Linq to sql update stored procedure

I think you want to group tables based on whether they are related - that is the high order bit to optimize for. If you have a single database with tables that have associations between them, you probably want a single DC. If you have multiple databases then you'd want multiple DataContexts. A great explanation! I need to investigate this more in the weeks ahead and figure out how to enable this. You can have entities that have relationships with themselves for example: Employee that references its manager and reports.

One of the things I need to put together a sample of is one that shows how best to retrieve this hiearchical data without doing a separate query for each employee. Hi Scott: I have a problem : e. Hi Scott, you may have been asked this before, but can you use LINQ with Cubes, and if so, what kinds of things can you do?

Can you replace MDX? Is there a solution other than moving to the ObjectDataSource that isn't a hack? Any chance you could send me an email scottgu microsoft. If the object you are trying to edit is a Table on the DataContext, then I think you can handle this scenario by handling the Selecting event on the LinqDataSource.

Alternatively, the cleanest way might be to use the ObjecytDataSource. You can then check for this to detect whether the record exists or not. I haven't seen a specific benchmark on this yet. Hi Scott, Is it possible to provide an example of how LINQ would work with a query which returns multiple tables from joins.

As often data is a lot more than just a single table. OrderID Thanks. Scott, As always, great post as part of a great series. My question is about the timing of the data load. I assume then, that the same is the case for a sproc call, so you create an object that maps to the expression calling the sproc, and then when you evaluate that object through iteration or other inspection is when the sproc actually fires.

My question, then, assuming I'm correct so far, is what happens if that object you've assigned your sproc results to is used in another LINQ expression, e. Is that correct? I blogged a bit about my thoughts on it if that's the case, as well as my approach to the sproc vs.

Thanks, Paul. Sometimes, I'd like the code to execute on the database, but still would like to use LINQ to write the code. LINQ definitely supports joins across multiple tables. Great post! What are the plans for handling updates to the Result object returned from a SP where the Result is from an underlying join? Hi Scott, love this series.

The data objects created are not marked [Serializable], so binary formatting and thus use with SQL server session state is impossible on the objects this returns. Even if I manually change the generated cs file, the EntitySets are sealed and not serializable.

Is there a workaround or will they be fully binary-formattable in the release version? Until then, looks like we might have to just save to the non-session database? How can we change the connection string. Scott, this has been a great series. Just one thing seems to be missing. Doesn't that leave huge amounts of resources open if I've made many calls to my database? Now tell me, i see that you can drop a particular sp on a particular class in the designer, but what if someone drops a SP on to a wrong class, let's say someone drops the a CusOrderHistory on to the Order class instead of Product in the designer.

If an SP executes a dynamic query and returns rows from a table, can I explicitly map the result of the SP to an object? Thanks, Matt.

If you want them to be able to reference another existing object, you can add an association. In the case where you accidentally try and drop a sproc on the 'wrong' object, one that it cannot properly cast the results to, you'll get an error from the designer that the schemas don't match.

Sorry for offtopic question. I recently installed Beta2 and finally started playing with lambdas in VB. Please tell me why these same line of code comile to very different IL and return different results in VB and C. Can we be sure that this would be fixed before release? In Solution Explorer , right-click Form1.

In this task you set up an interface so that users can execute stored procedures to access data in the database. In the applications that you are developing with this walkthrough, users can access data in the database only by using the stored procedures embedded in the application. Click the AutoHide pushpin to keep the toolbox open while you perform the remaining steps in this section.

Arrange the controls as in the accompanying illustration. Expand Form1 so that the controls fit easily. In the same way, change the Text property for button1 to Order Details. Change the Text property for button2 to Order History. Double-click Order Details on Form1 to open the button1 event handler in the code editor.

Now double-click button2 on Form1 to open the button2 handler. Now it is time to test your application. Note that your contact with the datastore is limited to whatever actions the two stored procedures can take.

Those actions are to return the products included for any orderID you enter, or to return a history of products ordered for any CustomerID you enter.

If you have finished experimenting, you can click Close Project on the File menu, and save your project when you are prompted. You can enhance this project by making some changes. For example, you could list available stored procedures in a list box and have the user select which procedures to execute.

Privacy policy. They can also be used to override the default LINQ to SQL run-time behavior that performs Inserts, Updates, and Deletes when changes are saved from entity classes to a database for example, when calling the SubmitChanges method. If your stored procedure returns values that need to be sent back to the client for example, values calculated in the stored procedure , create output parameters in your stored procedures.

Database-generated values in other column types will unexpectedly result in a null value. Always , AutoSync. OnInsert , or AutoSync. When the default behavior is not desired, you can configure the update behavior by assigning specific stored procedures for performing the necessary inserts, updates, and deletes required to manipulate the data in your table.

You can also do this when the default behavior is not generated, for example, when your entity classes map to views. Finally, you can override the default update behavior when the database requires table access through stored procedures. Your computer might show different names or locations for some of the Visual Studio user interface elements in this article.

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