Language INtegrated Query (LINQ) is a Microsoft .NET Framework component that adds native data querying capabilities to .NET languages.
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IdentifierReferenceResolver: resolving at project level
One of the most important parts at the core of rubberduck is the IdentifierReferenceResolver class, which is responsible for resolving each declaration as the parse ...
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1answer
52 views
Deserializing multiple elements from XElement [on hold]
I'm serializing multiple elements using this code:
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3
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1answer
58 views
Using LINQ to perform a LEFT OUTER JOIN in 2 DataTables (Multiples criteria)
I know that exists a lot of solutions about how to create an OUTER JOIN between two DataTables.
I created the following code in ...
3
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1answer
44 views
Grouping two sets of data
The following method retrieves a list of users and the subscriptions for each user, from my database. That said, it works, but it runs pretty dang slow. I'd like to improve the speed on it. Currently, ...
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1answer
62 views
Getting prime numbers between a range
I have the following code to get the prime numbers between a range of numbers. Is this the best and fastest method?
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1answer
30 views
Retrieving a list, by iterating through a list
I'm using VB.Net, MVC 5, EF 6, and Linq. I have a list of Integers (category attribute IDs). I need to create a second list of ...
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1answer
81 views
Sum data that needs to be joined and grouped by
I have a list of patients, Patient class has Prescriptions property, which is a list of ...
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2answers
51 views
Convert an object to an ordered by SemVer Markdown list
For a small personal project, I am looking to convert an object to an ordered by SemVer Markdown list. You can find the original code for the sort logic here and here for the writing into Markdown ...
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1answer
56 views
Which way is better (matching Onion Architecture in MVC pattern) for using Provider?
In onion arch. we have multi layer structre:
UI (User interface).
BL (Business Logic / Services).
RE (Repositories).
UI uses BL to get data from RE with some conditions, my question is which is ...
2
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1answer
69 views
LINQ filtering query
I often find myself writing LINQ queries like this. I end up testing for Null and zero-counts pretty often, and the code sprawls out to be something like the ...
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3answers
138 views
Filtering units by a dynamic Lambda expression
I have a simple if statement which, based on user input, determines which expression is going to be utilized. It looks like it can be done better.
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5
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3answers
685 views
Convert Foreach Loop into Linq in C#
I want to convert these loops into simple loop. I want the code to look neat and short. I saw answers related to LINQ but couldn't make out from that. Are there any other possible ways for this ...
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0answers
54 views
Create JSON object from self-nested LINQ query
I created this function to created nested JSON object using a Linq query. How can I optimize this and make it more readable?
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10
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3answers
106 views
FizzBuzz in accordance with standards
I wrote FizzBuzz. My aim is to use C# Code Standards correctly, and write flexible code. How can I improve my solution according to code standards? How can it be better in general?
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3
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1answer
82 views
Storing user settings using LINQ to XML
I want to store some user settings into a file, so that the users get the same experience on all machines they're working on. The built-in user.config turned out to ...
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2answers
104 views
Commission calculation
I am trying to improve the performance of the current solution for calculating commission in a betting platform.
The following is the code currently used to solve the problem. The primary problem ...
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1answer
123 views
Performance comparision of SQL queries versus LINQ in Visual Studio 2012
I am new to VS 2012 and need to use it with SQL Server. I need to get data from a table in SQL Server 2012 with 500 rows and 15 columns and process the data in it and update another table. All this ...
2
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1answer
63 views
LINQ queries to fetch first and last name
I have these two queries and they work just fine. I use the values they retrieve to populate a title for a view in my application. It seems though that I should be able to accomplish this with one ...
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1answer
109 views
Inserting customer care database analysis detail records
I have written this linq-to-sql query to insert a bunch of customer care database analysis detail records:
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4
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3answers
223 views
Return IEnumerable<KeyValuePair> from a private method; use Dictionary or anon. type?
Is it okay to return IEnumerable<KeyValuePair<string, string>> from a private method instead of returning a read-only dictionary? This allows for ...
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1answer
61 views
Optimize LINQ search with custom fixed ranking
I have to perform on some collection and return ranking based on some logic
I wish to optimize this working code since I think it can be bettered (maybe using tasks?).
I need to search on ...
4
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1answer
95 views
Finding out which user has made the most progress
I have some code to accomplish the objective of finding out which user has made the most progress. Progress is measured in integer values, the higher the better. ...
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1answer
72 views
Get list of unique parents from childrens list
Parent has list of Children. I only have access to the list of children. I need to get list of unique parents from the List of ...
