Could not find an implementation of the query pattern

could not find an implementation of the query pattern for source type datatable
ef select not found
cs1936
linq query pattern
entity framework query
linq join

In my silverlight application I am trying to create a database connection using LINQ. First I add a new LINQ to SQL class, and drag my table called "tblPersoon" into it.

Then in my service file I try to execute the following query:

[OperationContract]
public tblPersoon GetPersoonByID(string id)
{
    var query = (from p in tblPersoon where p.id == id select p).Single();

But at tblPersoon it gives me the following error.

Could not find an implementation of the query pattern for source type 'SilverlightApplication1.Web.tblPersoon'. 'Where' not found.

And even when I try the following:

var query = (from p in tblPersoon select p).Single();

It gives me an error saying 'Select' not found!

Code for the generated class for my table can be found here: http://pastebin.com/edx3XRhi

What is causing this and how would I possibly solve this?

Thank you.

[Solved] Error Could not find an implementation of the query pattern , You need to 1) add a reference to the assembly "System.Core" (added to a new project created from a template in Visual Studio by default),  Could not find an implementation of the query pattern for source type 'System.Data.Entity.Database'. 'Select' not found. My relevent code is: DatabaseEntities db = new DatabaseEntities(); var whichUi = from UiType in db.Database select AdvancedUi; I am using the linq import (common answer on other threads).

You may need to add a using statement to the file. The default Silverlight class template doesn't include it:

using System.Linq;

Could not find an implementation of the query pattern for source type , In your query you select from context.db.Name , whereas you should select from context.db , otherwise select c.Name would mean context.db. Could not find an implementation of the query pattern for source type 'type'. 'method' not found. In order to query a source type, that type must implement the standard query operator methods that you are invoking in the query. The implementation can be either in the form of class members or extension methods

Could not find an implementation of the query pattern, Hi to all I geuss quite a few of you have seen this error "Could not find an implementation of the query pattern for source type 'void'. 'Select' not  Could not find an implementation of the query pattern for source type 'System.Data.Entity.DbSet'.'Select' not found. MyDbEntities is auto-generated by Entity Framework in a Database-First approach, context.Tables is a DbSet, so it should be able to use Linq, which has been added through the using directive.

I had a similar issue with generated strongly typed datasets, the full error message was:

Could not find an implementation of the query pattern for source type 'MyApp.InvcHeadDataTable'. 'Where' not found. Consider explicitly specifying the type of the range variable 'row'.

From my code:

        var x =
            from row in ds.InvcHead
            where row.Company == Session.CompanyID
            select row;

So I did as it suggested and explicitly specified the type:

        var x =
            from MyApp.InvcHeadRow row in ds.InvcHead
            where row.Company == Session.CompanyID
            select row;

Which worked a treat.

https://social.msdn.microsoft.com/Forums/en-US/4d1, fix error MVC - How to fix error - Could not find an implementation of the query pattern for Duration: 0:20 Posted: Jan 30, 2016 Home » c# » Could not find an implementation of the query pattern Could not find an implementation of the query pattern Posted by: admin December 8, 2017 Leave a comment

You are missing an equality:

var query = (from p in tblPersoon where p.id == 5 select p).Single();

where clause must result in a boolean.

OR you should not be using where at all:

var query = (from p in tblPersoon select p).Single();

MVC - How to fix error, Could not find an implementation of the query pattern for source type. hemant govekar. Loading Duration: 0:57 Posted: Feb 25, 2017 Could not find an implementation of the query pattern for source type 'System.Data.Entity.DbSet` 'Where' not found. Ask Question. Asked 5 years, 3 months ago. Active 5 years, 3 months ago. Viewed 7k times. 1. this solution has 4 layers.

Could not find an implementation of the query pattern for , When I write the Linq query I get the following message. Could not find an implementation of the query pattern for source type ETLTask.Queue'. List<int> lstIndexes = new List<int>(); IEnumerable<int> resault =(from index in lstIndexes where index == newIndex select index); but it has error: Could not find an implementation of the query pattern for source type 'System.Collections.Generic.List<int>'.

[RESOLVED] C# Entity Framework Could not find an implementation , Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Learn more CS1936 C# Could not find an implementation of the query pattern for source type 'Student'.

Could not find an implementation of the query pattern for source type, "Could not find an implementation of the query pattern for source type 'void'. 'Select' not found." Up untill a few hours ago I had not. Now its driving me around the bend. I have a class which i place all my sqlstuff, all quaries are via Tsql stored proc, accessing them via LinQ. I have about 100 of these quaries in this class.

Comments
  • My DataClasses1.Desinger.cs (code LINQ auto generates) does not include IEnumerable<T>. public System.Data.Linq.Table<tblPersoon> tblPersoons { get { return this.GetTable<tblPersoon>(); } } And when I use: var query = (from p in tblPersoon.Cast<Person>() select p).Single(); It gives me the following errors on .Cast. 'SilverlightApplication1.Web.tblPersoon' does not contain a definition for 'Cast'
  • @ThomasSchoof: could it be typo? Property is called tblPersoons (note the s at the end) while type is tblPersoon. You query type, instead of property on type.
  • If I try var query = (from p in tblPersoons select p).Single(); It tells me tblPersoons doesn't even excist.
  • I don't think LINQ to SQL was meant to update database (hence query in Language INtegrated Query), however you can find some help with those topics on LINQ to SQL MSDN page (Updating Without Querying section).
  • Adding using System.Linq did it for me.. :)
  • Thanks for the answer, but the using statement was already there.
  • Thanks for the answer... this corrected my issue !!! but... is there an additional explanation you can provide?
  • Awesome!! Thank you
  • Thank, I was indeed missing my equality, which was stupid of me. But I now I am getting the following error: Error 1 Could not find an implementation of the query pattern for source type 'SilverlightApplication1.Web.tblPersoon'. 'Where' not found.