Updating is not supported by data source sqldatasource1

01-Aug-2015 09:59 by 2 Comments

Updating is not supported by data source sqldatasource1 - events occurred in iran dating back to 2016 bce

The built-in functions @@Identity and Scope_Identity() are designed to retrieve the most recently added record's autoincrement identity value from Access and Sql Server respectively. The Jet 4.0 provider supports @@Identity, which means that developers no longer need to use Select Max(ID) or some other contrived method of obtaining new ID values.

Access doesn't support batch statements, so each must be run separately.It is also therefore possible, though not necessary, to create a new Command object to run the Select @@Identity query.The following code shows this in action where the Connection object is opened, then the first query is executed against cmd using Execute Non Query() to perfom the Insert, followed by changing the Command Text property of cmd to "Select @@Identity" and running that. Close() in all these examples: in all the snippets, the Connection object is instantiated within a 'using' block.At the end of the 'using' block, Dispose() is automatically called on objects created in the beginning of the block.If you do not employ 'using' blocks, make sure you explicitly call conn. There is no real performance difference between the methods.Close() as soon as you are done with the connection. My personal preference is for a stored procedure and Execute Scalar.

While Sql Server also supports @@Identity, the recommended method for obtaining identity values on this platform is Scope_Identity(), which retrieves the last identity value created in the current scope. It requires the least amount of code :) And finally, for those that like to use the Sql Data Source, here's how to use the Insert() method to retrieve Scope_Identity() from SQL Server. Text = "test"; } } @Neil At a guess, because you don't provide the error message details you get when the site "boms out", I would remove the ID value from the SQL query on the assumption that it might be an Autonumber column, and you should not enter values into it.'Scope' is a single module, which can be a stored procedure, batch, function or trigger. Sql Server supports batch statements which would have you append Select Scope_Identity() to the end of the Insert statement, optionally separating the two statements with a semicolon, and just using Execute Scalar() against the batch command to return the single value: Finally, you can create a stored procedure that contains no output parameter, but ends with 'Select Scope_Identity()'. The Sql Data Source control internally performs an Execute Non Query() when it is called on to perform an Insert, so by just appending SELECT SCOPE_IDENTITY() to the Insert Command and trying to retrieve the return value will not work. If that doesn't help, you should post a question to the net forums. I have never commented before on this sort of thing - but I am really delighted to have learnt about the sort of thing tonight with so little pain!!This version requires Execute Scalar(), and requires less ADO. This is because Execute Non Query() returns either the number of rows affected by an Update, Insert or Delete operation, or -1 for all other operations, which will overwrite any resultset produced from the appended Select statement. You won't have to wait days for me to get round to managing this site. I am using MS Access Database one of my important table is having Composite Primary Key. Thanks, But I have a problem when following the steps while using the Sql Data Source, it's that it works only once and when trying to add second record the .The way to work around this is to use a parameter value. When I used the Execute Scalar method, it is showing the wrong record number instead of currently inserted record auto number. Insert() method don't work and the the returned Identity value comes with help please ???This can be achieved declaratively using the following steps: To retrieve the value, we need to use the Sql Data Source. Back in Design view, bring up the properties of the Sql Data Source again, if they are not still showing, and click the lightning bolt to open up the events list. Hi Mike, your tutorial is still on top of Google results when searching for 'how to get back auto-incremented id'. One question: I prepare a tree structure of objects - records from a self-referring table - and then I want to commit all the records representing a new sub-tree to database in tree of already stored records (can be loaded partially).Double click the Inserted event, which will create an event handler in code-behind, and associate the Sql Data Source with the event handler. In memory the tree is implemented as a map where keys are ids and values contain reference to parent as its id, like:id = 1, {parent = 0, ...}id = 2, {parent = 1, ...}id = 3, {parent = 1, ...}id = 4, {parent = 2, ...}This is like the database table records and when a tree is loaded from database, actual ids are used. I do not want to store each new item in tree immediately (want to be able to cancel it before commit and never have it in db in such case).

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