<%@ Page Language="VB" %>
<html>
<head runat="server">
<title>Filtering Data In A GridView Using a DropDownList</title>
</head>
<body>
<form id="form1" runat="server">
<b>Choose a state:</b>
<asp:DropDownList ID="DropDownList1" DataSourceID="SqlDataSource2" AutoPostBack="true"
DataTextField="state" Runat="server" />
<asp:SqlDataSource ID="SqlDataSource2" Runat="server" SelectCommand="SELECT DISTINCT [state] FROM [authors]"
ConnectionString="<%$ ConnectionStrings:Pubs %>" />
<br />
<br />
<asp:GridView ID="GridView1" AllowSorting="True" AllowPaging="True" Runat="server"
DataSourceID="SqlDataSource1" AutoGenerateEditButton="True" DataKeyNames="au_id"
AutoGenerateColumns="False">
<Columns>
<asp:BoundField ReadOnly="true" HeaderText="ID" DataField="au_id" SortExpression="au_id" />
<asp:BoundField HeaderText="Last Name" DataField="au_lname" SortExpression="au_lname" />
<asp:BoundField HeaderText="First Name" DataField="au_fname" SortExpression="au_fname" />
<asp:BoundField HeaderText="Phone" DataField="phone" SortExpression="phone" />
<asp:BoundField HeaderText="Address" DataField="address" SortExpression="address" />
<asp:BoundField HeaderText="City" DataField="city" SortExpression="city" />
<asp:BoundField HeaderText="State" DataField="state" SortExpression="state" />
<asp:BoundField HeaderText="Zip Code" DataField="zip" SortExpression="zip" />
<asp:CheckBoxField HeaderText="Contract" SortExpression="contract" DataField="contract" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" Runat="server" SelectCommand="SELECT [au_id], [au_lname], [au_fname], [phone], [address], [city], [state], [zip], [contract] FROM [authors] WHERE [state] = @state"
UpdateCommand="UPDATE [authors] SET [au_lname] = @au_lname, [au_fname] = @au_fname, [phone] = @phone, [address] = @address, [city] = @city, [state] = @state, [zip] = @zip, [contract] = @contract WHERE [au_id] = @au_id"
ConnectionString="<%$ ConnectionStrings:Pubs %>">
<SelectParameters>
<asp:ControlParameter Name="state" ControlID="DropDownList1" />
</SelectParameters>
<UpdateParameters>
<asp:Parameter Name="au_lname" />
<asp:Parameter Name="au_fname" />
<asp:Parameter Name="phone" />
<asp:Parameter Name="address" />
<asp:Parameter Name="city" />
<asp:Parameter Name="state" />
<asp:Parameter Name="zip" />
<asp:Parameter Name="contract" />
<asp:Parameter Name="au_id" />
</UpdateParameters>
</asp:SqlDataSource>
</form>
</body>
</html>
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