How can I create a custom Repeater that displays Header, Footer based on properties?

Question

I want to create a Repeater that displays the header/footer based on properties, only if the DataSource is empty.

public class Repeater : System.Web         


        

Answer 1

[ToolboxData("<{0}:SmartRepeater runat=\"server\">")]
public partial class SmartRepeater : Repeater
{
    public bool ShowHeaderOnEmpty { get; set; }
    public bool ShowFooterOnEmpty { get; set; }

    private ITemplate emptyTemplate = null;

    [PersistenceMode(PersistenceMode.InnerProperty)]
    public ITemplate EmptyTemplate
    {
        get { return this.emptyTemplate; }
        set { this.emptyTemplate = value; }
    }

    protected override void OnDataBinding(EventArgs e)
    {
        base.OnDataBinding(e);
        if (this.Items.Count == 0)
        {
            this.Controls.Clear();

            if (this.HeaderTemplate != null && ShowHeaderOnEmpty)
                this.HeaderTemplate.InstantiateIn(this);

            if (this.EmptyTemplate!=null)
                this.EmptyTemplate.InstantiateIn(this);

            if (this.FooterTemplate != null && ShowFooterOnEmpty)
                this.FooterTemplate.InstantiateIn(this);
        }
    }
}

Usage:

    HEADER
    Item
    , 
    Nothing
    FOOTER