Question

I wrote the code below :

1. MyClass[] origArr=new MyClass[3];  
2. MyClass[] arr1;
3. // filled the array with objects and did some work on it .  
4. dgv_1.DataSource=origArr;  
5. 
6. // Here is the problem :
7. arr1=origArr;  
8. // do some work on arr1 ...  
9. dgv_2.DataSource=arr1;  

For some reason the data in ‘origArr’ changed when data in ‘arr1’ change …
I thought that maybe this happened because ‘origArr’ and ‘arr1’ are pointers referring to the same object so I changed line ‘7’ to :

7. origArr.CopyTo(arr1,0);

but it didn’t work … what can i do to make the pointers referring to different objects?

Answer 1

Your line 7 copies the reference to origArr into arr1, so they point to the same physical array.

Even a Clone or CopyTo won’t help much: you will get a copy of the array structure, but in there the references to your oringinal classes are copied. So you end up with a new array with still the same objects.

You will need to Clone your MyClass objects and put those clones into a new array.