[Mono-list] Newbie needs help compiling
Hello, I'm a newbie in .NET and I just want to compile Blam! . But I don't know where to begin.Could anybody help me step by step to make an executable of Blam! Source code. I have Mono 1.1.8 for Windows installed on my WinXP Pro . ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
[Mono-list] Problem with Events
Can anyone see anything wrong with this code. It looks to me to be
correct syntax for defining and raising an event. It compiles without
error, but when I run it I get the following error message
Unhandled Exception: System.NullReferenceException: Object reference not
set to an instance of an object
in [0x1] (at /home/tracy/MonoDevelop/TestEvents/Main.cs:22)
RaiseAnEvent:Run ()
in [0x7] (at /home/tracy/MonoDevelop/TestEvents/Main.cs:11)
MainClass:Main (System.String[] args)
I'm using Mono_1.1.8-2.
// project created on 04/08/2005 at 17:17
using System;
class MainClass
{
public static void Main(string[] args)
{
RaiseAnEvent RAE = new RaiseAnEvent();
RAE.Run();
}
}
class RaiseAnEvent
{
public delegate void InputError(object sender, InputErrorEventArgs e);
public event InputError OnInputError;
public void Run()
{
OnInputError(this, new InputErrorEventArgs("DF", "OI"));
}
}
//Class for passing Input Error messages to the application
class InputErrorEventArgs : EventArgs
{
private string errorMessage;
private string errorSource;
public string ErrorMessage
{
get
{
return errorMessage;
}
}
public string ErrorSource
{
get
{
return errorSource;
}
}
public InputErrorEventArgs(string Message, string Source) : base()
{
errorMessage = Message;
errorSource = Source;
}
}
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Re: [Mono-list] Problem with Events
On Thu, 2005-08-04 at 17:30 +1000, [EMAIL PROTECTED]
wrote:
> Can anyone see anything wrong with this code. It looks to me to be
> correct syntax for defining and raising an event. It compiles without
> error, but when I run it I get the following error message
Nothing is ever subscribing to your event, so it is null when you are
trying to invoke it. You need something like:
OnInputError += new InputError (ErrorHandlerFunction); somewhere.
A few general style comments:
1. Normally event handler delegates are named Handler. So
your InputError delegate would be named InputErrorHandler.
2. Normally events names don't start with On. So OnInputError would be
InputError.
3. It's common to wrap the instantiation of an event in a protected
method named On. So you would have a method that looks like
this:
protected void OnInputError (InputErrorEventArgs e)
{
if (InputError != null)
InputError (this, e);
}
Cheers,
Jackson
>
> Unhandled Exception: System.NullReferenceException: Object reference not
> set to an instance of an object
> in [0x1] (at /home/tracy/MonoDevelop/TestEvents/Main.cs:22)
> RaiseAnEvent:Run ()
> in [0x7] (at /home/tracy/MonoDevelop/TestEvents/Main.cs:11)
> MainClass:Main (System.String[] args)
>
> I'm using Mono_1.1.8-2.
>
> // project created on 04/08/2005 at 17:17
> using System;
>
> class MainClass
> {
>
> public static void Main(string[] args)
> {
> RaiseAnEvent RAE = new RaiseAnEvent();
> RAE.Run();
> }
> }
>
> class RaiseAnEvent
> {
> public delegate void InputError(object sender, InputErrorEventArgs e);
> public event InputError OnInputError;
>
> public void Run()
> {
> OnInputError(this, new InputErrorEventArgs("DF", "OI"));
> }
>
> }
>
>
> //Class for passing Input Error messages to the application
> class InputErrorEventArgs : EventArgs
> {
> private string errorMessage;
> private string errorSource;
>
> public string ErrorMessage
> {
> get
> {
> return errorMessage;
> }
> }
>
> public string ErrorSource
> {
> get
> {
> return errorSource;
> }
> }
>
> public InputErrorEventArgs(string Message, string Source) : base()
> {
> errorMessage = Message;
> errorSource = Source;
> }
> }
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Re: [Mono-list] mcs precise location patch is now in svn.
On 8/2/05, Atsushi Eno <[EMAIL PROTECTED]> wrote:
> Hello,
>
> My precise location patch for mcs (to report line/column, where it
> used to report incorrect locations) is now checked in svn.
>
> If any of you found such case that mcs does not report error location,
> please file a bug and/or report it here, with an example.
