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Dynamic Anonymous type in Razor causes RuntimeBinderException
I have this Linq Agregate Query
var GruposQ = from lcGrupos in db.Merlin_ConceptosFacturacion_Kit_Componentes
where lcGrupos.NumIdConcepto == Item.NumIdConcepto & lcGrupos.BitComponenteVariable == true
select lcGrupos;
var GruposList = from comps in GruposQ
group comps by
new
{
NumIdGrupoProducto = comps.NumIdGrupoProducto,
} into g
select new
{
NumIdTransaccion = NumIdTransaccion,
NumIdGrupoProducto = g.Key.NumIdGrupoProducto,
NumCantidad = g.Sum(x=>x.NumCantidad),
Grupo = GruposQ.Where(x => x.NumIdGrupoProducto == g.Key.NumIdGrupoProducto)
};
ViewBag.CompsKit = GruposList.ToList();
My problem is when I try to get elements from ViewBag.CompsKit:
#foreach (var myTrans in ViewBag.CompsKit)
{
// Here it throws an error
// 'object' does not contain a definition for 'NumIdtransaccion'
<span>myTrans.NumIdtransaccion</span>
}
But if i look into this object it allready has the property.
myTrans { NumIdTransaccion = 15460
, NumIdGrupoProducto = 163
, NumCantidad = 100,000
, Grupo = System.Data.Common.Internal.Materialization.CompensatingCollection`1[ParadigmaNet.Areas.Items.Models.Merlin_ConceptosFacturacion_Kit_Componentes] } dynamic {<>f__AnonymousType7<decimal,decimal?,decimal,System.Linq.IQueryable<ParadigmaNet.Areas.Items.Models.Merlin_ConceptosFacturacion_Kit_Componentes>>}
How can I do to access the properties ? in this agregate ?
You can't use "dynamic" type in a Razor View.
You must use a typed object as Model.
You can do grouping and filtering in single query:
var numIdConcepto = Item.NumIdConcepto;
var query = from comps in db.Merlin_ConceptosFacturacion_Kit_Componentes
where comps.NumIdConcepto == numIdConcepto &&
comps.BitComponenteVariable
group comps by comps.NumIdGrupoProducto into g
select new
{
NumIdGrupoProducto = g.Key,
NumCantidad = g.Sum(x => x.NumCantidad),
Grupo = g.ToList()
};
ViewBag.CompsKit = query.ToList();
ViewBag.NumIdTransaccion = NumIdTransaccion;
Also
you don't need create anonymous object for grouping by single property
you don't need to compare boolean values with true/false
you can simply use g.Key when use single property for grouping
items in group already will have NumIdGrupoProducto equal to grouping key
Instead of assigning same NumIdTransaccion to each group in the query result, pass that value to view separately: ViewBag.NumIdTransaccion = NumIdTransaccion
View:
<span>ViewBag.NumIdTransaccion</span>
#foreach(var item in ViewBag.CompsKit)
{
<span>#item.NumIdGrupoProducto</span>
<span>#item.NumCantidad</span>
}
Consider also creating ViewModel for this view - thus you will be safe about typos and all such errors will be eliminated at compile time.
Related
I have a TABLE in SQL Database there is a columns in
TABLE ID,Subject,Body,Status,TimeDate in the 400 row data and each i have take a Id as a P_Key and Identity Specification is Yes.
Here is Id = 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 etc..
I want to select greater Id from table based on saved old id like i have saved ID 12 in im getting same id like this with Linq Query below:
public static int CheckId()
{
DataClassesDataContext con = new DataClassesDataContext(Globals.con);
var q = from v in con.TABLE
where v.Id== 12 & v.Status == Active
select v.Id;
foreach (var val in q)
{
return Convert.ToInt32(val);
}
return 0;
}
the i can return a greater id then 12. and there is also one issue. if there is greater ID is Missing from DB example Id 13 is missing then i will get Id 14 in that case. please let me know how can i get id like this i want from db using linq query.
Use Min
return con.<TABLE>
.Where(v=>v.ID > 12)
.Select(v=>v.ID)
.DefaultIfEmpty()
.Min();
I made a sample for you
List<Int32> test = new List<Int32>{1,2,3,4,5,6,7,8,9,10,11,12,14,13,15,16};
var min = test.Where(x=>x>12).Min();
Gives result 13 only, even when 14 is the first bigger
In Your case
//get a table object
Table table = new Table() //if you want whole row.
table = con.Table.Where(x=>x.id>12).MIN();
Based on the code you already have:
DataClassesDataContext con = new DataClassesDataContext(Globals.con);
var q = from v in con.TABLE
where v.Id > 12 & v.Status == Active
orderby v.Id
select v.Id;
return q.Take(1); // to return the whole row
// or
return q.Take(1).Id; // to return only the Id
This would return the first row meeting the criterias (id > 12, status = active). Add error handling code as needed.
