I have this:
public class Blah
{
public int id { get; set; }
public string blahh { get; set; }
}
public class Doh
{
public int id { get; set; }
public string dohh { get; set; }
public string mahh { get; set; }
}
public List<???prpClass???> Whatever(string prpClass)
where string prpClass can be "Blah" or "Doh".
I would like the List type to be class Blah or Doh based on what the string prpClass holds.
How can I achieve this?
EDIT:
public List<prpClass??> Whatever(string prpClass)
{
using (var ctx = new ApplicationDbContext())
{
if (prpClass == "Blah")
{
string queryBlah = #"SELECT ... ";
var result = ctx.Database.SqlQuery<Blah>(queryBlah).ToList();
return result;
}
if (prpClass == "Doh")
{
string queryDoh = #"SELECT ... ";
var result = ctx.Database.SqlQuery<Doh>(queryDoh).ToList();
return result;
}
return null
}
}
you have to have a common supertype:
public interface IHaveAnId
{
int id { get;set; }
}
public class Blah : IHaveAnId
{
public int id { get; set; }
public string blahh { get; set; }
}
public class Doh : IHaveAnId
{
public int id {get;set;}
public string dohh { get; set; }
public string mahh { get; set; }
}
then you can do:
public List<IHaveAnId> TheList = new List<IHaveAnId>();
and in some method:
TheList.Add(new Blah{id=1,blahh = "someValue"});
TheList.Add(new Doh{id =2, dohh = "someValue", mahh = "someotherValue"});
to iterate through the list:
foreach(IHaveAnId item in TheList)
{
Console.WriteLine("TheList contains an item with id {0}", item.id);
//item.id is allowed since you access the property of the class over the interface
}
or to iterate through all Blahs:
foreach(Blah item in TheList.OfType<Blah>())
{
Console.WriteLine("TheList contains a Blah with id {0} and blahh ='{1}'", item.id, item.blahh);
}
Edit:
the 2 methods and a int field holding the autovalue:
private int autoValue = 0;
public void AddBlah(string blahh)
{
TheList.Add(new Blah{id = autovalue++, blahh = blahh});
}
public void AddDoh(string dohh, string mahh)
{
TheList.Add(new Doh{id = autovalue++, dohh = dohh, mahh = mahh});
}
Another Edit
public List<object> Whatever(string prpClass)
{
using (var ctx = new ApplicationDbContext())
{
if (prpClass == "Blah")
{
string queryBlah = #"SELECT ... ";
var result = ctx.Database.SqlQuery<Blah>(queryBlah).ToList();
return result.Cast<object>().ToList();
}
if (prpClass == "Doh")
{
string queryDoh = #"SELECT ... ";
var result = ctx.Database.SqlQuery<Doh>(queryDoh).ToList();
return result.Cast<object>.ToList();
}
return null;
}
}
in the view you then have to decide what type it is. In asp.net MVC you can use a display template and use reflection to get a good design. But then i still don't know what technology you are using.
Yet another Edit
TestClass:
public class SomeClass
{
public string Property { get; set; }
}
Repository:
public static class Repository
{
public static List<object> Whatever(string prpClass)
{
switch (prpClass)
{
case "SomeClass":
return new List<SomeClass>()
{
new SomeClass{Property = "somestring"},
new SomeClass{Property = "someOtherString"}
}.Cast<object>().ToList();
default:
return null;
}
}
}
And a controller action in mvc:
public JsonResult Test(string className)
{
return Json(Repository.Whatever("SomeClass"),JsonRequestBehavior.AllowGet);
}
then i called it with: http://localhost:56619/Home/Test?className=SomeClass
And got the result:
[{"Property":"somestring"},{"Property":"someOtherString"}]
Is this what you are trying to do?
public class Blah
{
public int id { get; set; }
public string blahh { get; set; }
}
public class Doh
{
public int id { get; set; }
public string dohh { get; set; }
public string mahh { get; set; }
}
class Program
{
public static List<T> Whatever<T>(int count) where T: new()
{
return Enumerable.Range(0, count).Select((i) => new T()).ToList();
}
static void Main(string[] args)
{
var list=Whatever<Doh>(100);
// list containts 100 of "Doh"
}
}
Related
I have list in class
public List<Igrac> Igraci { get; set; } = new List<Igrac>();
The class:
class Igrac
{
public string Ime { get; set; }
public string Prezime { get; set; }
public string Pozicija { get; set; }
public int Godine { get; set; }
public Igrac(string Ime, string Prezime, string Pozicija, int Godine)
{
this.Ime = Ime;
this.Prezime = Prezime;
this.Pozicija = Pozicija;
this.Godine = Godine;
}
}
Added new list elements:
noviklb.DodavanjeIgraca(new Igrac("Petar", "Petrovic", "Krilo", 1992));
noviklb.DodavanjeIgraca(new Igrac("Badr", "Hari", "Napad", 1993));
The method for adding is working OK. The problem is that when I use Console.WriteLine I get an error like this:
System.Collections.Generic.List`1[zadatak.Program+Igrac]
I Googled and foreach is solution but I cant do it right. Do I need to write foreach as method?
