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LINQ QUESTIONS

Beginners Guide to LINQ
Beginners Guide to LINQ
I hope this helps you . LINQ stands for Language Integrated Query and is a set of extensions for .NET that allow you to query data the same way from code and isn't tied to a specific data source. You can use the same LINQ code for SQL Server, XML, ob
TAG : linq
Date : January 25 2021, 03:26 PM , By : user109127
WCF Data Services - neither .Expand or .LoadProperty seems to do what I need
WCF Data Services - neither .Expand or .LoadProperty seems to do what I need
I wish this helpful for you I am building a school management app where they track student tardiness and absences. I've got three entities to help me in this. A Students entity (first name, last name, ID, etc.); a SystemAbsenceTypes entity with Syste
TAG : linq
Date : January 10 2021, 01:47 PM , By : Kocur
How to apply global filter on Entity Framework?
How to apply global filter on Entity Framework?
this one helps. Although a late response, I will put it here so it can help others. You can also set a condition for your entity in your edmx file. Select your entity and Goto Mapping Details and create a new condition.
TAG : linq
Date : January 10 2021, 01:47 PM , By : BinaryBoy
LINQ to identify a row that is the first in consecutive occurrences that meet criteria
LINQ to identify a row that is the first in consecutive occurrences that meet criteria
wish helps you Let's say this table stores the high temperature for each day , You can simply get the latest item after TakeWhile:
TAG : linq
Date : January 02 2021, 06:48 AM , By : user93312
Extend linq-to-sql partial class to avoid writing a property?
Extend linq-to-sql partial class to avoid writing a property?
I hope this helps you . It is possible. You can add your properties and methods to linq generated class using partial class mechanism. Linq generated classes are marked partial so you can add class members with:
TAG : linq
Date : January 02 2021, 06:48 AM , By : Juan Pablo
JSINQ (Linq for JavaScript library) sub-queries (how-to)
JSINQ (Linq for JavaScript library) sub-queries (how-to)
I hope this helps . I also started with jslinq when looking for a LINQ-JavaScript library. However I decided to switch to linq.js which I found to be closer to .NET style LINQ.http://linqjs.codeplex.com
TAG : linq
Date : January 02 2021, 06:48 AM , By : Harvey
What's the convention for extending Linq datacontext with set based helper operations specific to one collection of enti
What's the convention for extending Linq datacontext with set based helper operations specific to one collection of enti
this will help I might be vaguing out here but I'm looking for a nice place to put set based helper operations in linq so I can do things like;
TAG : linq
Date : January 02 2021, 06:48 AM , By : user177910
what is the difference between LINQ and ADO.net
what is the difference between LINQ and ADO.net
it should still fix some issue Linq is a language feature (Language INtegrated Query) that allows for querying of objects. It is often conflated with Linq to Sql, which is a series of extension methods and other code that allows querying of a Sql Ser
TAG : linq
Date : January 02 2021, 06:48 AM , By : CrookedNumber
Linq To SQL - Specified cast is not valid - SingleOrDefault()
Linq To SQL - Specified cast is not valid - SingleOrDefault()
I wish this help you You need to ensure that your table schema matches your .dbml diagram and associated properties.Perhaps the easiest way to do this is to delete the table in question from your dbml diagram. Then, from your server explorer, drag it
TAG : linq
Date : January 02 2021, 06:48 AM , By : cashshadow
NHibernate Linq - Duplicate Records
NHibernate Linq - Duplicate Records
wish helps you I am having a problem with duplicate blog post coming back when i run the linq statement below. , try
TAG : linq
Date : January 02 2021, 06:48 AM , By : Rit Li
Select and select many difference
Select and select many difference
help you fix your problem I have read many sites/threads on select and select many in LINQ but still don't quite understand. , Here's a sample. Hope it clarifies everything:
TAG : linq
Date : January 02 2021, 06:48 AM , By : Kilimanjaro
"Operation is not valid due to the current state of the object." Exception, when I want to retrieve Items
"Operation is not valid due to the current state of the object." Exception, when I want to retrieve Items
should help you out I solved my problem using First loading entities and then using Linq to Objects, Like this:
TAG : linq
Date : December 27 2020, 03:55 PM , By : PaulPlum
Linq query results in the same references when initializing a variable
Linq query results in the same references when initializing a variable
wish help you to fix your issue It turns out that EF initializes new instances for each entity if in the initialization "something" is done with a property of the queried entity.For example, if Category was a class having a FavoriteID property, (and
TAG : linq
Date : December 26 2020, 12:01 AM , By : Anand
Linq Error A second operation started on this context before a previous operation completed
Linq Error A second operation started on this context before a previous operation completed
like below fixes the issue There is more than one suggestion to be made, but to keep things simple as a quick fix to your problem, you can simply change where you are retrieving the data using the ToList() against the context.
