class library

[Mihai Velicu]

Hi !

I created a class library and in it I have a class that call
"ConfigurationM anager" to find out what type of database I work and the
connection string.When I call this class from a form, everithing is running
well, no errors.When I call this class from a custom control I receive the
message "Object reference not set to an instance of an object"
Does anyoane know what is happening ?

Thanks,
Mihai

[Cor Ligthert [MVP]]

Mihai,

You have somewhere not instanced an object, try to find that in your code.
For us that is impossible, this newsgroup has not the possibility to look
through that video camera on your head.

Cor

"Mihai Velicu" <bv*****@telus. netschreef in bericht
news:ihCWg.6769 $P7.2840@edtnps 89...

Hi !

I created a class library and in it I have a class that call
"ConfigurationM anager" to find out what type of database I work and the
connection string.When I call this class from a form, everithing is
running well, no errors.When I call this class from a custom control I
receive the message "Object reference not set to an instance of an object"
Does anyoane know what is happening ?

Thanks,
Mihai

[Mihai Velicu]

So this line work perfectly if from a form I call the class that contain
this line
mConnectionStri ng =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ConnectionSt ring.ToString()

In a custom control that reside in a control library if i call the class
that reside in a library class and that has somewhere in a method this line,
is not working.Gave me that error message.

So don't be rude with comments like that one bellow.I tried a couple of
hours to see what is happening - debugging and serching in MSDN but
unfortunately with no results.That why I ask help on this newsgroup.

Regards,
Mihai
"Cor Ligthert [MVP]" <no************ @planet.nlwrote in message
news:Om******** *****@TK2MSFTNG P03.phx.gbl...

Mihai,

You have somewhere not instanced an object, try to find that in your code.
For us that is impossible, this newsgroup has not the possibility to look
through that video camera on your head.

Cor

"Mihai Velicu" <bv*****@telus. netschreef in bericht
news:ihCWg.6769 $P7.2840@edtnps 89...

>Hi !

I created a class library and in it I have a class that call
"Configuration Manager" to find out what type of database I work and the
connection string.When I call this class from a form, everithing is
running well, no errors.When I call this class from a custom control I
receive the message "Object reference not set to an instance of an
object"
Does anyoane know what is happening ?

Thanks,
Mihai

[Cor Ligthert [MVP]]

Mihai,

Don't you find your own question rude, asking something and giving not any
information. Is your configuration manager a shared class or has it to be
instanced, nothing that you show.

There should be a reason why it is not working, but even with this simple
code string we cannot see it, you suppose we start a kind of guessing
context. There is not a kind of wonder that protects it to be working in
this situation.

However as most people than reply, we don't have to anwer your questions, we
just can ignore it.

Cor

"Mihai Velicu" <bv*****@telus. netschreef in bericht
news:uaFWg.4579 $P7.1012@edtnps 90...

So this line work perfectly if from a form I call the class that contain
this line
mConnectionStri ng =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ConnectionSt ring.ToString()

In a custom control that reside in a control library if i call the class
that reside in a library class and that has somewhere in a method this
line, is not working.Gave me that error message.

So don't be rude with comments like that one bellow.I tried a couple of
hours to see what is happening - debugging and serching in MSDN but
unfortunately with no results.That why I ask help on this newsgroup.

Regards,
Mihai
"Cor Ligthert [MVP]" <no************ @planet.nlwrote in message
news:Om******** *****@TK2MSFTNG P03.phx.gbl...

>Mihai,

You have somewhere not instanced an object, try to find that in your
code. For us that is impossible, this newsgroup has not the possibility
to look through that video camera on your head.

Cor

"Mihai Velicu" <bv*****@telus. netschreef in bericht
news:ihCWg.676 9$P7.2840@edtnp s89...

>>Hi !

I created a class library and in it I have a class that call
"Configuratio nManager" to find out what type of database I work and the
connection string.When I call this class from a form, everithing is
running well, no errors.When I call this class from a custom control I
receive the message "Object reference not set to an instance of an
object"
Does anyoane know what is happening ?

Thanks,
Mihai

[Tom Shelton]

Mihai Velicu wrote:

Hi !

