An unhandled exception of type 'System.NullRef erenceException ' occurred in my_deepot_commo n.dll

[Pedro Dinis]

i have this class library that connects to the database(see appconfig below)

compiling 0 errors but when its running i amhaving this error

An unhandled exception of type 'System.NullRef erenceException ' occurred in
my_deepot_commo n.dll Object reference not set to an instance of an obj

int this line

public System.Data.Sql Client.SqlConne ction user_connection = new
System.Data.Sql Client.SqlConne ction(System.Co nfiguration.Con figurationManag er.ConnectionSt rings["my_deepot_comm on.Properties.S ettings.utiliza doresConnection String"].ConnectionStri ng);

thanks

using System;

using System.Collecti ons.Generic;

using System.Text;

using System.Data;

using System.Data.Sql Client;

using System.Configur ation;

namespace my_deepot_commo n

{

public class DB_Connection

{
public System.Data.Sql Client.SqlConne ction user_connection = new
System.Data.Sql Client.SqlConne ction(System.Co nfiguration.Con figurationManag er.ConnectionSt rings["my_deepot_comm on.Properties.S ettings.utiliza doresConnection String"].ConnectionStri ng);

public System.Data.Sql Client.SqlConne ction lang_connection = new
System.Data.Sql Client.SqlConne ction(System.Co nfiguration.Con figurationManag er.ConnectionSt rings["my_deepot_comm on.Properties.S ettings.linguag emConnectionStr ing"].ConnectionStri ng);

public DB_Connection()

{
}


}

}

APP_CONFIG

<connectionStri ngs>
<add
name="my_deepot _common.Propert ies.Settings.li nguagemConnecti onString"
connectionStrin g="Data
Source=.\SQLEXP RESS;AttachDbFi lename=E:\my_de epot\my_deepot_ common\Data\lin guagem.mdf;Inte grated
Security=True;U ser Instance=True"
providerName="S ystem.Data.SqlC lient" />
<add
name="my_deepot _common.Propert ies.Settings.ut ilizadoresConne ctionString"
connectionStrin g="Data
Source=.\SQLEXP RESS;AttachDbFi lename=E:\my_de epot\my_deepot_ common\Data\uti lizadores.mdf;I ntegrated
Security=True;U ser Instance=True"
providerName="S ystem.Data.SqlC lient" />
</connectionStrin gs>

[Pedro Dinis]

the connection string was malformed

public System.Data.Sql Client.SqlConne ction user_connection = new
System.Data.Sql Client.SqlConne ction("Data
Source=.\\SQLEX PRESS;AttachDbF ilename=E:\\my_ deepot\\comum\\ Data\\utilizado res.mdf;Integra ted
Security=True;U ser Instance=True") ;
public System.Data.Sql Client.SqlConne ction lang_connection = new
System.Data.Sql Client.SqlConne ction("Data
Source=.\\SQLEX PRESS;AttachDbF ilename=E:\\my_ deepot\\comum\\ Data\\linguagem .mdf;Integrated
Security=True;U ser Instance=True") ;

//public System.Data.Sql Client.SqlConne ction user_connection = new
System.Data.Sql Client.SqlConne ction(System.Co nfiguration.Con figurationManag er.ConnectionSt rings["comum.Properti es.Settings.uti lizadoresConnec tionString"].ConnectionStri ng);
//public System.Data.Sql Client.SqlConne ction lang_connection = new
System.Data.Sql Client.SqlConne ction(System.Co nfiguration.Con figurationManag er.ConnectionSt rings["comum.Properti es.Settings.lin guagemConnectio nString"].ConnectionStri ng);
"Pedro Dinis" <pe***@code4cer veja.comescreve u na mensagem
news:D1******** *************** ***********@mic rosoft.com...

>i have this class library that connects to the database(see appconfig
below)

compiling 0 errors but when its running i amhaving this error

An unhandled exception of type 'System.NullRef erenceException ' occurred in
my_deepot_commo n.dll Object reference not set to an instance of an obj

int this line

public System.Data.Sql Client.SqlConne ction user_connection = new
System.Data.Sql Client.SqlConne ction(System.Co nfiguration.Con figurationManag er.ConnectionSt rings["my_deepot_comm on.Properties.S ettings.utiliza doresConnection String"].ConnectionStri ng);

thanks

using System;

using System.Collecti ons.Generic;

using System.Text;

using System.Data;

using System.Data.Sql Client;

using System.Configur ation;

namespace my_deepot_commo n

{

public class DB_Connection

{
public System.Data.Sql Client.SqlConne ction user_connection = new
System.Data.Sql Client.SqlConne ction(System.Co nfiguration.Con figurationManag er.ConnectionSt rings["my_deepot_comm on.Properties.S ettings.utiliza doresConnection String"].ConnectionStri ng);

public System.Data.Sql Client.SqlConne ction lang_connection = new
System.Data.Sql Client.SqlConne ction(System.Co nfiguration.Con figurationManag er.ConnectionSt rings["my_deepot_comm on.Properties.S ettings.linguag emConnectionStr ing"].ConnectionStri ng);

public DB_Connection()

{
}


}

}

APP_CONFIG

<connectionStri ngs>
<add
name="my_deepot _common.Propert ies.Settings.li nguagemConnecti onString"
connectionStrin g="Data
Source=.\SQLEXP RESS;AttachDbFi lename=E:\my_de epot\my_deepot_ common\Data\lin guagem.mdf;Inte grated
Security=True;U ser Instance=True"
providerName="S ystem.Data.SqlC lient" />
<add
name="my_deepot _common.Propert ies.Settings.ut ilizadoresConne ctionString"
connectionStrin g="Data
Source=.\SQLEXP RESS;AttachDbFi lename=E:\my_de epot\my_deepot_ common\Data\uti lizadores.mdf;I ntegrated
Security=True;U ser Instance=True"
providerName="S ystem.Data.SqlC lient" />
</connectionStrin gs>