C# Discussion Boards - CodeProject

17-Dec-06 23:51

Hi there! I'm not able to convert following vb.net code to c#. Pls assist

Public Sub WriteBinary(ByVal FileName As String, ByVal ds As DataSet)
ds.RemotingFormat = SerializationFormat.Binary
Dim myFormatter As IFormatter = New Formatters.Binary.BinaryFormatter
Dim myStream As Stream = New FileStream(FileName, FileMode.Create)
myFormatter.Serialize(myStream, ds)
End Sub

The line in bold is giving me trouble

Thanks

Don't Quit

Guffa18-Dec-06 0:04

18-Dec-06 0:04

IFormatter myFormatter = new Formatters.Binary.BinaryFormatter();

---
It's amazing to see how much work some people will go through just to avoid a little bit of work.

Nitin198118-Dec-06 2:06

18-Dec-06 2:06

Hi Guffa! Thanks for replying. I've already done this. It don't seem to work. This is the code.

void WriteBinary(String FileName, DataSet ds)
{
ds.RemotingFormat = SerializationFormat.Binary;
IFormatter myFormatter = new Formatters.Binary.BinaryFormatter();
Stream myStream = new FileStream(FileName, FileMode.Create);
myFormatter.Serialize(myFormatter, ds);

}

These are the errors

Error 1 The type or namespace name 'Formatters' could not be found (are you missing a using directive or an assembly reference?) d:\Nitin\Serialization1\Serialization1\Serialization1\Form1.cs 58 42 Serialization1

Error 2 The best overloaded method match for 'System.Runtime.Serialization.IFormatter.Serialize(System.IO.Stream, object)' has some invalid arguments d:\Nitin\Serialization1\Serialization1\Serialization1\Form1.cs 60 13 Serialization1

Error 3 Argument '1': cannot convert from 'System.Runtime.Serialization.IFormatter' to 'System.IO.Stream' d:\Nitin\Serialization1\Serialization1\Serialization1\Form1.cs 60 35 Serialization1

Thanks

Don't Quit

Guffa18-Dec-06 3:50

18-Dec-06 3:50

Nitin1981 wrote:
Error 1 The type or namespace name 'Formatters' could not be found (are you missing a using directive or an assembly reference?

I see. Specifying namespaces works a bit different in VB and C#. Specify the full namespace:

IFormatter myFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();

Nitin1981 wrote:
Error 3 Argument '1': cannot convert from 'System.Runtime.Serialization.IFormatter' to 'System.IO.Stream'

Why have you put the formatter there? In the VB code it's the stream.

---
It's amazing to see how much work some people will go through just to avoid a little bit of work.

Nitin198118-Dec-06 18:30

18-Dec-06 18:30

Hi Guffa, I got it to work. Ya I did make a mistake.

1. Even after importing necessary namespace fully qualified namespace has to be specified in c sharp so is it a bug in Csharp.?

2. Another thing how do you arrive at the conclusion by trial & error or is there some other way.

Thanks for your assistance.

Don't Quit

Guffa19-Dec-06 2:19

19-Dec-06 2:19

Nitin1981 wrote:
1. Even after importing necessary namespace fully qualified namespace has to be specified in c sharp so is it a bug in Csharp.?

No, it's not a bug. C# is just a little stricter about separating namespaces from class names than VB. When you import a namespace in C# you have to specify the complete namespace, while in VB you can import part of the namespace and specify the rest of the namespace in the code. If you specify the complete namespace, you can use the BinaryFormatter class name in the code without the namespace:

using System.Runtime.Serialization.Formatters.Binary;

Nitin1981 wrote:
2. Another thing how do you arrive at the conclusion by trial & error or is there some other way.

What conclusion?

---
It's amazing to see how much work some people will go through just to avoid a little bit of work.

Nitin198119-Dec-06 20:13

19-Dec-06 20:13

Hi I mean the difference between the syntax in c# and vb.net (for example in this case)

Thanks!

Don't Quit

Guffa19-Dec-06 21:05

19-Dec-06 21:05

You mean how I translate the code from VB to C#?

