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C# source: accessdatasource_sp.aspx   Zipcodes By State and County.sql   
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<html>
<head>
<title>Using a Stored Procedure with the AccessDataSource Control</title>
<link rel="stylesheet" href="/shared/netdemos.css">
</head>

<body>
<!-- #include virtual="~/shared/top.inc -->
<div class="header"><h2>Using a <span class="hilite">Stored Procedure</span> with the <span class="hilite">AccessDataSource Control</span></h2></div>

<!-- #include virtual="~/shared/viewsrc_top.inc" -->
<hr size=1 width=92%>

<div align="center">
<form runat="server">

   <asp:accessdatasource id="states" runat="server"
      datafile="~/app_data/usa.mdb"
      selectcommand="SELECT StateId, State FROM States WHERE NOT StateId in ( 'AA', 'AE', 'AP' ) ORDER BY State"
      datasourcemode="DataReader" />

   <asp:accessdatasource id="counties" runat="server"
      datafile="~/app_data/usa.mdb"
      selectcommand="SELECT DISTINCT County FROM Zipcodes WHERE State = ? ORDER BY County"
      datasourcemode="DataReader">
      <selectparameters>
         <asp:controlparameter controlid="lstStates" 
            propertyname="SelectedValue" />
      </selectparameters>
   </asp:accessdatasource>

   <table cellpadding=3>
   <tr>
      <td>Select State: 
      <asp:dropdownlist id="lstStates" runat="server" 
         datasourceid="states" datatextfield="state" datavaluefield="stateid" 
         autopostback /></td>
      <td>County:
      <asp:dropdownlist id="lstCounties" runat="server" 
         datasourceid="counties" datatextfield="county"
         autopostback /></td></tr>
   </table>

   <asp:accessdatasource id="zipcodes" runat="server"
      datafile="~/app_data/usa.mdb"
      selectcommand="[Zipcodes By State and County]"
      selectcommandtype="StoredProcedure">
      <selectparameters>
         <asp:controlparameter controlid="lstStates" 
            propertyname="SelectedValue" />
         <asp:controlparameter controlid="lstCounties" 
            propertyname="SelectedValue" />
      </selectparameters>
   </asp:accessdatasource>

   <br>

   <asp:gridview id="zipcodesGrid" runat="server"
      datasourceid="zipcodes"
      width=80% cellpadding=5
      font-size="10pt" enableviewstate=false
      alternatingrowstyle-backcolor="whitesmoke">

      <headerstyle backcolor="lightsteelblue"
         font-bold height=25
         horizontalalign="center" />

   </asp:gridview>

</form>
</div>

<hr size=1 width=92%>
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</body>
</html>