Using the Object Relational Designer If we have a Linq to SQL model (a .dbml file) opened in the designer, that shows the entities mapped to the database objects (tables, views), than we also have a pane for stored procedures and user defined functions (the right pane in the designer). The last element is ElementType which specifies the return type of the stored procedure, usually another type that is defined earlier in this mapping file
Fixing LINQ to SQL Issue: Stored Procedure Definition Returns int Instead of ResultSet
Overriding it to force it off will cause it to return data (which is likely just ignored), but it will be able to determine the proper format of the records returned. Parametrized stored proc compiles and executes on the runtime so dbml generation tool is not sure of the resulting IsingleResult object .To make this work just copy again your select statement at the end of the stored proc and execute it.Now try dragging storedproc from server explorer and it should work as usual
Method signature in dbml design...Read more Can LINQ to SQL and traditional Stored Procedures co-exist?First, to be clear, I am not talking about LINQ to SPRocs. Now it is a winform app...Read more LINQ to SQL, Stored Procedures and the Methods Pane (more like Methods PAIN!)I'm new to LINQ and am having a small issue
It is possible to configure the LINQDataSource to use stored procedures instead of the default LINQ to do the database interactions through the LINQ to SQL classes. With this knowledge, we will move forward and built a custom paging implementation using stored procedure with the LINQDataSource control, a practical usage of multiple resultset with LINQDataSource control
I crrently have the message stored as text, but if I copy the message from studio management to a notepad, it will be come one big line of text instead
KishoR NaiK: Linq - Multiple Result set of Procedure using LINQ to SQL
http://kishor-naik-dotnet.blogspot.com/2011/12/linq-multiple-result-set-of-procedure.htmlIt is possible to read multiple result set of procedure using Linq.In general scenario when you drag and drop procedure in .dbml its always returns ISingleResult and only consider first result, based of first result it will create data contracts
Fetching child records using Stored Procedures with LINQ to SQL
To do this, set up your fetch stored procs and make sure that they return the correct data type (not the standard custom generated type for stored procedures)
svenM: Linq To SQL Stored Procedure returns an Int
http://svenmaes.blogspot.com/2008/08/linq-to-sql-stored-procedure-returns.htmlAnd since the database was a sql 2000 db, using table variables was not possible.The solution turned out to be simple enough, replace the stored procedure with a dummy one that returns the fields your normal procedure will return (names and type).Then drop this stored procedure on the dbml file
No Return Type for a Stored Procedure in a Linq to SQL Data Layer - asp.net.object-datasource
Datawindows which use stored procedures to SELECT do return data when the application is run from the PowerBuilder development environment - but do not, when an executable is compiled and run. (Donald Knuth) That does...Sorting in gridView: Can I use LINQ to call a stored procedure and still get sorting like I can with an SQL Data source to a sproc? I have a gridView, it is populated by the results of a stored procedure
http://riteshkk2000.blogspot.com/2010/08/error-unknown-return-type-return-types.htmlQuick workaround if you are in a hurry...In SSMS, temporarily alter your stored proc by cutting out the majority of code so that you just have the final select in place. The SQL Server feature that attempts to derive the Meta data of the function reports no columns for the result shape, so the designer defaults to thinking it only has the single int return value
The only bad thing is that you must pass the context object to the method, but I suggest you to create some form of management of lifecycle of DataContext, in this way it is possible to recover the current DataContext from every part of the code. The first thing to notice is that the DataContext is able to do this, you can for example creates a stored called GetGoldCustomer on northwind database, having this stored accept an integer parameter called @ordercount, and returns all field from customer for customer that had more than @ordercount orders
LINQ to SQL also provides the feature to handle the multiple result shapes returned by the stored procedures where it is unknown that what type of result set the stored procedure will return
Reader Level: Article Using Stored Procedure in LINQ By Dhananjay Kumar on Jan 04, 2011 LINQ, Stored Procedure, Stored Procedure in LINQ, Using Stored Procedure, We have a strored procedure as below
Linq to SQL - adding a stored procedure for select
- 2014 EE Annual Survey EXPERT WHO ANSWERED Fernando Soto Fernando Soto has answered 3,989 questions on Experts Exchange and is an expert in Linux Distributions, .NET Programming and Visual Basic.NET. As you read, please keep in mind this is not regarding the storing of the JSON object as a CLOB, but rather the using of each key as a column name and the root element as the table name for import
here only condition should be satisfied that Our Custom Entity class should contain all the field with compatible .NET Data types which will return the data. Here Linq-To-SQL Provides a property called ReturnType If you select function which we have created via dragging a stored procedure in data context class
After mapping the procedure to the product entity class by drag and drop method onto the designer, it will auto-generate a function in the designer class with the name same as of the stored procedure i.e
Linq to Sql - Using Stored Procedures
The example below calls the stored procedure CustOrdersHist in the Northwind database and returns a datatable, as the stored procedure returns a single resultset. There are two type of Stored Procedure Calls you can map in the LLBLGen Pro project: action stored procedures (calling a procedure, passing in parameters, no result set returned), and retrieval stored procedures (calling a procedure, passing in parameters, resultset is returned)
ADO.NET :: Return Type Of Linq To SQL Stored Procedures?