class Igrac
{
public string Ime { get; }
public string Prezime { get; }
public string Pozicija { get; }
public int Godine { get; }
public Igrac(string Ime, string Prezime, string Pozicija, int Godine)
{
this.Ime = Ime;
this.Prezime = Prezime;
this.Pozicija = Pozicija;
this.Godine = Godine;
}
}
public override string ToString()
{
return $"{Ime} {Prezime} {Pozicija} {Godine}";
}
Now you can use.
string myStringDate = new Igrac("Petar", "Petrovic", "Krilo", 1992).ToString();
ALSO NOTE: It would be good to make you properties get only.
Working link:
https://dotnetfiddle.net/zMNiln
use this code:
public void showList(List<Igrac> noviklb)
{
foreach (var item in noviklb)
{
Console.WriteLine("Ime : " + item.Ime);
Console.WriteLine("Prezime : " + item.Prezime);
Console.WriteLine("Pozicija : " + item.Pozicija);
Console.WriteLine("Godine : " + item.Godine);
Console.WriteLine("Get New Record****************** ");
}
}
How do I grab something like Name using the ID?
Code:
//PROPRIEDADES
public int Id
{
get { return id; }
set
{
if (value < 0)
throw new Exception("ID inválido");
id = value;
}
}
public string Username { get; set; }
public string Password { get; set; }
public string Nome_Completo { get; set; }
public string Email { get; set; }
...
CollectionBase:
public string idToName(int id)
{
foreach (Pessoa p in this.List)
{
if (p.Id == id)
{
return p.Nome_Completo;
}
}
return null;
}
Final result:
TABLE A: https://imgur.com/a/NuHG0sN NEED TO GET THE NOME_COMPLETO
TABLE B: https://imgur.com/a/xrf1GAU
Me trying to get the NAME FROM ID:
private void LoadListView()
{
lstvEncomendas.Items.Clear();
foreach (Encomenda en in brain.encomendas)
{
string[] subitems = new string[] { en.Id.ToString(), brain.pessoas.idToName(en.PessoaID)/*en.PessoaID.ToString()*/, en.Morada, en.Telefone, en.Descricao, en.Attachfile.ToString(), en.VoluntarioID.ToString(), en.Estado};
ListViewItem lviItem = new ListViewItem(subitems);
lstvEncomendas.Items.Add(lviItem);
}
}
Trying to populate an ObservableCollection from a database using the Entity Framework. Everything was fine until I started working with linked tables.
I created the DeviceCategory and DeviceComplexity model, and now in the WyeModel I try to integrate them into the DeviceCategoryViewModel. Further, in DeviceCategoryViewModel, I indicated a request for taking information from the database, but I ran into a problem. How to fill in ObservableCollection with this information? I tried different ways, but it didn’t lead to anything, I just got more confused.
DeviceCategoriesViewModel
class DeviceCategoryViewModel
{
TechDContext dc = new TechDContext();
public int Device_category_id { get; set; }
public string Device_category_name { get; set; }
public int Device_complexity_id { get; set; }
public string Device_complexity_name { get; set; }
public static DeviceCategoryViewModel DeviceCaterogyVM(DeviceCategory deviceCategory, DeviceComplexity deviceComplexity)
{
return new DeviceCategoryViewModel
{
Device_category_id = deviceCategory.Device_category_id,
Device_category_name = deviceCategory.Category_name,
Device_complexity_id = deviceCategory.Device_complexity_id,
Device_complexity_name = deviceComplexity.Device_complexity_name
};
}
public void FillDeviceDategories()
{
var q = from cat in dc.DeviceCategories
join com in dc.DeviceComplexities on cat.Device_complexity_id equals com.Device_complexity_id
select new
{
Device_category_id = cat.Device_category_id,
Category_name = cat.Category_name,
Device_complexity_id = com.Device_complexity_id,
Device_complexity_name = com.Device_complexity_name
};
items = q;
deviceCategories = Convert(items);
}
public ObservableCollection<DeviceCategoryViewModel>
Convert(IEnumerable<object> original)
{
return new ObservableCollection<DeviceCategoryViewModel>(original.Cast<DeviceCategoryViewModel>());
}
private IEnumerable<object> items;
public IEnumerable<object> Items
{
get
{
return items;
}
}
private ObservableCollection<DeviceCategoryViewModel> deviceCategories;
public ObservableCollection<DeviceCategoryViewModel> DeviceCategories
{
get
{
FillDeviceDategories();
return deviceCategories;
}
}
DeviceCategory Model
[Table("device_categories")]
public class DeviceCategory
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Device_category_id { get; set; }
public string Category_name { get; set; }
//[ForeignKey]
public int Device_complexity_id { get; set; }
public DeviceCategory()
{
}
public DeviceCategory(string name, int complexity_id)
{
Category_name = name;
Device_complexity_id = complexity_id;
}
}
DeviceCompexity Model
[Table("device_complexities")]
public class DeviceComplexity
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Device_complexity_id { get; set; }
public string Device_complexity_name { get; set; }
public DeviceComplexity()
{
}
public DeviceComplexity(string name)
{
Device_complexity_name = name;
}
}
I now get an error in the conversion method
You'd try to cast your LINQ query result to ObservableCollection<DeviceCategoryViewModel> in separate Convert function.