2
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2answers
59 views
Grab set of data from database that matches userid and return it to the view
I want to get the row of data that matches the user ID I have. Then I want to return that view to my view to be displayed in my textboxes for editing.
Here's the action that gets called when a get ...
3
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2answers
85 views
Linq to entities query for donor registrations [closed]
I'm using Linq-to-Entities for querying, and MVC.NET and C# for coding. I'm trying to generate monthly donor registry report which needs donor count, donors who signed through web,donors who ...
4
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2answers
130 views
Wordy LINQ for XML word list
This code works as intended, however, I am sure that there is a way to condense the xmldataLoad method. If someone could maybe explain a better approach than what I ...
6
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1answer
87 views
Shuffling an arbitrary list or sequence
After reading this question I wanted to write a short example of how a list or sequence could be shuffled in .net. The result turned out to not be very short:
Program.cs
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7answers
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Imposing a sort order on a query
I've always been told "never use goto, there's always a better way" and for the longest time I just accepted it. Lately though, I've been running into such scenarios in which I have to repeat this bit ...
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2answers
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LINQ query that filters elements from a list of object
I have two lists of objects Person and PersonResult. Both are linked through the property ...
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2answers
176 views
Ordering filtered results
I have the following method which under code review gives me a CA1502 avoid excessive complexity error (although if I suppress the message it will build fine):
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0answers
197 views
Populating Charts with Chart.js
I have a dashboard page which populates some charts. They execute a Linq query to then transform the data into Json to populate the Chart.
These charts maybe used throughout the site, so I am ...
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2answers
166 views
Two functions to impose order on queries
I am writing a c# program to build generic sort algorithm on a request to a collection of data. The data needs to be sorted based on the supplied columns.I am using Entity framework and Expression ...
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2answers
89 views
Linq refactoring
I have some code that asynchronously load some point in chart when user drag it.
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2answers
117 views
Checking for user permissions
The idea here is we have Roles, Permissions, and a table called PermissionRoles that connect the two. So a Permissions can be in many Roles, and many Permissions can have the same Role. So what the ...
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0answers
507 views
Retrieving Primary Key from Entity Framework entity
Entity Framework (version 6) generates classes based on your tables that look like this (where each property represents a field in the table):
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0answers
38 views
Query against history table
I have this linq query that queries a table that retains any change history done to any of the tables is constructed like this:
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1answer
72 views
Extracting properties from stories
I have a list of items, and a list of actions that extract data from those items. I iterate over the list of items and create a Dictionary for each item that has the data extracted from the item.
I ...
2
votes
1answer
58 views
Convert two collections of different objects into a single collection
I am combining two lists of separate objects into a single combined list. The below code works perfectly but it is not the most elegant or efficient solution. Is there a better solution?
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3
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2answers
247 views
Permutations in C#
I have a program that will get all possible permutations of a certain equation:
A + 13 * B / C + D + 12 * E - F - 11 + G * H / I - 10 == 66
Where A, B....I is a value 1-9, and where each digit ...
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1answer
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1answer
56 views
Repetitive code for a projected field in a lambda
I have a simple projection in my code. Taking away the majority of the fields which are not of interest, it looks like the following:
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3answers
132 views
Property Mapping with Reflection efficiency
I have an object that I am populating via mapping and lookup with Reflection:
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11
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2answers
2k views
2
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1answer
62 views
Query the context or resulting list
I was just getting some products using entity framework and was wondering which would be better to do when getting the results, or if there is no difference.
Option 1 - Query the context directly
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2answers
367 views
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1answer
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LINQ to Entities query of tests for my classes, with many subqueries
This MVC4 controller method, which uses EF6, is taking a long time to run (over 2 seconds). I've added verbose comments for the purpose of this post only.
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1answer
124 views
Inserting employee records
There is nothing wrong, but is there any other nice way to re-write this program?
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1answer
140 views
Code Inspection: Procedure not used
Here is yet another piece of Rubberduck code, this time the nasty ProcedureNotUsedInspection class, whose role is to identify all procedures that are never called ...
2
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1answer
51 views
Extract incomplete weeks from a DateTime collection
The code below attempts to extract incomplete weeks from a List<DateTime>.
For example, a list containing all the days in Jan 2015 would result in the 5th to ...
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1answer
131 views
Longest palindrome in a given string using LINQ
Problem:I need to write an algorithm that will return length of longest possible palindrome from a given string.
So if the input is aabbbccdfg
Program output should be 7. //-->[cabbbac]
Can someone ...
