Solved

Entity Framework 3 linq query

Posted on 2010-11-14
2
605 Views
Last Modified: 2013-11-11
Hi Experts,
Hi have to query the database in order to have a list of answers.
This is the situation:
I have 3 entities

PoolQuestion
Id (scalar property)
Text (scalar property)
IsEnabled (scalar property)
IsPublished (scalar property)
PollAnsers (navigation property)
PollResults (navigation property)

PollAnswer
Id (scalar property)
Text (scalar property)
Order (scalar property)
IsEnable (scalar property)
PollAnsers (navigation property)
PollResults (navigation property)

PollResult
Id (scalar property)
UserId (scalar property)
IsEnabled (scalar property)
PollAnswer (navigation property)
PollQuestion (navigation property)

When a user votes I add a new entry on PollResult.

Let's say the question is: Do you like icecream?
And the answers can be: Yes, No, Maybe

The PollResult as table on the db is:

Id,      PollQuestion_Id,      PollAnswer_Id,      UserId,     IsEnabled
-------------------------------------------------------------------------
1     |      2              |    6              |  1         | true
2     |      2              |    4              |  2         | true
3     |      2              |    4              |  3         | true

Open in new window


What I need is to get a result like

Question,                  Yes,         No,        Maybe
-----------------------------------------------------
Do you like Icecream?   |  10      |   3       |   0
Do you like devloping?  |  9       |   1       |   3

Open in new window


The relations are

PollQuestion 0.1 To many with PollResult,
PollQuestion 0.1 To many with PollAnswer,
PollAnswer 0.1 To many with PollResult

Basically I need for all the questions, aggregate and count all answers for a given question
I have to use Entity framework 3/c#

Any idea?

Thanks in advance
0
Comment
Question by:xtremereality
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 96

Expert Comment

by:Bob Learned
ID: 34136392
How much do you know about LINQ?  What have you tried?  Are you getting errors?
0
 
LVL 16

Accepted Solution

by:
Stephan earned 500 total points
ID: 34215707
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
Many of us here at EE write code. Many of us write exceptional code; just as many of us write exception-prone code. As we all should know, exceptions are a mechanism for handling errors which are typically out of our control. From database errors, t…
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question