Problem returning a collection of a class from a DLL to a client app

[rbeyea]

I am writing a DLL (DLL1) that is wrapping another DLL (DLL2). I need to
extract the information returned from DLL2 and pass it out to the Client
application this is using DLL1.

DLL2 returns data that I would like to return through DLL1 as a collection
so the user can use foreach (lookup li in _myAdapter.lookupInfoCol) and get
the li.JID and li.MailAddr1 data from the returned collection.

The data is in the collection and I think it is getting returned to the Client.
But I am getting a messages:
1. C:\Develop\CSharp\TestJuryWrapper\JPNGDNAPI\myCons ole\myConsole.cs(25):
'myConsoleNS.myConsole._myAdapter' denotes a 'field' where a 'class' was
expected
and
2. C:\Develop\CSharp\TestJuryWrapper\JPNGDNAPI\myCons ole\myConsole.cs(26):
The type or namespace name 'lookup' could not be found (are you missing a
using directive or an assembly reference?)

Any and all helps is extremely appreciated.
Thanks in advance,
rich

when trying to compile. Below is the code.

-> JSIAccessAdapter.cs

using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Reflection;
using System.IO;
using System.Collections;

namespace JPNGDNAPI
{

/// <summary>
/// JSIAccessAdapter is the base for the Jury Systems, inc wrapper..
/// </summary>
public class JSIAccessAdapter
{

// strings for communication with cobol dll
private string _ctlArea;
private string _reqArea;
private string _commArea;

// Declare the Classes for access.
private LookupInfo _LookupInfo;
private LookupInfoCol _LookupInfoCol;

public JSIAccessAdapter()
{

}

public LookupInfoCol GetJurorLookup(string LastName, string FirstName,
string DOB)
{

string spaces = new String(' ', 100);
StringBuilder sb = new StringBuilder(213, 213);

// Set up the Ctl Area.
sb.Append("00000000000000000000000000000");
sb.Append(spaces);
_ctlArea = sb.ToString();

StringBuilder sbReq = new StringBuilder(43, 43);

sbReq.Append(LastName);
sbReq.Append(FirstName);
sbReq.Append(DOB);

_reqArea = sbReq.ToString();

_commArea = new String(' ', 4096);

// CallCobolRoutine(_commArea, _ctlArea, _reqArea);

// Instantiate the identityInfo class with the CommArea
// This will extract CommArea into the individual fields.
LookupInfoCol lookupInfoCol = new LookupInfoCol(_commArea);

return lookupInfoCol;

}
public LookupInfo lookupInfo
{
get
{
return _LookupInfo;
}
set
{
_LookupInfo = value;
}
}

public LookupInfoCol lookupInfoCol
{
get
{
return _LookupInfoCol;
}
set
{
_LookupInfoCol = value;
}
}

}
}

-> LookupInfo.cs

using System;

namespace JPNGDNAPI
{
/// <summary>
/// Summary description for LookupInfo.
/// </summary>
public class LookupInfo
{

private string _JID ;
private string _MailAddr1 ;

// // Constructor
// public LookupInfo()
// {
// }
//
// public LookupInfo(string JID, string MailAddr1)
// {
// this.JID = JID;
// this.MailAddr1 = MailAddr1;
// }

public string JID
{
get
{
return _JID;
}
set
{
_JID = value;
}
}

public string MailAddr1
{
get
{
return _MailAddr1;
}
set
{
_MailAddr1 = value;
}
}
}
}

->LookupInfoCol.cs

using System;
using System.Collections;

namespace JPNGDNAPI
{
/// <summary>
/// Summary description for LookupInfo.
/// </summary>
public class LookupInfoCol : ArrayList
{

const int C_MaxInfoItems = 15;

private ArrayList _LookupInfoCollection = new ArrayList();

private LookupInfo _LookupInfo = new LookupInfo();

// Constructor
public LookupInfoCol(String commArea)
{
ExtractLookupInfo(commArea);
}

private void ExtractLookupInfo(string commArea)
{

int j = 0; // JID - Starting Location in Comm Area
int k = 135; // Mail Address 1 - Starting Location in Comm Area
for (int i = 0; i < C_MaxInfoItems; i++)
{
if(commArea.Substring(j, 9) != "000000000")
{
lookupInfo = new LookupInfo();

_LookupInfo.JID = commArea.Substring(j, 9);
_LookupInfo.MailAddr1 = commArea.Substring(k, 30);

// LookupInfo lookupInfo = new LookupInfo(commArea.Substring(j, 9),
commArea.Substring(k, 30));
j += 9;
k += 30;

