there a way in either method to identify both the before and after methods? I can work around this by creating a new hidden column that I set when the item is approved but that doesn't seem best.
Should I be approaching this from a workflow perspective?
回答1:
Would this help?
http://www.synergyonline.com/blog/blog-moss/Lists/Posts/Post.aspx?ID=25
回答2:
Use field's internal name with AfterProperties or BeforeProperties. i.e. properties.AfterProperties["internal name"].
It works for me
回答3:
Please refer to the following properties in the AfterProperties section for a document library.
Document libraries are a bit different than lists. the doc libraries have .AfterProperties["vti_doclibmodstat"] and .AfterProperties["vti_doclibmodcomm"].
来源：https://stackoverflow.com/questions/1562126/sharepoint-checking-content-approval-change-status-in-event-receiver