How can be dynamic this query of npoco
![Multi tool use Multi tool use](http://sgv.ssvwv.com/sg/ssvwvcomimagb.png)
Multi tool use
Instead of the adding search method to every class like this;
public List<InvoiceDetail> SearchById(int Id)
{
return db.Query<InvoiceDetail>()
.Where(x => x.Id == Id)
.ToList();
}
How to add a method to base class like this;
public virtual List<T> SearchById(int Id)
{
return db.Query<T>()
.Where(x => x.Id == Id)
.ToList();
}
"T does not contain a definition for Id"
Because Id is the definition of Detail entities.
c# npoco
add a comment |
Instead of the adding search method to every class like this;
public List<InvoiceDetail> SearchById(int Id)
{
return db.Query<InvoiceDetail>()
.Where(x => x.Id == Id)
.ToList();
}
How to add a method to base class like this;
public virtual List<T> SearchById(int Id)
{
return db.Query<T>()
.Where(x => x.Id == Id)
.ToList();
}
"T does not contain a definition for Id"
Because Id is the definition of Detail entities.
c# npoco
1
See : docs.microsoft.com/en-us/dotnet/csharp/programming-guide/… - can you add a base class/interface constraint on allowed type of T
– PaulF
Jan 2 at 11:13
add a comment |
Instead of the adding search method to every class like this;
public List<InvoiceDetail> SearchById(int Id)
{
return db.Query<InvoiceDetail>()
.Where(x => x.Id == Id)
.ToList();
}
How to add a method to base class like this;
public virtual List<T> SearchById(int Id)
{
return db.Query<T>()
.Where(x => x.Id == Id)
.ToList();
}
"T does not contain a definition for Id"
Because Id is the definition of Detail entities.
c# npoco
Instead of the adding search method to every class like this;
public List<InvoiceDetail> SearchById(int Id)
{
return db.Query<InvoiceDetail>()
.Where(x => x.Id == Id)
.ToList();
}
How to add a method to base class like this;
public virtual List<T> SearchById(int Id)
{
return db.Query<T>()
.Where(x => x.Id == Id)
.ToList();
}
"T does not contain a definition for Id"
Because Id is the definition of Detail entities.
c# npoco
c# npoco
edited Jan 2 at 10:59
Crusel
asked Jan 2 at 10:36
![](https://i.stack.imgur.com/tRwo7.png?s=32&g=1)
![](https://i.stack.imgur.com/tRwo7.png?s=32&g=1)
CruselCrusel
82
82
1
See : docs.microsoft.com/en-us/dotnet/csharp/programming-guide/… - can you add a base class/interface constraint on allowed type of T
– PaulF
Jan 2 at 11:13
add a comment |
1
See : docs.microsoft.com/en-us/dotnet/csharp/programming-guide/… - can you add a base class/interface constraint on allowed type of T
– PaulF
Jan 2 at 11:13
1
1
See : docs.microsoft.com/en-us/dotnet/csharp/programming-guide/… - can you add a base class/interface constraint on allowed type of T
– PaulF
Jan 2 at 11:13
See : docs.microsoft.com/en-us/dotnet/csharp/programming-guide/… - can you add a base class/interface constraint on allowed type of T
– PaulF
Jan 2 at 11:13
add a comment |
1 Answer
1
active
oldest
votes
You can achieve this by creating a base class as:
public class BaseEntity
{
public int Id { get; set; }
}
Then make the appropriate entity classes inherit from BaseEntity
as:
public class Detail : BaseEntity
{
//some props for Detail class only
}
Now for your search method you can use the where T : class
constrain as:
public List<T> SearchById<T>(int id) where T : BaseEntity
{
return db.Query<T>()
.Where(x => x.Id == Id)
.ToList();
}
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can achieve this by creating a base class as:
public class BaseEntity
{
public int Id { get; set; }
}
Then make the appropriate entity classes inherit from BaseEntity
as:
public class Detail : BaseEntity
{
//some props for Detail class only
}
Now for your search method you can use the where T : class
constrain as:
public List<T> SearchById<T>(int id) where T : BaseEntity
{
return db.Query<T>()
.Where(x => x.Id == Id)
.ToList();
}
add a comment |
You can achieve this by creating a base class as:
public class BaseEntity
{
public int Id { get; set; }
}
Then make the appropriate entity classes inherit from BaseEntity
as:
public class Detail : BaseEntity
{
//some props for Detail class only
}
Now for your search method you can use the where T : class
constrain as:
public List<T> SearchById<T>(int id) where T : BaseEntity
{
return db.Query<T>()
.Where(x => x.Id == Id)
.ToList();
}
add a comment |
You can achieve this by creating a base class as:
public class BaseEntity
{
public int Id { get; set; }
}
Then make the appropriate entity classes inherit from BaseEntity
as:
public class Detail : BaseEntity
{
//some props for Detail class only
}
Now for your search method you can use the where T : class
constrain as:
public List<T> SearchById<T>(int id) where T : BaseEntity
{
return db.Query<T>()
.Where(x => x.Id == Id)
.ToList();
}
You can achieve this by creating a base class as:
public class BaseEntity
{
public int Id { get; set; }
}
Then make the appropriate entity classes inherit from BaseEntity
as:
public class Detail : BaseEntity
{
//some props for Detail class only
}
Now for your search method you can use the where T : class
constrain as:
public List<T> SearchById<T>(int id) where T : BaseEntity
{
return db.Query<T>()
.Where(x => x.Id == Id)
.ToList();
}
edited Jan 2 at 13:01
answered Jan 2 at 11:28
![](https://i.stack.imgur.com/9ilKH.jpg?s=32&g=1)
![](https://i.stack.imgur.com/9ilKH.jpg?s=32&g=1)
IzzyIzzy
3,96451946
3,96451946
add a comment |
add a comment |
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1
See : docs.microsoft.com/en-us/dotnet/csharp/programming-guide/… - can you add a base class/interface constraint on allowed type of T
– PaulF
Jan 2 at 11:13