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I'm trying to serialize a number of simple classes over socket, and it seems to work pretty good locally. I connect to the server, which sends me a simple text, which client prints, then I go into a loop on both sides where client initiates requests by creating objects of type "Request" (which I have defined) and serializing them over the socket.
The server then deserializes them, and creates an object of type "Response", which it then serializes back.
It all work very well, until I try connecting _from another machine_.
I get a connection, but the data just isn't sent (from server to client. I manage to send data from the client to the server).
I've tries serializing to memory and then sending the socket, but it seems to be incompatible (somehow) with just using a plain binaryformatter onto the networkstream.
Here's the server code:
private void SendResponse(Response p_response)
{
try
{
BinaryFormatter t_binaryFormatter = new BinaryFormatter();
NetworkStream t_networkStream = new NetworkStream(m_socket);
t_binaryFormatter.Serialize(t_networkStream, p_response);
}
catch (System.Exception e)
{
m_app.log(e, this);
}
}
(Works well locally, but not from another machine, both doing TCP/IP).
Alternative server-code:
private void SendResponse(Response p_response)
{
try
{
BinaryFormatter t_binaryFormatter = new BinaryFormatter();
MemoryStream t_memoryStream = new MemoryStream();
t_binaryFormatter.Serialize(t_memoryStream, p_response);
m_socket.Send(t_memoryStream.GetBuffer());
}
catch (System.Exception e)
{
m_app.log(e, this);
}
}
Works well even remotely for the first request, but after that I get this exception (in the client):
Exception: Binary stream does not contain a valid BinaryHeader, 0 possible causes, invalid stream or object version change between serialization and deserialization.
It seems there is superfluous data sent from the server when using the MemoryStream.
Any pointers? Thanks in advance.
Ideally, I would want to get it to work without using the MemoryStream.
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Hello,
I got this weird problem when checking and unchecking boxes. I am developing a backup program that works every similar to Backup Exec with a add'l features. If you select a directory (folder) to be backed up it seems to run through a constant loop until all the files and folders associated with that directory have been filfilled. Does anyone have sample that they might be able to supply me to use so that I can get this to work correctly? I would really appreciate it. Thank you.
cAptHiDDeN 
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Hello all, I am having a bit of a problem with databases. Right now I have an application that stores data into an access database. But when the database goes over 2 gigs the application crashes out and it starts over writting the header file. Please give me some suggestions with using other database collectors, that would be a great help. Thanks
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DO you use Access or SQL?I think Access has some limitation for size of database.SQLServer is more trustable for large database.
Mazy
"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down
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This is happening because Access limits the database size to 2 gigs. You might try archiving, I don't know if thats easy in access or even possible in your application. The long term solution is to migrate to SQL server. It's relativly I easy I think(I have not done this in a production setting so I am not sure how well this works).
Steve
Not all who wander are lost...
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Hi,All
I want to Drag a node from TreeView1 and drop it to TreeView2,For that i do like this:
private void treeView1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
treeView1 = (System.Windows.Forms.TreeView )sender;
System.Windows.Forms.TreeNode tn = = new System.Windows.Forms.TreeNode();
tn = treeView1.GetNodeAt(e.X,e.Y);
if(tn != null)
treeView1.DoDragDrop(tn.Text ,DragDropEffects.Copy | DragDropEffects.Move);
}
AllowDrop Property of Treeview2 is set to true.
private void TreeView2_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
MessageBox.Show("In DragDrop");
}
But when i Drop it on TreeView2 it does'nt come in DragDrop Event.
also when i drag the node from TreeView1 it shows a symbol(Line inside circle),means Draging not allowed!
What else i should do to drag and drop node?
thanks in advance
Tushar.
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Hi Tushar,
I think you need to add an event handler for the DragOver event on TreeView2 to signal that you are ready to handle the drop. Try this:
private void treeView2_DragOver(object sender,System.Windows.Forms.DragEventArgs e)
{
e.Effect=DragDropEffects.All ;
}
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My program "A" connect to a database, and write data to a xml file.
///////my code
this.myDataSet.WriteXml("test.xml",XmlWriteMode.IgnoreSchema);
StreamWriter xmlsw = new StreamWriter("test.xml",false);
this.myDataSet.WriteXml(xmlsw,XmlWriteMode.IgnoreSchema);
xmlsw.Close();
///////
And I have another program "B" will access test.xml every 30 sec. Sometime the program "A" will cause an unhandled exception like this:
//error message
An unhandled exception has occurred in your application. If you click Continue,the application will ignore this error and attempt to continue. If you click Quit, the application will be shut shut down immediately.
The process cannot access the file "test.xml" because it is being used by another process.
/////
My question is :
1. How can I check the file is access by another program before writing data to this file.
2. Or, How can I ignore this message automatically.
thanks.
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You can trap the exception
try
{
//unstable code here
}
catch(Exception ex)
{
//whatever you want to do when there is an exception.
}
Just an example.
Andres Manggini.