>
> Thanks,
> Atsushi Eno
using mcs r47994,
if the column is > 255, it starts counting from 0 again
if you compile the attached file 'Test3.cs', you get the message
Test3.cs(6,13): warning CS0168: The variable `a' is declared but never used
while the location should be (6,255+)
it only shows '255+' when there is an error/warning at column 255
-- Ben
using System;
public class Test3 {
public static void Main (string[] args)
{
int reaylngvaarnaaameethatexcedescolummmntwohundredfiftyfive; int a;
}
}
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Re: [Mono-list] ByteFX remote clients
Unfortunately there could be any number of reasons why "the other machine" is not reachable. Without more information there is little I can suggest. I would try making a very simple program that just does a simple select on a table and work through the software configuration on both machines until it works. Tom Larsen On Wed, 2005-08-03 at 23:06, Tarun R wrote: > I use ByteFX.Data.MySqlClient to access MySQL databases. > When I use the Database at the localhost, it works fine. > When I use the database on a remote server, there is an error which > says it can't be opened, even if it is the ip of the localhost. > I use mono-1.1.8-2. > > Help. Thanks. > > > __ > ___ > Mono-list maillist - Mono-list@lists.ximian.com > http://lists.ximian.com/mailman/listinfo/mono-list -- Tom Larsen <[EMAIL PROTECTED]> ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
[Mono-list] Add/Remove users
Is possible create/remove/edit linux users with mono? -- "A fé remove montanas, mas eu prefiro a dinamite" ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Mono, Win32 fibers. Almost there...
On 08/03/05 Bruce Wilkie wrote: > One final question in hopes someone has an idea. I've > gotten fibers to work with both the JIT and Interp Nice. You can ignore the interp, since we don't maintain it anymore. > engines. However, I'm having problems with garbage > collection. That is, objects seem to be getting > collected when the shouldn't. > > Could it be because the stack of the fiber isn't > registered with the boehm collector? does that sound > right? Yes, that's very likely. How do you allocate those stacks? You're supposed to use GC_MALLOC (stack_size). If you can't allocate them yourself, you'll have to change the GC code so that it knows about the stacks and use GC_push_all_stack (). See the libgc code for examples of when and how to call it. lupus -- - [EMAIL PROTECTED] debian/rules [EMAIL PROTECTED] Monkeys do it better ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
[Mono-list] Sqlite version
Hello, do you know what Sqlite version is handled by Mono.Data.SqliteClient.dll in Mono 1.1.6: 1, 2 or 3? Thank you Julien ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Mono linux question
Hi, > > Altough /clr:pure generates 100% pure valid IL code, it will add CRT DLL > > references using P/Invoke that will not run under Mono because Mono hasn't > [...] > > It would be good if you created a nice page on the wiki with all > the relevant info, so we can point people to it: managed c++ > questions are becoming a FAQ. > It could start like this: > > Question: Can I use Managed C++ or C++/CLI code with mono? > Short answer: Avoid Managed C++ and C++/CLI like the plague. > Long answer: Your text here. To be fair, managed code is being currently discussed for C++0x (the next version under discussion by the standards people). For now, it's to be avoided. TTFN Paul -- "Some people will do anything for a woman in uniform" - The Doctor - Unregenerate (Big Finish audio) ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] mcs precise location patch is now in svn.
Hi, > using mcs r47994, > if the column is > 255, it starts counting from 0 again > > if you compile the attached file 'Test3.cs', you get the message > Test3.cs(6,13): warning CS0168: The variable `a' is declared but never used > while the location should be (6,255+) > > it only shows '255+' when there is an error/warning at column 255 Oh, true... so I fixed this bug in svn (r48002). Thanks, Atsushi Eno ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] mcs precise location patch is now in svn.
