asp button click event - asp.net

Question

I am using C#.net for creating an aspx page (Visual Studio 2010).
I have copied most of the template code from online ( HTML ) but when I drop a button of asp and double click it, it doesn't redirect to the code behind page but, instead creates "onclick=btnSubmit_Click" event in the source code.
<asp:Button ID="btnSubmit" runat="server" Text="Submit" Height="30px"
Width="100px" **onclick="btnSubmit_Click"** />
Ideally it should go to the code behind page and allow event handling stuffs, I have no idea why this is happening.
My question is:
1. What do I do in order to get redirected like normal asp pages in Visual Studio
2. If possible, can someone explain what am I doing wrong here?
**I did get a way around it by using javascript
<script type="text/javascript" runat="server">
Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs)
txtName.Text="btn submit clicked"
End Sub

Answer 1

please make sure that your <%Page directive has mentioned CodeBehind file.
i.e
something like this
<%# Page Title="" Language="C#" MasterPageFile="~/MasterPage/example.Master" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="Example.default" %>
this will be on the top of your aspx page

Answer 2

Please try with the below methods.
Method 1:
Based on what I found here: http://forums.asp.net/t/1229894.aspx/1
Right click on your solution explorer.
Add New Item -> Class File.
Name the file as the name of your aspx eg: Default.aspx.cs
When it asks you the file should be in app_code click "no".
In your aspx in page attribute add
AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default"
<%# Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
Similarly in your class file that you just added remove everything. Your class should look like this:
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
Method 2: while adding new page please make sure the place code in separate file box is checked