How to take action when selecting from dropdownlist

This might be a dumb question, but I am populating a dropdownlist with database values. And whenever someone is making a selection from that list I want the repeater on the page to be filled with something based on the value of the selected item in the dropdown. I DON'T want a button to be pressed when to refresh the repeater, I want this to be done as soon as the user selects something. I tried the selectedinsexchanged event and nothing happens...

kind regards
Henrik

You need to set "autopostback=true" so that when the selected index is changed it causes a postback to the server.

Ok I have a BindGrid() method that to the following:

fill the dropdownlist and the repeater with data
that method is called in page_load with the condition
if(!IsPostback)
{
BindData();
}

the BindGrid makes select from the db and set databind for both the webcontrols.

Should I also use binddata in the event

private DropDownList_SelectedIndexChanged()
{
BindData();
}

Or how should I do it??? Note that Im using developer studio, so many changes can be done with the GUI

kind regards
Henrik

Also, set the autopostback property on the dropdownlist to true;

The way you are doing it looks just fine. That's how I would do it.