Hi Need some help with LINQ query.
I have entity called Shift. This entity has several value field but the ones I am intressted in are ShiftID (int), ShiftDate (DateTime) and GrossMount (decimal(10,2). And this needs to be grouped by month (binding this to a graph in ASP.NET).
I need data for the last 12 months grouped by month.
I have come a bit on the way with this post: Linq to Entity, selecting group without value but not quite all the way.
This is my code for now:
public IQueryable<Shift> GetPastMonths(int months, string accountNumber)
{
_context = new EtaxiEnteties();
var _date = DateTime.Today;
var _firstOfMonth = new DateTime(_date.Year, _date.Month, 31);
var _twelveMonthAgoFirstOfMonth = _firstOfMonth.AddMonths(-12);
// Generate a collection of the months and years for the last 12 months
var _monthYears = Enumerable.Range(-12, 12).Select(monthOffset => { var monthDate = _firstOfMonth.AddMonths(monthOffset); return new { y = monthDate.Year, m = monthDate.Month }; });
var _data = (from _monthYear in _monthYears
join _i in
(from _i in _context.Shifts.Where(acc => acc.Account.AccountNumber == accountNumber)
where _i.ShiftDate >= _twelveMonthAgoFirstOfMonth && _i.ShiftDate < _firstOfMonth
group _i by new { y = _i.ShiftDate.Year, m = _i.ShiftDate.Month } into g
select new { ShiftID = g.Key, GrossAmount = g.Count() }) on _monthYear equals _i.ShiftID into j
from _k in j.DefaultIfEmpty()
select new Shift() { ShiftDate = new DateTime(_monthYear.y, _monthYear.m, 1), GrossAmount = _k != null ? _k.GrossAmount : 0 });
return _data as IQueryable<Shift>;
}
Now I have in return a collection of Shift objects, grouped by month but still missing the GrossAmount. Althoug i would need this from today date (only getting from 1 of current month).
Believe this is my main problem: GrossAmount = g.Count(), but I am not sure
Any LINQ specialist out there that could give me a push?
Use GrossAmount = g.Sum(x => x.GrossAmount) to calculate total GrossAmount value of grouped Shift entities. I believe you have typo in GrossAmount (GrossMount) property name.
I have some data in an ArrayList and I would like to use that to filter my Linq query using the where clause.
My Linq code below joins two tables and then I filter them using the Where clause. Now I would like to FURTHER filter this query by using the Arraylist as a filter. So the value come from arraylist
I would like the "where" clause to take one more comparison and the value comes from an arraylist:
where rType.Field<string>("ProfSSCMName") == lbProfiles.SelectedValue && rType.Field<string>("Name") == lbHWTypes.SelectedValue && **arrayList.Tostring()**
This is the code that I am using.
Can anyone tell me how can I further filter my Linq query using the values in the arraylist?
joined = from rType in ds.Tables["HWTypes"].AsEnumerable()
join rStock in ds.Tables["Stock"].AsEnumerable()
on rType.Field<string>("ProductID") equals rStock.Field<string>("Partno")
where rType.Field<string>("ProfSSCMName") == lbProfiles.SelectedValue && rType.Field<string>("Name") == lbHWTypes.SelectedValue
select new
{
TagNumber = rStock.Field<string>("TagNumber"),
SerialNumber = rStock.Field<string>("SerialNumber"),
Partno = rStock.Field<string>("Partno"),
PartType = rStock.Field<string>("PartType"),
EcopartSubtype = rStock.Field<string>("EcopartSubtype"),
AzertyQuerty = rStock.Field<string>("Azerty/Querty"),
ProductID = rType.Field<string>("ProductID"),
Name = rType.Field<string>("Name"),
SCCMKeyboard = rType.Field<string>("SCCMKeyboard"),
DisplayName = rType.Field<string>("DisplayName"),
ProfSSCMName = rType.Field<string>("ProfSSCMName"),
TagNameDisplayName = rStock.Field<string>("TagNumber") + " " + rType.Field<string>("DisplayName")
// add the other columns you need here
};
You seem to be using Linq-To-Objects.
So you can just use contains on the arraylist
where rType.Field<string>("ProfSSCMName") == lbProfiles.SelectedValue
&& rType.Field<string>("Name") == lbHWTypes.SelectedValue
&& arrayList.Contains( rType.Field<string>("Name") )
I'm new to linq.
In c# I'm doing as follows to get the count of one column.
SELECT DispatcherName,
ActivityType,
CONVERT(BIGINT,COUNT(ActivityType)) AS Total
FROM ACTIVITYLOG
GROUP BY DispatcherName,
ActivityType
ORDER BY Total DESC
Can any one tell m,how I can achieve the same thing using LINQ.