I created a class library and in it I have a class that call
"ConfigurationM anager" to find out what type of database I work and the
connection string.When I call this class from a form, everithing is running
well, no errors.When I call this class from a custom control I receive the
message "Object reference not set to an instance of an object"
Does anyoane know what is happening ?

Thanks,
Mihai

Mihai,

Can you give show us your app.config (obviously, change any sensitive
data :)... And maybe the method where you are calling this.

Thanks,

--
Tom Shelton

[Mihai]

I'm using Factory model to determine at runtime what kind of database I'm
using and to get the connection string from app.config.

I'm using the "ConfigurationM anager " static class provided by .Net
framework 2.0.

I marked in the code where the error is. I repeat again, from a form
everithing is running properly only from a user control that reside in a
control library is the problem. It seems I have to declare somehow the
static method in the code .
because the ConfigurationMa nager is a static method I cannot use New....

If you want to help me
Create a control library and in it, a control and put this code and try to
execute and you can see the results I mean the error message.You have to add
reference to System.Configur ation.
Bellow is the code and App.Config.

Thank you very much !
Mihai

The code is :

Imports System
Imports System.Data
Imports System.Data.Com mon
Imports System.Configur ation
Public Class NrSystemForAcco unts
'Private gts As GenericDb.Gener icDbWrapper.Gen ericTableServic es
Private dt As DataTable
Private mConnectionStri ng As String
Private mFactoryName As String
Private mFactory As DbProviderFacto ry
Private mFactoryConnect ion As DbConnection
Private mFactoryCommand As DbCommand
Private mDataAdapter As DbDataAdapter

Private Sub SetFactory(ByVa l DataBaseConnect ionName As String)

!!!!!!!! The error is in the line bellow :"Object reference not set to an
instance of an object"

mConnectionStri ng =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ConnectionSt r
ing.ToString()
mFactoryName =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ProviderName .
ToString()
mFactory = DbProviderFacto ries.GetFactory (mFactoryName)
End Sub

Private Sub NrSystemForAcco unts_Load(ByVal sender As System.Object, ByVal e
As System.EventArg s) Handles MyBase.Load
Me.SetFactory(" DatabaseConnect ion1")
End sub
End class
The App.config code is :

<?xml version="1.0" encoding="utf-8" ?>
<configuratio n>
<!-- This section defines the connections and database providers -->
<connectionStri ngs>

<add name="DatabaseC onnection1"
connectionStrin g="Persist Security Info=False;Inte grated
Security=SSPI;d atabase=Conta;s erver=(local);"
providerName="S ystem.Data.SqlC lient" />
<add name="DatabaseC onnection2"
connectionStrin g="" providerName="O racle" />
</connectionStrin gs>

<system.diagnos tics>
<sources>
<!-- This section defines the logging configuration for
My.Application. Log -->
<source name="DefaultSo urce" switchName="Def aultSwitch">
<listeners>
<add name="FileLog"/>
<!-- Uncomment the below section to write to the Application Event Log -->
<!--<add name="EventLog"/>-->
</listeners>
</source>
</sources>
<switches>
<add name="DefaultSw itch" value="Informat ion" />
</switches>
<sharedListener s>
<add name="FileLog"
type="Microsoft .VisualBasic.Lo gging.FileLogTr aceListener,
Microsoft.Visua lBasic, Version=8.0.0.0 , Culture=neutral ,
PublicKeyToken= b03f5f7f11d50a3 a, processorArchit ecture=MSIL"
initializeData= "FileLogWri ter"/>
<!-- Uncomment the below section and replace APPLICATION_NAM E with the name
of your application to write to the Application Event Log -->
<!--<add name="EventLog" type="System.Di agnostics.Event LogTraceListene r"
initializeData= "APPLICATION_NA ME"/-->
</sharedListeners >
</system.diagnost ics>
</configuration>

"Mihai Velicu" <bv*****@telus. netwrote in message
news:ihCWg.6769 $P7.2840@edtnps 89...

Hi !

I created a class library and in it I have a class that call
"ConfigurationM anager" to find out what type of database I work and the
connection string.When I call this class from a form, everithing is

running

well, no errors.When I call this class from a custom control I receive the
message "Object reference not set to an instance of an object"
Does anyoane know what is happening ?

