Implementing Model-View-Presenter in ASP.NET

using System;
using System.Data;
using System.Web.UI.WebControls;
using Model.Data.Interfaces;
using Presentation;
using Presentation.Interfaces;

/// <remarks>
///		Class Views_ProductsView is our IProductsView. It is the View in the MVP relationship. 
///		This view knows about its presenter, and it must attach the presenter. 
///		The View initializer (ASPX) creates the MVP relationship. 
/// </remarks>
public partial class Views_ProductsView : System.Web.UI.UserControl, IProductsView
{
	private ProductsPresenter presenter = null;

	#region IProductsView Members

	public void AttachPresenter(ProductsPresenter presenter)
	{
		Check.IsNotNull(presenter, "presenter cannot be null");

		this.presenter = presenter;
	}

	public void SetProducts(IDataReader productsReader)
	{
		ddlProducts.DataSource = productsReader;
		ddlProducts.DataValueField = "ProductID";
		ddlProducts.DataTextField ="ProductName";
		ddlProducts.DataBind();
		ddlProducts.Items.Insert(0, new ListItem("Select Product", "0"));
	}

	public void SetProductDetails(IProduct product)
	{
		if (product == null)
		{
			lblCategoryID.Text = string.Empty;
			lblDiscontinued.Text = string.Empty;
			lblProductID.Text = string.Empty;
			lblProductName.Text = string.Empty;
			lblQuantityPerUnit.Text = string.Empty;
			lblReorderLevel.Text = string.Empty;
			lblSupplierID.Text = string.Empty;
			lblUnitPrice.Text = string.Empty;
			lblUnitsInStock.Text = string.Empty;
			lblUnitsInOrder.Text = string.Empty;
		}
		else
		{
			lblCategoryID.Text = product.CategoryID.ToString();
			lblDiscontinued.Text = product.Discontinued.ToString();
			lblProductID.Text = product.ProductID.ToString();
			lblProductName.Text = product.ProductName;
			lblQuantityPerUnit.Text = product.QuantityPerUnit;
			lblReorderLevel.Text = product.ReorderLevel.ToString();
			lblSupplierID.Text = product.SupplierID.ToString();
			lblUnitPrice.Text = product.UnitPrice.ToString();
			lblUnitsInStock.Text = product.UnitsInStock.ToString();
			lblUnitsInOrder.Text = product.UnitsOnOrder.ToString();
		}
	}

	public void SetRefreshTime(DateTime dateTime)
	{
		lblTime.Text = dateTime.ToString();
	}

	#endregion

	protected void ddlProducts_SelectedIndexChanged(object sender, EventArgs e)
	{
		presenter.UpdateProductDetails(ddlProducts.SelectedValue);
		if(int.Parse(ddlProducts.SelectedValue) > 0)
		{
			btnEdit.Visible = true;
		}
		else
		{
			btnEdit.Visible = false;
		}
	}
	protected void btnEdit_Click(object sender, EventArgs e)
	{
		presenter.EditProduct(int.Parse(ddlProducts.SelectedValue));
	}
}