Populate a Class using an almost identical class' data
up vote
3
down vote
favorite
I have two classes which should be exactly the same apart from 1 class needed another property.
Instead of re-writing all of the properties twice, I thought of inheriting all of the properties from BaseClass with just the one extra property in MyNewClass
public class BaseClass
{
public int BaseProperty1 { get; set; }
public int BaseProperty2 { get; set; }
public int BaseProperty3 { get; set; }
}
public class MyNewClass: BaseClass
{
public int? ExtraProperty{ get; set; }
}
Since I already fill in all of the details for the original BaseClass in my function, It would be far easier to be able to use this instance of the class to fill in the details of the new instance of MyNewClass.
I hoped it would be as simple as the following, but unfortunately I get the error: System.InvalidCastException: 'Unable to cast object of type 'BaseClass' to type 'MyNewClass'.'
MyNewClass myNewClass= new MyNewClass();
myNewClass = (MyNewClass)baseClass; //baseClass is alread populated at this point
myNewClass.ExtraProperty = 1;
Is there any way to quickly populate a class using another class which has one less property?
I could just set each property individually, but the class which I am using is quite large and it feels like bad practice.
Thanks in advance for any help.
c# asp.net class
add a comment |
up vote
3
down vote
favorite
I have two classes which should be exactly the same apart from 1 class needed another property.
Instead of re-writing all of the properties twice, I thought of inheriting all of the properties from BaseClass with just the one extra property in MyNewClass
public class BaseClass
{
public int BaseProperty1 { get; set; }
public int BaseProperty2 { get; set; }
public int BaseProperty3 { get; set; }
}
public class MyNewClass: BaseClass
{
public int? ExtraProperty{ get; set; }
}
Since I already fill in all of the details for the original BaseClass in my function, It would be far easier to be able to use this instance of the class to fill in the details of the new instance of MyNewClass.
I hoped it would be as simple as the following, but unfortunately I get the error: System.InvalidCastException: 'Unable to cast object of type 'BaseClass' to type 'MyNewClass'.'
MyNewClass myNewClass= new MyNewClass();
myNewClass = (MyNewClass)baseClass; //baseClass is alread populated at this point
myNewClass.ExtraProperty = 1;
Is there any way to quickly populate a class using another class which has one less property?
I could just set each property individually, but the class which I am using is quite large and it feels like bad practice.
Thanks in advance for any help.
c# asp.net class
Possible duplicate of Apply properties values from one object to another of the same type automatically?
– eocron
Nov 21 at 16:48
Hence the name, answers in linked question is type-independand, so you can copy baseClass to myNewClass regardless.
– eocron
Nov 21 at 16:49
PropertyCopy is a handy method, but in the above scenario, i would roll with the constructor solution. It might be more clear / better readable. Also ifMyNewClass
has only one constructor, a developer is forced to use it. ... out before 'opinion based' close votes ;D
– nilsK
Nov 21 at 16:54
See also stackoverflow.com/questions/9885644/…
– Avner Shahar-Kashtan
Nov 21 at 17:28
add a comment |
up vote
3
down vote
favorite
up vote
3
down vote
favorite
I have two classes which should be exactly the same apart from 1 class needed another property.
Instead of re-writing all of the properties twice, I thought of inheriting all of the properties from BaseClass with just the one extra property in MyNewClass
public class BaseClass
{
public int BaseProperty1 { get; set; }
public int BaseProperty2 { get; set; }
public int BaseProperty3 { get; set; }
}
public class MyNewClass: BaseClass
{
public int? ExtraProperty{ get; set; }
}
Since I already fill in all of the details for the original BaseClass in my function, It would be far easier to be able to use this instance of the class to fill in the details of the new instance of MyNewClass.
I hoped it would be as simple as the following, but unfortunately I get the error: System.InvalidCastException: 'Unable to cast object of type 'BaseClass' to type 'MyNewClass'.'
MyNewClass myNewClass= new MyNewClass();
myNewClass = (MyNewClass)baseClass; //baseClass is alread populated at this point
myNewClass.ExtraProperty = 1;
Is there any way to quickly populate a class using another class which has one less property?
I could just set each property individually, but the class which I am using is quite large and it feels like bad practice.
