Search Results

Search found 39 results on 2 pages for 'defaultifempty'.

Page 1/2 | 1 2  | Next Page >

• Defaultifempty seems to work in linq to entities

  - by Rand

  I'm new to linq and linq to entities so I might have gone wrong in my assumptions, but I've been unknowingly trying to use DefaultIfEmpty in L2E. For some reason if I turn the resultset into a List, the Defaultifempty() works I don't know if I've inadvertantly crossed over into Linq area. The code below works, can anyone tell me why? And if it…

  Read the article

• DefaultIfEmpty doesn't work

  - by Freshblood

  Why is array still null after queried by DefaultIfEmpty ? class Program { static void Main(string[] args) { Program[] array = new Program[5]; Program[] query = array.DefaultIfEmpty(new Program()).ToArray(); foreach (var item in query) { …

  Read the article

• LINQ DefaultIfEmpty(), generating inferred argument error

  - by Refracted Paladin

  I am trying to get the below linq query to return -1 if there isn't any current value. I was looking at this article on MSDN, here, and it seemed that DefaultIfEmpty() was what I wanted. Unfortunately, I am getting a The type arguments cannot be inferred from the usage. Try specifying the type arguments explicitly.…

  Read the article

• Using DefaultIfEmpty in Linq - problem substituting a null value for a default value

  - by FiveTools

  I have questions that may or may not have a question_group if all the questions do not have a question_group and if I use default if empty like this: question_group defaultQuestion = new question_group {question_group_id = Guid.Empty}; questions.Select(x =>…

  Read the article

• Default if empty with LINQ to entities

  - by J. Pablo Fernández

  In a LINQ to entities expression like this: var vote = (from vote in db.Vote where vote.Voter.Id == user.Id select v).FirstOrDefault(); how do you you add a DefaultIfEmpty so that when there's no vote I'd get a default value?

  Read the article

• Linq, Left Join and Dates...

  - by BitFiddler

  So my situation is that I have a linq-to-sql model that does not allow dates to be null in one of my tables. This is intended, because the database does not allow nulls in that field. My problem, is that when I try to write a Linq query with this model, I…

  Read the article

• Fixing LINQ Error: Sequence contains no elements

  - by ChrisD

  I’ve read some posts regarding this error when using the First() or Single() command.   They suggest using FirstOrDefault() or SingleorDefault() instead. But I recently encountered it when using a Sum() command in conjunction with a Where(): …

  Read the article

• Linq Left Outer Join

  - by Neil

  I am new to LINQ and am trying to convert a SQL query to LINQ: SQL: left outer join PRODUCT_BEST_USE pbu on pbu.PRODUCT_GUID = @uProductId and pbu.BEST_USE_GUID = bu.BEST_USE_GUID LINQ: from PBU in PRODUCT_BEST_USE.Where(PBU=>PBU.PRODUCT_GUID…

  Read the article

• Joins in LINQ to SQL

  - by rajbk

  The following post shows how to write different types of joins in LINQ to SQL. I am using the Northwind database and LINQ to SQL for these examples. NorthwindDataContext dataContext = new NorthwindDataContext(); Inner Join var q1 = from c…

  Read the article

• Can't enumerate LinQ results with left join

  - by nvtthang

  var itemSet = from item in da.GetList<Models.account>() join file in objFileStorageList on item.account_id equals file.parent_id into objFile from fileItem in…

  Read the article

• Left outer join null using VB.NET and LINQ

  - by jvcoach23

  I've got what I think is a working left outer join LINQ query, but I'm having problems with the select because of null values in the right hand side of the join. Here is what I have so far Dim Os = From e In oExcel Group Join c In…

  Read the article

• Types in Union or Concat cannot be constructed with hierarchy

  - by user927777

  I am trying to run a query very similar to the following: (from bs in DataContext.TblBookShelf join b in DataContext.Book on bs.BookID equals b.BookID where bs.BookShelfID == bookShelfID select new BookItem { Categories =…

  Read the article

• Working with Joins in LINQ

  - by vik20000in

  While working with data most of the time we have to work with relation between different lists of data. Many a times we want to fetch data from both the list at once. This requires us to make different kind of joins between the…

  Read the article

• LINQ to SQL - Left Outer Join with multiple join conditions

  - by dan

  I have the following SQL which I am trying to translate to LINQ: SELECT f.value FROM period as p LEFT OUTER JOIN facts AS f ON p.id = f.periodid AND f.otherid = 17 WHERE p.companyid = 100 I have seen the typical…

  Read the article

• Is there an efficient way in LINQ to use a contains match if and only if there is no exact match?

  - by Peter

  I have an application where I am taking a large number of 'product names' input by a user and retrieving some information about each product. The problem is, the user may input a partial name or even a wrong name,…

  Read the article

• Left Join in Subsonic3

  - by muek

  Hi there, I'm new in subsonic3, and I'm getting some errors when I try to use LeftJoin var q = from c in categories join p in products on c equals p.Category into ps from p in…

  Read the article

• *Right* outer join in LINQ

  - by Rap

  Is it safe to say that there is no such thing as a right outer join in LINQ? I know to effectively create one, you'd just swap the tables in a left outer join. But can you apply the…

  Read the article

• Three level heirarchal data-linq

  - by user326010

  Hi I have three level heirarchal data. using the statement below i managed to display two level data. I need to extend it to one more level. Current heirachy is…

  Read the article

• Left outer join in LINQ is showing exception

  - by stackuser3

  The folloqing is the excpetion I am getting The null value cannot be assigned to a member with type System.Int32 which is a non-nullable value type. below is my…

  Read the article

• LINQ to SQL left outer joins

  - by César

  Is this query equivalent to a LEFT OUTER join? var rows = from a in query join s in context.ViewSiteinAdvise on a.Id equals s.SiteInAdviseId …

  Read the article

• ordering by a property on a joined table linq to sql

  - by Gazeth

  I have the following linq query from o in context.Opportunities join i in context.Interactions on o.OpportunityID equals i.OpportunityID into…

  Read the article

• Outer Join is not working in Linq Query: The method 'Join' cannot follow the method 'SelectMany' or is not supported

  - by Scorpion

  I am writing the Linq query as below: But on run its throwing the following error: The method 'Join' cannot follow the method 'SelectMany' or is not supported.…

  Read the article

• Left Join in Subsonic 3

  - by user303187

  I'm trying to do a left join in subsonic 3 using linq but it doesn't seem to work, I get a big error. var post = from p in Post.All() …

  Read the article

• LINQ, Left Join, Only Get where null in join table

  - by kmehta

  Hi. I am trying to do a left outer join on two tables, but I only want to return the results from the first table where the second table does not have a record…

  Read the article

• Linq To Sql Left outer join - filtering null results

  - by Harry

  I'd like to reproduce the following SQL into C# LinqToSql SELECT TOP(10) Keywords.* FROM Keywords LEFT OUTER JOIN IgnoreWords ON…

  Read the article

1 2  | Next Page >