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To my understanding, you meant, "How to read and write .TXT file". If so,
// READ
string readContent = System.IO.File.ReadAllText(string fileName) // .txt File name.
//WRITE
System.IO.File.WriteAllText(string fileName, string contentToWrite)
/******* PLEASE check the spelling and verify before using this snippet as I typed here whatever I remember. *****/
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Is there a way to take a array of bytes and run those bytes as a program without saving them to any type of disk, only run those bytes form memory?
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Yes
As of how to accomplish this, have you ever tried Google? Failing that try ![Badger | [badger,badger,badger,badger...]](https://www.codeproject.com/script/Forums/Images/badger.gif)
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EscKey2004 wrote: d run those bytes as a progr
Are those array of bytes a .NET program? If so, yes, you can run them from memory using System.Reflection.Assembly.Load
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I have tried this I built a little test app that looks like this but I really did not get much of a response from the stuff I tried loading is there something I am doing wrong?
OpenFileDialog open = new OpenFileDialog();<br />
if (open.ShowDialog() == DialogResult.OK)<br />
{<br />
System.IO.FileStream st = new System.IO.FileStream(open.FileName.ToString(), System.IO.FileMode.Open);<br />
System.IO.BinaryReader br = new System.IO.BinaryReader(st);<br />
byte[] bytes = new byte[br.BaseStream.Length];<br />
br.Read(bytes, 0, bytes.Length);<br />
<br />
System.Reflection.Assembly a = System.Reflection.Assembly.Load(bytes);<br />
a.CreateInstance(a.GetType().ToString());<br />
}
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Are you getting some exception with that code? What exactly doesn't work?
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On some things I get a exception that looks like this, but then on some things it just dosent do anything.
"Could not load file or assembly '1453384 bytes loaded from asmTest, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format."
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i just started a socket application that recieves UDP data. The data that i am recieving is a netflow packet from cisco devices. to learn how to do this i have been searching the forums and looking at other people's code for reference. some code that i came across was the following. pretty much what you do is, passed a byte[2048] to the procedure ToUInt and specify the starting point to get the datafield in the byte and the length from that starting position to get. the first field in the packet is the version field which starts at position 0 and is 16 bits long. so you would end up passing to the following code the byte[2048] of your data buffer, 0 for your offset and 16 for your length. i understand mostly all of the code except that part there the Shift Right occurs and the ANDing against 0x0001.
b is 10, and then after the bitwise operations is it 5. which is the correct version number for the netflow packet that my application recieved.
public static uint ToUInt(byte[] datagram, int offset, int length) {
uint total = 0;
int byte_index;
int bit_offset;
int bit;
byte b;
for ( int i = 0; i < length; i++ ) {
bit_offset = (offset+i) % 8;
byte_index = (offset+i-bit_offset) / 8;
b = datagram[byte_index];
bit = (int)(b >> (7 - bit_offset));
bit = bit & 0x0001;
if ( bit > 0 ) {
total += (uint)Math.Pow(2,length-i-1);
}
}
return total;
}
i modified the code to print to a console the values of each variable during each iteration of the loop. here are the values.
i bit_offset byte_index b bit total
0 0 0 0 0 0
1 1 0 0 0 0
2 2 0 0 0 0
3 3 0 0 0 0
4 4 0 0 0 0
5 5 0 0 0 0
6 6 0 0 0 0
7 7 0 0 0 0
8 0 1 5 0 0
9 1 1 5 0 0
10 2 1 5 0 0
11 3 1 5 0 0
12 4 1 5 0 0
13 5 1 5 1 4
14 6 1 5 0 4
15 7 1 5 0 5
i relize that the byte_index is just a counter for how many bits you have iterated through. once you went through 8 bits, incriment the byte index by 1. since the length is 16, that is two bytes and that would account for 0, and 1. i is just the counter set to the length of 16. i don't understand the B, bit, and total values. could someone explain the logic behind this to me?
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I have added comments to part of the code:
bit_offset = (offset+i) % 8;<br />
<br />
byte_index = (offset+i-bit_offset) / 8;<br />
<br />
b = datagram[byte_index];<br />
<br />
bit = (int)(b >> (7 - bit_offset));<br />
<br />
bit = bit & 0x0001;<br />
<br />
total += (uint)Math.Pow(2,length-i-1);<br />
---
b { font-weight: normal; }
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hey thanks a lot. this is helpful
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Hi,
I am using VB Script by calling the script as a shell execution. Diagnostic.Process.Start(....)