TAG : linq
Date : December 25 2020, 04:30 PM , By : browe
Sum "Amount" from one table and display in Another Table
Sum "Amount" from one table and display in Another Table
hope this fix your issue i have two tables named: , for specific PatientBill
TAG : linq
Date : December 25 2020, 06:47 AM , By : Nick Pegg
Making the LINQ projection generic
Making the LINQ projection generic
I hope this helps . I have a LINQ which access a table with a large data set, so this query is performance critical. I also want the filtered dataset to be sorted dynamically, so I'm using a LINQ extension to do the sorting by passing the sort column
TAG : linq
Date : December 24 2020, 10:01 PM , By : Sebastian Gift
How to search in umbraco 8.1 using custom property in where clause
How to search in umbraco 8.1 using custom property in where clause
I wish did fix the issue. var a = Nodes.Children.Where("CustomProperty == @0", "Value").First(); , You need to use strongly typed models - e.g.:
TAG : linq
Date : December 23 2020, 09:30 PM , By : Joshua Johnson
Select distinct from property which is List<string>
Select distinct from property which is List<string>
will be helpful for those in need You was close. You need to use Enumerable.SelectMany to select all tags and flatten them into one sequence:
TAG : linq
Date : November 22 2020, 12:01 PM , By : Blaise Roth
how to format a decimal value in linq
how to format a decimal value in linq
it helps some times , Try like this
TAG : linq
Date : November 22 2020, 11:05 AM , By : Paul McKee
Linq query for children class by Entity framework
Linq query for children class by Entity framework
seems to work fine Use the Include method to get the collection of Customers and then use the SelectMany method to project all the CustomerSelectedCovers within all the customers of the given employee , consider the below sample code that simulates y
TAG : linq
Date : November 19 2020, 01:01 AM , By : kiirpi
How exactly does InsertAllOnSubmit works in Linq
How exactly does InsertAllOnSubmit works in Linq
I think the issue was by ths following , I have no idea why it doesn't compile, according to the discussion under your question you possibly paste some other code, however this should definitely work:
TAG : linq
Date : November 14 2020, 04:48 PM , By : Nosayaba
Select distinct data on query
Select distinct data on query
will help you I've been stuck on my query on select a distinct data.. , You can try with following LINQ :
TAG : linq
Date : November 08 2020, 03:01 PM , By : Chris Woods
How to Convert a LINQ Query Syntax to a Method Syntax? (with join and multiple selects) Issue: Where-no overloads for +
How to Convert a LINQ Query Syntax to a Method Syntax? (with join and multiple selects) Issue: Where-no overloads for +
Hope that helps , Please try following.
TAG : linq
Date : October 28 2020, 07:40 AM , By : Brazen
When using LINQ shall we use 3 layers?
When using LINQ shall we use 3 layers?
it fixes the issue Do what works for you. Building a wedding website with a handful of links and getting 5 content pages out of the database? More than 1 layer seems like tremendous overkill. On the flip side, for a very complex or large project: I t
TAG : linq
Date : October 19 2020, 11:12 PM , By : lewing
LINQ support in Enterprise Library Data Access Application Block
LINQ support in Enterprise Library Data Access Application Block
I wish this help you I guess the answer is outdated, 5.0 version has support for linq. The following scenarios are supported: Using a DataReader to retrieve multiple rows of data Using a DataSet to retrieve multiple rows of data Executing a command a
TAG : linq
Date : October 17 2020, 11:12 PM , By : baumichel
LINQ from SortedList C#
LINQ from SortedList C#
this one helps. Original SortedList class is part of Collection. Generics introduces SortedList but if you have old code, then it wont be using that.The easiest is to use the Cast method or OfType extension method that is made available for SortedLis
TAG : linq
Date : October 17 2020, 11:12 PM , By : scott.sizemore
Mux & Demux w/ LINQ
Mux & Demux w/ LINQ
help you fix your problem Assuming that you want (0, 1, 2, 3) to end up as (0, 2) and (1, 3) when demuxing to two streams, you basically can't do it without buffering. You could buffer only when necessary, but that would be difficult. Basically you n
TAG : linq
Date : October 15 2020, 01:19 AM , By : kaart
How to Filter out null rows from DataTable with linq?
How to Filter out null rows from DataTable with linq?
I wish this help you I have a Datable that I have built from excel data, but sometimes excel returns rows in which all the fields are null. , Like this:
TAG : linq
Date : October 14 2020, 11:12 PM , By : negonicrac
Linq find differences in two lists
Linq find differences in two lists
wish of those help Your question is not completely specified but I assume that you are looking for the differences as sets (that is, ordering does not matter). If so, you want the symmetric difference of the two sets. You can achieve this using Enume
TAG : linq
Date : October 14 2020, 01:11 PM , By : chad
Custom LINQ implementations
Custom LINQ implementations
will be helpful for those in need Have a look at this tutorial
TAG : linq
Date : October 14 2020, 12:44 PM , By : GunnarHafdal
LINQ Query Variable passed to Another LINQ Query
LINQ Query Variable passed to Another LINQ Query
I hope this helps you . What is the difference between the query in this post: Save LINQ Query As Variable To Call Another LINQ Query , The two samples are fundamentally different.First Sample
TAG : linq
Date : October 14 2020, 09:27 AM , By : kraszie
LINQ restore order post-parallel-processing
LINQ restore order post-parallel-processing
I wish did fix the issue. You could use something like this to create a collection of items that contains the original values and their original sequence:
TAG : linq
Date : October 06 2020, 01:00 PM , By : Sandip
Include vs. ThenInclude for grandchild properties in EF Core
Include vs. ThenInclude for grandchild properties in EF Core
To fix the issue you can do They are equivalent. The first one is obviously preferred, but it's not possible with collection navigations. Hence, ThenInclude().
TAG : linq
Date : September 29 2020, 06:00 PM , By : unadopted
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