Buenos Aires - Argentina.
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I am interested in accessing and manipulating the position of the icons on the desktop. I am also interested in how to dock a window to the outside edge of the desktop. If anyone can help me on either of these topics it would be greatly appreciated.
Thanks...
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Has anybody purchased Inside C# from Amazon UK recently. I want to get the second edition (already owning the first), but the one on Amazon seems to still be the first edition.
I'm assuming this is a web-site c**k-up but don't want to risk buying something I already have.
Michael 
Look, try and use your intelligence, man, even if you are a politician. - The Doctor
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Well, I just checked Amazon.com and it ships the 2nd edition... Do you have to go through Amazon UK or can you grab it from Amazon.com?
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They will create a new record for the 2nd ed, and they may be holding on to it until stocks of the first sell out.
Christian
come on all you MS suckups, defend your sugar-daddy now. - Chris Losinger - 11/07/2002
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If anyone has a very good C# book to recomment, please let me know. I don't want something that takes me by the hand (altough OOP principles and the philosophy behind Windows\Web Services programming would be nice...). I know my way around although I've never really touched C++ before (mainly Javascript, Perl, ASP and PHP).
Also, are C# and VC++ really different? If yes, I guess I'd like suggestions on good VC++ books too!  Is there a big difference between the VC++ for Visual Studio 6 and Visual Studio .NET? Thanks!
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Inside C# by Tom Archer is a very good book. I have the first edition but the second edition is supposed to be better.
Visual C++.NET Step-by-Step is also a good book for learning how to program .NET under C++.
Michael
Look, try and use your intelligence, man, even if you are a politician. - The Doctor
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If you haven't done much .NET before, I think you want a frameworks and language book. Troelson (Apress) and Liberty (O'Reilly) are pretty good choices here.
If you want a C# language book, I like my own book (Gunnerson (Apress))
If you want a VC.NET book, Challa and Laksberg (Apress) is the only one I know of, but there might be more now. VC.NET is pretty complex, however.
And yes, C# and VC++ are quite a bit different. They're both curly-brace languages, but C# is considerably less complex.
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Thanks for the suggestions! I'd like to check out the first two books you mention (Troelson's and Liberty's) but was wondering if they're compliant with the final releases of the Visual Studio .NET? Archer's Inside C# is sais to be compatible with .NET beta 2. Is this the same thing with the two other books or are they up to speed? Thanks again!
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merlin9876 wrote:
Archer's Inside C# is sais to be compatible with .NET beta 2.
If you can get your hands on the 2nd Edition of Inside C# it is updated for the final release. In addition to that the page count has doubled with lots of new content (or just about doubled; I don't have the exact numbers in front of me).
I'll recommend the second edition of Inside C# to anyone who wants to learn C#; but I haven't read Eric's, Jessie's, nor Andrew's books so I can't form any comparison between them. I can only offer that Tom's book cleared up a few things for me while I was reading his book, AFTER I had read Wrox's Programming C# with the Public Beta.
I've even learned something new from the second edition as well; so it's well worth the investment.
And just as any reputable news organization will do; I will let you know that I'm currently working with Tom on a new project.
James
"Java is free - and worth every penny." - Christian Graus
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The changes between beta2 and RTM were really pretty tiny. An updated book is better - because it will contain lots of small fixes - but I don't think the delta will be much of an issue.
I think that Liberty has an updated version out. I'm not sure about Troelson.
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Hi all
I get this msg when trying to compile:
Operator '*' cannot be applied to operands of type 'decimal' and 'double'.
Surely this cant be right.
OK, downcasting decimal to double works fine though.
READ MSDN
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Arithmetic operations are always defined on similar types:
double + double
decimal + decimal
int + int
In some cases, there will be an implicit conversion that allows something like:
short i = 5;
int j = 55 + i;
to succeed, by automatically converting i to an int.
With double and decimal, there are no such implicit conversions. Decimal carries more significant digits than double, and double has more range, so you can't convert from one to the other without possible data loss.
That's why you're getting the error.
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Many thanx, sometimes one just need a good explanation
READ MSDN
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Hi all
I was just wondering if there are any other sites available similar to SourceForge and Freshmeat where you can host and find C# applications? Correct me if I am wrong, but I find codeproject is really restricted to code snippets and libraries.
Cheers
READ MSDN
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Not sure of the kind of stuff you are looking for, but have you tried http://www.gotdotnet.com/
Michael
Look, try and use your intelligence, man, even if you are a politician. - The Doctor
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I am interested in creating an application that is similar to a windows start bar which docks to the top of the desktop instead of the bottom. It is unclear to me how I would go about building such an application. I need it to interact with the icons on the desktop such that it just doesn't cover them over but moves the icons appropriately down to make way for the window that is docking to the top. Just as when you are resizing the windows start bar on the bottom the icons are rearranged to make room for the larger start bar.
If anyone could point me in the right direction as to what I am trying to do is called or give me a few hints. It would be greatly appreciated.
 Thanks
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