Hi, > using mcs r47994, > if the column is > 255, it starts counting from 0 again > > if you compile the attached file 'Test3.cs', you get the message > Test3.cs(6,13): warning CS0168: The variable `a' is declared but never used > while the location should be (6,255+) > > it only shows '255+' when there is an error/warning at column 255 Oh, true... so I fixed this bug in svn (r48002). BTW, yes, it is a limitation of location reporting that the maximum precise column number is 255 (to save memory consumption). Thanks, Atsushi Eno ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
[Mono-list] RE: System.Security.Cryptography/CryptographicUnexpectedOperationExcpetion .cs
I think I figured it out. For some reason, the latest mono archive doesn't fully restore using 7zip (I downloaded it again to verify), although it 'tests' fine. Also, the file mentioned below is in CVS (I was looking in wrong folder). Cliff -- > Hello, > I get the following error when trying to build mono from scratch, with > latest source package (not cvs sync): > make[7]: Entering directory > `/home/cap/mono/mono/mono-1.1.8/mcs/class/corlib' > Creating ../../build/deps/basic_corlib_res.dll.response ... > Creating ../../build/deps/basic_corlib_res.dll.makefrag ... > Creating ../../build/deps/basic_corlib.dll.makefrag ... > make[7]: Leaving directory >`/home/cap/mono/mono/mono-1.1.8/mcs/class/corlib' > make[7]: Entering directory > `/home/cap/mono/mono/mono-1.1.8/mcs/class/corlib' > make all-local > make[8]: Entering directory > `/home/cap/mono/mono/mono-1.1.8/mcs/class/corlib' > make[8]: *** No rule to make target > `System.Security.Cryptography/CryptographicUnexpectedOperationExcpetion.cs', needed by `../../class/lib/basic/mscorlib.dll'. Stop. > I may be mistaken, but it appears that this file is missing. I check CVS, not there either. > Thanks, > Cliff ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
[Mono-list] Npgsql error
Hi
I tried to compile a simple C# program and access a Postgresql DB but I got this error in runtime (it compiled with no errors) :
[EMAIL PROTECTED] Mono]$ mcs dbaccess.cs -r:Npgsql.dll -r:System.Data.dll
[EMAIL PROTECTED] Mono]$ mono dbaccess.exe
Unhandled Exception: System.InvalidCastException: Cannot cast from source type to destination type.
in <0x000e1> dbAccess:Main (System.String[] args)
This is the code:
using System;
using System.Data;
using Npgsql;
public class dbAccess
{
public static void Main(string[] args)
{
string connectionString =
"Server=localhost;" +
"Database=opennms;" +
"User ID=opennms;" +
"Password=opennms;";
IDbConnection dbcon;
dbcon = new NpgsqlConnection(connectionString);
dbcon.Open();
IDbCommand dbcmd = dbcon.CreateCommand();
string sql =
"SELECT operatingsystem, nodeid " +
"FROM assets";
dbcmd.CommandText = sql;
IDataReader reader = dbcmd.ExecuteReader();
while(reader.Read()) {
string operatingsystem = (string) reader["operatingsystem"];
string nodeid = (string) reader["nodeid"];
Console.WriteLine("OS: " +
operatingsystem + " " + nodeid);
}
// clean up
reader.Close();
reader = null;
dbcmd.Dispose();
dbcmd = null;
dbcon.Close();
dbcon = null;
}
}
What am I doing wrong?
Thanks!!!-- Fabian
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Re: [Mono-list] Mono linux question
On 08/03/05 Kornél Pál wrote: > Altough /clr:pure generates 100% pure valid IL code, it will add CRT DLL > references using P/Invoke that will not run under Mono because Mono hasn't [...] It would be good if you created a nice page on the wiki with all the relevant info, so we can point people to it: managed c++ questions are becoming a FAQ. It could start like this: Question: Can I use Managed C++ or C++/CLI code with mono? Short answer: Avoid Managed C++ and C++/CLI like the plague. Long answer: Your text here. Thanks. lupus -- - [EMAIL PROTECTED] debian/rules [EMAIL PROTECTED] Monkeys do it better ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Npgsql error
Check the lines:
string operatingsystem = (string) reader["operatingsystem"];
string nodeid = (string) reader["nodeid"];
What happens of the results are NULL?
You should check for NULL first.
Then, are you sure that operatingsystem and nodeid are varchars or some other
type that translate into string?
If not then you would get that exception.
Cheers,
Emil
Fabian Salamanca Dominguez wrote:
Hi
I tried to compile a simple C# program and access a Postgresql DB but I
got this error in runtime (it compiled with no errors) :
[EMAIL PROTECTED] Mono]$ mcs dbaccess.cs -r:Npgsql.dll -r:System.Data.dll
[EMAIL PROTECTED] Mono]$ mono dbaccess.exe
Unhandled Exception: System.InvalidCastException: Cannot cast from
source type to destination type.
in <0x000e1> dbAccess:Main (System.String[] args)
This is the code:
using System;
using System.Data;
using Npgsql;
public class dbAccess
{
public static void Main(string[] args)
{
string connectionString =
"Server=localhost;" +
"Database=opennms;" +
"User ID=opennms;" +
"Password=opennms;";
IDbConnection dbcon;
dbcon = new NpgsqlConnection(connectionString);
dbcon.Open();
IDbCommand dbcmd = dbcon.CreateCommand();
string sql =
"SELECT operatingsystem, nodeid " +
"FROM assets";
dbcmd.CommandText = sql;
IDataReader reader = dbcmd.ExecuteReader();
while(reader.Read()) {
string operatingsystem = (string) reader["operatingsystem"];
string nodeid = (string) reader["nodeid"];
Console.WriteLine("OS: " +
operatingsystem + " " + nodeid);
}
// clean up
reader.Close();
reader = null;
dbcmd.Dispose();
dbcmd = null;
dbcon.Close();
dbcon = null;
}
}
What am I doing wrong?
