Simplest example of MVP design pattern of Asp.net

#region IView Members

public string Label
{
get
{
return Label1.Text;
}
set
{
Label1.Text = value;
}
}

public string TextBox
{
get
{
return TextBox1.Text;
}
set
{
TextBox1.Text = value;
}
}

#endregion

Add an event for the button and write the code to get the data from Model through presenter and then bind it to the View. In the constructor of Presenter we passed "this" which means reference of the same aspx page.

protected void Button1_Click(object sender, EventArgs e)
{
Presenter p = new Presenter(this, new WebApplication1.Model());
p.BindModalView();
}

And you have implemented a small application with MVP pattern. Now I want to add a few more lines to show the advantage of adding IView and IModel interface. Using these interface your code will be more manageable and reusable. Moreover if you want to test your application you can create a TestProject and can use the IView and IModel for Mock Implementation. And unit test your application.

In the next part of this article I'll try to show you how to test this application using NUnit or any other tool like MockUp for Unit testing.

Hope this was helpful.