Select distinct values with odata

问题:

I'm trying to create a call to odata webservice that would select only distinct values of some property. Is there any good example of how to do this?

回答1:

Currently the OData protocol doesn't support the distinct operator, or any other operator which would help with such query (assuming you're looking for disctinct values of a primitive property on some entity). You should be able to workaround this by implementing a service operation on the server which performs such query on the underlying provider which usually has that ability. And then the client can call that service operation instead.

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