What is the C# equivalent of this C structure?

Question

3.00/5 (1 vote)

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Hi all, I'm wondering if you could help me.

I want to know how to write the C# equivalent, or a better way of writing of the following c structure.

struct SoftwareLayer
{
  char* swSrcPathsBufferPtr;
  char* utCtrPathsBufferPtr;
  char* swSrcFileNameBufferPtr;
  char* utCtrFileNameBufferPtr;
  unsigned int foo;
  unsigned int bah;
};

I want to make use of a List in C#, so typically the C# code should look like something like this:
E.g

public unsafe struct SoftwareLayer
{
  List<string> *swSrcPathBufferPtr;
  List<string> *utCtrPathsBufferPtr;
  List<string> *swStrFileNameBufferPtr;
  List<string> *utCtrFileNameBufferPtr;
  uint foo;
  uint bah;
};</string></string></string></string>

I'm getting the following problem: "Cannot take the address of, get the size of, or declare a pointer to a managed type ('System.Collections.Generic.List<string></string>')"

Question:
How would one define a structure to have a member that points to a List?
Your help would be appreciated, thx.

Regards, :)
Rudolf

Posted 7-Nov-10 21:36pm

R. Erasmus

Updated 7-Nov-10 22:01pm

Hiren solanki

v3

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Comments

Radhakrishnan G. 8-Nov-10 4:39am

struct is a value type in C#, so it is better to use value types in it, List is a managed type(Systems.Collections.List)??

R. Erasmus 8-Nov-10 6:49am

better however I'm sure not impossible. I've decided on a different approach altogether. Thx for the help.

2 solutions

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JeremH · Accepted Answer · 2010-11-07T22:02:00

Solution 2

Hi,

C#

public struct SoftwareLayer
{
public List<char> swSrcPathBufferPtr;
public List<char> utCtrPathsBufferPtr;
public List<char> swStrFileNameBufferPtr;
public List<char> utCtrFileNameBufferPtr;
public uint foo;
public uint bah;
}

jerem

Posted 7-Nov-10 22:02pm

JeremH

Updated 8-Nov-10 7:01am

v2

E.F. Nijboer · Accepted Answer · 2010-11-07T22:10:00

Have a look here:
http://www.developerfusion.com/article/84519/mastering-structs-in-c/[^]

The list is a generic type for objects and since a struct is a value type the compiler isn't all that happy about it. Also, the ArrayList would be inefficient to use because it would do boxing and unboxing, which will give you a performance hit. A solution could be to wrap the struct in a class for storage. The class can expose the struct as a property and also make the values accessible using properties. This makes accessing is more easy and you can use that class with the generic list.

Good luck!