objectdatasource

I have a GridView with an ObjectDataSource and I want to be able to sort it. Paging works correctly, however Sorting gives me an exception: The GridView gridView fired event Sorting which wasn't handled. How do I enable sorting on the server side? (i.e. gridView.EnableSortingAndPagingCallbacks must remains false) Set the gridView.AllowSorting property to true. From here the grid should allow you to sort data automatically on postback if you are using an object that implements IBindingList. However, since that is most likely not the case, you should take TheTXI's advice above and handle the

This is a general how does DataBind work questions... I have a simple page with a GridView that is bound (in the aspx code) to an ObjectDataSource. I can look in the Select() function called by the ObjectDataSource to see that it is called on the initial load and on every post back. I have some logic that happens on post backs that will affect the GridView's data, and I want to call GridView.DataBind() later on in the post back, after I've made some changes. Is there a way to prevent the automatic rebinding that happens on each post back? Does this mean I can't use an ObjectDataSource for this

I'm trying to add parameters to an objectDataSource at runtime like this: Parameter objCustomerParameter = new Parameter("CustomerID", DbType.String, customerID); Parameter objGPDatabaseParameter = new Parameter("Database", DbType.String, gpDatabase); //set up object data source parameters objCustomer.SelectParameters["CustomerID"] = objCustomerParameter; objCustomer.SelectParameters["Database"] = objGPDatabaseParameter; At what point in the objectDataSource lifecycle should these parameters be added (what event)? Also, some values are coming from a master page property (which loads after the

My question is similar to this one but I'm having some problems with the actual implementation. I've got a report (.rdlc) in the business layer of a 3-tier app. I've got an object in the BL ( EmployeeManager ) which has a GetEmployees(Expression as Expression(Of Func(Of Employee, Boolean))) As IQueryable(Of Employee) method. As I didn't want to try and pass a lambda in directly (at least not until I've got something working), I've created a ReportData class in the BL which wraps the GetEmployees() call and exposes the results as an IEnumerable(Of Employee) - which should be very simple. It

I have a GridView that has a DataSourceID pointing to an ObjectDataSource. The ObjectDataSource points to a method that returns a LINQ IQueryable by using the TypeName, SelectMethod, and SelectCountMethod properties of the ObjectDataSource control. What happens is that the data loads properly upfront. However, on postback, if I remove the rows from the GridView and try to rebind using the explicit GridView.DataBind(), it doesn't work. I know LINQ is returning the proper rowcount and such because I've called the countmethod and it returns the proper rowcount. Here's a quick example: <asp

If a web page needs some data, why not just have a SQLDataSource call a stored procedure? Why use an ObjectDataSource to call a business object that then calls the stored procedure? I understand that other apps (lets say desktop apps) built on the .net framework can access the business objects, but what if the application will always be only a web app? To be more clear: When should one use an SqlDataSource or ObjectDataSource ? How does one motivate the choice? marc_s Having just a SQLDataSource is perfectly valid, if it's just a demo, a prototype, or a quick hack. It's fast, it's easy, it

I have an object map similar to what's listed below. When I try to bind the properties of NestedClass in a GridView I get the error: "A field or property with the name 'NestedClass.Name' was not found on the selected data source." The GridView is bound to an ObjectDataSource and the ObjectDataSource is bound to a fully populated instance of BoundClass. Is there any way around this? Sample classes: public class BoundClass { public string Name { get; set; } public NestedClass NestedClass { get; set; } } public class NestedClass { public string Name { get; set; } } Evan Only immediate properties