Thanks!!!
--
Fabian
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---
mailto:[EMAIL PROTECTED]
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Re: [Mono-list] Npgsql error
Also another tip: you don't need to explicitly set connection etc. to null.
Cosider following improvement:
IDbConnection dbcon;
IDbCommand dbcmd;
IDataReader reader;
try {
dbcon = new NpgsqlConnection(connectionString);
dbcon.Open();
dbcmd = dbcon.CreateCommand();
string sql =
"SELECT operatingsystem, nodeid " +
"FROM assets";
dbcmd.CommandText = sql;
reader = dbcmd.ExecuteReader();
while(reader.Read()) {
string operatingsystem = (string) reader["operatingsystem"];
string nodeid = (string) reader["nodeid"];
Console.WriteLine("OS: " +
operatingsystem + " " + nodeid);
}
} catch (Exception ex) {
// do stuff, rollback transaction
} finally {
// cleanup, even if error occurs, closing the reader is important because
while it is open no other reader can be opened
if (reader!=null) reader.Close();
if (dbcmd!=null) dbcmd.Close();
if (dbcon!=null) dbcon.Close();
}
Fabian Salamanca Dominguez wrote:
Hi
I tried to compile a simple C# program and access a Postgresql DB but I
got this error in runtime (it compiled with no errors) :
[EMAIL PROTECTED] Mono]$ mcs dbaccess.cs -r:Npgsql.dll -r:System.Data.dll
[EMAIL PROTECTED] Mono]$ mono dbaccess.exe
Unhandled Exception: System.InvalidCastException: Cannot cast from
source type to destination type.
in <0x000e1> dbAccess:Main (System.String[] args)
This is the code:
using System;
using System.Data;
using Npgsql;
public class dbAccess
{
public static void Main(string[] args)
{
string connectionString =
"Server=localhost;" +
"Database=opennms;" +
"User ID=opennms;" +
"Password=opennms;";
IDbConnection dbcon;
dbcon = new NpgsqlConnection(connectionString);
dbcon.Open();
IDbCommand dbcmd = dbcon.CreateCommand();
string sql =
"SELECT operatingsystem, nodeid " +
"FROM assets";
dbcmd.CommandText = sql;
IDataReader reader = dbcmd.ExecuteReader();
while(reader.Read()) {
string operatingsystem = (string) reader["operatingsystem"];
string nodeid = (string) reader["nodeid"];
Console.WriteLine("OS: " +
operatingsystem + " " + nodeid);
}
// clean up
reader.Close();
reader = null;
dbcmd.Dispose();
dbcmd = null;
dbcon.Close();
dbcon = null;
}
}
What am I doing wrong?
Thanks!!!
--
Fabian
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--
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---
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[Mono-list] Problems running monodevelop (svn) and muine (svn)
Everything builds fine. I am using latest mono (1.1.8.2) in gentoo and gtk-sharp 2.5.5 Apps running fine: latest f-spot and tomboy Can someone figure this out? Trying to start monodevelop: Unhandled Exception: System.TypeInitializationException: An exception was thrown by the type initializer for MonoDevelop.Gui.Dialogs.SplashScreenForm ---> System.TypeInitializationException: An exception was thrown by the type initializer for Gtk.Container ---> System.EntryPointNotFoundException: gtksharp_gtk_container_get_focus_child_offset in (wrapper managed-to-native) Gtk.Container:gtksharp_gtk_container_get_focus_child_offset () in <0xa> Gtk.Container:.cctor ()--- End of inner exception stack trace --- in <0x0> in <0xe> Gtk.Bin:.ctor (IntPtr raw) in <0x0002f> Gtk.Window:.ctor (WindowType type) in <0x00025> MonoDevelop.Gui.Dialogs.SplashScreenForm:.ctor () in <0x00016> MonoDevelop.Gui.Dialogs.SplashScreenForm:.cctor ()--- End of inner exception stack trace --- in <0x0> in <0x005ac> MonoDevelop.SharpDevelopMain:Main (System.String[] args) With muine, i've the following error: (muine:1832): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed ... [cut] (muine:1832): GLib-GObject-CRITICAL **: g_object_set_data: assertion `G_IS_OBJECT (object)' failed Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeInitializationException: An exception was thrown by the type initializer for Gtk.Dialog ---> System.EntryPointNotFoundException: gtksharp_gtk_dialog_get_vbox_offset in (wrapper managed-to-native) Gtk.Dialog:gtksharp_gtk_dialog_get_vbox_offset () in <0x8> Gtk.Dialog:.cctor ()--- End of inner exception stack trace --- in <0x0> in (wrapper