_LookupInfoCollection.Add(lookupInfo);
}

}

}
public LookupInfo lookupInfo
{

get
{
return _LookupInfo;
}
set
{
_LookupInfo = value;
}
}

}
}

-> MyConsole.cs - Client Console App.

using System;
using JPNGDNAPI;

namespace myConsoleNS
{
/// <summary>
/// Summary description for Class1.
/// </summary>
class myConsole
{

private JSIAccessAdapter _myAdapter = new JSIAccessAdapter();

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main(string[] args)
{
// Get access to the .Net Adapter
JSIAccessAdapter _myAdapter = new JSIAccessAdapter();

_myAdapter.lookupInfoCol = _myAdapter.GetJurorLookup("Hartquist", "Barbara",
"19411111");
-----------------------------> Message 1 appears for this line below.
_myAdapter.lookupInfoCol.lookupInfo lookup = _myAdapter.lookupInfo();

-----------------------------> Message 2 appears for the line below. Because
the line above is failing.
foreach (lookup li in _myAdapter.lookupInfoCol)
{
Console.WriteLine("JID = " + li.JID);
Console.WriteLine("JID = " + li.MailAddr1);
}
}
}
}

[Mark R. Dawson]

Hi rbeyea,

1. C:\Develop\CSharp\TestJuryWrapper\JPNGDNAPI\myCons ole\myConsole.cs(25):
'myConsoleNS.myConsole._myAdapter' denotes a 'field' where a 'class' was
I believe is because in your Main method you have the following line:

_myAdapter.lookupInfoCol.lookupInfo lookup = _myAdapter.lookupInfo();

You are trying to declare an object, but instead of declaring it of type
LookupInfo (take notice of your capitalization) you have tried to use a field
in the object called lookupinfo. What you should have said is:

JPNGDNAPI.LookupInfo lookup = _myAdapter.lookupInfo;

notice that it is _myAdapter.lookupInfo because it is a property not
_myAdapter.lookupInfo() which it would be if that was a method.

Hope that helps
Mark R Dawson
http://www.markdawson.org

"rbeyea" wrote:


I am writing a DLL (DLL1) that is wrapping another DLL (DLL2). I need to
extract the information returned from DLL2 and pass it out to the Client
application this is using DLL1.

DLL2 returns data that I would like to return through DLL1 as a collection
so the user can use foreach (lookup li in _myAdapter.lookupInfoCol) and get
the li.JID and li.MailAddr1 data from the returned collection.

The data is in the collection and I think it is getting returned to the Client.
But I am getting a messages:
1. C:\Develop\CSharp\TestJuryWrapper\JPNGDNAPI\myCons ole\myConsole.cs(25):
'myConsoleNS.myConsole._myAdapter' denotes a 'field' where a 'class' was
expected
and
2. C:\Develop\CSharp\TestJuryWrapper\JPNGDNAPI\myCons ole\myConsole.cs(26):
The type or namespace name 'lookup' could not be found (are you missing a
using directive or an assembly reference?)

Any and all helps is extremely appreciated.
Thanks in advance,
rich

when trying to compile. Below is the code.

-> JSIAccessAdapter.cs

using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Reflection;
using System.IO;
using System.Collections;

namespace JPNGDNAPI
{

/// <summary>
/// JSIAccessAdapter is the base for the Jury Systems, inc wrapper..
/// </summary>
public class JSIAccessAdapter
{

// strings for communication with cobol dll
private string _ctlArea;
private string _reqArea;
private string _commArea;

// Declare the Classes for access.
private LookupInfo _LookupInfo;
private LookupInfoCol _LookupInfoCol;

public JSIAccessAdapter()
{

}

public LookupInfoCol GetJurorLookup(string LastName, string FirstName,
string DOB)
{

string spaces = new String(' ', 100);
StringBuilder sb = new StringBuilder(213, 213);

// Set up the Ctl Area.
sb.Append("00000000000000000000000000000");
sb.Append(spaces);
_ctlArea = sb.ToString();

StringBuilder sbReq = new StringBuilder(43, 43);

sbReq.Append(LastName);
sbReq.Append(FirstName);
sbReq.Append(DOB);

_reqArea = sbReq.ToString();

_commArea = new String(' ', 4096);

// CallCobolRoutine(_commArea, _ctlArea, _reqArea);

// Instantiate the identityInfo class with the CommArea
// This will extract CommArea into the individual fields.
LookupInfoCol lookupInfoCol = new LookupInfoCol(_commArea);

return lookupInfoCol;