Why not to directly collect your LINQ query result to ObservableCollection<DeviceCategoryViewModel>
Just use like this
var q = from cat in dc.DeviceCategories
join com in dc.DeviceComplexities on cat.Device_complexity_id equals com.Device_complexity_id
select new DeviceCategoryViewModel // <= Note This Line
{
Device_category_id = cat.Device_category_id,
Category_name = cat.Category_name,
Device_complexity_id = com.Device_complexity_id,
Device_complexity_name = com.Device_complexity_name
};
deviceCategories = new ObservableCollection<DeviceCategoryViewModel>(q);
OR if you want to get result after list then simply use q.ToList()
deviceCategories = new ObservableCollection<DeviceCategoryViewModel>(q.ToList());
I am using the Caliburn.Micro MVVM pattern.
I am writing an application that has 2 DataGrids, one holds a BindableCollection of RepairOrder, the other a BindableCollection WriteOff.
BindableCollection_WriteOff is property of BindableCollection_RepairOrder. (See the below code).
I need to find a way to write all the RepairOrder including the WriteOff associated with each RO. Besides RepairOrder class holding the WriteOff class, the WriteOff class does not have a way to tie the WriteOff to a RepairOrder.
Repair Order Class:
public class RepairOrder
{
public string Schedule { get; set; }
public string ControlNumber { get; set; }
public int Age { get; set; }
public double Value { get; set; }
public string Note { get; set; }
public double OrgValue { get; set; }
private List<WriteOff> _myWriteOffs;
public List<WriteOff> GetMyWriteOffs()
{
return _myWriteOffs;
}
public void AddMyWriteOff(WriteOff value)
{ _myWriteOffs.Add(value); }
public void DeleteMyWriteOff(WriteOff value)
{ _myWriteOffs.Remove(value); }
public RepairOrder(string CN, string SC, double VL)
{
ControlNumber = CN;
Schedule = SC;
Value = Math.Round(VL, 2);
Note = null;
_myWriteOffs = new List<WriteOff>();
}
public RepairOrder()
{
_myWriteOffs = new List<WriteOff>();
}
public static RepairOrder FromCSV(string CSVLine, string Sched)
{
string[] values = CSVLine.Split(',');
RepairOrder rep = new RepairOrder();
rep.ControlNumber = values[2];
rep.Value = Math.Round(double.Parse(values[5]),2);
rep.Age = int.Parse(values[4]);
rep.Schedule = Sched;
return rep;
}
}
Write Off Class:
public class WriteOff
{
private string _store;
public string Account { get; set; }
public string Description { get; set; }
public double WriteOffAmount { get; set; }
public string Schedule { get; set; }
public string Store
{
get {
if (String.IsNullOrEmpty(_store)) return "";
string temp = _store.Substring(0, 3);
return temp;
}
set { _store = value; }
}
public string Note { get; set; }
public WriteOff(string Acct, string Desc, double Amount, string _store)
{
Account = Acct;
Description = Desc;
WriteOffAmount = Amount;
Store = _store;
}
public string GetWOAccount() {
string SchedAccountNumber = "";
//{ "Navistar", "Cummins", "Misc", "Kenworth", "Mack/Volvo" }
switch (Account)
{
case "Navistar":
SchedAccountNumber = "222000";
break;
case "Cummins":
SchedAccountNumber = "223000";
break;
case "Misc":
SchedAccountNumber = "224500";
break;
default:
SchedAccountNumber = "";
break;
}
return SchedAccountNumber;
}
}
In my controller I'm looping through items and saving them to my db. The problem is that it saves the first item, but none of the others. I put a breakpoint on the "SaveItem()" line in the loop and it hits it every time, but what seems odd to me is that it only goes through to the method for the 1st item.
