How to save the record mutipule table using Asp.net MVC Json - asp.net-mvc

Question

i am creating simple sales system for my final year project. i am creating a sales Form. attached the screen shot image below how the form look like.
after sales completed i need to save the data into multiple table along with the lastinsert id. if i click print invoice button. i have a tables in the database sales,sales product i shown the shot shotimage below.i don't how to save records into multipule table with lastinsert id.
enter image description here
Sales Table
id date subtotal
Sales_Product Table
id sales_id product_id price qty total
Code which i tried
jQuery
function addProject() {
var table_data = [];
$('#product_list tbody tr').each(function (row, tr) {
var sub = {
//these records i am going to add into sales table
'barcode': $(tr).find('td:eq(1)').text(),
'pname': $(tr).find('td:eq(2)').text(),
'pro_price': $(tr).find('td:eq(3)').text(),
'qty': $(tr).find('td:eq(4)').text(),
'total_cost': $(tr).find('td:eq(5)').text(),
};
table_data.push(sub);
});
//these records i am going to add into sales
var total = $("#total").val();
$.ajax({
type: 'POST',
url: '/product/Save',
dataType: 'JSON',
data: {
total: $('#total').val(), data: table_data
},
success: function (data) {
console.log(_data);
var msg;
if (isNew) {
msg = "Sales Completed";
}
last_id = data.last_id
window.location.href = "print.php?last_id=" + last_id;
$.alert({
title: 'Success!',
content: msg,
type: 'green',
boxWidth: '400px',
theme: 'light',
useBootstrap: false,
autoClose: 'ok|2000'
});
isNew = true;
},
error: function (xhr, status, error) {
alert(xhr);
}
});
}
Controller
[HttpPost]
public ActionResult Save(sale s)
{
bool status = false;
if (ModelState.IsValid)
{
using (saleEntities3 dc = new saleEntities3())
{
//Sales table
var v = dc.sales.Where(a => a.id == s.id).FirstOrDefault();
dc.sales.Add(v);
dc.SaveChanges();
v.id = s.id; // lastinsertid
//how to add into lastinsertid as a sales product table as a sales_id colum
//Sales product table i don't how to add
status = true;
}
}
return new JsonResult { Data = new { status = status } };
}
saleEntities3
public partial class saleEntities3 : DbContext
{
public saleEntities3()
: base("name=saleEntities3")
{
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
throw new UnintentionalCodeFirstException();
}
public virtual DbSet<product> products { get; set; }
public virtual DbSet<sale> sales { get; set; }
public virtual DbSet<sales_product> sales_product { get; set; }
}
}

Answer 1

To save in the Sales_Product table you need to save with the id of the saved sales according to your table structure
[HttpPost]
public ActionResult Save(sale s)
{
bool status = false;
if (ModelState.IsValid)
{
using (saleEntities3 dc = new saleEntities3())
{
//Sales table
var v = dc.sales.Where(a => a.id == s.id).FirstOrDefault();
dc.sales.Add(v);
dc.SaveChanges();
dc.sales_product.Add(new sales_product{
sales_id = s.id,
product_id = s.barcode, //I believe this is the product id
price = s.pro_price,
quantity = s.qty,
total = s.total_cost
});
dc.SaveChanges();
status = true;
}
}
return new JsonResult { Data = new { status = status } };
}