Thanks,
Mihai

[rmacias]

Hi Mihai,

If you're trying to access data from an app.config file from a Class Library
(*.dll), the name of the config file must be the name of the callling
assembly.

For example say I have a Windows Forms EXE app called "MyProgram. exe" which
references a class library called "MyLibrary.dll" . Inside my library, I make
the call:

mConnectionStri ng =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ConnectionSt r
ing.ToString()

Now, if the config file is not name "MyProgram.exe. config" (it should NOT be
named "MyLibrary.dll. config"), or if the connection string does not exist in
the file, a NULL (Nothing) value will be returned at this portion of the
statement:

ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e)

Now since this part of the statement is returning Nothing, calling the
".ConnectionStr ing.ToString()" part will throw the exception you are seeing.
I would recommend doing something like this:

Dim connStrings As ConnectionStrin gSettingsCollec tion
connStrings = ConfigurationMa nager.Connectio nStrings

Dim conStr As ConnectionStrin gSettings
conStr = connStrs(DataBa seConnectionNam e)

If conStr Is Nothing then
Throw New Exception("App. config or connection string not found")
end If

If the exception gets thrown through the if statement check, then there's a
good change the DLL can not find the app.config file. Make sure your
connection strings are defined in the App.config file of the Calling Assembly
(of the .exe project).

"Mihai" wrote:

I'm using Factory model to determine at runtime what kind of database I'm
using and to get the connection string from app.config.

I'm using the "ConfigurationM anager " static class provided by .Net
framework 2.0.

I marked in the code where the error is. I repeat again, from a form
everithing is running properly only from a user control that reside in a
control library is the problem. It seems I have to declare somehow the
static method in the code .
because the ConfigurationMa nager is a static method I cannot use New....

If you want to help me
Create a control library and in it, a control and put this code and try to
execute and you can see the results I mean the error message.You have to add
reference to System.Configur ation.
Bellow is the code and App.Config.

Thank you very much !
Mihai

The code is :

Imports System
Imports System.Data
Imports System.Data.Com mon
Imports System.Configur ation
Public Class NrSystemForAcco unts
'Private gts As GenericDb.Gener icDbWrapper.Gen ericTableServic es
Private dt As DataTable
Private mConnectionStri ng As String
Private mFactoryName As String
Private mFactory As DbProviderFacto ry
Private mFactoryConnect ion As DbConnection
Private mFactoryCommand As DbCommand
Private mDataAdapter As DbDataAdapter

Private Sub SetFactory(ByVa l DataBaseConnect ionName As String)

!!!!!!!! The error is in the line bellow :"Object reference not set to an
instance of an object"

mConnectionStri ng =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ConnectionSt r
ing.ToString()
mFactoryName =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ProviderName .
ToString()
mFactory = DbProviderFacto ries.GetFactory (mFactoryName)
End Sub

Private Sub NrSystemForAcco unts_Load(ByVal sender As System.Object, ByVal e
As System.EventArg s) Handles MyBase.Load
Me.SetFactory(" DatabaseConnect ion1")
End sub
End class
The App.config code is :

<?xml version="1.0" encoding="utf-8" ?>
<configuratio n>
<!-- This section defines the connections and database providers -->
<connectionStri ngs>

<add name="DatabaseC onnection1"
connectionStrin g="Persist Security Info=False;Inte grated
Security=SSPI;d atabase=Conta;s erver=(local);"
providerName="S ystem.Data.SqlC lient" />
<add name="DatabaseC onnection2"
connectionStrin g="" providerName="O racle" />
</connectionStrin gs>

<system.diagnos tics>
<sources>
<!-- This section defines the logging configuration for
My.Application. Log -->
<source name="DefaultSo urce" switchName="Def aultSwitch">
<listeners>
<add name="FileLog"/>
<!-- Uncomment the below section to write to the Application Event Log -->
<!--<add name="EventLog"/>-->
</listeners>
</source>
</sources>
<switches>
<add name="DefaultSw itch" value="Informat ion" />
</switches>
<sharedListener s>
<add name="FileLog"
type="Microsoft .VisualBasic.Lo gging.FileLogTr aceListener,
Microsoft.Visua lBasic, Version=8.0.0.0 , Culture=neutral ,
PublicKeyToken= b03f5f7f11d50a3 a, processorArchit ecture=MSIL"
initializeData= "FileLogWri ter"/>
<!-- Uncomment the below section and replace APPLICATION_NAM E with the name
of your application to write to the Application Event Log -->
<!--<add name="EventLog" type="System.Di agnostics.Event LogTraceListene r"
initializeData= "APPLICATION_NA ME"/-->
</sharedListeners >
</system.diagnost ics>
</configuration>

