C# Discussion Boards - CodeProject

Re: about MS Word and RichText Editor

31-Jan-06 23:05

Hi Ant Htoo,
I was excited to see the topic you posted. i am eagerly looking for solutions to display MS Word Document in RichText Editor. Can you give me any clue link or easy Code snippet for that ?

Thanks
Emran

RobertChan200031-Jan-06 23:34

RobertChan2000

31-Jan-06 23:34

Hi Emran,
Im my case, I try to display rtf files not MS Word files in RichTextBox. Here is code snippet for that.
FileStream fs = new FileStream(fileName, FileMode.Open);
richTextBox1.LoadFile(fs, RichTextBoxStreamType.RichText);

But it cannot display MS Word file. I don't know is there any ActiveX control or .NET Control to display MS Word Documents. But the similar problem we have solved is to display Power Point files in the application. In that case we convert them into html files and display in the application. We can create PowerPoint object in the application and load the PPT file and convert it into html file from application. Just like Save As html. In you case, you can do the same thing.

Ant.

Re: about MS Word and RichText Editor

emran8341-Feb-06 1:21

Launching email client programmatically with attachments

1-Feb-06 1:21

Thanks Ant. I got the Idea.

NewbieDude31-Jan-06 21:37

NewbieDude

31-Jan-06 21:37

I would like to launch my mail client (outlook or norvell for e.g.) from my application, some guys suggested this code:

System.Diagnostics.Process.Start("mailto:someone@foo.com?subject=TEST&body=SOMETEXT&attachment=C:\\outtall.pdf");

but it just ignores the attachment and opens a new email with just the subject and body filled out

anyway got a clue?

Re: Launching email client programmatically with attachments

leppie31-Jan-06 22:10

leppie

31-Jan-06 22:10

You need to escape the url.

Look at System.Web for utility classes Smile | :)

xacc.ide-0.1.2 'Milestone' - includes full source
Now supporting 24 languages including F#, FreePascal/Delphi and VB.NET

Re: Launching email client programmatically with attachments

NewbieDude31-Jan-06 22:16

NewbieDude

31-Jan-06 22:16

I am very new to C# and I am strugging, could you perhaps give me the code, I am unsure of where to look etc?

Re: Launching email client programmatically with attachments

Kodanda Pani31-Jan-06 22:11

Kodanda Pani

31-Jan-06 22:11

Hi,

Guess the following link will help you.

http://dotnet247.com/247reference/msgs/49/245383.aspx

Thanks and Regards
Pani

Re: Launching email client programmatically with attachments

Colin Angus Mackay31-Jan-06 22:14

How to make video streaming server?

31-Jan-06 22:14

Will nobody think of the Clicketies[^]

ColinMackay.net
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

Divyang Mithaiwala31-Jan-06 21:18

Divyang Mithaiwala

31-Jan-06 21:18

Hello All,

I design a server which can do audio & video streaming which is captured by different media player.

I complate audio section. But I don't know how to do video streaming. Can I anybody know how to do this. Plz help me as soon as possible.

regards,
Divyang Mithaiwala.

xacc.ide-0.1.2 'Milestone' - includes full source
Now supporting 24 languages including F#, FreePascal/Delphi and VB.NET

leppie31-Jan-06 22:12

leppie

31-Jan-06 22:12

MS recentedly released their new WMEncoderSDK.

Divyang Mithaiwala31-Jan-06 22:53

Divyang Mithaiwala

31-Jan-06 22:53

hello leppie,

I see your link bu they provide complate software not any tool that we can use via C#.Net.

Dave Kreskowiak7-Feb-06 12:53

Dave Kreskowiak

7-Feb-06 12:53

You said you can't use that SDK in C#?? Hmmm...I guess those C# examples in the documentation are just a dream then.

I guess the "SDK" part of that name doesn't stand for Software Development Kit.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

BLOB Email Attachment (MS Word) from SQL

Divyang Mithaiwala7-Feb-06 17:41

Divyang Mithaiwala

7-Feb-06 17:41

Sorry sorry sorry Dave,

I am very sory. Because i go to wrong Link. & I found nothing which is telling by you.

