Get data from database between two dates using Google Charts asp.net - sql-server

Question

I want to get data from database using two dates and get displayed in a chart.
I have used the link for the chart: https://www.aspsnippets.com/Articles/Google-Charts-in-ASPNet-MVC-Google-Pie-Doughnut-Chart-example-with-database-in-ASPNet-MVC.aspx
I have used the following video for the dates and getting data from the database: https://youtu.be/Rm4uiny5Ano
**CONTROLLER:**
public ActionResult Index()
{
mymodel db = new mymodel();
db.slips = AjaxMethod();
return View(db);
}
[HttpPost]
public JsonResult AjaxMethod(DateTime? start, DateTime? end)
{
string query = "SELECT [status], sum(total_amount) as Payment";
query += " FROM slips WHERE convert(varchar,date_paid, 101) BETWEEN '" + start + "' AND '" + end + "' and status='Paid' and inv_type='Valid' GROUP BY [status]";
string constr = ConfigurationManager.ConnectionStrings["Constring"].ConnectionString;
List<object> chartData = new List<object>();
chartData.Add(new object[]
{
"status", "Payment"
});
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(query))
{
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
con.Open();
using (SqlDataReader sdr = cmd.ExecuteReader())
{
while (sdr.Read())
{
chartData.Add(new object[]
{
sdr["status"], sdr["Payment"]
});
}
}
con.Close();
}
}
return Json(chartData);
}
private DbSet<slip> AjaxMethod()
{
throw new NotImplementedException();
}
It should display data from a database using a chart. But then there's an error that it throws on the "AjaxMethod()" method. I don't know if my code on the "Index" it's correct.
Chart Data

Answer 1

There is much more to this but just for your question and comment, you can create a Payment class and then a list of those and return that data. This should all be in the proper files (per class) to do it right.
How you use this list of payments I will leave up to you but you can start with this perhaps. Your model for example might include the text for the column headers.
using PaymentRepository;
public ActionResult Index()
{
PaymentModel db = new PaymentModel();
// the model might also do this directly
var chartData = PaymentRepository.GetPaidPaymentList();
db.slips = chartData;
return View(db);
}
[HttpPost]
public JsonResult GetPaymentList(DateTime start, DateTime end)
{
var chartData = PaymentRepository.GetPaymentByStatusList(start,end);
return Json(chartData);
}
// put in a class with using Payment
public class PaymentRepository
{
public static List<Payment> GetPaidPaymentList()
{
DateTime startDate = DateTime.MinValue;
DateTime endDate = DateTime.Now;
string status = "Paid";
return GetPaymentByStatusList(startDate, endDate, status = );
}
public static List<Payment> GetPaymentByStatusList(DateTime startDate, DateTime endDate, string status = "Paid")
{
List<Payment> payments = new List<Payment>();
using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["Constring"].ConnectionString))
{
var sqlQuery = #"
SELECT [status], SUM(total_amount) as Payment
FROM slips
WHERE WHERE date_paid >= #startDate AND date_paid < #endDate
AND status = #status'
AND inv_type = 'Valid'
GROUP BY [status];
";
connection.Open();
using (SqlCommand cmd = new SqlCommand(sqlQuery, connection))
{
cmd.Parameters.Add("#startDate", System.Data.SqlDbType.DateTime);
cmd.Parameters["#startDate"].Value = startDate;
cmd.Parameters.Add("#endDate", System.Data.SqlDbType.DateTime);
cmd.Parameters["#endDate"].Value = endDate;
cmd.Parameters.Add("#status", System.Data.SqlDbType.VarChar);
cmd.Parameters["#status"].Value = status;
using (SqlDataReader reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var payment = new Payment()
{status = (string)reader["status"], payment = (decimal)reader["Payment"]};
payments.Add(payment);
}
}
}
connection.Close();
}
return payments;
}
}
public class Payment
{
public string status
{
get;
set;
}
public decimal payment
{
get;
set;
}
}