Does anyone know how to pass a managed array to a method and have that
method actually create the array if necessary, ie., if the passed array is
null? For example:
void AddAttribute(XmlAttribute* attribList[], XmlAttribute* anAttrib)
{
if (attribList == 0L) {
attribList = new XmlAttribute * [1];
attribList[0] = anAttrib;
} else {
if (!AttributeExists(attribList, anAttrib)) {
int size = attribList->get_Length();
for (int i=1; i<=size; i++) {
if (attribList[i-1] == 0L) {
attribList[i-1] = anAttrib;
goto Done;
}
}
XmlAttribute* temp[];
temp = new XmlAttribute * [size+1];
attribList->CopyTo(temp, 0);
temp[size] = anAttrib;
attribList = temp;
} else {
throw new ApplicationException("Attribute already exsits");
}
}
Done: ;
}
In the old days of native C++, I would have passed the array as:
XmlAttribute*& attribList so that the function can change the pointer
itself. Thanks. Jon. 6 1576
Hi, Does anyone know how to pass a managed array to a method and have that method actually create the array if necessary, ie., if the passed array is null? For example: void AddAttribute(XmlAttribute* attribList[], XmlAttribute* anAttrib) {
Does the following help?
void AddAttribute(XmlAttribute* (*attribList)[], XmlAttribute* anAttrib)
...
Regards,
Vadim.
It doesn't like when I do:
attribList = new XmlAttribute * [1];
Jon.
"Vadim Melnik" <vm****@REMOVETHISdocsultant.com> wrote in message
news:u6**************@TK2MSFTNGP11.phx.gbl... Hi,
Does anyone know how to pass a managed array to a method and have that method actually create the array if necessary, ie., if the passed array
is null? For example: void AddAttribute(XmlAttribute* attribList[], XmlAttribute* anAttrib) {
Does the following help?
void AddAttribute(XmlAttribute* (*attribList)[], XmlAttribute* anAttrib)
.. Regards, Vadim.
Hi, It doesn't like when I do:
attribList = new XmlAttribute * [1];
The following should work:
void AddAttribute2(XmlAttribute* (*attribList)[], XmlAttribute* anAttrib)
{
*attribList = new XmlAttribute *[2];
....
}
...
Regards,
Vadim.
Jon,
Sure it won't compile, attribList is pointer to array of XmlAttribute*, so
you need dereference it before:
(*attribList)[0] = anAttrib;
"jlea" <jo*@leapsoft.com> wrote in message
news:Oa*************@tk2msftngp13.phx.gbl... Your modified line compiled by the next line didn't:
attribList[0] = anAttrib;
it says
DAL_XML.cpp(377) : error C2440: '=' : cannot convert from 'System::Xml::XmlAttribute __gc *' to 'System::Xml::XmlAttribute __gc * __gc[]'
Jon.
"Vadim Melnik" <vm****@REMOVETHISdocsultant.com> wrote in message news:OG**************@tk2msftngp13.phx.gbl... Hi,
It doesn't like when I do:
attribList = new XmlAttribute * [1];
The following should work:
void AddAttribute2(XmlAttribute* (*attribList)[], XmlAttribute*
anAttrib) { *attribList = new XmlAttribute *[2]; ... }
.. Regards, Vadim.
I got the function to compile - thanks, but now I'm having problems with
passing it the actual array. I'm using the following code:
public System.Xml.XmlAttribute[] AnyAttr;
//the data member is in a C# class
XmlAttribute* attribList[] = pSSConnItemType->AnyAttr; //get the
array from the C# object
AddAttribute(attribList, anAttrib);
//doesn't compile
error C2664: 'void
LeapSoft::DAL_Imp::DAL_XML::AddAttribute(System::X ml::XmlAttribute __gc
*(__gc *) __gc[],System::Xml::XmlAttribute __gc *)' : cannot convert
parameter 1 from 'System::Xml::XmlAttribute __gc * __gc[]' to
'System::Xml::XmlAttribute __gc *(__gc *) __gc[]'
Can only convert a __gc array to or from Object * or Array *
Jon.
"Vadim Melnik" <vm****@REMOVETHISdocsultant.com> wrote in message
news:#w**************@TK2MSFTNGP12.phx.gbl... Jon,
Sure it won't compile, attribList is pointer to array of XmlAttribute*, so you need dereference it before:
(*attribList)[0] = anAttrib;
"jlea" <jo*@leapsoft.com> wrote in message news:Oa*************@tk2msftngp13.phx.gbl... Your modified line compiled by the next line didn't:
attribList[0] = anAttrib;
it says
DAL_XML.cpp(377) : error C2440: '=' : cannot convert from 'System::Xml::XmlAttribute __gc *' to 'System::Xml::XmlAttribute __gc * __gc[]'
Jon.
"Vadim Melnik" <vm****@REMOVETHISdocsultant.com> wrote in message news:OG**************@tk2msftngp13.phx.gbl... Hi,
> It doesn't like when I do: > > attribList = new XmlAttribute * [1]; >
The following should work:
void AddAttribute2(XmlAttribute* (*attribList)[], XmlAttribute* anAttrib) { *attribList = new XmlAttribute *[2]; ... }
.. Regards, Vadim.
Hi Jon,
Add & before attribList:
AddAttribute(&attribList, anAttrib);
P.S.: Probably it does make sense obtain good book about C++ language...
"jlea" <jo*@leapsoft.com> wrote in message
news:uG**************@tk2msftngp13.phx.gbl... I got the function to compile - thanks, but now I'm having problems with passing it the actual array. I'm using the following code:
public System.Xml.XmlAttribute[] AnyAttr; //the data member is in a C# class
XmlAttribute* attribList[] = pSSConnItemType->AnyAttr; //get the array from the C# object AddAttribute(attribList, anAttrib); //doesn't compile
error C2664: 'void LeapSoft::DAL_Imp::DAL_XML::AddAttribute(System::X ml::XmlAttribute __gc *(__gc *) __gc[],System::Xml::XmlAttribute __gc *)' : cannot convert parameter 1 from 'System::Xml::XmlAttribute __gc * __gc[]' to 'System::Xml::XmlAttribute __gc *(__gc *) __gc[]' Can only convert a __gc array to or from Object * or Array *
Jon.
"Vadim Melnik" <vm****@REMOVETHISdocsultant.com> wrote in message news:#w**************@TK2MSFTNGP12.phx.gbl... Jon,
Sure it won't compile, attribList is pointer to array of XmlAttribute*,
so you need dereference it before:
(*attribList)[0] = anAttrib;
"jlea" <jo*@leapsoft.com> wrote in message news:Oa*************@tk2msftngp13.phx.gbl... Your modified line compiled by the next line didn't:
attribList[0] = anAttrib;
it says
DAL_XML.cpp(377) : error C2440: '=' : cannot convert from 'System::Xml::XmlAttribute __gc *' to 'System::Xml::XmlAttribute __gc
* __gc[]'
Jon.
"Vadim Melnik" <vm****@REMOVETHISdocsultant.com> wrote in message news:OG**************@tk2msftngp13.phx.gbl... > Hi, > > > It doesn't like when I do: > > > > attribList = new XmlAttribute * [1]; > > > > The following should work: > > void AddAttribute2(XmlAttribute* (*attribList)[], XmlAttribute* anAttrib) > { > *attribList = new XmlAttribute *[2]; > ... > } > > .. > Regards, > Vadim. > >
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