Update:
HI I did as follows and got the reslut.
But I'm not able to convert result to datatable.
this is how I did.
here dt is datatabe with two columns Dispatchername and ActivityType.
var query1 = from p in dt.AsEnumerable()
group p by new
{
DispatcherName = p.Field<string>("Dispatchername"),
Activity = p.Field<string>("ActivityType"),
}
into pgroup
let count = pgroup.Count()
orderby count
select new
{
Count = count,
DispatcherName = pgroup.Key.DispatcherName,
Activity = pgroup.Key.Activity
};
pls help me out asap.
from c in ACTIVITYLOG
group c by new {c.DispatcherName, c.ActivityType} into g
orderby g.Count() descending
select new { g.Key.DispatcherName, g.Key.ActivityType, Total = g.Count() }
If you want your results returned back to a DataTable, one option is to use the CopyToDataTable method.
Here's a live example: http://rextester.com/XHX48973
This method basically requires you to create a dummy table in order to use its NewRow method - the only way to create a DataRow, which is required by CopyToDataTable.
var result = dt.AsEnumerable()
.GroupBy(p => new {
DispatcherName = p.Field<string>("DispatcherName"),
Activity = p.Field<string>("ActivityType")})
.Select(p => {
var row = dummy.NewRow();
row["Activity"] = p.Key.Activity;
row["DispatcherName"] = p.Key.DispatcherName;
row["Count"] = p.Count();
return row;
})
.CopyToDataTable();
Perhaps a better way might be just fill in the rows directly, by converting to a List<T> and then using ForEach.
DataTable dummy = new DataTable();
dummy.Columns.Add("DispatcherName",typeof(string));
dummy.Columns.Add("Activity",typeof(string));
dummy.Columns.Add("Count",typeof(int));
dt.AsEnumerable()
.GroupBy(p => new { DispatcherName = p.Field<string>("DispatcherName"),
Activity = p.Field<string>("ActivityType")})
.ToList()
.ForEach(p => {
var row = dummy.NewRow();
row["Activity"] = p.Key.Activity;
row["DispatcherName"] = p.Key.DispatcherName;
row["Count"] = p.Count();
dummy.Rows.Add(row);
});
Live example: http://rextester.com/TFZNEO48009
This should do the trick:
IList<ACTIVITYLOG> allActivityLogs;
var result = (from c in allActivityLogs
select new
{
DispatcherName = c.DispatcherName,
ActivityType = c.ActivityType,
Total = c.ActivityType.Count
}).OrderByDescending(x => x.Total)
.GroupBy(x => new { x.DispatcherName, x.ActivityType });
You only need to substitute the allActivityLogs collection with the actual collection of your entities.
I have been working on sorting Arraycollection like ascending , descending the numeric list. Total length of my collection will go up to 100. Now I want to preform sort to nested data like this
Data Structure
Name : String
Categories : Array ["A","x or y or z","C"]
Categories array will have maximum 3 items , out of that three items the second item can have 3 different values either X or Y or Z. My result data looks like here
{"Mike" , ["A","x","C"]}
{"Tim" , ["A","y","C"]}
{"Bob" , ["A","x","C"]}
{"Mark" , ["A","z","C"]}
{"Peter" , ["A","z","C"]}
{"Sam" , ["A","y","C"]}
anyone please explain how to sort this type of data in a way showing all "x" first , "y" next and "z" at the last and vice a versa. Any help is really appreciated. Thanks Anandh. .
You can specify a compare function in your SortField like this:
var sortfield:SortField = new SortField("Categories");
sortfield.compareFunction = myCompare;
var sort:Sort = new Sort();
sort.fields = [sortfield];
yourCollection.sort = sort;
and your compare function:
function myCompare(a:Object, b:Object):int {
/*
return -1, if a before b
return 1, if b before a
return 0, otherwise
*/
}
or something like that.. and it's untested code :)
I have created a new property to the data structure called categoryOrder In the setter I did the following and Am using the categoryOrder for sorting - sortBy = categoryOrder;. I understand little hard coding is needed but still I believe this will reduce the number of comparisons when I use compareFunction. Anyone please valid this idea. Thanks!
public function set categories(data:ArrayCollection) :void
{
if(data != null)
{
_categories = data;
for each(var categorie:Object in data)
{
switch(categorie.categoryName)
{
case "x":{categoryOrder = 1;break;}
case "y":{categoryOrder = 2;break;}
case "z":{categoryOrder = 3;break;}
}
}
}
}
Data Structure
Name : String
Categories : Array ["A","x or y or z","C"]
categoryOrder : Number