Basically I read the code and make sure that I understand what it does, then I write code that does the same thing. In .NET you have the advantage of the shared framework, which means that the classes used are the same and work the same.

---
It's amazing to see how much work some people will go through just to avoid a little bit of work.

Nitin198120-Dec-06 2:25

20-Dec-06 2:25

No I mean first (in your first reply of this question) you also guessed that code should be like this
IFormatter myFormatter = new Formatters.Binary.BinaryFormatter();
Which was also the case with me. But later you came to the conclusion we need to specify full path in c#.I think now I'm clear enough.

Thanks a lot

Don't Quit

Guffa20-Dec-06 4:13

20-Dec-06 4:13

Specifying the full namespace is a way that always work, regardless of what namespaces you have imported (provided of course that you have a reference to the dll containing the class). Once it works, you can start looking into writing the using statement that imports that specific namespace.

I don't develop anything in VB.NET, that's why I didn't remember the difference in how namespaces are used from the start.

---
It's amazing to see how much work some people will go through just to avoid a little bit of work.

Nitin198121-Dec-06 1:42

how to know the obscuring window

21-Dec-06 1:42

Ok Got it! Thanks for your expert opinion and I will try to implement them myself.

Thanks once again

Don't Quit

muharrem17-Dec-06 23:13

muharrem

17-Dec-06 23:13

Hi all,

How I can know that when my form is obscured by another window and name of that wimdow during run time?

Thanks,
Muharrem

FileCopy with ftp path

Martin#17-Dec-06 23:09

Martin#

17-Dec-06 23:09

Hello everybody,

I have to copy and delete a file by using a ftp path (ftp://xxx.xxx.x.x/mydirectory).
Is there a possibility in .Net1.1 without using a ftp-server?

Thank's for youre time!

Martin

Pete O'Hanlon17-Dec-06 23:36

Pete O'Hanlon

17-Dec-06 23:36

There is no direct FTP functionality in .NET1.1. As this is simply socket programming, you can roll your own or use something like this:

http://www.codeproject.com/cs/internet/ftplib.asp[^]

the last thing I want to see is some pasty-faced geek with skin so pale that it's almost translucent trying to bump parts with a partner - John Simmons / outlaw programmer

Deja View - the feeling that you've seen this post before.

Martin#17-Dec-06 23:42

Martin#

17-Dec-06 23:42

Thanks a lot!

Shajeel17-Dec-06 23:37

Shajeel

17-Dec-06 23:37

you dont need a ftp-server, you need a ftp client and there are some clients available in CP. here are some

http://www.codeproject.com/cs/internet/ftplibrary.asp[^]
http://www.codeproject.com/cs/internet/ftplib.asp[^]

Regards
Shajeel

how to set the value to exception object?

Martin#17-Dec-06 23:43

Martin#

17-Dec-06 23:43

Thanks a lot!

babutkchn17-Dec-06 23:05

babutkchn

17-Dec-06 23:05

Hi All,

Can anyone please tell me hoe to set the value to a custom exception object?

If so, pls give a code snippet?

thanks in advance

Regards
babu

Guffa17-Dec-06 23:18

17-Dec-06 23:18

What value?

You can create an Exception object with any message you like:

new ApplicationException("Nu sket det sig rejält, må jag säga.")

You can also create specific Exception objects for different kinds of errors. Some examples:

new ArgumentNullException("path", "The path argument may not be null.")<br />
new NullReferenceException("The operation resulted in a null reference.")<br />
new IndexOutOfRangeException("The position has to be in the range 0 to 9.")<br />

---
It's amazing to see how much work some people will go through just to avoid a little bit of work.

babutkchn17-Dec-06 23:35

babutkchn

17-Dec-06 23:35

but for this i've to set the value to the property in the class as follows.

this.Message = "msg"; or exception.Message="msg";

how to set that??

Colin Angus Mackay17-Dec-06 23:40

Colin Angus Mackay

17-Dec-06 23:40

Set the message property of the exception in the constructor.

Upcoming Scottish Developers events:
* Glasgow: Tell us what you want to see in 2007

My: Website | Blog | Photos