Thanks in advance for any help.
c# asp.net class
I have two classes which should be exactly the same apart from 1 class needed another property.
Instead of re-writing all of the properties twice, I thought of inheriting all of the properties from BaseClass with just the one extra property in MyNewClass
public class BaseClass
{
public int BaseProperty1 { get; set; }
public int BaseProperty2 { get; set; }
public int BaseProperty3 { get; set; }
}
public class MyNewClass: BaseClass
{
public int? ExtraProperty{ get; set; }
}
Since I already fill in all of the details for the original BaseClass in my function, It would be far easier to be able to use this instance of the class to fill in the details of the new instance of MyNewClass.
I hoped it would be as simple as the following, but unfortunately I get the error: System.InvalidCastException: 'Unable to cast object of type 'BaseClass' to type 'MyNewClass'.'
MyNewClass myNewClass= new MyNewClass();
myNewClass = (MyNewClass)baseClass; //baseClass is alread populated at this point
myNewClass.ExtraProperty = 1;
Is there any way to quickly populate a class using another class which has one less property?
I could just set each property individually, but the class which I am using is quite large and it feels like bad practice.
Thanks in advance for any help.
c# asp.net class
c# asp.net class
asked Nov 21 at 16:38
James Tordoff
3261219
3261219
Possible duplicate of Apply properties values from one object to another of the same type automatically?
– eocron
Nov 21 at 16:48
Hence the name, answers in linked question is type-independand, so you can copy baseClass to myNewClass regardless.
– eocron
Nov 21 at 16:49
PropertyCopy is a handy method, but in the above scenario, i would roll with the constructor solution. It might be more clear / better readable. Also ifMyNewClass
has only one constructor, a developer is forced to use it. ... out before 'opinion based' close votes ;D
– nilsK
Nov 21 at 16:54
See also stackoverflow.com/questions/9885644/…
– Avner Shahar-Kashtan
Nov 21 at 17:28
add a comment |
Possible duplicate of Apply properties values from one object to another of the same type automatically?
– eocron
Nov 21 at 16:48
Hence the name, answers in linked question is type-independand, so you can copy baseClass to myNewClass regardless.
– eocron
Nov 21 at 16:49
PropertyCopy is a handy method, but in the above scenario, i would roll with the constructor solution. It might be more clear / better readable. Also ifMyNewClass
has only one constructor, a developer is forced to use it. ... out before 'opinion based' close votes ;D
– nilsK
Nov 21 at 16:54
See also stackoverflow.com/questions/9885644/…
– Avner Shahar-Kashtan
Nov 21 at 17:28
Possible duplicate of Apply properties values from one object to another of the same type automatically?
– eocron
Nov 21 at 16:48
Possible duplicate of Apply properties values from one object to another of the same type automatically?
– eocron
Nov 21 at 16:48
Hence the name, answers in linked question is type-independand, so you can copy baseClass to myNewClass regardless.
– eocron
Nov 21 at 16:49
Hence the name, answers in linked question is type-independand, so you can copy baseClass to myNewClass regardless.
– eocron
Nov 21 at 16:49
PropertyCopy is a handy method, but in the above scenario, i would roll with the constructor solution. It might be more clear / better readable. Also if
MyNewClass
has only one constructor, a developer is forced to use it. ... out before 'opinion based' close votes ;D– nilsK
Nov 21 at 16:54
PropertyCopy is a handy method, but in the above scenario, i would roll with the constructor solution. It might be more clear / better readable. Also if
MyNewClass
has only one constructor, a developer is forced to use it. ... out before 'opinion based' close votes ;D– nilsK
Nov 21 at 16:54
See also stackoverflow.com/questions/9885644/…
– Avner Shahar-Kashtan
Nov 21 at 17:28
See also stackoverflow.com/questions/9885644/…
– Avner Shahar-Kashtan
Nov 21 at 17:28
add a comment |
3 Answers
3
active
oldest
votes
up vote
4
down vote
accepted
Not every fruit is an apple, so from compiler perspective not every BaseClass
is an instance of MyNewClass
hence the cast fails.