managed-to-native) System.Reflection.MonoCMethod:InternalInvoke (object,object[]) in <0x0006f> System.Reflection.MonoCMethod:Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture)--- End of inner exception stack trace --- in <0x00104> System.Reflection.MonoCMethod:Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) in <0x00019> System.Reflection.MonoCMethod:Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) in <0x001d7> System.Activator:CreateInstance (System.Type type, BindingFlags bindingAttr, System.Reflection.Binder binder, System.Object[] args, System.Globalization.CultureInfo culture, System.Object[] activationAttributes) in <0x00029> System.Activator:CreateInstance (System.Type type, BindingFlags bindingAttr, System.Reflection.Binder binder, System.Object[] args, System.Globalization.CultureInfo culture) in <0x0008f> GLib.ObjectManager:CreateObject (IntPtr raw) in <0x000c9> GLib.Object:GetObject (IntPtr o, Boolean owned_ref) in <0xc> GLib.Object:GetObject (IntPtr o) in <0x00045> Glade.XML:GetWidget (System.String name) in <0x0015b> Glade.XML:BindFields (System.Object target, System.Type type) in <0x00019> Glade.XML:BindFields (System.Object target) in <0x00016> Glade.XML:Autoconnect (System.Object handler) in <0x00059> Muine.ErrorDialog:.ctor (System.String s1, System.String s2) in <0x0001e> Muine.Global:Error (System.String message) in <0x0028c> Muine.Global:Main (System.String[] args) ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Npgsql error
Hi Emil,
Also another tip: you don't need to explicitly set connection etc. to
null.
Cosider following improvement:
IDbConnection dbcon;
IDbCommand dbcmd;
IDataReader reader;
try {
...
} finally {
// cleanup, even if error occurs, closing the reader is important because
while it is open no other reader can be opened
if (reader!=null) reader.Close();
if (dbcmd!=null) dbcmd.Close();
if (dbcon!=null) dbcon.Close();
}
A small tip: Your example is very java-ish. You could reduce the amount of
code by using C# using() statement which provides automatic cleanup for
connection, command and reader. I believe that the following is much more
readable and saves a lot of typing:
=
using (IDbConnection c = new NpgsqlConnection("connectionString"))
{
c.Open();
using (IDbCommand cmd = c.CreateCommand())
{
cmd.CommandText = "...";
using (IDataReader reader = cmd.ExecuteReader();
{
while (reader.Read())
{
}
}
}
==
--
Jaroslaw Kowalski
http://blog.jkowalski.net/
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Re: [Mono-list] Npgsql error
Cool, a question on that:
What happens if a exception occurs?
I meand close() gets called at the end of the using block, but does it get also
called when an exception occurs (sort of finally)?
If yes, I'm changing my programming style :)
Another question, how would it look like if you had to catch an exception (i.e.
to rollback a transaction)?
Thanx :)
Jaroslaw Kowalski wrote:
Hi Emil,
Also another tip: you don't need to explicitly set connection etc. to
null.
Cosider following improvement:
IDbConnection dbcon;
IDbCommand dbcmd;
IDataReader reader;
try {
...
} finally {
// cleanup, even if error occurs, closing the reader is important
because while it is open no other reader can be opened
if (reader!=null) reader.Close();
if (dbcmd!=null) dbcmd.Close();
if (dbcon!=null) dbcon.Close();
}
A small tip: Your example is very java-ish. You could reduce the amount
of code by using C# using() statement which provides automatic cleanup
for connection, command and reader. I believe that the following is much
more readable and saves a lot of typing:
=
using (IDbConnection c = new NpgsqlConnection("connectionString"))
{
c.Open();
using (IDbCommand cmd = c.CreateCommand())
{
cmd.CommandText = "...";
using (IDataReader reader = cmd.ExecuteReader();
{
while (reader.Read())
{
}
}
}
==
--
Emil R. Emilov
---
mailto:[EMAIL PROTECTED]
http://www.emilov.de
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[Mono-list] Re: Mono-list Digest, Vol 4, Issue 5 sender for your account)
I realised what I was doing wrong. I didn't have the test for null "if
(InputError != null)" in my original code, and as I wasn't at the time
subscribing to the event, it was naturally going to error out.
