Rolling Your Own with the ListView Control

Rolling Your Own with the ListView Control

The ListView control is a versatile templated control in ASP.NET that allows you to display data in a variety of customizable formats, including lists, tables, and custom layouts. Unlike the Repeater control, which requires you to define your own templates for displaying data, the ListView control provides a rich set of built-in templates and layout options that you can use to quickly create data-driven user interfaces.

To use the ListView control, you need to define one or more templates that define the markup for the items in the data source. The ListView control supports a number of built-in templates, including ItemTemplate, GroupTemplate, LayoutTemplate, and EmptyDataTemplate.

Here’s an example of using the ListView control to display a list of products:

<asp:ListView ID=”lvProducts” runat=”server” DataSourceID=”dsProducts”>

    <LayoutTemplate>

        <table>

            <thead>

                <tr>

                    <th>Product Name</th>

                    <th>Description</th>

                    <th>Price</th>

                </tr>

            </thead>

            <tbody>

                <asp:PlaceHolder runat=”server” ID=”itemPlaceholder”></asp:PlaceHolder>

            </tbody>

        </table>

    </LayoutTemplate>

    <ItemTemplate>

        <tr>

            <td><%# Eval(“ProductName”) %></td>

            <td><%# Eval(“Description”) %></td>

            <td><%# String.Format(“{0:C}”, Eval(“Price”)) %></td>

        </tr>

    </ItemTemplate>

</asp:ListView>

In this example, the ListView control is bound to a data source named “dsProducts”, which contains a collection of products. The LayoutTemplate is used to define the overall layout of the control, which consists of a table with a header row and a placeholder for the items.

The ItemTemplate is used to define the markup for each item in the collection, which consists of a product name, description, and price. The content of the template includes data binding expressions, which are used to bind the values of the ProductName, Description, and Price fields to the markup of the control. The String.Format method is used to format the price value as a currency string.

Overall, the ListView control is a powerful and flexible tool for displaying data in a variety of customizable formats in ASP.NET. With its rich set of built-in templates and layout options, the ListView control makes it easy to build dynamic and data-driven user interfaces without having to write a lot of custom code.

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