passing the value of dropdownlist into gridview

I have a dropdownlist populated by my database, below is my code:
<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="dsNames" DataTextField="Name" DataValueField="Id"> </asp:DropDownList> <asp:SqlDataSource ID="dsNames" runat="server" ConnectionString="<%$ ConnectionStrings:dbProfilesConnectionString %>" SelectCommand="SELECT Lname+', '+Fname AS Name,Id FROM tblProfile"> </asp:SqlDataSource> Beside my Dropdownlist, I have a button and below I have a Gridview, what I want to achieve is whenever I select one of the name in my Dropdownlist, then when I click the button the name should be added in gridview. I am using asp.net with c#. Any help would be appreciated. Thanks in advance. God Bl ...