how to connect feedback page with sql server

Question

I have provided my source code ....

 

source code::

<div class="mail animated wow zoomIn" data-wow-delay=".5s">

<div class="container">

<h3>Contact Us</h3>

<p class="est">If You Encounter any kind of problem through our website please

contact us.

</p>

<div class="mail-grids">

<div class="col-md-8 mail-grid-left animated wow slideInLeft" data-wow-delay=".5s">

<form>

<asp:textbox runat="server" id="cname" ></asp:textbox>

<asp:requiredfieldvalidator runat="server" errormessage="Field Cannot Be Blank" ControlToValidate="cname" ForeColor="#FF3300"></asp:requiredfieldvalidator>

<asp:textbox runat="server" ID="cemail" TextMode="Email"></asp:textbox>

<asp:regularexpressionvalidator runat="server" errormessage="Please Enter proper Email ID" ControlToValidate="cemail" ForeColor="#FF3300" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:regularexpressionvalidator>

<asp:textbox runat="server" ID="csubject" ></asp:textbox>

<asp:requiredfieldvalidator runat="server" errormessage="Field Cannot Be Blank" ControlToValidate="csubject" ForeColor="#FF3300"></asp:requiredfieldvalidator>

<asp:textbox runat="server" ID="cmessage" TextMode="MultiLine"></asp:textbox>

<asp:requiredfieldvalidator runat="server" errormessage="Field Cannot Be Blank" ControlToValidate="cmessage" ForeColor="#FF3300"></asp:requiredfieldvalidator>

<br />

<br />

<asp:button runat="server" text="Submit" ID="btn3" OnClick="btn3_Click" />

</form>

</div>

<div class="col-md-4 mail-grid-right animated wow slideInRight" data-wow-delay=".5s">

<div class="mail-grid-right1">

<img src="pimages/images(6).jpg" alt=" " class="img-responsive" />

<h4>Akash Srivastav <span>Admin</span></h4>

<ul class="phone-mail">

<li><i class="glyphicon glyphicon-earphone" aria-hidden="true"></i>Phone: [phone]</li>

<li><i class="glyphicon glyphicon-envelope" aria-hidden="true"></i>Email: <a href="mailto:[email protected]">[email protected]</a></li>

</ul>

<ul class="social-icons">

<li><a href="#" class="facebook"></a></li>

<li><a href="#" class="twitter"></a></li>

<li><a href="#" class="g"></a></li>

<li><a href="#" class="instagram"></a></li>

</ul>

</div>

</div>

<div class="clearfix"> </div>

</div>