📄 controlparam.aspx
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ControlParam.aspx.cs" Inherits="ControlParam" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:DropDownList ID="dwnCountry" runat="server" AutoPostBack="True" DataSourceID="sqldsCountry"
DataTextField="country" DataValueField="country">
</asp:DropDownList><div>
<asp:GridView ID="gviewCustomer" runat="server" AllowPaging="True" AutoGenerateColumns="False"
BackColor="LightGoldenrodYellow" BorderColor="Tan" BorderWidth="1px" CellPadding="2"
DataKeyNames="CustomerID" DataSourceID="sqldsCustomer" EmptyDataText="There are no data records to display."
Font-Size="10pt" ForeColor="Black">
<FooterStyle BackColor="Tan" />
<SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />
<PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" />
<HeaderStyle BackColor="Tan" Font-Bold="True" />
<AlternatingRowStyle BackColor="PaleGoldenrod" />
<Columns>
<asp:BoundField DataField="CustomerID" HeaderText="CustomerID" ReadOnly="True" SortExpression="CustomerID" />
<asp:BoundField DataField="CompanyName" HeaderText="CompanyName" SortExpression="CompanyName" />
<asp:BoundField DataField="Address" HeaderText="Address" SortExpression="Address" />
<asp:BoundField DataField="City" HeaderText="City" SortExpression="City" />
<asp:BoundField DataField="Country" HeaderText="Country" SortExpression="Country" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="sqldsCustomer" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
DeleteCommand="DELETE FROM [Customers] WHERE [CustomerID] = @CustomerID"
InsertCommand="INSERT INTO [Customers] ([CustomerID], [CompanyName], [Address], [City], [Country]) VALUES (@CustomerID, @CompanyName, @Address, @City, @Country)"
ProviderName="<%$ ConnectionStrings:NorthwindConnectionString.ProviderName %>"
SelectCommand="SELECT [CustomerID], [CompanyName], [Address], [City], [Country] FROM [Customers] where country=@paramCountry"
UpdateCommand="UPDATE [Customers] SET [CompanyName] = @CompanyName, [Address] = @Address, [City] = @City, [Country] = @Country WHERE [CustomerID] = @CustomerID">
<DeleteParameters>
<asp:Parameter Name="CustomerID" Type="String" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="CompanyName" Type="String" />
<asp:Parameter Name="Address" Type="String" />
<asp:Parameter Name="City" Type="String" />
<asp:Parameter Name="Country" Type="String" />
<asp:Parameter Name="CustomerID" Type="String" />
</UpdateParameters>
<InsertParameters>
<asp:Parameter Name="CustomerID" Type="String" />
<asp:Parameter Name="CompanyName" Type="String" />
<asp:Parameter Name="Address" Type="String" />
<asp:Parameter Name="City" Type="String" />
<asp:Parameter Name="Country" Type="String" />
</InsertParameters>
<SelectParameters>
<asp:ControlParameter ControlID="dwnCountry" Name="paramCountry" PropertyName="SelectedValue" />
</SelectParameters>
</asp:SqlDataSource>
<asp:SqlDataSource ID="sqldsCountry" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
EnableCaching="True" SelectCommand="SELECT distinct [Country] FROM [Customers]" ProviderName="System.Data.SqlClient">
</asp:SqlDataSource>
</div>
</form>
</body>
</html>
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