asp.net mvc , raw sql : Display data in Views generated using aggregate function
asp.net-mvc entity-framework-6 sql sql-server
Question
I am using ASP.NET MVC, EF 6 and SQL Server 2008.
I want to generate a view which would show sum of all the sales in each day for a particular month in a particular year.
I found LINQ query very complicated in such type of job, So I used a raw SQL query. I wrote query and tested in SQL server and it worked fine.
select
YEAR(Date) as Year,
MONTH(Date) as month,
DAY(Date) as date,
SUM(GrandTotal) as Total
from
Sales
where
Year(Date) = 2014
and MONTH(Date) = 12
group by
DAY(Date), YEAR(Date), MONTH(date)
Result
Well currently I don't have much data. But it looks like I got what I wanted from a query.
I wrote a controller for this purpose and now I have no idea how to display this data in View.
public ActionResult MonthlySalesByDate()
{
DateTime today = DateTime.Now.Date;
int _year = today.Year;
int _month = today.Month;
//raw sql query
string query = "select SUM(GrandTotal) as Total, DAY(Date) as date, MONTH(Date) as month, YEAR(Date) as Year from Sales where Year(Date) = " + _year + " and MONTH(Date) =" + _month + " Group by DAY(Date), YEAR(Date), MONTH(date)";
//executing raw sql query
var _model = db.Stocks.SqlQuery(query).ToList();
return View(_model);
}
Please help me out with this. If there is better way of doing this or if I am making mistakes, please let me know.
Accepted Answer
Start by creating view models to represent what you want to display in the view
public class DayTotalVM
{
public int Day { get; set; }
[DisplayFormat(DataFormatString = "{0:C}")]
public decimal Total { get; set; }
}
public class SalesVM
{
[DisplayFormat(DataFormatString = "{0:MMMM yyyy}")]
public DateTime Date { get; set; }
public List<DayTotalVM> Days { get; set; }
}
The sql query you have can be generated in linq and projected into your view models using
int year = 2014;
int month = 12;
var query = db.Sales.Where(x => x.Date.Year == year && x.Date.Month == month)
.GroupBy(x => x.Date).Select(g => new DayTotalVM
{
Day = g.Key.Day,
Total = g.Sum(x => x.Total)
})
However this will only give you the 2 items as per you above image, but from the comments you want to display all days in the month, so you can add
int daysInMonth = DateTime.DaysInMonth(year, month);
List<DayTotalVM> days = new List<DayTotalVM>();
for(int i = 1; i < daysInMonth + 1; i++)
{
DayTotalVM item = new DayTotalVM () { Day = i };
DayTotalVM ex = query.Where(x => x.Day == i).FirstOrDefault();
if (ex != null)
{
item.Total = ex.Total;
}
days.Add(item);
}
and finally initialize and return your view model
SalesVM model = new SalesVM();
{
Date = new DateTime(year, month, 1),
Days = days
}
return View(model);
And then the view would be
@model SalesVM
@Html.DisplayFor(m => m.Date);
<table>
@for(int i = 0; i < Model.Days.Count; i++)
{
<tr>
<td>@Html.DisplayFor(m => m.Days[i].Day)</td>
<td>@Html.DisplayFor(m => m.Days[i].Total)</td>
</tr>
}
</table>
Edit
The for loop could be replace by using a GroupJoin()
public ActionResult MonthlySalesByDate(int year, int month)
{
int daysInMonth = DateTime.DaysInMonth(year, month);
var days = Enumerable.Range(1, daysInMonth);
var query = db.Sales.Where(x => x.Date.Year == year && x.Date.Month == month).Select(g => new
{
Day = g.Date.Day,
Total = g.Total
});
var model = new SalesVM
{
Date = new DateTime(year, month, 1),
Days = days.GroupJoin(query, d => d, q => q.Day, (d, q) => new DayTotalVM
{
Day = d,
Total = q.Sum(x => x.Total)
}).ToList()
};
return View(model);
}
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