Re: Seeking a binary read/write file stream class [modified] - .NET (Core and Framework) Discussion Boards

Re: Seeking a binary read/write file stream class

Luc Pattyn28-Oct-10 15:57

28-Oct-10 15:57

I know you don't like Convert class much, however this seems an opportunity for using BitConverter[^] rather than unsafe code.

Smile | :)

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Re: Seeking a binary read/write file stream class

PIEBALDconsult28-Oct-10 16:57

PIEBALDconsult

28-Oct-10 16:57

Luc Pattyn wrote:
I know you don't like Convert class much

Is it that obvious?

I don't see Guid, or DateTime, or other types I may want in the future.

Guid has a ToByteArray method I tried out.

But I also need to convert back from byte array to the type as well.

Re: Seeking a binary read/write file stream class

Luc Pattyn28-Oct-10 17:14

Luc Pattyn

28-Oct-10 17:14

Did your Google license expire? Laugh | :laugh:

http://msdn.microsoft.com/en-us/library/90ck37x3.aspx[^]
http://msdn.microsoft.com/en-us/library/system.datetime.tobinary.aspx[^]
http://msdn.microsoft.com/en-us/library/z2xf7zzk.aspx[^]

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Re: Seeking a binary read/write file stream class [modified]

PIEBALDconsult28-Oct-10 17:21

PIEBALDconsult

28-Oct-10 17:21

Bing showed me a few things... like GCHandle... and a CodeProject article that was no help.

(Those were no help either, by the way.)

Pointers UNDOCUMENTED[^]

Fast Binary File Reading with C#[^]

Generic BinaryReader and BinaryWriter Extensions[^]

Reading Unmanaged Data Into Structures[^]

None of these have all the pieces put together.

This[^] one (on that other site) was most helpful.

Those got me as far as I am, but there should already be something out there...

modified on Friday, October 29, 2010 1:06 AM

Re: Seeking a binary read/write file stream class

_Erik_29-Oct-10 3:10

_Erik_

29-Oct-10 3:10

I remember some years ago I tried something similar just for fun. I used reflection recursively to reduce the object to its minimal parts and then writting its binary data was far easy.

For example, Guid data is hold by some private fields: _a (int); _b and _c (short); _d, _e, _f, _g, _h, _i, _j and _k (byte). So, to binary write a Guid I retrieved its private fields (which are of, let's say, simple types) and values through reflecton and then wrote the data to the stream. Deserializing was the reverse process.

Recursion had to be used when the fields were not of simple types.

It was quite tricky (and funny) to develop that, but after making it work I lost interest on it and, unfortunately, I lost the code as well, but maybe this suggestion can help.

Re: Seeking a binary read/write file stream class

PIEBALDconsult29-Oct-10 3:27

PIEBALDconsult

29-Oct-10 3:27

That might be needed for classes and some structs, but I don't plan on going that far at this time.

What I have now works for Guids and I'll exercise it some more today.

Re: Seeking a binary read/write file stream class

Andy Brummer3-Nov-10 18:19

Andy Brummer

3-Nov-10 18:19

If you are only doing your own data structures and are willing to use unsafe code. Marshal.StructureToPtr will give you that old school C feel. However I think just using binary reader and writer were faster.

Curvature of the Mind

Re: Seeking a binary read/write file stream class [modified]

PIEBALDconsult7-Nov-10 4:44

PIEBALDconsult

7-Nov-10 4:44

Andy Brummer wrote:
binary reader and writer

That's not read and write.

What I have now supports random access, plus:

[PIEBALD.Attributes.EnumDefaultValue((byte)SupportedType.Unknown)]
public enum SupportedType : byte
{
    Unknown
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Byte))]
    Byte
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.SByte))]
    SByte
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Int16))]
    Int16
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.UInt16))]
    UInt16
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Int32))]
    Int32
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.UInt32))]
    UInt32
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Int64))]
    Int64
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.UInt64))]
    UInt64
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Single))]
    Single
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Double))]
    Double
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Decimal))]
    Decimal
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Guid))]
    Guid
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Boolean))]
    Boolean
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.DateTime))]
    DateTime
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Char))]
    Char
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.String))]
    String
,
    [PIEBALD.Attributes.TypeTransmogrifierAttribute(typeof(System.Enum))]
    Enum
}

Oh, and if the type is unknown, it tries the GCHandle technique anyway -- which works for some other types.

modified on Sunday, November 7, 2010 10:54 AM

help needed

rksreadero28-Oct-10 8:52

rksreadero

28-Oct-10 8:52

I am writting a code in vb.net, How can i convert it into the similar code in c#?

Re: help needed

Luc Pattyn28-Oct-10 9:07

Luc Pattyn

28-Oct-10 9:07

you are new here, and should read the forum guidelines; see "how to get an answer" on this page.

"help needed" is not informative. That is a reason why your earlier posts got down-voted.

why do you write in VB.NET if you need C#? do you know C# at all? if not, forget it (i.e. study it thoroughly or don't use it at all).
there are converters, some big, good, expensive; and some small and free, like this one[^].

Smile | :)

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Re: help needed

kadaoui el mehdi28-Oct-10 11:19

kadaoui el mehdi

28-Oct-10 11:19

you must learn C#, there is no other solution to your problem!

Re: help needed

Pete O'Hanlon28-Oct-10 11:34

Pete O'Hanlon

28-Oct-10 11:34

Isn't there? What about the automatic code converters? How do you think that Reflector works?