By the way the code I sent in is pretty much what you'll find on page
309 (Chapter 6 Advanced C# Topics) of Wrox's Professional C#. That's
where i copied it from, for my project.
regards
Tracy Barlow
> Date: Thu, 04 Aug 2005 01:56:52 -0700
> From: Jackson Harper <[EMAIL PROTECTED]>
> Subject: Re: [Mono-list] Problem with Events
> To: mono-list@lists.ximian.com
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain
>
> On Thu, 2005-08-04 at 17:30 +1000, [EMAIL PROTECTED]
> wrote:
> > Can anyone see anything wrong with this code. It looks to me to be
> > correct syntax for defining and raising an event. It compiles without
> > error, but when I run it I get the following error message
>
> Nothing is ever subscribing to your event, so it is null when you are
> trying to invoke it. You need something like:
>
> OnInputError += new InputError (ErrorHandlerFunction); somewhere.
>
> A few general style comments:
>
> 1. Normally event handler delegates are named Handler. So
> your InputError delegate would be named InputErrorHandler.
>
> 2. Normally events names don't start with On. So OnInputError would be
> InputError.
>
> 3. It's common to wrap the instantiation of an event in a protected
> method named On. So you would have a method that looks like
> this:
>
> protected void OnInputError (InputErrorEventArgs e)
> {
> if (InputError != null)
> InputError (this, e);
> }
>
>
> Cheers,
> Jackson
>
>
> >
> > Unhandled Exception: System.NullReferenceException: Object reference not
> > set to an instance of an object
> > in [0x1] (at /home/tracy/MonoDevelop/TestEvents/Main.cs:22)
> > RaiseAnEvent:Run ()
> > in [0x7] (at /home/tracy/MonoDevelop/TestEvents/Main.cs:11)
> > MainClass:Main (System.String[] args)
> >
> > I'm using Mono_1.1.8-2.
> >
> > // project created on 04/08/2005 at 17:17
> > using System;
> >
> > class MainClass
> > {
> >
> > public static void Main(string[] args)
> > {
> > RaiseAnEvent RAE = new RaiseAnEvent();
> > RAE.Run();
> > }
> > }
> >
> > class RaiseAnEvent
> > {
> > public delegate void InputError(object sender, InputErrorEventArgs e);
> > public event InputError OnInputError;
> >
> > public void Run()
> > {
> > OnInputError(this, new InputErrorEventArgs("DF", "OI"));
> > }
> >
> > }
> >
> >
> > //Class for passing Input Error messages to the application
> > class InputErrorEventArgs : EventArgs
> > {
> > private string errorMessage;
> > private string errorSource;
> >
> > public string ErrorMessage
> > {
> > get
> > {
> > return errorMessage;
> > }
> > }
> >
> > public string ErrorSource
> > {
> > get
> > {
> > return errorSource;
> > }
> > }
> >
> > public InputErrorEventArgs(string Message, string Source) : base()
> > {
> > errorMessage = Message;
> > errorSource = Source;
> > }
> > }
> > ___
> > Mono-list maillist - Mono-list@lists.ximian.com
> > http://lists.ximian.com/mailman/listinfo/mono-list
>
>
>
> --
>
> ___
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>
>
> End of Mono-list Digest, Vol 4, Issue 5
> ***
>
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[Mono-list] Datawindows
Hi, Perhaps anyone know about the Sybase RAD PowerBuilder, isn't it? Then sure you know about the functionality and power of its Datawindow Control. My question was if there is anything similar usable yet under mono or any other GPL development platform, or free at least. Any control or widget with similar power to Poweruilder DW? I know Winforms will have a DataGrid control, but, I don't know about its real functionality and power, and I don't know about its timing roadmap for use it in production envirnoment. Thanks in advance, -- Pere (Aesux) GNU/Linux 2.6.11-1.1369_FedoraCore4 ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
[Mono-list] Gnome and Kde and how the mono project works with them .......
I have just recently run in to a gtk-sharp issue on a kde desktop. Went to gnome on the same machine, and all is fine. It just got me thinking .. I don't really have a preference to either desk top, i just have been running KDE for years and years because it probably came up stock on an old distro. I see obviously direct support for gnome in the mono project, and of course gtk# appears to be where its at right now for gui with mono apps. That having been said .. I am about to roll out some mono/gtk# apps to a pool of about 1000 people working for various fortune 500 companies in US and fortune 50 companies in Canada. and I pick the desktop they run, and until now that is KDE. Since I am doing everything now in mono/gtk# on Linux (for these clients), (now) and in time want to have the most optimum desktop environment for these people, is it correct to say I should obviously be switching to Gnome based on the Mono project direction? If anyone were to guess..what percentage of mono lead developers/maintainers use gnome vs. kde? As far as I gather, mono/gtk# app. will work fine on both desktops but with gnome there will be synergy amongst apps (i.e. drag on to) that KDE will not have? And if this is the case, anyone thought about that type of support for KDE? Is there perhaps maybe a bit of hidden politics at work here too? but I find it odd ... Novell bought SUSE, Novell funds mono (to some extent), suse distro's default to KDE do they not? (pretty sure 9.0/9.1/9.2 do)? Since we see Novell funding mono, owning SUSE, and talk of how tight Gnome and mono may become what is the outlook/piture of KDE in the future. Looks like I am switching to Gnome unless my hunch (post) is completely off base. -tl ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Gnome and Kde and how the mono project works with them .......