"Mihai Velicu" <bv*****@telus. netwrote in message
news:ihCWg.6769 $P7.2840@edtnps 89...

Hi !

I created a class library and in it I have a class that call
"ConfigurationM anager" to find out what type of database I work and the
connection string.When I call this class from a form, everithing is

running

well, no errors.When I call this class from a custom control I receive the
message "Object reference not set to an instance of an object"
Does anyoane know what is happening ?

Thanks,
Mihai

[Mihai Velicu]

Thank you very much for you answer.I disturb you once again.Please tell me
in what book I can find what you told me because belive me or not a read a
lot and it seems for nothing.The usualy books don't have any reference to
something like that.

Thank you very much again,
Maihai

"rmacias" <rm*****@newsgr oup.nospamwrote in message
news:17******** *************** ***********@mic rosoft.com...

Hi Mihai,

If you're trying to access data from an app.config file from a Class
Library
(*.dll), the name of the config file must be the name of the callling
assembly.

For example say I have a Windows Forms EXE app called "MyProgram. exe"
which
references a class library called "MyLibrary.dll" . Inside my library, I
make
the call:

mConnectionStri ng =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ConnectionSt r
ing.ToString()

Now, if the config file is not name "MyProgram.exe. config" (it should NOT
be
named "MyLibrary.dll. config"), or if the connection string does not exist
in
the file, a NULL (Nothing) value will be returned at this portion of the
statement:

ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e)

Now since this part of the statement is returning Nothing, calling the
".ConnectionStr ing.ToString()" part will throw the exception you are
seeing.
I would recommend doing something like this:

Dim connStrings As ConnectionStrin gSettingsCollec tion
connStrings = ConfigurationMa nager.Connectio nStrings

Dim conStr As ConnectionStrin gSettings
conStr = connStrs(DataBa seConnectionNam e)

If conStr Is Nothing then
Throw New Exception("App. config or connection string not found")
end If

If the exception gets thrown through the if statement check, then there's
a
good change the DLL can not find the app.config file. Make sure your
connection strings are defined in the App.config file of the Calling
Assembly
(of the .exe project).

"Mihai" wrote:

>I'm using Factory model to determine at runtime what kind of database I'm
using and to get the connection string from app.config.

I'm using the "ConfigurationM anager " static class provided by .Net
framework 2.0.

I marked in the code where the error is. I repeat again, from a form
everithing is running properly only from a user control that reside in a
control library is the problem. It seems I have to declare somehow the
static method in the code .
because the ConfigurationMa nager is a static method I cannot use New....

If you want to help me
Create a control library and in it, a control and put this code and try
to
execute and you can see the results I mean the error message.You have to
add
reference to System.Configur ation.
Bellow is the code and App.Config.

Thank you very much !
Mihai

The code is :

Imports System
Imports System.Data
Imports System.Data.Com mon
Imports System.Configur ation
Public Class NrSystemForAcco unts
'Private gts As GenericDb.Gener icDbWrapper.Gen ericTableServic es
Private dt As DataTable
Private mConnectionStri ng As String
Private mFactoryName As String
Private mFactory As DbProviderFacto ry
Private mFactoryConnect ion As DbConnection
Private mFactoryCommand As DbCommand
Private mDataAdapter As DbDataAdapter

Private Sub SetFactory(ByVa l DataBaseConnect ionName As String)

!!!!!!!! The error is in the line bellow :"Object reference not set to an
instance of an object"

mConnectionStri ng =
ConfigurationM anager.Connecti onStrings(DataB aseConnectionNa me).ConnectionS tr
ing.ToString ()
mFactoryName =
ConfigurationM anager.Connecti onStrings(DataB aseConnectionNa me).ProviderNam e.
ToString()
mFactory = DbProviderFacto ries.GetFactory (mFactoryName)
End Sub