There are couple of things you can do. For example use constructor to populate values:
public class MyNewClass : BaseClass
{
public int? ExtraProperty { get; set; }
public MyNewClass(BaseClass baseClass)
{
BaseProperty1 = baseClass.BaseProperty1;
BaseProperty2 = baseClass.BaseProperty2;
BaseProperty3 = baseClass.BaseProperty3;
}
}
Then you can do:
var myNewClass = new MyNewClass(baseClass);
myNewClass.ExtraProperty = 1;
1
I like this and I'm not the one that posted it.
– Jabberwocky
Nov 21 at 17:06
add a comment |
up vote
0
down vote
If you have a lot of properties and don't want manually set every each of them then I suggest you iterate through them like this
public class MyNewClass : BaseClass
{
public MyNewClass(BaseClass seizeProperties)
{
PropertyInfo baseProperties = typeof(BaseClass).GetProperties();
foreach (PropertyInfo property in baseProperties)
{
property.SetValue(this, property.GetValue(seizeProperties));
}
}
public int? ExtraProperty { get; set; }
}
add a comment |
up vote
0
down vote
"I already fill in all of the details for the original BaseClass in my function"
So, if you have func like
void your_func_fill(BaseClass _BaseClass)
you can just call this func with child class object
MyNewClass _MyNewClass;
...
your_func_fill(_MyNewClass)
Good luck!
add a comment |
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
4
down vote
accepted
Not every fruit is an apple, so from compiler perspective not every BaseClass
is an instance of MyNewClass
hence the cast fails.
There are couple of things you can do. For example use constructor to populate values:
public class MyNewClass : BaseClass
{
public int? ExtraProperty { get; set; }
public MyNewClass(BaseClass baseClass)
{
BaseProperty1 = baseClass.BaseProperty1;
BaseProperty2 = baseClass.BaseProperty2;
BaseProperty3 = baseClass.BaseProperty3;
}
}
Then you can do:
var myNewClass = new MyNewClass(baseClass);
myNewClass.ExtraProperty = 1;
1
I like this and I'm not the one that posted it.
– Jabberwocky
Nov 21 at 17:06
add a comment |
up vote
4
down vote
accepted
Not every fruit is an apple, so from compiler perspective not every BaseClass
is an instance of MyNewClass
hence the cast fails.
There are couple of things you can do. For example use constructor to populate values:
public class MyNewClass : BaseClass
{
public int? ExtraProperty { get; set; }
public MyNewClass(BaseClass baseClass)
{
BaseProperty1 = baseClass.BaseProperty1;
BaseProperty2 = baseClass.BaseProperty2;
BaseProperty3 = baseClass.BaseProperty3;
}
}
Then you can do:
var myNewClass = new MyNewClass(baseClass);
myNewClass.ExtraProperty = 1;
1
I like this and I'm not the one that posted it.
– Jabberwocky
Nov 21 at 17:06
add a comment |
up vote
4
down vote
accepted
up vote
4
down vote
accepted
Not every fruit is an apple, so from compiler perspective not every BaseClass
is an instance of MyNewClass
hence the cast fails.
There are couple of things you can do. For example use constructor to populate values:
public class MyNewClass : BaseClass
{
public int? ExtraProperty { get; set; }
public MyNewClass(BaseClass baseClass)
{
BaseProperty1 = baseClass.BaseProperty1;
BaseProperty2 = baseClass.BaseProperty2;
BaseProperty3 = baseClass.BaseProperty3;
}
}
Then you can do:
var myNewClass = new MyNewClass(baseClass);
myNewClass.ExtraProperty = 1;
Not every fruit is an apple, so from compiler perspective not every BaseClass
is an instance of MyNewClass
hence the cast fails.
There are couple of things you can do. For example use constructor to populate values:
public class MyNewClass : BaseClass
{
public int? ExtraProperty { get; set; }
public MyNewClass(BaseClass baseClass)
{
BaseProperty1 = baseClass.BaseProperty1;
BaseProperty2 = baseClass.BaseProperty2;
BaseProperty3 = baseClass.BaseProperty3;
}
}
Then you can do:
var myNewClass = new MyNewClass(baseClass);
myNewClass.ExtraProperty = 1;
edited Nov 22 at 18:18
answered Nov 21 at 16:43
Fabjan
9,37421439
9,37421439
1
I like this and I'm not the one that posted it.
