How to read ListView data into generic List - asp.net

Question

I have a ListView which is filled by generic list of type MyClass. I can easily bind data from this list into ListView. But I have problems with reading data in opposite direction.
This is my class:
public class MyClass
{
public int id { get; set; }
public string name { get; set; }
}
I have also generic list of type MyClass:
List<MyTest> list = new List<MyTest>();
Finally I bind data to ListView this way:
ListView1.DataSource = list;
ListView1.DataBind();
My ListView template:
<asp:ListView runat="server" ID="ListView1">
<LayoutTemplate>
<table runat="server" id="table1" >
<tr runat="server" id="itemPlaceholder" ></tr>
</table>
</LayoutTemplate>
<ItemTemplate>
<tr id="tr" runat="server">
<td id="td1" runat="server">
<asp:TextBox ID="tb1" runat="server" Text='<%#Eval("id") %>' />
</td>
<td id="td2" runat="server">
<asp:TextBox ID="tb2" runat="server" Text='<%#Eval("name") %>' />
</td>
</tr>
</ItemTemplate>
How can I read data from ListView into my List list?
The operation of reading ListView data into List generic list should begin after clicking the button "GetData"

Answer 1

I can't test this, but I believe this will work:
using System.Linq;
List<MyClass> list = ListView1.DataSource.Cast<MyClass>().ToList();
UPDATE: As noted in the comments, that only works right after you set the DataSource. If you want to get the list on a post-back, try:
List<MyClass> list = ListView1.Items
.Select(lvi=>lvi.DataItem as MyClass)
.ToList();

Answer 2

You can get at the ListViewItem in an updating event like this:
<asp:ListView ID="ListView1" runat="server" OnItemUpdating="ListView1_ItemUpdating"></asp:ListView>
void ListView1_ItemUpdating(Object sender, ListViewUpdateEventArgs e)
{
ListViewItem item = ListView1.Items[e.ItemIndex];
// I think you should also be able to do if you are indeed binding with the type List<MyTest>
List<MyTest> item = (List<MyTest>)ListView1.Items[e.ItemIndex];
}
I can show you other ways if you describe more of what the scenario is that you need to get the data.