Basic question about accessing List values

[kenji]

Hi,

I have a really basic ASP.Net question regarding the life of variables. I'm following the book Beginning ASP.Net 4 by Apress.

The question is this, I declare a list in the .aspx page and it is available for access by the corresponding .aspx.cs class similar to the code sample below.

<select ID="Currency" runat="server" />

protected void Page_Load(Object sender, EventArgs e)
{
            if (this.IsPostBack == false)
            {
                Currency.Items.Add(new ListItem("Euros", "0.85"));
                Currency.Items.Add(new ListItem("Japanese Yen", "110.33"));
                Currency.Items.Add(new ListItem("Canadian Dollars", "1.2"));

                //hiding the image
                Graph.Visible = false;
            }
        }

How is it that the server is aware of which ListItem I have selected for processing by the page? Where is the ListItem selected stored?

Thanks

[kvprajapati]

>How is it that the server is aware of which ListItem I have selected for processing by the page?

No! server is not preserving the state (data) of ASP.NET server controls.

>Where is the ListItem selected stored?

Every ASP.NET server control is devised with "ViewState" mechanism which saves the state of every changed property.

[dnanetwork]

select your HTML page view source before selecting and
select your HTML page view source after selecting

you'll have the answer.