Private Sub NrSystemForAcco unts_Load(ByVal sender As System.Object, ByVal
e
As System.EventArg s) Handles MyBase.Load
Me.SetFactory(" DatabaseConnect ion1")
End sub
End class
The App.config code is :

<?xml version="1.0" encoding="utf-8" ?>
<configuration >
<!-- This section defines the connections and database providers -->
<connectionStr ings>

<add name="DatabaseC onnection1"
connectionStrin g="Persist Security Info=False;Inte grated
Security=SSPI; database=Conta; server=(local); "
providerName="S ystem.Data.SqlC lient" />
<add name="DatabaseC onnection2"
connectionStrin g="" providerName="O racle" />
</connectionStrin gs>

<system.diagno stics>
<sources>
<!-- This section defines the logging configuration for
My.Application .Log -->
<source name="DefaultSo urce" switchName="Def aultSwitch">
<listeners>
<add name="FileLog"/>
<!-- Uncomment the below section to write to the Application Event
Log -->
<!--<add name="EventLog"/>-->
</listeners>
</source>
</sources>
<switches>
<add name="DefaultSw itch" value="Informat ion" />
</switches>
<sharedListene rs>
<add name="FileLog"
type="Microsof t.VisualBasic.L ogging.FileLogT raceListener,
Microsoft.Visu alBasic, Version=8.0.0.0 , Culture=neutral ,
PublicKeyToken =b03f5f7f11d50a 3a, processorArchit ecture=MSIL"
initializeData ="FileLogWriter "/>
<!-- Uncomment the below section and replace APPLICATION_NAM E with the
name
of your application to write to the Application Event Log -->
<!--<add name="EventLog" type="System.Di agnostics.Event LogTraceListene r"
initializeData ="APPLICATION_N AME"/-->
</sharedListeners >
</system.diagnost ics>
</configuration>

"Mihai Velicu" <bv*****@telus. netwrote in message
news:ihCWg.676 9$P7.2840@edtnp s89...

Hi !

I created a class library and in it I have a class that call
"ConfigurationM anager" to find out what type of database I work and
the
connection string.When I call this class from a form, everithing is

running

well, no errors.When I call this class from a custom control I receive
the
message "Object reference not set to an instance of an object"
Does anyoane know what is happening ?

Thanks,
Mihai

[rmacias]

Honestly, a person can not learn to be a good troubleshooter and a good
programmer by reading books. Actually coding, debugging, making mistakes,
and learning from those mistakes is what makes a good coder. Experience
will always be the best teacher. It just takes some time. I hope this is
something you have learned and will remember the next time something like
this comes up.

Good luck!!

"Mihai Velicu" wrote:

Thank you very much for you answer.I disturb you once again.Please tell me
in what book I can find what you told me because belive me or not a read a
lot and it seems for nothing.The usualy books don't have any reference to
something like that.

Thank you very much again,
Maihai

"rmacias" <rm*****@newsgr oup.nospamwrote in message
news:17******** *************** ***********@mic rosoft.com...

Hi Mihai,

If you're trying to access data from an app.config file from a Class
Library
(*.dll), the name of the config file must be the name of the callling
assembly.

For example say I have a Windows Forms EXE app called "MyProgram. exe"
which
references a class library called "MyLibrary.dll" . Inside my library, I
make
the call:

mConnectionStri ng =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ConnectionSt r
ing.ToString()

Now, if the config file is not name "MyProgram.exe. config" (it should NOT
be
named "MyLibrary.dll. config"), or if the connection string does not exist
in
the file, a NULL (Nothing) value will be returned at this portion of the
statement:

ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e)

Now since this part of the statement is returning Nothing, calling the
".ConnectionStr ing.ToString()" part will throw the exception you are
seeing.
I would recommend doing something like this:

Dim connStrings As ConnectionStrin gSettingsCollec tion
connStrings = ConfigurationMa nager.Connectio nStrings

Dim conStr As ConnectionStrin gSettings
conStr = connStrs(DataBa seConnectionNam e)

If conStr Is Nothing then
Throw New Exception("App. config or connection string not found")
end If

If the exception gets thrown through the if statement check, then there's
a
good change the DLL can not find the app.config file. Make sure your
connection strings are defined in the App.config file of the Calling
Assembly
(of the .exe project).