– Jabberwocky
Nov 21 at 17:06
add a comment |
1
I like this and I'm not the one that posted it.
– Jabberwocky
Nov 21 at 17:06
1
1
I like this and I'm not the one that posted it.
– Jabberwocky
Nov 21 at 17:06
I like this and I'm not the one that posted it.
– Jabberwocky
Nov 21 at 17:06
add a comment |
up vote
0
down vote
If you have a lot of properties and don't want manually set every each of them then I suggest you iterate through them like this
public class MyNewClass : BaseClass
{
public MyNewClass(BaseClass seizeProperties)
{
PropertyInfo baseProperties = typeof(BaseClass).GetProperties();
foreach (PropertyInfo property in baseProperties)
{
property.SetValue(this, property.GetValue(seizeProperties));
}
}
public int? ExtraProperty { get; set; }
}
add a comment |
up vote
0
down vote
If you have a lot of properties and don't want manually set every each of them then I suggest you iterate through them like this
public class MyNewClass : BaseClass
{
public MyNewClass(BaseClass seizeProperties)
{
PropertyInfo baseProperties = typeof(BaseClass).GetProperties();
foreach (PropertyInfo property in baseProperties)
{
property.SetValue(this, property.GetValue(seizeProperties));
}
}
public int? ExtraProperty { get; set; }
}
add a comment |
up vote
0
down vote
up vote
0
down vote
If you have a lot of properties and don't want manually set every each of them then I suggest you iterate through them like this
public class MyNewClass : BaseClass
{
public MyNewClass(BaseClass seizeProperties)
{
PropertyInfo baseProperties = typeof(BaseClass).GetProperties();
foreach (PropertyInfo property in baseProperties)
{
property.SetValue(this, property.GetValue(seizeProperties));
}
}
public int? ExtraProperty { get; set; }
}
If you have a lot of properties and don't want manually set every each of them then I suggest you iterate through them like this
public class MyNewClass : BaseClass
{
public MyNewClass(BaseClass seizeProperties)
{
PropertyInfo baseProperties = typeof(BaseClass).GetProperties();
foreach (PropertyInfo property in baseProperties)
{
property.SetValue(this, property.GetValue(seizeProperties));
}
}
public int? ExtraProperty { get; set; }
}
answered Nov 21 at 17:06
Max Jacobi
183
183
add a comment |
add a comment |
up vote
0
down vote
"I already fill in all of the details for the original BaseClass in my function"
So, if you have func like
void your_func_fill(BaseClass _BaseClass)
you can just call this func with child class object
MyNewClass _MyNewClass;
...
your_func_fill(_MyNewClass)
Good luck!
add a comment |
up vote
0
down vote
"I already fill in all of the details for the original BaseClass in my function"
So, if you have func like
void your_func_fill(BaseClass _BaseClass)
you can just call this func with child class object
MyNewClass _MyNewClass;
...
your_func_fill(_MyNewClass)
Good luck!
add a comment |
up vote
0
down vote
up vote
0
down vote
"I already fill in all of the details for the original BaseClass in my function"
So, if you have func like
void your_func_fill(BaseClass _BaseClass)
you can just call this func with child class object
MyNewClass _MyNewClass;
...
your_func_fill(_MyNewClass)
Good luck!
"I already fill in all of the details for the original BaseClass in my function"
So, if you have func like
void your_func_fill(BaseClass _BaseClass)
you can just call this func with child class object
MyNewClass _MyNewClass;
...
your_func_fill(_MyNewClass)
Good luck!
answered Nov 21 at 17:26
AndrewF
333
333
add a comment |
add a comment |
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Possible duplicate of Apply properties values from one object to another of the same type automatically?
– eocron
Nov 21 at 16:48
Hence the name, answers in linked question is type-independand, so you can copy baseClass to myNewClass regardless.
– eocron
Nov 21 at 16:49
PropertyCopy is a handy method, but in the above scenario, i would roll with the constructor solution. It might be more clear / better readable. Also if
MyNewClass
has only one constructor, a developer is forced to use it. ... out before 'opinion based' close votes ;D– nilsK
Nov 21 at 16:54
See also stackoverflow.com/questions/9885644/…
– Avner Shahar-Kashtan
Nov 21 at 17:28