I was using a ObjectDataSource to generate a listing including paging. The ObjectDataSource used the GetItems method of my usercontrol. See this previous post. This construction works great. But now I needed to do some custom filtering in the GetItems method based on a property of the usercontrol. At first I tried to use the property directly in the GetItems method, this didn't work the property the property returned NULL. After a small search on the internet I found the following blog post.

The solution is to dynamically add a Selectparameter that will be passed to the GetItems method. You can dynamically add Selectparameters at the OnSelecting event of the asp:ObjectDataSource,  like this:

And in you codebehind:

Now you can use YourUsercontrolProperty in the Select method of your ObjectDataSource.

Hope it helps.

In this article we're going to create a usercontrol with a button. Place this usercontrol on a page and handle the clickEvent on that page.

Step 1, the UserControl

Create a usercontrol with a button called  'clickMeButton'.

In the codebehind of your UserControl define a delegate.

Then create a public EvenHandler.

Now add a click event to the button and on the click event fire tje ButtonClickedEvent.

And the usercontrol is finished, now create a page to use the usercontrol.

Step 2, the Page

Create a new page. Add the usercontrol to the page, in the codebehind (Page_Load) attach your page to the ButtonClickedEvent.

Press tab twice to generate the following Method.

Lets implement some basic logic to the event to test if the event is working

Step3, the result

Here is the result after the user clicked the button within the usercontrol. As aspect-ed the Button Clicked text is shown.

You can download the example here (blogExamples.rar (17.87 kb))

Hope it helps!