Dynamic arrays

  • Thread starter Thread starter Vannela
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Vannela

How can i achieve the dynamic arrays concept in C#?
I have used the ArrayLists of C# but in few cases it is
failing like when i pass these dynamic arrays a arguments
to functions b'coz in those functions directly i cant
assign the arraylist values to other variables (as they
are objects)

How can i do that?

In unmanaged code it is like this which i want to do it in
c#

My requirement is there is an dynamic array whose values
are assigned based on the requirement like
if an array name array1

it is declared as
int array1[]

array1[0]=2
array1[1]=4
array1[10]=5

then now the size of array is 10
0th value is 2
1st value is 4
2nd to 8th values are assigned as 0's
and 9 th vales is 5

some where in the code i will call a function f1 to which
i will pass the argument the array1
f1(array1[])

How can i achieve this requirement in C#?

Thank you
Vannela
 
If I'm in a scenario like this, I use an ArrayList to build my array, and
when I need to pass it as a parameter (e.g. a "real" array), I use the
ToArray function.

myArrayList.ToArray(typeof(MyType[]))

Jan
 
I used this code but giving error
ArrayList a=new ArrayList();
a.Add(1);
a.Add(2);
int[] aa=(int[])a.ToArray(new Int64().GetType());

Error: Atleast one element in the source array could not
be cast to destinationtype array
-----Original Message-----
If I'm in a scenario like this, I use an ArrayList to build my array, and
when I need to pass it as a parameter (e.g. a "real" array), I use the
ToArray function.

myArrayList.ToArray(typeof(MyType[]))

Jan

How can i achieve the dynamic arrays concept in C#?
I have used the ArrayLists of C# but in few cases it is
failing like when i pass these dynamic arrays a arguments
to functions b'coz in those functions directly i cant
assign the arraylist values to other variables (as they
are objects)

How can i do that?

In unmanaged code it is like this which i want to do it in
c#

My requirement is there is an dynamic array whose values
are assigned based on the requirement like
if an array name array1

it is declared as
int array1[]

array1[0]=2
array1[1]=4
array1[10]=5

then now the size of array is 10
0th value is 2
1st value is 4
2nd to 8th values are assigned as 0's
and 9 th vales is 5

some where in the code i will call a function f1 to which
i will pass the argument the array1
f1(array1[])

How can i achieve this requirement in C#?

Thank you
Vannela
Click to expand...


.
Click to expand...
 
Try this:

ArrayList a=new ArrayList();
a.Add(1);
a.Add(2);
int[] aa=(int[])a.ToArray(typeof(int));


--
Greetz

Jan Tielens
________________________________
Read my weblog: http://weblogs.asp.net/jan


I used this code but giving error
ArrayList a=new ArrayList();
a.Add(1);
a.Add(2);
int[] aa=(int[])a.ToArray(new Int64().GetType());

Error: Atleast one element in the source array could not
be cast to destinationtype array
-----Original Message-----
If I'm in a scenario like this, I use an ArrayList to build my array, and
when I need to pass it as a parameter (e.g. a "real" array), I use the
ToArray function.

myArrayList.ToArray(typeof(MyType[]))

Jan

How can i achieve the dynamic arrays concept in C#?
I have used the ArrayLists of C# but in few cases it is
failing like when i pass these dynamic arrays a arguments
to functions b'coz in those functions directly i cant
assign the arraylist values to other variables (as they
are objects)

How can i do that?

In unmanaged code it is like this which i want to do it in
c#

My requirement is there is an dynamic array whose values
are assigned based on the requirement like
if an array name array1

it is declared as
int array1[]

array1[0]=2
array1[1]=4
array1[10]=5

then now the size of array is 10
0th value is 2
1st value is 4
2nd to 8th values are assigned as 0's
and 9 th vales is 5

some where in the code i will call a function f1 to which
i will pass the argument the array1
f1(array1[])

How can i achieve this requirement in C#?

Thank you
Vannela
Click to expand...


.
Click to expand...
Click to expand...
 
I used this code but giving error
ArrayList a=new ArrayList();
a.Add(1);
a.Add(2);
int[] aa=(int[])a.ToArray(new Int64().GetType());

Error: Atleast one element in the source array could not
be cast to destinationtype array
Click to expand...

Yes, that's because you've added Int32s, not Int64. You might also like
to have a look at the typeof operator - you don't need to create a new
instance of a type to get its Type object.
 
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