I'm trying to create a pie chart in asp.net mvc however when I'm trying to fetch the data from sql it displays multiple queries save in database, is their a way to get sum of multiple same queries and load the sum in the pie chart
#(Html.EJS().AccumulationChart("container5")
.Series(sr =>
{
sr.Type(Syncfusion.EJ2.Charts.AccumulationType.Pie)
.XName("Heading")
.YName("Factor_Score")
.Name("Factor_Score")
.Explode(true)
.DataLabel(dl => dl.Visible(true).Name("Factor_Score").Position(Syncfusion.EJ2.Charts.AccumulationLabelPosition.Outside).ConnectorStyle(cs => cs.Type(Syncfusion.EJ2.Charts.ConnectorType.Line).Length("5 %")).Font(ft => ft.Size("14px")))
.Animation(animate => animate.Enable(true))
.Radius("70%")
.StartAngle(0)
.EndAngle(360)
.InnerRadius("0%")
.GroupTo("9")
.GroupMode(Syncfusion.EJ2.Charts.GroupModes.Point)
.DataSource(ViewBag.dataSource1).Add();
})
.EnableSmartLabels(true)
.Tooltip(tp => tp.Enable(true))
.LegendSettings(leg => leg.Visible(true)).Title("Loan Audit Finding Detail Checklist").Render()
Controller:
string a = Heading;
int b = Convert.ToInt32(Factor_Score);
PieChartData_Data_View.Add(new PieChartSourceDataData_View(a, b));
[1
For me to give you a complete example I would have to see the whole controller Action. But I assume you would do something like this in the contoller action.
var whateverYouWant = db.YourTable.ToList();
foreach(var arm in whateverYouWant)
{
var sum = arm.ArmQuestions.Count();
}
You would have to load all the categories you wanted to count. You could also do this with a better query like I had posted but without seeing everything, im doing it blind..
Related
I have this, but it loads each and every ebay row individually, generating thousands of SQL statements:
$products = \app\models\Product::find()
->joinWith('ebay', false, 'inner join')
->indexBy(function($row){return $row->ebay->epid;})
->all();
I tried this, but it gave an error: 'Getting unknown property: app\models\Product::ebay.epid'
$products = \app\models\Product::find()
->joinWith('ebay', false, 'inner join')
->indexBy('ebay.epid')
->all();
Setting eager loading = true doesn't help either. It still loads each row individually then loads them again at the end.
How can I efficiently join a table in Yii and index by a value in the joined table?
You won't be able to do it with indexBy. However, ArrayHelper::index can index an array on a related model field. So here's how it can be done:
$products = \app\models\Product::find()
->with('ebay')
->all();
ArrayHelper::index($products, 'ebay.epid');
The code will run two queries, one to get all products, one to get all related ebay products. Then the array will be indexed with no DB queries at all.
I ended up doing it manually for a subset of the ids and it only uses 2 queries. I'd still be interested in the indexBy though.
$products = Product::find()->joinWith('ebay', true, 'inner join')->where(['ebay.epid' => $productIds])->all();
$ebayProducts = array();
foreach ($products as $p) {
$ebayProducts[$p->ebay->epid] = $p;
}
If you want index by relation recods via joinWith() or with() results you can use following:
->with(['relationName' => function($q) {
$q->indexBy('field_name');
}])
I have an MVC 3 project in Visual Studio c#. I have a LINQ to SQL query which works fine and by following an example listed elsewhere on stackoverflow:
Comparing two lists using linq to sql
I have been able to successfully reduce my results where my two nested collections match. This is the bit of code that did the trick (example from the link above):
var anyDesiredSkills = canidateSkills.Any( c => desiredSkills.Select( ds => ds.SkillId ).Contains( c.SkillId ) );
I've adapted this successfully, but now I need to be able to filter records using more than one condition. I was wondering if anyone would be able to adapt the above to show how you could include more than one condition?
