Handling events of Control's inside ASP.NET ListView

A user recently asked me on the forums that he has a LinkButton kept inside a ListView that displayed the ProductNames. When a user clicks on the LinkButton, he should get the ProductID in codebehind to retrieve other details. Here's a quick and dirty way of how to do so by handling the OnItemCommand event of the ListView control

<asp:ListView ID="lvProducts" runat="server" DataSourceID="SqlDataSource1"

OnItemCommand="lvProducts_ItemCommand" ItemPlaceholderID="PlaceHolder1">

 <LayoutTemplate>

        <asp:Placeholder

        id="PlaceHolder1"

        runat="server" />

    </LayoutTemplate>

<ItemTemplate>

    <asp:LinkButton ID="LinkButton1" CommandArgument='<%# Eval("ProductID") %>'

    Text='<%# Eval("ProductName") %>' CommandName="View Details"

    runat="server"></asp:LinkButton><br />

</ItemTemplate>

</asp:ListView>

<asp:SqlDataSource ID="SqlDataSource1" runat="server"

    ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"

    SelectCommand="SELECT [ProductID], [ProductName], [UnitPrice] FROM [Products]">

</asp:SqlDataSource>

C#

protected void lvProducts_ItemCommand(object sender, ListViewCommandEventArgs e)

{

    if (e.CommandName == "View Details")

    {

        int productId = (int)e.CommandArgument;

    }

}

VB.NET

    Protected Sub lvProducts_ItemCommand(ByVal sender As Object, ByVal e As ListViewCommandEventArgs)

        If e.CommandName = "View Details" Then

            Dim productId As Integer = CInt(e.CommandArgument)

        End If

    End Sub

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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

Follow him on twitter @suprotimagarwal