But unofrtunately, the Process's EXITED event is not being fired ever. Looks like, the process is never being ended. Is there any reason why.
moreover, do I need to ship any pre requisite software to run VB Script along with my C# application to my client's Computer ?
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Hello
bashiwala wrote: I am using VB Script by calling the script as a shell execution. Diagnostic.Process.Start(....)
I don't have that experience with VBScript. What's the extension of the file of your script, and what program that actually excutes the code?
bashiwala wrote: But unofrtunately, the Process's EXITED event is not being fired ever
Well that means that the program didn't ended at all. It's up to the code that you wrote in that VBScript to end itself or go into an empty loop for example.
bashiwala wrote: do I need to ship any pre requisite software to run VB Script along with my C# application to my client's Computer ?
AFAIK scripting languages don't produce stand alone exe files. scripts like VB need to be excuted inside another program -eg. Access, excel, etc..-. What exactly does your script do? and what program excutes it?
Regards ![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
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Thanks for your reply.
My VB SCRIPT is being used to convert an HTML file to a MS Word file. the extension is .VBS and I found that, in Windows, if I double click the .VBS file, the file is being executed as if it were an .EXE file. So I am using Process.Start to run the VB Script within C# application. I did not find any easy free library in C# to convert from HTML to MS Word but I found a very small cute snipped in VB Script to do that and in fact the VB Script is working fine in my Windows XP. But I am not sure if I ship this script to my client's PC would that work in the same way or not.
I dont have good knowledge on VBScript, in fact I hate this VB language (sorry if I offended VB programmers.., I did not mean that) but I found good snippets in VBScript for doing so many works fast.
Regards,
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Hello
VBS files are opened using Windows Sripting srvice "C:\WINDOWS\System32\WScript.exe" file. It should be available in any windows edition. you can try to port it with your app, but I don't really recommend it.
About converting HTML to ms word, did you look into Office interop? Maybe there is something there.
About testing your apps, that brings me to Microsoft Virtual PC. You can download it for free via this link[^]. It enables you to install several windowses -XP pro, XP home, Me, etc...- inside yours, so that you could have a good idea on how your program would run on other pcs. Try it!
I hope that works for you! Good luck!
Regards
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Hello,
In my Win application (C#)
- I use dataset designer to design data tables.
- I am using SQL Server Everywhere 2005.
I want to store the connection string within the CODE as a string variable, instead of App.Config file. (In order to hide database password) and I want that, when the application is loaded, the data source connection string is retrieved from the Code instead of App.Config.
Is it possible ? if so, would anyone please show me the way.
- My code is protected as I am using Obsfucator, so keeping password in String is not a problem.
Thanks and regards,
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Hello
It's possible, yet it's a very BAD practice to hardcode your passwords in your exe file. A good practice is to store the password encrypted in an external config file -whatever it's-, then decrypt it in the code. Well, still breakable, but much harder than giving your password hardcoded on a silver plate to the disassembler.
Regards
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Hi Nader,
Thanks always for replying.....
Ok, as I understood that I can read the encrypted password from external config file to use in my code, but the problem is, I am using DataSet Designer to design my data tables. And when the application is loaded, the data source is always looking to my App.Config file directly to read the connection string to connect to the SQL Everywhere database. I did not find any way to redirect the data source request to some Code area instead of direct searching in App.Config file.
Thanks and regards
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Hello
Well, You can enjoy all the simplicity of working with the designer -never like it though;)-, and make the adjustments you need.
In the solution explorer, expand the MyDataSet.xsd file -where my dataset is the name of your dataset-, and double click on MyDataSet.Designer.cs.
In that file the connection string is loaded as this
this._connection.ConnectionString = global::MyProjectName.Properties.Settings.Default.MyProjectNameConnectionString;
In this line the program actually loads the ConnectionString from the App config file. This line is repeated several times in several initialization methods. Now my suggestion:
1- Make another encryptor project to encrypt the text of the password and store in the app.config file -you can browse for that-.
2- In the original project's designer file, search for the code I gave you -as I said it's repeated several times-, and write your decryption code after it, so that the connection string in the memory would have the real password.
I hope I didn't confuse you. To conclude:
1- Write an encryptor to encrypt the password -or the whole connection string- in the config file -or an external XML file, it's up to you-.
2- In the designer file, write the code to decrypt the connection string.
3- Make sure you do all this Sh*t after you have finished everything else in your project.
4- If you make changes in the designer all the decryption code you've written will be lost, so make sure to save it somewhere else as a backup.
5- Encrypt the app.config file of your release.
