专家姓名: DataSourceID="SqlDataSource1" DataTextField="PF_Name"
DataValueField="PF_Name"
onselectedindexchanged="DropDownList1_SelectedIndexChanged">
/asp:DropDownList
专家ID:/asp:Label
ConnectionString=""
SelectCommand="SELECT [PF_Name] FROM [Professor_Info]">/asp:SqlDataSource
你不是有个DropDownList1_SelectedIndexChanged方法做处理了吗？
在里面用e.SelectedValue还是啥就可以取到值，再赋值过去就可以了啊