May 2010
Intermediate to advanced
1272 pages
61h 18m
English
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Understanding Change Interceptors
Change interceptors are conceptually similar to query interceptors, but they differ in that they can intercept http requests of type POST, PUT, and DELETE (that is, CRUD operations via Uri). They are public methods returning no type; therefore, they are always Sub decorated with the ChangeInterceptor attribute pointing to the entity set name. Each interceptor receives two arguments: the data source (generally a single entity) and the System.Data.Services.UpdateOperations enumeration, which allows understanding what request was sent. Take a look at the following interceptor:
You decide how to handle the request ...
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