Error "The LINQ expression node type 'ArrayIndex' is not supported in LINQ to Entities."

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I am trying to get some data using Linq to sql
But getting the error "The LINQ expression node type 'ArrayIndex' is not supported in LINQ to Entities."in code below.

C#

Tab[] items = db.Tabs.Where(c => c.PortalID == 32 && c.ParentID == 1983).ToArray<tab>();

But when I changed the where condition like below , the code is working.

C#

Tab[] items = db.Tabs.Where(c => c.PortalID == 32 ).ToArray<tab>();

There is no data in db for the first condition, but data is there for the second condition.
How can i check whether there is some data returning from db?

Posted 14-Sep-15 23:57pm

NeethuAneesh

Updated 15-Sep-15 0:08am

Herman<T>.Instance

v2

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DamithSL 15-Sep-15 6:33am

is this the exact code you get above exception? how you get ParentID value?

deepankarbhatnagar 15-Sep-15 8:45am

Please explain with proper code

George Swan 15-Sep-15 17:19pm

My guess is that Linq to Entities tries to convert the query into a SQL statement but this fails because of the ToArray() call. You need to return an enumerable and then convert that to an array. I suspect that the only reason that your second example appears to work is that there is no data to be returned.

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Maciej Los · Answer 1 · 2015-09-20T07:55:00

Solution 1

Based on this piece of code no one can help you. So, i'd strongly recommend to read these articles:
LINQ to Entities[^]
Known Issues and Considerations in LINQ to Entities[^]
Supported and Unsupported LINQ Methods (LINQ to Entities)[^]

Posted 20-Sep-15 7:55am

Maciej Los