To give you some background on what my goal is:
A search page where you can select any number of contacts
Each contact added to the search criteria may/may not have a 'role' assigned. If a role is present this should be factored in to the query.
Results returned based on this dynamic criteria.
Thanks in advance for any and all help :O)
It sounds like you're looking for something like:
var desiredSkillIds = desiredSkills.Select(_=>_.SkillId).ToList();
var matchingContacts =
from contact in Contacts
where contact.Role == null || desiredRoles.Contains(contact.Role)
where contact.Skills.Any(cs=> desiredSkillIds.Contains(cs.SkillId))
select contact;
Or in method-based syntax:
var matchingContacts = Contacts
.Where(contact => contact.Role == null || desiredRoles.Contains(contactRole))
.Where(contact => contact.Skills.Any(cs => desiredSkillIds.Contains(cs.SkillId)));
Here's the final code I used:
servicelist = servicelist.Where(
d => d.ContactSelection.Any(
h => model.ContactFilter.Select(ds => ds.StaffNumber).Contains(h.StaffNumber)
&&
model.ContactFilter.Select(ds => ds.ContactRole).Contains(h.ContactRole) || model.ContactFilter.Select(ds => ds.StaffNumber).Contains(h.StaffNumber) && model.ContactFilter.Select(ds => ds.ContactRole).Contains("0"))
);
Note that the last filter .Contains("0) is the value of '-- select role --' which is an option injected in to the drop down. Hope this helps anyone else!
For several pages I use a .Count inside a foreach loop
#model ICollection<Item>
foreach(var item in Model)
{
#item.Flight.FlightReservations.count
}
Because of lazy loading the EF makes a round trip to the database for this.
Now I want to fix this by using this or linq version:
Include("List.Flight.FlightReservations")
Doing this makes loading my dbSet take even longer than those foreach round trips
How can I 'load' parts of only 1 object?
I would like to use context.Items.Single(p => p.id == id).Include(.....)
So I only load 1 item fully.
Or any other solutions for this?
(A way to force load item.List.item2.List inside controller)
Any suggestions are welcome :) Thanks
EDIT : now using
Where(..).ToDictionary(item => item, item => item.Flight.FlightReservations.Count);
Also noticed adding an index to my 'clustered index' table helped a little.
Still slow though
var f = _pr.FindBy(duifid);
var result = (from p in f.IngeschrevenVluchten
select new PrestatieModel
{
Eindpos = p.Eindpositie,
Locatie = p.Vlucht.Locatie.Naam,
AantalInschrijvingen = p.Vlucht.Inschrijvingen.Count(),
Vlucht = p.Vlucht
});
This query executes very fast, making a IEnumerable<Model>. But still it loads very slow once sent to the view.
return PartialView(result);
I'm attempting to write a search function for a database table that needs to access information from related tables using Entity Framework. However, I'm running into problems getting the data back out of my initial query after doing a join on the parent table and the related tables. My code currently looks like this. I initialize my queryable object
IQueryable<PurchaseOrder> po = _context.PurchaseOrders;
Where PurchaseOrder is an Entity type. Then there is a series of blocks like this.
if (!String.IsNullOrEmpty(searchViewModel.Comment)){
var helper = _context.PurchaseOrderComments.Where(x => x.CommentText.Contains(searchViewModel.Comment));
var mid = po.Join(helper, r => r.PurchaseOrderID, u => u.PurchaseOrderID, (r, u) =>
new
{
PurchaseOrderID = r.PurchaseOrderID,
PurchaseOrderNumber = r.PurchaseOrderNumber,
VendorID = r.VendorID,
ContractNumber = r.ContractNumber,
BuyerUserID = r.BuyerUserID
});
po = mid.Select(x => new PurchaseOrder
{
PurchaseOrderID = x.PurchaseOrderID,
PurchaseOrderNumber = x.PurchaseOrderNumber,
VendorID = x.VendorID,
ContractNumber = x.ContractNumber,
BuyerUserID = x.BuyerUserID
});
}
After each block, po is passed to the next search parameter. However, as you might guess, my program complains that I can't build a complex type in mid's Select statement. I've also tried building PurchaseOrder objects from the contents of mid, inserting them into a new List of PurchaseOrders, and converting that list into a queryable to assign to po to pass on to the next block. However, that changes po's data type from System.Data.Object.ObjectSet to System.Collections.Generic.List, which then throws an InvalidOperationException the next time I try and iterate through it using a foreach.
