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Implementing Model-View-Presenter in ASP.NET

, 17 Nov 2007
Three implementations of Model-View-Presenter in ASP.NET 2.0.
MVPSampleApp.zip
MVP.SampleApp
Lib
Microsoft.Practices.EnterpriseLibrary.Common.dll
Microsoft.Practices.EnterpriseLibrary.Data.dll
MySql.Data.dll
nunit.framework.dll
Rhino.Mocks.dll
Model
Data
Interfaces
Properties
Presentation
Presentation.Tests
Properties
Interfaces
Properties
SubSonic
ActiveRecord
Builder
CodeGeneration
Templates
CodeLanguage
Configuration
Controls
Calendar
lang
skin
active-bg.gif
calendar.gif
dark-bg.gif
hover-bg.gif
menuarrow.gif
normal-bg.gif
rowhover-bg.gif
status-bg.gif
title-bg.gif
today-bg.gif
Resources
DataProviders
Properties
Sql Tools
SubSonic.snk
Sugar
WebApp
App_Data
Views
SQL2000SampleDb.zip
using System;
using System.Data;
using System.Web.UI.WebControls;
using Presentation;
using Presentation.Interfaces;

/// <remarks>
///		Class Views_EmployeesView is our IEmployeesView. It is the View in the MVP relationship. 
///		This view knows about its presenter. It must instantiate the presenter, 
///		passing into it an instance of itself and the model. It is also responsible for
///		responding to presenter events, such as redirects, ect. 
/// </remarks>
public partial class Views_EmployeesView : System.Web.UI.UserControl, IEmployeesView 
{
	private EmployeesPresenter presenter;

	protected void Page_Load(object sender, EventArgs e)
	{
		presenter = new EmployeesPresenter(this, new Model.EmployeeDAO());
		presenter.RequestEmployeeEdit += new EventHandler<SingleValueEventArgs<int>>(RequestEmployeeEditListener);
		presenter.InitView(Page.IsPostBack);
	}

	private void RequestEmployeeEditListener(object sender, SingleValueEventArgs<int> e)
	{
		int employeeID = e.Value;
		Response.Redirect("EmployeeEdit.aspx?employee=" + employeeID, true);
	}

	#region IEmployeesView Members

	public void SetEmployees(IDataReader employeesReader)
	{
		ddlEmployees.DataSource = employeesReader;
		ddlEmployees.DataValueField = "EmployeeID";
		ddlEmployees.DataTextField = "LastName";
		ddlEmployees.DataBind();
		ddlEmployees.Items.Insert(0, new ListItem("Select Employee", "0"));
	}

	public void SetEmployeeDetails(Model.Data.Interfaces.IEmployee employee)
	{
		if (employee == null)
		{
			lblEmployeeID.Text = string.Empty;
			lblEmployeeLastName.Text = string.Empty;
			lblEmployeeFirstName.Text = string.Empty;
			lblTitle.Text = string.Empty;
		}
		else
		{
			lblEmployeeID.Text = employee.EmployeeID.ToString();
			lblEmployeeLastName.Text = employee.LastName;
			lblEmployeeFirstName.Text = employee.FirstName;
			lblTitle.Text = employee.Title;
		}
	}

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

	#endregion
	protected void ddlEmployees_SelectedIndexChanged(object sender, EventArgs e)
	{
		presenter.UpdateEmployeeDetails(ddlEmployees.SelectedValue);
		if (int.Parse(ddlEmployees.SelectedValue) > 0)
		{
			btnEdit.Visible = true;
		}
		else
		{
			btnEdit.Visible = false;
		}
	}
	protected void btnEdit_Click(object sender, EventArgs e)
	{
		presenter.EditEmployee(int.Parse(ddlEmployees.SelectedValue));
	}
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Alex Mueller
Web Developer
United States United States
No Biography provided

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Web02 | 2.8.140721.1 | Last Updated 17 Nov 2007
Article Copyright 2007 by Alex Mueller
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