SafeArray!

[amber1111]

I have this method from an ocx that is expecting safearray object as arguments

ocx.GetData(ref object ySafeArray, ref object xSafeArray, ref int pts, ref double xbeg, ref double xend);

How do I create a SafeArray object in C#? I did something like this...but that does not seem to work

object yArray = new object();
object xArray = new object();

Thanks

 

[JurkMonkey]

You have to find out what the structure of their SafeArray is or use the safe array provided by them.

YourOCXNamespace.SafeArray xarray = new YourOCXNamespace.SafeArray();

YourOCXNamespace.SafeArray yarray = new YourOCXNamespace.SafeArray();

int pts = 0;
double xbeg = 0.0;
double xend = 0.0;

ocx.GetData(ref yarray, ref xarray, ref pts, ref xbeg, ref xend);

 

[amber1111]

JurMonkey,

I am not sure I understand what you're saying....

pay attention to the first argument of the method ...it expecting a "ref object SafeArray".

Thanks

 

[JurkMonkey]

right, but you will have to convert that object to something in order to use it. Find out what kind of class or structure they are asking for in that call.

 

[amber1111]

JurkMonkey,

For the sake of argument, let's say I want to convert the object to double or array of double...How do I do that?

Thanks

 

[JurkMonkey]

Where did this ocx come from? What are they doing with that object that you are sending in?

Typically, you send in an "object" and the ocx casts it to a specific type - sets some values - and returns it to you.

for example:

//This is the structure called SomeType which is an "object"
public struct SomeType
{
public int quantity;
public double price;
}

//In the ocx file
public void GetData(ref object something)
{
SomeType st = (SomeType)something;

st.quantity = 10;
st.price = 19.99;
}


//and in your code you would have
public double GetPrice()
{
SomeType s = new SomeType();

ocx.GetData((object)s);

return s.price;
}


So you really have to know what it is they are expecting you to pass in because "object" is only a base class.

 

[amber1111]

JurkMonkey,

Thanks for the help...