插入带有detailsview的项目后更新DropDownList控件

I have an update panel that includes a dropdownlist control and a detailsview control. The dropdownlist is populated by a sqldatasource control which grabs the data from a table called Places (just a list of venues). The detailsview is insert mode only and inserts places into the database table that populates the dropdownlist. I am trying to allow someone to insert a new place inside the update panel and have the dropdownlist refreshed at the same time so the user will see all places in the dropdownlist, including the one they just added with the details view. Right now, the detailsview is adding the place to the database properly but not updating the dropdownlist. If I refresh the page after adding a new place, the droplist updates with the new place. Any suggestions?I have an update panel that includes a dropdown