}
public LookupInfo lookupInfo
{
get
{
return _LookupInfo;
}
set
{
_LookupInfo = value;
}
}

public LookupInfoCol lookupInfoCol
{
get
{
return _LookupInfoCol;
}
set
{
_LookupInfoCol = value;
}
}

}
}

-> LookupInfo.cs

using System;

namespace JPNGDNAPI
{
/// <summary>
/// Summary description for LookupInfo.
/// </summary>
public class LookupInfo
{

private string _JID ;
private string _MailAddr1 ;

// // Constructor
// public LookupInfo()
// {
// }
//
// public LookupInfo(string JID, string MailAddr1)
// {
// this.JID = JID;
// this.MailAddr1 = MailAddr1;
// }

public string JID
{
get
{
return _JID;
}
set
{
_JID = value;
}
}

public string MailAddr1
{
get
{
return _MailAddr1;
}
set
{
_MailAddr1 = value;
}
}
}
}

->LookupInfoCol.cs

using System;
using System.Collections;

namespace JPNGDNAPI
{
/// <summary>
/// Summary description for LookupInfo.
/// </summary>
public class LookupInfoCol : ArrayList
{

const int C_MaxInfoItems = 15;

private ArrayList _LookupInfoCollection = new ArrayList();

private LookupInfo _LookupInfo = new LookupInfo();

// Constructor
public LookupInfoCol(String commArea)
{
ExtractLookupInfo(commArea);
}

private void ExtractLookupInfo(string commArea)
{

int j = 0; // JID - Starting Location in Comm Area
int k = 135; // Mail Address 1 - Starting Location in Comm Area
for (int i = 0; i < C_MaxInfoItems; i++)
{
if(commArea.Substring(j, 9) != "000000000")
{
lookupInfo = new LookupInfo();

_LookupInfo.JID = commArea.Substring(j, 9);
_LookupInfo.MailAddr1 = commArea.Substring(k, 30);

// LookupInfo lookupInfo = new LookupInfo(commArea.Substring(j, 9),
commArea.Substring(k, 30));
j += 9;
k += 30;

_LookupInfoCollection.Add(lookupInfo);
}

}

}
public LookupInfo lookupInfo
{

get
{
return _LookupInfo;
}
set
{
_LookupInfo = value;
}
}

}
}

-> MyConsole.cs - Client Console App.

using System;
using JPNGDNAPI;

namespace myConsoleNS
{
/// <summary>
/// Summary description for Class1.
/// </summary>
class myConsole
{

private JSIAccessAdapter _myAdapter = new JSIAccessAdapter();

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main(string[] args)
{
// Get access to the .Net Adapter
JSIAccessAdapter _myAdapter = new JSIAccessAdapter();

_myAdapter.lookupInfoCol = _myAdapter.GetJurorLookup("Hartquist", "Barbara",
"19411111");
-----------------------------> Message 1 appears for this line below.
_myAdapter.lookupInfoCol.lookupInfo lookup = _myAdapter.lookupInfo();

-----------------------------> Message 2 appears for the line below. Because
the line above is failing.
foreach (lookup li in _myAdapter.lookupInfoCol)
{
Console.WriteLine("JID = " + li.JID);
Console.WriteLine("JID = " + li.MailAddr1);
}
}
}
}

[rbeyea]

Hello Mark,

Thanks! I did as you suggested and did not get message 1 again. But when
I try to reference lookup in a Foreach I get:
C:\Develop\CSharp\JuryWrapper\JPNGDNAPI\WindowsApp lication1\JPNGDNAPIClient.cs(575):
The type or namespace name 'lookup' could not be found (are you missing a
using directive or an assembly reference?)

It seems like it is out of scope. But I don't understand what it is doing.

// I have a using for JPNGDNAPI so
it is not needed below.
LookupInfo lookup = _myAdapter.lookupInfo;

// "lookup" gets squigled and gets
the above error message.
foreach (lookup li in _myAdapter.lookupInfoCol)
{
lbOutput.Items.Add("JID = " + li.JID);
}

What is really weird is if I try to reference "lookup" it has a JID property
(which i would expect). I must be missing something completely obvious!