I have attempted converting the service results to IQuery, List, and Array, however, I still have the problem with the first record being repeated 4 times. View 15 Replies View Related SQL Stored Procedures Failing To Return Values? Sep 7, 2010 I am working on a Tag system for a news page designed in ASP.NET
vinaykumarnama 11 Nov 2009 7:01 AM Thanks a lot ur brilliant iam trying this from 2 days Mike 3 Dec 2009 1:31 AM Bru, why can't the other blogs get to the point like you do...and effectively! Thanks. jason palmer 4 Jan 2010 6:05 AM like the using thing, did not 'get it' to start but now realise what it does, makes things easier to read too ! Kevin 16 Mar 2010 1:46 AM How do use resolve this: Cannot implicitly convert 'int?' to 'string' Seriously now Kevin 6 Apr 2010 12:08 AM Thanks for this post! So many other posts online sending me off 10 different directions, your solution was simple and direct, awesome
KishoR NaiK: LINQ - Custom Entity Class in Linq To SQL
http://kishor-naik-dotnet.blogspot.com/2013/11/linq-custom-entity-class-in-linq-to-sql.htmlYou can change the return type of a DataContext method after you add it to the methods pane.change the return type of a DataContext method, select it and click the Return Type property in the Properties window
This is true, you could do this, but as complexity increases, you quickly have to look to other alternatives or your LINQ will increase in complexity and create more room for error. The old .NET 2.0 datareader offered a means to easily do this while allowing you the flexibility to do additional work within the reader loop so I sought to reproduce this
Have you debugged your L2S code by attaching to the Log property of the data context? This will show you all the SQL that is emitted from L2S while it's running and you can run it directly against SQL. That means that I'd have to change my stored procedure to alias my scalar data like this: 1: SELECT FirstName as Value Although this is a downside, I believe it's well worth it in order to realize all the other benefits of quick implementation and avoiding duplicate and unnecessary code
Six simple steps to use a Stored Procedure in LINQ - CodeProject
Download source code - 1.06 MB Table of contents Introduction LINQ basics Step 1: Create a Stored Procedure Step 2: Create a LINQ Entity Step 3: Inherit from the DataContext class Step 4: Attribute using Function attribute Step 5: Invoke the ExecuteMethod call Step 6: Finally we call the data context in the client Introduction This is an extremely small article which describes how to flourish LINQ objects using a Stored Procedure. As this is a protected function, it changes the way you architect the DAL using the DataContext class and probably you would like to tweak and consider some options here
We can also map the result of the function back to any entity type or complex type.The following is the procedure to import and use a Stored Procedure in Entity Framework.Step 1: Import Stored Procedure When we finish this process, the selected Stored Procedure is added to the model browser under the Stored Procedure Node.Step 2: Right-click Stored Procedure and select "Add Function Import".Step 3: Here, we can map a returned object of our Stored Procedure
Then type the name again in the Function Import Name text box (to create the method wrapper) and choose the entity return type in the Entities drop-down list and press OK. While the Entity Framework does have mapping support to specify stored procedures and functions that return scalars, automatic code-generation of methods that will allow you to use the mapping is currently missing
stored procedure return type LINQ to SQL
Since the controllers are called directly by the MVC framework and as soon as you start introduce Repository Pattern in your project , unity framework will be very handy create dependent objects in your MVC Controller or Web API Controller. For me, I am relatively new to WIF, I have followed online tutorials and SDK samples to the T, nothing frustrates me more however than when a step in a tutorial does not work as intended
Even if you alter the procedure to actually return something, delete it from the DBML, and add it again, it still think it's the first version wich didn't have a return type. Today I was going to contiune to create the rest of the SP's i needed with a return type but today when I drag my Store Procedures to my Methods Pane, I couldn't access the Return Type property..
Zeeshan Hirani - Using Stored Procedures In Linq
Notice that after calling our stored procedure in a Linq query we are further filtering the result by getting only customers with contact title of Sales Representative. If the stored procedure does not return any particular entity, dragging the stored procedure on the designer would generate a class on the fly which would contain properties that match the columns your stored procedure is returning
In an effort to improve their coding efficiency in a large SQL project, the authors wrote a set of design-time stored procedures that generate run-time stored procedures, and have used them in project after project ever since. This process can be made easier and more flexible by using SQL Server stored procedures to automate the delivery of data in XML format from the database to the front-end components
LINQ to SQL - Mapping Stored Procedure with Multiple Results - CodeProject
If your DAL classes are setup correctly with navigation properties, you could actually return a known type back without creating an idea of mixed types
The ability to define data model classes that can be independent of the underlying database schema gives you much more agility as you build your application (since you can change the underlying column names without having to update your code). I was wondering if you had thought of providing selections of your blogs as PDF docs for download, so that we could have, for example, this LINQ series of posts all together in one place in chronological order
asp.net mvc - How can I map stored procedure result into a custom class with linq-to-sql? - Stack Overflow
I admit to being a little out of my depth when it comes to updating those files directly and I am not sure it is best practice? Would be good to get some diretion. in each of the properties' properties, you need to set the type (the .net type), and the Server data type (varchar(100), int) and the source (the name of the field returned by the sproc.) once that's done, drag the sproc from server explorer onto that class, and the method for the sproc will return a result as a collection of that type
If your stored procedure's return type is still 'int' in your DBML code, comment the entire code of stored procedure, create a new SELECT statement whose returning fields types and names match the original's SELECT statement and get DBML regenerate the code again. But with another (nearly identical) stored procedure, I can change the return type just fine (from "Auto Generated Type" to what I want.) I've run into this problem on two separate machines
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