"Mihai" wrote:

I'm using Factory model to determine at runtime what kind of database I'm
using and to get the connection string from app.config.

I'm using the "ConfigurationM anager " static class provided by .Net
framework 2.0.

I marked in the code where the error is. I repeat again, from a form
everithing is running properly only from a user control that reside in a
control library is the problem. It seems I have to declare somehow the
static method in the code .
because the ConfigurationMa nager is a static method I cannot use New....

If you want to help me
Create a control library and in it, a control and put this code and try
to
execute and you can see the results I mean the error message.You have to
add
reference to System.Configur ation.
Bellow is the code and App.Config.

Thank you very much !
Mihai

The code is :

Imports System
Imports System.Data
Imports System.Data.Com mon
Imports System.Configur ation
Public Class NrSystemForAcco unts
'Private gts As GenericDb.Gener icDbWrapper.Gen ericTableServic es
Private dt As DataTable
Private mConnectionStri ng As String
Private mFactoryName As String
Private mFactory As DbProviderFacto ry
Private mFactoryConnect ion As DbConnection
Private mFactoryCommand As DbCommand
Private mDataAdapter As DbDataAdapter

Private Sub SetFactory(ByVa l DataBaseConnect ionName As String)

!!!!!!!! The error is in the line bellow :"Object reference not set to an
instance of an object"

mConnectionStri ng =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ConnectionSt r
ing.ToString()
mFactoryName =
ConfigurationMa nager.Connectio nStrings(DataBa seConnectionNam e).ProviderName .
ToString()
mFactory = DbProviderFacto ries.GetFactory (mFactoryName)
End Sub

Private Sub NrSystemForAcco unts_Load(ByVal sender As System.Object, ByVal
e
As System.EventArg s) Handles MyBase.Load
Me.SetFactory(" DatabaseConnect ion1")
End sub
End class
The App.config code is :

<?xml version="1.0" encoding="utf-8" ?>
<configuratio n>
<!-- This section defines the connections and database providers -->
<connectionStri ngs>

<add name="DatabaseC onnection1"
connectionStrin g="Persist Security Info=False;Inte grated
Security=SSPI;d atabase=Conta;s erver=(local);"
providerName="S ystem.Data.SqlC lient" />
<add name="DatabaseC onnection2"
connectionStrin g="" providerName="O racle" />
</connectionStrin gs>

<system.diagnos tics>
<sources>
<!-- This section defines the logging configuration for
My.Application. Log -->
<source name="DefaultSo urce" switchName="Def aultSwitch">
<listeners>
<add name="FileLog"/>
<!-- Uncomment the below section to write to the Application Event
Log -->
<!--<add name="EventLog"/>-->
</listeners>
</source>
</sources>
<switches>
<add name="DefaultSw itch" value="Informat ion" />
</switches>
<sharedListener s>
<add name="FileLog"
type="Microsoft .VisualBasic.Lo gging.FileLogTr aceListener,
Microsoft.Visua lBasic, Version=8.0.0.0 , Culture=neutral ,
PublicKeyToken= b03f5f7f11d50a3 a, processorArchit ecture=MSIL"
initializeData= "FileLogWri ter"/>
<!-- Uncomment the below section and replace APPLICATION_NAM E with the
name
of your application to write to the Application Event Log -->
<!--<add name="EventLog" type="System.Di agnostics.Event LogTraceListene r"
initializeData= "APPLICATION_NA ME"/-->
</sharedListeners >
</system.diagnost ics>
</configuration>

"Mihai Velicu" <bv*****@telus. netwrote in message
news:ihCWg.6769 $P7.2840@edtnps 89...
Hi !

I created a class library and in it I have a class that call
"ConfigurationM anager" to find out what type of database I work and
the
connection string.When I call this class from a form, everithing is
running
well, no errors.When I call this class from a custom control I receive
the
message "Object reference not set to an instance of an object"
Does anyoane know what is happening ?

Thanks,
Mihai