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I try query with linq but I get the following error:
The entity or complex type 'SELEXExpressCL.Data.TRUCK' cannot be constructed in a LINQ to Entities query.

TRUCK truck = (from item in context.TRUCKS
               where item.NUMBER == TruckNo
               select new TRUCK()
                   TRUCK_ID = item.TRUCK_ID,
                   NUMBER = item.NUMBER,
                   MAKE_TYPE = item.MAKE_TYPE,
                   MODEL = item.MODEL,
                   YEAR = item.YEAR,
                   VIN = item.VIN,
                   PLATE_NO = item.PLATE_NO,
                   COLOR = item.COLOR,
                   CODE = item.CODE,
                   MC_NUMBER = item.MC_NUMBER,
                   INVESTOR_ID = item.INVESTOR_ID,
                   IsAVAILABLE = item.IsAVAILABLE,
                   STATUS_ID = item.STATUS_ID


What I have tried:

I don't want to use the statement forech:

var query = from a in context.TRUCKS
                        where a.NUMBER == TruckNo
                        select a;

TRUCK TruckObj = new TRUCK();

foreach (var item in query)
    TruckObj.TRUCK_ID = item.TRUCK_ID;
    TruckObj.NUMBER = item.NUMBER;
    TruckObj.MAKE_TYPE = item.MAKE_TYPE;
    TruckObj.MODEL = item.MODEL;
    TruckObj.YEAR = item.YEAR;
    TruckObj.VIN = item.VIN;
    TruckObj.PLATE_NO = item.PLATE_NO;
    TruckObj.COLOR = item.COLOR;
    TruckObj.CODE = item.CODE;
    TruckObj.MC_NUMBER = item.MC_NUMBER;
    TruckObj.INVESTOR_ID = item.INVESTOR_ID;
    TruckObj.IsAVAILABLE = item.IsAVAILABLE;
    TruckObj.STATUS_ID = item.STATUS_ID;
Updated 26-Feb-18 23:37pm

1 solution

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Solution 1

You don't have to create a new TRUCK class, you already have the object you need in "item" so just select that

TRUCK truck = (from item in context.TRUCKS
               where item.NUMBER == TruckNo
               select item).Single();

BTW I googled the error message and this was the first result

c# - The entity cannot be constructed in a LINQ to Entities query - Stack Overflow[^]

It's much quicker for you to do basic research before asking a question as you can often find the answer yourself.

Also consider SingleOrDefault rather than Single in case there is an issue with your data.
phil.o 27-Feb-18 6:07am

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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