Access batch update

The code used in BatchUpdate is similar to that used in the BLL s UpdateProduct methods, the main difference being that in the UpdateProduct methods only a single ProductRow instance is retrieved from the architecture.

The code that assigns the properties of the ProductRow is the same between the UpdateProducts methods and the code within the For Each loop in BatchUpdate , as is the overall pattern. To complete this tutorial, we need to have the BatchUpdate method invoked when either of the Update Products buttons is clicked. Create event handlers for the Click events of these two Button controls and add the following code in the event handlers:.

First a call is made to BatchUpdate. Next, the ClientScript property is used to inject JavaScript that will display a messagebox that reads The products have been updated. Take a minute to test out this code. Visit BatchUpdate. Assuming there are no input validation errors, you should see a messagebox that reads The products have been updated.

Then from BatchUpdate. This should result in an error when clicking Update Products with the other changes during that batch operation rolled back to their original values. The BatchUpdate method we just examined retrieves all of the products from the BLL s GetProducts method and then updates just those records that appear in the GridView. This approach is ideal if the GridView does not use paging, but if it does, there may be hundreds, thousands, or tens of thousands of products, but only ten rows in the GridView.

In such a case, getting all of the products from the database only to modify 10 of them is less than ideal. For those types of situations, consider using the following BatchUpdateAlternate method instead:.

Since each of the ProductsRow instances have been added to the products instead of updated , if we blindly pass it to the UpdateWithTransaction method the ProductsTableAdapter will try to insert each of the records into the database. Instead, we need to specify that each of these rows has been modified not added. The GridView provides built-in per-row editing capabilities, but lacks support for creating fully editable interfaces.

As we saw in this tutorial, such interfaces are possible, but require a bit of work. To create a GridView where every row is editable, we need to convert the GridView s fields into TemplateFields and define the editing interface within the ItemTemplate s.

In the next tutorial we'll see how to create an interface for batch deleting. In particular, each GridView row will include a checkbox and instead of Update All -type buttons, we'll have Delete Selected Rows buttons. Scott works as an independent consultant, trainer, and writer. NET 2. He can be reached at mitchell 4GuysFromRolla. This tutorial series was reviewed by many helpful reviewers. Lead reviewers for this tutorial were Teresa Murphy and David Suru. Interested in reviewing my upcoming MSDN articles?

If so, drop me a line at mitchell 4GuysFromRolla. Previous Next. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback? Note The Customizing the Data Modification Interface tutorial contains a more thorough and complete discussion on customizing a template to include a DropDownList as opposed to a TextBox.

Note There is a potential performance and scalability issue here that is worth mentioning. Note When binding the data source to the GridView through its smart tag, Visual Studio automatically assigns the data source s primary key value s to the GridView s DataKeyNames property. Although this solution uses the CommandBuilder to generate the updating logic for the DataAdapter , the solution remains fundamentally the same if you use your own custom updating logic.

One thing to keep in mind: the solution code iterates in reverse order through the parameters collection so that parameters are replaced correctly if there are more than nine parameters; if they were processed in forward order, parameter p1 would cause the replacement for parameter p10 , p11 , and so on.

When using custom updating logic, consider the potential problems that might occur if one parameter name is the start of another parameter name when replacing the parameters with the values in the DataRow. Ensure that you set the AutoIncrementSeed and AutoIncrementStep properties prior to filling the DataSet ; otherwise, the seed will be incorrect starting at one less than the largest AutoIncrement field value retrieved from the database.

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Delegates A. Enumerations show all menu. Authors: Bill Hamilton. Murach's ADO. VBScript Programmers Reference. WebLogic: The Definitive Guide. Extending and Embedding PHP. UpdateBatch , do Set. I can't seem to get disconnected recordsets working right so far. So perhaps my comment was premature. I was not using adLockBatchOptimistic. Yeah, it was the lock type I was missing. Sorry about the misinformation. Now that I'm onto the issue about lock type, I see that you don't have to disconnect the recordset to prevent the updates from occurring as you make the changes.

True, that would be better for this case thanks However, I am also inserting a few thousand rows - and would like to do this batched rather than individually. Tony Toews Tony Toews 7, 1 1 gold badge 20 20 silver badges 26 26 bronze badges.

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