So my question is, are there any obvious mistakes in my approach or any suggestions for other ways to approach the problem? Thanks very much for any help.
I think you're making this more complicated than it needs to be. If I understand what you're trying to do, you should be able to do something like this:
if (!String.IsNullOrEmpty(searchViewModel.Comment)){
po = po.Where(
o => o.PurchaseOrderComments.Any(
c => c.CommentText.Contains(searchViewModel.Comment)));
}
StriplingWarrior's solution is the best way. In case that your PurchaseOrder class really doesn't have a navigation collection of PurchaseOrderComments (which would force you to use a join) the following should work and is simpler as your double projection:
po=po.Join(helper, r => r.PurchaseOrderID, u => u.PurchaseOrderID, (r, u) => r);
Not sure how this is done, I have my .edmx set up so that the navigation properties match the foreign key relationships on the tables. Not sure if I still need to perform joins or if EF will give me access to the related table data through the navigational properties automatically.
What I need to do it get all the ContentSections and their associated ContentItems based on the ContentView and filtered by the DiversionProgram.CrimeNumber.
I would like to get back IEnumerable, for each ContentSection it should have access to it's ContentItems via the navigation property ContentItems
Thanks
Something like:
using(Entities context = new Entities())
{
IEnumerable<ContentSection> enumerator = context.ContentSections
.Include("ContentItems")
.Where<ContentSection>(cs => cs.ContentView.ContentViewID == someID && cs.ContentItems.Where<ContentItem>(ci => ci.DiversionProgram.CrimeNumber == someCrimeNumber))
.AsEnumerable<ContentSection>
}
I've interpreted
based on the ContentView
as cs.ContentView.ContentViewID == someID
This will give you all the ContentSections for a given ContentView. And interpreted
filtered by the DiversionProgram.CrimeNumber
as cs.ContentItems.Where<ContentItem>(ci => ci.DiversionProgram.CrimeNumber == someCrimeNumber)
which will give you all those ContentItems that have a specific CrimeNumber.
Or did you mean something else with based on / filtered by. Maybe OrderBy, or all those ContentSections where Any of it's ContentItems would have a certain CrimeNumber?
You can eager load to get all associated records, but when you want to start filtering/ordering, don't bother with Include.
Just do a projection with anonymous types and EF will work out what it needs to do. It's a bit hairy, but it'll work. If it get's too complicated, bite the bullet and use a SPROC.
Now, with that caveat, something like this (off the top of my head):
var query = ctx.ContentView
.Select(x => new
{
ContentSections = x.ContentSections
.Where(y => y.ContentItems
.Any(z => z.DivisionProgram.CrimeNumber = 87))
}).ToList().Select(x => x.ContentSections);
If you use the CTP5 you can do something very unique it looks like this:
var context = new YourEntitiesContext();
var query = context.ContentView.Include(cs => cs.ContentSections
.Select(ci => ci.ContentItems
.Select(dp => dp.DiversionProgram)
.Where(dp.CrimeNumber == crimeNumber)))
.Where(cv => cv.ContentViewID == contentViewID).FirtsOrDefault();
You can learn more about the CTP5 and how it can be used in Database first scenario here
var query = from t1 in studentManagementEntities.StudentRegistrations
join t2 in studentManagementEntities.StudentMarks
on t1.StudentID equals t2.StudentID
select new
{
t1.selected column name,
t2.selected column name
};