Any way I got that SDK. & It is very usefull to me.

Thank you very much

Regards,
Divyang Mithaiwala

emran83431-Jan-06 21:18

31-Jan-06 21:18

Hello all, Can you provide me any good article or Available Control's Resource Website to Perform Email Attachment (BLOB : MS Word) Directly from MS SQL Database ( Windows Form ) in C# ?

Reverse Engineering

emran83431-Jan-06 21:15

31-Jan-06 21:15

Hi ,
Recently I read an article and I came to know that, C# application actually is an Assembly which can be easily DisAssemble with some software and people will be able to see the source code. If it is true, then, is C# is kind of a HTML language which is open for all ? or There is really some way I can wish not to disclose my Source Code. Moreover, If I make my Application to check a Liscence Serial number to verify genuine User, The pirator can DisAssemble my Assembly and See the Serial number part of the code and fool the software, right ? So, What is the solution ?

Emran

-- modified at 3:19 Wednesday 1st February, 2006

Colin Angus Mackay31-Jan-06 22:12

31-Jan-06 22:12

emran834 wrote:
C# application actually is an Assembly which can be easily DisAssemble with some software and people will be able to see the source code

All .NET applications (whether they are written in C#, VB.NET or whatever) compile to MSIL. The .NET Framework SDK comes with an application called ILDASM that disassembles this IL code.

There are some tools, such as Reflector for .NET[^] that will generate C# code that looks somewhat similar to the original.

emran834 wrote:
If it is true, then, is C# is kind of a HTML language which is open for all ?

No, it is nothing like HTML. For a start you cannot edit it in a text editor. However, it is open and it can be read with a suitable application. It needs to be for things like reflection to work.

emran834 wrote:
There is really some way I can wish not to disclose my Source Code

You can use things like obfuscators to make it more difficult. But rememeber that even native assemblies can be disassembled. The bottom line is that the application code will have to be readable at some point in order for the computer to actually run it. There is no solution that will work in its entirity - only solutions that make it more difficult.

emran834 wrote:
If I make my Application to check a Liscence Serial number to verify genuine User, The pirator can DisAssemble my Assembly and See the Serial number part of the code and fool the software, right ?

If it is a serial number then are you compiling a different version of the software for each and every user? I think you really need to think about your licence management strategy a bit better. You may want to think along the lines of producing an digitally signed encrypted file that your application can decrypt and verify came from a genuine source.

ColinMackay.net
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

-- modified at 4:12 Wednesday 1st February, 2006

emran83431-Jan-06 22:59

31-Jan-06 22:59

Hi Colin Angus Mackay,
Thank you for clearing my concepts. Ok, I have a confusion. Is it really possible for anyone to modify my distributed program in his own way and start reselling it ? I mean, he can do reverse Engineering and get the code and change the CopyRight Infor into his name and modify anything he wants ?

About Liscence matter, I am planning to distribute my software and user will have to be registered in my website. And then, everytime he use the software, software will connect to internet and send the User's Id number, and my Online PHP program will check if the ID is a Valid User, if So, then PHP will send back Position Permission to run the software. And Software will wait for the response from Website. Once Website confirms then it will run. So, Is this way safe way to protect my software or someone can modify the software so that the software will not need to wait for Website Response to Run.

Thanks and regards
Emran

-- modified at 4:59 Wednesday 1st February, 2006

Colin Angus Mackay31-Jan-06 23:26

31-Jan-06 23:26

emran834 wrote:
Is it really possible for anyone to modify my distributed program in his own way and start reselling it ? I mean, he can do reverse Engineering and get the code and change the CopyRight Infor into his name and modify anything he wants ?

Yes, and that applies equally for any application regardless of how it was developed or the operating system it runs on (or even if it is the operating system). Obfuscators just slow down an attempt to do this.

emran834 wrote:
And then, everytime he use the software, software will connect to internet and send the User's Id number, and my Online PHP program will check if the ID is a Valid User, if So, then PHP will send back Position Permission to run the software.

