How to Upload file In MVC + Umbraco 7 - asp.net-mvc

Question

I am new to MVC and need help to upload File , I am using umbraco. 7.2.1
I am trying to send mail with mail with attachment
Following is my code for the same.
Partial View ==>name Contact
using (Html.BeginUmbracoForm<ContactVController>("HandleContactSubmit"))
{
#Html.LabelFor(model => model.Name)<br />
#Html.EditorFor(model => model.Name)<br />
#Html.ValidationMessageFor(model => model.Name)<br />
#Html.LabelFor(model => model.Email)<br />
#Html.EditorFor(model => model.Email)<br />
#Html.ValidationMessageFor(model => model.Email)<br />
<input type="file" name="file" id="file" />
<p>
<input type="submit" value="Submit" />
</p>
}
Model
public class ContactVModel
{
[Required]
public string Name { get; set; }
[Required]
[RegularExpression(#"[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*#(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?")]
public string Email { get; set; }
[Required]
public string Message { get; set; }
public HttpPostedFileBase attachment { get; set; }
}
Controller
public class ContactVController : SurfaceController
{
[HttpPost]
public ActionResult HandleContactSubmit(ContactVModel model)
{
,.......... ...... ....
,.......... ...... ....
MailBody + = model.Name ;
MailBody + = model.Email;
SendMail( MailBody )
}
But I do not know access model.attachment , How can I do so to send mail with attachment (the file which is uploaded ) (As I am able to acces Name, Email, etc.)
I have referred following post but I could not able to access attachment
MVC 4 Razor File Upload
but I could not make it out

Answer 1

Change the input from
<input type="file" name="file" id="file" />
to
<input type="file" name="attachment" id="attachment" />
So the property in the model matches the input field.
I'm currently using the following:
In the cshtml file:
#Html.UploadFor(model=> model.Attachment)
static public class HtmlExtensions
{
public static IHtmlString UploadFor<TSource, TResult>(this HtmlHelper<TSource> html, Expression<Func<TSource, TResult>> propertyExpression)
{
var memberName = Reflection.GetPropertyName(propertyExpression);
return new HtmlString($"<input type=\"file\" name=\"{memberName}\" id=\"{memberName}\">");
}
}
class Reflection
{
public static string GetPropertyName<TSource, TResult>(Expression<Func<TSource, TResult>> propertyExpression)
{
return (propertyExpression.Body as MemberExpression).Member.Name;
}
}