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I want to read from C# an array of strings from a COM object.

I want to read from C# an array of strings from a COM object.

I can read easily an array of longs from the COM object as follows

IDL declaration:
HRESULT GetLongArray([out] SAFEARRAY(long) *LongArray);

C# code:
int[] intarray;
ComObject. GetLongArray (out intarray);

However, the equivalent code for strings does not work

IDL declaration:
HRESULT GetStringArray([out] SAFEARRAY(BSTR) *StringArray);

C# code:
string[] stringarray;
ComObject. GetStringArray (out stringarray);

The code compiles but gives the following run time error:
"Object reference not set to an instance of an object."

The problem is all in the C# part. The COM object does not even get
called.

Nov 16 '05 #1
0 888

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