Handling events of Control's inside ASP.NET ListView

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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, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. He is the Chief Editor of a Developer Magazine called DNC Magazine. He has also authored two Books - 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook.

Follow him on twitter @suprotimagarwal.