So today I started learning ASP.NET. Unfortunately I haven\'t found any good tutorials online, and I can\'t afford to buy books at the moment, so I\'ve had to create a ASP.N
in addition to what Kirk said I want to tell you that just "playing around" won't help you to learn asp.net, and there is a lot of free and very good tutorials .
take a look on the asp.net official site tutorials and on 4GuysFromRolla site
ASP.NET WebForms doesn't work this way. What you have above is just normal HTML, so ASP.NET isn't going to give you any facility to add/remove items. What you'll want to do is use a Repeater control, or possibly a GridView. These controls will be available in the code-behind. For example, the Repeater would expose an "Items" property upon which you can add new items (rows). In the code-front (the .aspx file) you'd provide an ItemTemplate that stubs out what the body rows would look like. There are plenty of tutorials on the web for repeaters, so I suggest you google that to obtain further information.
Link for adding through JS https://www.youtube.com/watch?v=idyyQ23joy0
Please see the below link as well. This would help you add the rows dynamically on the fly: https://www.lynda.com/C-tutorials/Adding-data-HTML-tables-runtime/161815/366843-4.html
Have you attempted the Asp:Table?
<asp:Table ID="myTable" runat="server" Width="100%">
<asp:TableRow>
<asp:TableCell>Name</asp:TableCell>
<asp:TableCell>Task</asp:TableCell>
<asp:TableCell>Hours</asp:TableCell>
</asp:TableRow>
</asp:Table>
You can then add rows as you need to in the script by creating them and adding them to myTable.Rows
TableRow row = new TableRow();
TableCell cell1 = new TableCell();
cell1.Text = "blah blah blah";
row.Cells.Add(cell1);
myTable.Rows.Add(row);
Given your question description though, I'd say you'd be better off using a GridView or Repeater as mentioned by @Kirk Woll.
EDIT - Also, if you want to learn without buying books here are a few sites you absolutely need to become familiar with:
Scott Guthrie's Blog
4 Guys from Rolla
MSDN
Code Project Asp.Net