What am I doing wrong?
public void SubmitItem(Cart cart, ShippingDetails shippingDetails, ProcessedItems processedItem, string orderID)
{
var cartItems = cart.Lines;
//CartIndexViewModel cartIndex = new CartIndexViewModel();
//var customID = cartIndex.OrderID;
foreach(var item in cartItems)
{
processedItem.OrderID = orderID;
processedItem.ProductID = item.Product.ProductID;
processedItem.Name = item.Product.Name;
processedItem.Description = item.Product.Description;
processedItem.Price = item.Product.Price;
processedItem.Category = item.Product.Category;
processedItem.ImageName = item.Product.ImageName;
processedItem.Image2Name = item.Product.Image2Name;
processedItem.Image3Name = item.Product.Image3Name;
processedItem.BuyerName = shippingDetails.Name;
processedItem.Line1 = shippingDetails.Line1;
processedItem.Line2 = shippingDetails.Line2;
processedItem.Line3 = shippingDetails.Line3;
processedItem.City = shippingDetails.City;
processedItem.State = shippingDetails.State;
processedItem.Zip = shippingDetails.Zip;
processedItem.Country = shippingDetails.Country;
processedItem.Status = "Submitted";
processedItems.SaveItem(processedItem);
}
}
public class EFProcessedItemsRepository : IProcessedItems
{
private EFDbContext context = new EFDbContext();
public IQueryable<ProcessedItems> ProcessedItem
{
get { return context.ProcessedItems; }
}
public void SaveItem(ProcessedItems processedItem)
{
if(processedItem.ProcessedID == 0)
{
try
{
context.ProcessedItems.Add(processedItem);
context.SaveChanges();
}
catch (Exception)
{
throw;
}
}
else
{
context.Entry(processedItem).State = EntityState.Modified;
}
}
public void DeleteItem(ProcessedItems processedItem)
{
context.ProcessedItems.Remove(processedItem);
context.SaveChanges();
}
}
here is the class for the processedItem:
public class ProcessedItems
{
[Key]
public int ProcessedID { get; set; }
public string OrderID { get; set; }
public int ProductID { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public decimal Price { get; set; }
public string Category { get; set; }
public string ImageName { get; set; }
public string Image2Name { get; set; }
public string Image3Name { get; set; }
public string Status { get; set; }
//shipping
public string BuyerName { get; set; }
public string Line1 { get; set; }
public string Line2 { get; set; }
public string Line3 { get; set; }
public string City { get; set; }
public string State { get; set; }
public string Zip { get; set; }
public string Country { get; set; }
}
Interface:
public interface IProcessedItems
{
IQueryable<ProcessedItems> ProcessedItem { get; }
void SaveItem(ProcessedItems processedItem);
void DeleteItem(ProcessedItems processedItem);
}
try calling context.SaveChanges() after adding all of the items, I think it should persist them all in one go.
Another thing to try:
Refactor your code so that SaveItem accepts only one item to save, Add it and call SaveChanges()
Loop through the cart items outside the method and call the method with one item to save at a time.
// set orderID, shippingDetails above
foreach(var item in cartItems)
{
ProcessedItems processedItem = new ProcessedItems();
processedItem.OrderID = orderID;
processedItem.ProductID = item.Product.ProductID;
processedItem.Name = item.Product.Name;
processedItem.Description = item.Product.Description;
processedItem.Price = item.Product.Price;
processedItem.Category = item.Product.Category;
processedItem.ImageName = item.Product.ImageName;
processedItem.Image2Name = item.Product.Image2Name;
processedItem.Image3Name = item.Product.Image3Name;
processedItem.BuyerName = shippingDetails.Name;
processedItem.Line1 = shippingDetails.Line1;
processedItem.Line2 = shippingDetails.Line2;
processedItem.Line3 = shippingDetails.Line3;
processedItem.City = shippingDetails.City;
processedItem.State = shippingDetails.State;
processedItem.Zip = shippingDetails.Zip;
processedItem.Country = shippingDetails.Country;
SubmitItem(processedItem);
}
public void SubmitItem(ProcessedItems processedItem)
{
processedItem.Status = "Submitted";
processedItems.SaveItem(processedItem);
}
I think it is because processedItem is the same instance for each loop iteration. So after it has been through SaveItem once, it has its ProcessedID set and therefore won't get processed again.
My first guess is that you always store one entity, which is stored in processedItem, which is a input parameter. Try to create new Entity on each loop and then save it. In other words, you assign values to input parameter
processedItem.OrderID = orderID;
and then store same entity each time, but with changed fields
processedItems.SaveItem(processedItem);