Gee, tl, are you sure you want your clients to go through all that re-training and dealing with the (temporary) productivity loss while everyone gets acclimated to the new desktop? Not to mention all the documentation issues, lots of new configuration file changes, etc., that you'll need to deal with. Why not just stick with KDE? If you are concerned about being able to integrate your mono applications smoothly with qt-based interfaces, I would be glad to offer my services as a technical specialist and programmer to ensure your users won't have to deal with functionality gaps and kludgy interfaces to stay with your current environment :-) [sorry if this is a little off-topic] Harry Holt On 8/4/05, ted leslie <[EMAIL PROTECTED]> wrote: > I have just recently run in to a gtk-sharp issue on > a kde desktop. Went to gnome on the same machine, and all is fine. > > It just got me thinking .. > I don't really have a preference to either desk top, i just have been running > KDE for years and years because it probably came up stock on an old distro. > > I see obviously direct support for gnome in the mono project, and of course > gtk# appears to be where its at right now for gui with mono apps. > > That having been said .. I am about to roll out some mono/gtk# apps > to a pool of about 1000 people working for various fortune 500 companies in > US and fortune 50 companies in Canada. > > and I pick the desktop they run, and until now that is KDE. > > Since I am doing everything now in mono/gtk# on Linux (for these clients), > (now) and in time want to have the most optimum desktop environment > for these people, > is it correct to say I should obviously be switching to Gnome > based on the Mono project direction? > > If anyone were to guess..what percentage of mono lead developers/maintainers > use gnome vs. kde? > > As far as I gather, mono/gtk# app. will work fine on both desktops > but with gnome there will be synergy amongst apps (i.e. drag on to) > that KDE will not have? And if this is the case, anyone thought about > that type of support for KDE? > > Is there perhaps maybe a bit of hidden politics at work here too? > but I find it odd ... Novell bought SUSE, Novell funds mono (to some extent), > suse distro's default to KDE do they not? (pretty sure 9.0/9.1/9.2 do)? > Since we see Novell funding mono, owning SUSE, and talk of how tight > Gnome and mono may become what is the outlook/piture of KDE in the > future. > > Looks like I am switching to Gnome unless my hunch (post) is completely > off base. > > -tl > > ___ > Mono-list maillist - Mono-list@lists.ximian.com > http://lists.ximian.com/mailman/listinfo/mono-list > -- Robbie the Nanobot says: "Only YOU can prevent gray goo (NEVER release nanobot assemblers without replication limiting code)" http://lizardslounge.org ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Gnome and Kde and how the mono project works with them .......
On Thu, 2005-08-04 at 22:00 -0400, ted leslie wrote: > I have just recently run in to a gtk-sharp issue on > a kde desktop. Went to gnome on the same machine, and all is fine. It would be useful to know what the issue is. The goal is to allow desktop-agnostic applications, by using freedesktop.org standards when possible. (This isn't always possible, such as with theme changes and file & print dialogs, but the apps should work properly, even if they don't form a coherent whole...) > Since I am doing everything now in mono/gtk# on Linux (for these clients), > (now) and in time want to have the most optimum desktop environment > for these people, > is it correct to say I should obviously be switching to Gnome > based on the Mono project direction? As Harry Holt mentioned, you should choose whichever environment is best suited for your users. Re-training them may not be cost effective. Plus, it's always possible that someone will write a Qt# binding layer to allow better KDE interop. > If anyone were to guess..what percentage of mono lead developers/maintainers > use gnome vs. kde? 100% Gnome, AFAIK (though it would help to define "lead developers"). However, it should be noted that most of mono doesn't depend on Gnome or KDE -- XML, File I/O, everything that isn't GUI-related is completely desktop agnostic, so it doesn't matter that lupus (JIT guy extraordinaire) is running Gnome or FLTK or FluxBox, as the JIT doesn't change on any of those. With that being said, all Mono-related Novell-funded resources are going into Gtk# and System.Windows.Forms, not Qt#. (Which isn't to say that KDE isn't getting any resources from Novell, just no resources that are Mono-related, from what I've seen.) > As far as I gather, mono/gtk# app. will work fine on both desktops > but with gnome there will be synergy amongst apps (i.e. drag on to) > that KDE will not have? And if this is the case, anyone thought about > that type of support for KDE? Drag-and-drop should work. Copy/paste should work. If they don't work, then someone isn't adhering to the relevant freedesktop.org standards. What will differ? Themes, dialog boxes, HIG conventions (Mac-style [Cancel][Save] button layout vs. Windows [OK][Cancel] button layout), and more. Will those differences matter? It depends on the training your users receive. For example, Microsoft Office tends to have different widgets and conventions than every other Windows app, yet it does very well. :-) Training can make up for a lot. Don't underestimate its importance. Don't underestimate the harm of Change for Changes sake, either. Many users don't like change. > Is there perhaps maybe a bit of hidden politics at work here too? > but I find it odd ... Novell bought SUSE, Novell funds mono (to some extent), > suse distro's default to KDE do they not? (pretty sure 9.0/9.1/9.2 do)? The missing piece is that Novell bought Ximian, which originally developed Mono and is a big Gnome developer. >From the outside, Novell seems to be supporting both Gnome and KDE, but as far as Mono is concerned Gnome is getting all the support. > Since we see Novell funding mono, owning SUSE, and talk of how tight > Gnome and mono may become what is the outlook/piture of KDE in the > future. You'd have to ask the KDE developers that, and I'm sure they feel the future of KDE is bright. Whether they see Mono in their future is another matter, and whether Mono is part of Gnome's future will cause flame wars for years to come. :-) - Jon ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Npgsql error
Cool, a question on that:
What happens if a exception occurs?
I meand close() gets called at the end of the using block, but does it get
also called when an exception occurs (sort of finally)?
If yes, I'm changing my programming style :)
Another question, how would it look like if you had to catch an exception
(i.e. to rollback a transaction)?
The following code:
using (A a = new A())
{
code
};
Is equivalent to:
===
A a = null;
try
{
a = new A();
/// code
}
finally
{
if (a != null) ((IDisposable)a).Dispose();
}
===
It's the C# compiler that translates every using() to something like the
above code. The IDisposable.Dispose method on data providers automatically
rolls back any open and uncommitted transactions so you don't need to do
explicit rollbacks.
BTW. I've seen many (MS and other) examples where they don't call Dispose
the IDbCommand object, even though it implements IDisposable, I'm not sure
whether it leads to potential resource leaks or not.
--
Jaroslaw Kowalski
http://blog.jkowalski.net/
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[Mono-list] Datawindows
I've been Working on a Data Bound DataGrid that is based on Gtk# Widgets (Scrolled Window, TreeView, ListStore, Cellrenderer). It uses the WinForms DataGrid paradigm for for consuming Data providers, it's a work in progress (although it is sufficiently useful for my needs as it is). You are welcome to the code for it. I will be developing other DataBound Controls as I go. Regards Tracy Barlow > Date: Fri, 05 Aug 2005 01:01:26 +0200 > From: "(Aesux)" <[EMAIL PROTECTED]> > Subject: [Mono-list] Datawindows > To: mono-list@lists.ximian.com > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-15; format=flowed > > > Hi, > > Perhaps anyone know about the Sybase RAD PowerBuilder, isn't it? Then > sure you know about the functionality and power of its Datawindow Control. > > My question was if there is anything similar usable yet under mono or > any other GPL development platform, or free at least. Any control or > widget with similar power to Poweruilder DW? > > I know Winforms will have a DataGrid control, but, I don't know about > its real functionality and power, and I don't know about its timing > roadmap for use it in production envirnoment. > > Thanks in advance, > > > -- > > Pere (Aesux) > GNU/Linux 2.6.11-1.1369_FedoraCore4 ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Sqlite version
Chris Turchin a écrit : It works with 2.8.16 and 3.1.3 at any rate. I have tested both. Regards, --chris With what version of Mono? I've tried Sqlite 3.0.8 and Mono.Data.SqliteClient doesn't recognize the database format. Thank you Julien ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Sqlite version
You have to specify the Version in the Connectionstring: string connectionString = "Version=3,URI=file:SqliteTest.db"; Julien Sobrier wrote: Chris Turchin a écrit : It works with 2.8.16 and 3.1.3 at any rate. I have tested both. Regards, --chris With what version of Mono? I've tried Sqlite 3.0.8 and Mono.Data.SqliteClient doesn't recognize the database format. Thank you Julien ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list ___ Mono-list maillist - Mono-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-list