Thanks in advance!

rich

Hi rbeyea,

1.
C:\Develop\CSharp\TestJuryWrapper\JPNGDNAPI\myCons ole\myConsole.cs(25
): 'myConsoleNS.myConsole._myAdapter' denotes a 'field' where a
'class' was

I believe is because in your Main method you have the following line:

_myAdapter.lookupInfoCol.lookupInfo lookup = _myAdapter.lookupInfo();

You are trying to declare an object, but instead of declaring it of
type LookupInfo (take notice of your capitalization) you have tried to
use a field in the object called lookupinfo. What you should have
said is:

JPNGDNAPI.LookupInfo lookup = _myAdapter.lookupInfo;

notice that it is _myAdapter.lookupInfo because it is a property not
_myAdapter.lookupInfo() which it would be if that was a method.

Hope that helps
Mark R Dawson
http://www.markdawson.org
"rbeyea" wrote:

I am writing a DLL (DLL1) that is wrapping another DLL (DLL2). I need
to extract the information returned from DLL2 and pass it out to the
Client application this is using DLL1.

DLL2 returns data that I would like to return through DLL1 as a
collection so the user can use foreach (lookup li in
_myAdapter.lookupInfoCol) and get the li.JID and li.MailAddr1 data
from the returned collection.

The data is in the collection and I think it is getting returned to
the Client.
But I am getting a messages:
1.
C:\Develop\CSharp\TestJuryWrapper\JPNGDNAPI\myCons ole\myConsole.cs(25
):
'myConsoleNS.myConsole._myAdapter' denotes a 'field' where a 'class'
was
expected
and
2.
C:\Develop\CSharp\TestJuryWrapper\JPNGDNAPI\myCons ole\myConsole.cs(26
):
The type or namespace name 'lookup' could not be found (are you
missing a
using directive or an assembly reference?)
Any and all helps is extremely appreciated.
Thanks in advance,
rich
when trying to compile. Below is the code.

-> JSIAccessAdapter.cs

using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Reflection;
using System.IO;
using System.Collections;
namespace JPNGDNAPI
{
/// <summary>
/// JSIAccessAdapter is the base for the Jury Systems, inc wrapper..
/// </summary>
public class JSIAccessAdapter
{
// strings for communication with cobol dll
private string _ctlArea;
private string _reqArea;
private string _commArea;
// Declare the Classes for access.
private LookupInfo _LookupInfo;
private LookupInfoCol _LookupInfoCol;
public JSIAccessAdapter()
{
}

public LookupInfoCol GetJurorLookup(string LastName, string
FirstName,
string DOB)
{
string spaces = new String(' ', 100);
StringBuilder sb = new StringBuilder(213, 213);
// Set up the Ctl Area.
sb.Append("00000000000000000000000000000");
sb.Append(spaces);
_ctlArea = sb.ToString();
StringBuilder sbReq = new StringBuilder(43, 43);

sbReq.Append(LastName);
sbReq.Append(FirstName);
sbReq.Append(DOB);
_reqArea = sbReq.ToString();

_commArea = new String(' ', 4096);

// CallCobolRoutine(_commArea, _ctlArea, _reqArea);

// Instantiate the identityInfo class with the CommArea // This will
extract CommArea into the individual fields. LookupInfoCol
lookupInfoCol = new LookupInfoCol(_commArea);

return lookupInfoCol;

}

public LookupInfo lookupInfo
{
get
{
return _LookupInfo;
}
set
{
_LookupInfo = value;
}
}
public LookupInfoCol lookupInfoCol
{
get
{
return _LookupInfoCol;
}
set
{
_LookupInfoCol = value;
}
}
}
}
-> LookupInfo.cs

using System;

namespace JPNGDNAPI
{
/// <summary>
/// Summary description for LookupInfo.
/// </summary>
public class LookupInfo
{
private string _JID ;
private string _MailAddr1 ;
// // Constructor
// public LookupInfo()
// {
// }
//
// public LookupInfo(string JID, string MailAddr1)
// {
// this.JID = JID;
// this.MailAddr1 = MailAddr1;
// }
public string JID
{
get
{
return _JID;
}
set
{
_JID = value;
}
}
public string MailAddr1
{
get
{
return _MailAddr1;
}
set
{
_MailAddr1 = value;
}
}
}
}
->LookupInfoCol.cs

using System;
using System.Collections;
namespace JPNGDNAPI
{
/// <summary>
/// Summary description for LookupInfo.
/// </summary>
public class LookupInfoCol : ArrayList
{
const int C_MaxInfoItems = 15;

private ArrayList _LookupInfoCollection = new ArrayList();

private LookupInfo _LookupInfo = new LookupInfo();