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

My blog | My articles | MoXAML PowerToys | Onyx

Re: help needed

kadaoui el mehdi28-Oct-10 11:39

kadaoui el mehdi

28-Oct-10 11:39

Reflector decompiles an assembly to .net language C# or VB.net or MSIL,
and the "there is no solution" means "to encourage him to learn c#" Wink | ;)

Re: help needed

Pete O'Hanlon28-Oct-10 11:47

Pete O'Hanlon

28-Oct-10 11:47

Then that's what you should say to the OP. As he's inexperienced, he may just take you at your word.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

My blog | My articles | MoXAML PowerToys | Onyx

Re: help needed

kadaoui el mehdi28-Oct-10 11:49

kadaoui el mehdi

28-Oct-10 11:49

Re: help needed

TweakBird28-Oct-10 23:38

TweakBird

28-Oct-10 23:38

See the below links

http://www.developerfusion.com/tools/convert/vb-to-csharp/

http://www.dotnetspider.com/convert/Vb-To-Csharp.aspx

these are the online tools for convert code Vb.Net to C#.

Re: help needed

Pete O'Hanlon29-Oct-10 0:40

Pete O'Hanlon

29-Oct-10 0:40

If you are using VS2008, you can download the MoXAML PowerToys referred to in my sig, and run the BabelCode functionality there to convert from C# to VB.NET or vice versa.

I have CDO, it's OCD with the letters in the right order; just as they ruddy well should be

Forgive your enemies - it messes with their heads

My blog | My articles | MoXAML PowerToys | Onyx

Re: help needed

thatraja28-Jan-12 5:03

thatraja

28-Jan-12 5:03

Hi, Check this blog post .NET Code Conversion[^]

thatraja

FREE Code Conversion VB6 ASP VB.NET C# ASP.NET C++ JAVA PHP DELPHI | Nobody remains a virgin, Life screws everyone Sigh | :sigh:

Tag-object, use of memory, dispose

Load_error28-Oct-10 6:49

Load_error

28-Oct-10 6:49

Hi All!

In C# ,VS2010 :
Let's say I assign a tag-property for a TreeNode-object with an IShellFolder-object. What do VS really store in the Tag-property? Do the framework hide all the gruesome memoryhandling for me and internally just store a pointer to the IShellFolder-object, or do the memoryuse just increase the further I recurse into the Folder-tree?

I have been programming for some years, but have no formal education on computing, except for some MCP-courses.

Someone knows what I should read or some good sources for explaining this?

TIA, Load_error

------
On Error Goto Hell

Re: Tag-object, use of memory, dispose

Luc Pattyn28-Oct-10 9:10

Luc Pattyn

28-Oct-10 9:10

IMO you should learn a language, or any new technology, from a book you buy and study; and study again one year later. Memory management is pretty automatic in .NET

Smile | :)

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Re: Tag-object, use of memory, dispose

Load_error28-Oct-10 11:47

Load_error

28-Oct-10 11:47

Well, to reduce the memory-footprint is not just a matter of reading, it is (together with memory-leaking and multithreading) some of the stuff I find most difficult to debug (like the half-assed CLR-implementation GC, what does it really collect?!? What should I release with Marshalling, etc ?!?).

Desktop developers have got a christmaspresent from MS every time they release a new OS, like they think "how to break any existing code" every time...

I started out in the VB3 days (Win95 / -stuff), and seem to re-create libraries for (almost) the same things over and over again.

Your answer did not help much, either...

Regards, Load_error

Re: Tag-object, use of memory, dispose

Luc Pattyn28-Oct-10 12:09

Luc Pattyn

28-Oct-10 12:09

Books have been devoted to the subject of garbage collection, as it is a popular research topic. As you haven't made clear what knowledge you have of the subject, it is hard to provide reference material at the right level. Here are some pointers nevertheless; please make sure you understand reference types before you even enter the GC documentation.

http://msdn.microsoft.com/en-us/magazine/bb985010.aspx[^]
http://blogs.msdn.com/b/ricom/archive/2004/11/29/271829.aspx[^]
http://msdn.microsoft.com/en-us/magazine/cc300474.aspx[^]

If that is insufficient, clarify your quest, and come up with more specific questions.

Smile | :)

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Save Email To Sqlserver2005 Database using C#

Rachit Barjatya28-Oct-10 4:37

Rachit Barjatya

28-Oct-10 4:37

can some one help me to save the email sent by a user to my email id, in a sql server 2005 database.

Re: Save Email To Sqlserver2005 Database using C#

_Erik_28-Oct-10 5:38

_Erik_

28-Oct-10 5:38

Maybe. Have you actually tried something? If so, what have you tried and where are you experiencing problems?

Re: Save Email To Sqlserver2005 Database using C#

Rachit Barjatya29-Oct-10 2:48

Rachit Barjatya

29-Oct-10 2:48

yes.. i have done something like ..

TcpClient tcpclient = new TcpClient();
tcpclient.Connect("pop.gmail.com", 995);
System.Net.Security.SslStream sslstream = new SslStream(tcpclient.GetStream());
sslstream.AuthenticateAsClient("pop.gmail.com");
System.IO.StreamWriter sw = new StreamWriter(sslstream);
System.IO.StreamReader reader = new StreamReader(sslstream)

but i m not getting the exact data

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