And if the user doesn't have an internet connection at the time they run the application? There are also privacy issues to deal with. Will users agree to have the application call home each time it is run? They could consider it a breach of privacy.

emran834 wrote:
So, Is this way safe way to protect my software or someone can modify the software so that the software will not need to wait for Website Response to Run.

Yes, it would be possible (although improbable) that someone might modify the software to bypass this. So far, there hasn't been any licence manager that hasn't been cracked by someone.

The way I see it is that a licence manager is just a device that slows down potential software pirates and irritates genuine customers by you treating them like criminals.

As I mentioned there could be a licence file that contains details of the licence, how long it is valid and so one. This would be digitally signed (so the application would know it comes from you) and would be encrypted. This would be a one time action (or once per licence period). The file would be encrypted with a public/private key. You hold the private key, everyone has the public key (so everyone can decrypt the licence file - this is just to prove the authenticity of the file). The file would also contain a hash value (the digital signature) which shows that the file has not been modified or tampered with. If a cracker wants to create their own licence file then they would have to find the private key (which you never give out). It doesn't matter that anyone can read the file as to modify it they would need the private key.

This is what I would see as a reasonable compromise. The bottom line is that all the security measures you put in place to keep your application out of pirates' hands cost you money. How likely is it to be pirated? Who are your user base? How much are you charging for the software?

ColinMackay.net
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

emran8341-Feb-06 2:03

1-Feb-06 2:03

Hi Colin Angus Mackay,
Thanks for your reply with valuable information. So, it tooks like, only digitally signed liscence file is an efficient way to give the pirator Hard Time. Would you please show me any URL of an Article about how to perform this operation , I mean how to make Digitally Signed liscence key, Private Key, etc.

Thanks again.
Emran

Colin Angus Mackay1-Feb-06 2:26

1-Feb-06 2:26

emran834 wrote:
So, it tooks like, only digitally signed liscence file is an efficient way to give the pirator Hard Time

Not the only way, just the way that I would suggest is a balance of costs and effectiveness.

emran834 wrote:
Would you please show me any URL of an Article about how to perform this operation , I mean how to make Digitally Signed liscence key, Private Key, etc.

The best souce I've come across is actually from a book: C# Data Security Handbook[^] - It is quite a complex area (which is why many people buy pre-built licence managers) but the book does a very good job of building up knowledge from little or no existing knowledge of cryptography.

ColinMackay.net
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

emran8341-Feb-06 9:08

1-Feb-06 9:08

Hi Colin,
Thanks for the kind information for telling me about the right book. Otherwise i would have needed to spend and experiment hours to select the right book. Although I was Surprised why this book is out of print from Amazon.

By the way, What is the PRE BUILT LISCENCE MANAGER Solution !. If I can just get it then I dont need to reinvent the wheel by learning so complex theory, right ? So, will you please give me a link about a PreBuilt Liscence Manager, it would be great !

Thanks and regards, for your time.

Emran

Colin Angus Mackay1-Feb-06 11:25

1-Feb-06 11:25

emran834 wrote:
Although I was Surprised why this book is out of print from Amazon.

Just lucky for the Amazon Marketplace as that is where I got my copy from. And, although my experience with the Amazon Marketplace is that it normally takes two weeks for the book to actually arrive, in this case I ordered it at 15:00 one day and it was on my desk by 09:00 the following morning.

emran834 wrote:
What is the PRE BUILT LISCENCE MANAGER Solution

I mean buying in a solution from a company that specialises in that sort of thing. (I'm surprised they don't advertise here on code project because their adverts are all over printed software development magazines.) Anyway, here are a few (I cannot vouch for any as I have not used them):
* DES Key[^]
* Aladdin[^]
* Sentinel[^]

emran834 wrote:
If I can just get it then I dont need to reinvent the wheel by learning so complex theory, right ?

I'd still recommend getting the book (even if you just read the introductory chapters) as you will at least gain a broad overview of encryption and data security in .NET so you know what is available should you ever need to use it.

ColinMackay.net
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucius
"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

emran8341-Feb-06 18:21