// Constructor
public LookupInfoCol(String commArea)
{
ExtractLookupInfo(commArea);
}
private void ExtractLookupInfo(string commArea)
{
int j = 0; // JID - Starting Location in Comm Area
int k = 135; // Mail Address 1 - Starting Location in Comm Area
for (int i = 0; i < C_MaxInfoItems; i++)
{
if(commArea.Substring(j, 9) != "000000000")
{
lookupInfo = new LookupInfo();
_LookupInfo.JID = commArea.Substring(j, 9);
_LookupInfo.MailAddr1 = commArea.Substring(k, 30);
// LookupInfo lookupInfo = new LookupInfo(commArea.Substring(j, 9),
commArea.Substring(k, 30));
j += 9;
k += 30;
_LookupInfoCollection.Add(lookupInfo);
}
}

}

public LookupInfo lookupInfo
{
get
{
return _LookupInfo;
}
set
{
_LookupInfo = value;
}
}
}
}
-> MyConsole.cs - Client Console App.

using System;
using JPNGDNAPI;
namespace myConsoleNS
{
/// <summary>
/// Summary description for Class1.
/// </summary>
class myConsole
{
private JSIAccessAdapter _myAdapter = new JSIAccessAdapter();

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main(string[] args)
{
// Get access to the .Net Adapter
JSIAccessAdapter _myAdapter = new JSIAccessAdapter();
_myAdapter.lookupInfoCol = _myAdapter.GetJurorLookup("Hartquist",
"Barbara", "19411111");

-----------------------------> Message 1 appears for this line
below. _myAdapter.lookupInfoCol.lookupInfo lookup =
_myAdapter.lookupInfo();

-----------------------------> Message 2 appears for the line below.
Because
the line above is failing.
foreach (lookup li in _myAdapter.lookupInfoCol)
{
Console.WriteLine("JID = " + li.JID);
Console.WriteLine("JID = " + li.MailAddr1);
}
}
}
}

[Jon Skeet [C# MVP]]

rbeyea <rb****@softstufsoftware.com> wrote:

Thanks! I did as you suggested and did not get message 1 again. But when
I try to reference lookup in a Foreach I get:
C:\Develop\CSharp\JuryWrapper\JPNGDNAPI\WindowsApp lication1\JPNGDNAPIClient.cs(575):
The type or namespace name 'lookup' could not be found (are you missing a
using directive or an assembly reference?)

It seems like it is out of scope. But I don't understand what it is doing.

// I have a using for JPNGDNAPI so
it is not needed below.
LookupInfo lookup = _myAdapter.lookupInfo;

// "lookup" gets squigled and gets
the above error message.
foreach (lookup li in _myAdapter.lookupInfoCol)
{
lbOutput.Items.Add("JID = " + li.JID);
}

What is really weird is if I try to reference "lookup" it has a JID property
(which i would expect). I must be missing something completely obvious!

You're trying to declare li to be a variable of type "lookup" - you
actually want it to be of type "LookupInfo":

foreach (LookupInfo li in _myAdapter.lookupInfoCol)
{
...
}

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[jnospamster]

Also, _myAdapter has to be static.

[rbeyea]

Hello Jon Skeet [C# MVP],

Thanks! Worked perfect. I thought I had tried that.

Thanks again!

rbeyea <rb****@softstufsoftware.com> wrote:

Thanks! I did as you suggested and did not get message 1 again. But
when
I try to reference lookup in a Foreach I get:
C:\Develop\CSharp\JuryWrapper\JPNGDNAPI\WindowsApp lication1\JPNGDNAPI
Client.cs(575):
The type or namespace name 'lookup' could not be found (are you
missing a
using directive or an assembly reference?)
It seems like it is out of scope. But I don't understand what it is
doing.

// I have a using for JPNGDNAPI so
it is not needed below.
LookupInfo lookup = _myAdapter.lookupInfo;
// "lookup" gets squigled and gets
the above error message.
foreach (lookup li in _myAdapter.lookupInfoCol)
{
lbOutput.Items.Add("JID = " + li.JID);
}
What is really weird is if I try to reference "lookup" it has a JID
property (which i would expect). I must be missing something
completely obvious!

You're trying to declare li to be a variable of type "lookup" - you
actually want it to be of type "LookupInfo":

foreach (LookupInfo li in _myAdapter.lookupInfoCol)
{
...
}

[rbeyea]

Hello jn*********@gmail.com,

Thanks! it worked without being static. But I under stand why it should be
set this way!

Thanks again,
rich

Also, _myAdapter has to be static.

[Jon Skeet [C# MVP]]

<jn*********@gmail.com> wrote:

Also, _myAdapter has to be static.

No it doesn't - it's a local variable, at least in the first post.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too