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Asked: 2026-05-10T17:33:07+00:00

I have a form that contains a GridView control which is databound to an

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I have a form that contains a GridView control which is databound to an ObjectDataSource Control. There are several TextBox controls that are already being used as ControlParameters for the ObjectDataSource. I also have a custom data object that the ObjectDataSource is associated with {TypeName=’myDataClass’}. The values are passed from the ObjectDataSource to myDataClass.

Now I need to also use a multi-select ListBox as a ControlParameter. When I use the SelectedValue parameter of the ListBox, the ObjectDataSource is only seeing the first selected item in the list.

Here’s the question: How can I get all the multi-select ListBox values passed into my custom object ‘myDataClass’ instead of just the first one selected? Hence the [‘multi-select’]

Thanks for any help!

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1 Answer

  1. Multi-select list boxes are tricky. You need to loop through the items in code to build a list of selected values. So you will probably need to implement a custom parameter that does this for you.

    You might end up needing to bind to the grid from code-behind, instead of doing it declaratively.

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