I am trying to change a struct values (located in class A) from another class (class B per say) I wrote a method to get the struct (the method is located in class A) but all I get is a shallow copy (the values do not really change...) any help?
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1 Answer
Yes, that's what happens with structs. You need to make the changes locally, then shallow copy back again. For example:
public class Foo
{
public Point Location { get; set; }
}
public class Bar
{
private Foo foo = new Foo();
public void MoveFoo()
{
Point location = foo.Location;
location.X += 10;
location.Y += 20;
// Copy it back
foo.Location = location;
}
}
Personally I try to avoid making structs mutable in the first place - but will often given them what I call "pseudo-mutator" methods which return a new value with appropriate changes. So for example, for a Point struct I might have a method like this:
public Point TranslatedBy(int dx, int dy)
{
return new Point(x + dx, y + dy);
}
Then the MoveFoo method above would be:
foo.Location = foo.Location.TranslatedBy(10, 20);
1 Comment
crazyPixel
I ended up using a class instead..It solved the pointers problem plus I might need to add some methods inside so a class will be more appropriate...TNX anyway!