Regards
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Hi Nader,
You are great for providing helps...  This is the exact information I was looking for.
Thanks again.
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Hi Nader,
////////////////////////////////////////////////////////////////////////////
This is Emran as I had to sign up another account here with different user name because my previous Hotmail account is not taking any CodeProject Emails.
/////////////////////////////////////////////////////////////////////////////
I wish If I could become an expert like you so that I could also avoid DataSet Designer. But I was wondering what is the future of C# and what is the benifit of learning and learning more on this language as I found C OMEGA is coming to replace C#, and I will have to update myself again with the new language and it is a Race, isn't it ! 
Regards,
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Hello
it's nice to hear from you again Emran. It's been a while.
bashiwala wrote: I wish If I could become an expert like you so that I could also avoid DataSet Designer
I used the designer when I started out with ADO, and have used it for a while. Yet I didn't like it because it didn't give me the feeling of being in control. So, all I did was going through the code that the designer was writing for me. That's it. Just know what it is doing and do it yourself. Same way with any designer/wizard. Just have the habit of knowing what's behind the scenes, and then if you want control, do it yourself. If you want speed, let the designer do the work for you. You would have a choice then.
bashiwala wrote: I was wondering what is the future of C# and what is the benifit of learning and learning more on this language as I found C OMEGA is coming to replace C#
COmega is not a replacement for C#, rather it's an extension. Whatever you learn in C# will mostly benefit you in COmega. Computer programming actually is a heritage. I didn't become a good C# programmer until I did my homework in Assembly language. Going low level in programming will show you what really happens in your computer's memory. High level programming gives you fancy well organized human friendly code at the cost of performance. Most -including me- of those who help out in the C# forum have C++ backgrounds. I still use C++ for few things that couldn't be accomplished by C#.
Yes you have to keep up in the race and that isn't easy, but try to enjoy it and have fun learning new technologies. but if you really want to be something in that field you got to have some low-level programming experience. Again most of what I've learned in assembly did me a great help in C++ and both helped me greatly while going in C#.
If you don't want all that low-level crap headache, fine. You still can be a good programmer by sticking to C#. it isn't going anywhere soon. COmega is still in research and again, it's just an extension, not a replacement. If you were good in C# holding a grip of COmega won't be an issue.
Regards
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Thanks Nader,
I worked on INTEL 8051, Motorola 68HC12 microcontroller's Assembly language and designed real world hardware applications as I am an Electrical Engineer.
I used to like low level programming before but now I found that, there is no future engaging on that as the race is very fast. Hardware world is never stable and consistent even for 6 months.
So I choosed to become software developer which I found better stable and consistent.
My dream is to establish my own software company, now still a dream
Anyway, thanks for your time again..
Regards.
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You told me before that you are an electric engineer, but I didn't know that you had assembly background. not all electric engineers here in Egypt are interested in the soft part of the game .
Anyway, when I said assembly I meant that which is used with intel microprocessor -Intel 8086 I believe-. The idea is knowing how your program is stored and handled in the memory and on the harddisk. For example. Can you change the system time using C#? Can you access BIOS in C#? Can you get the serial number of a CD disk in C#? These and other tasks sometimes require that you go low-level.
The hardware field is never stable I concur, yet it's kind of biling up instead of totally changing. There are milestones -eg. Pentium technology-, but Pentium4 is very similar in programming to Pentium1 wih the exception of some new instructions. The same assembly that was used in the 80s still work now in 2006 with of course some modifications and adjustments.
In the software programming for example. I love the idea of the Garbage collector taking care of all the things I don't want to be too conserned with, yet that was at the expense of pointers. To use pointers in C# you have to make few unsafe code blocks. So nothing is for free. You were talking about the password hardcoded. As an assembly programmer, fetching that password from the compiled exe file, would be like reading it from a text file. Same thing with MSIL decompilations. Once you get the principle of Reverse engineering of code, you can decompile anything.
Stability is highly unavailable in any of the IT fields. Yet, updating and migrating is much easier than gaining the solid bases of a technology. Depending on what type of programming you are seeking, you should choose what type of languages you learn. If you are thinking about hardware programming for instance, C# -or even COmega-, isn't enough. If you are concerned more about databases, networking, and enterprise programming, stay with C#. It should be good enough, and for sure it's not going to be replaced for a long time.
I wish you success and providence in your company. Dreams come true fast these days. You don't even have to rent an office to make a company. All you need is a website, and some materials to start with.
Regards
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I always appreciate your time that you volunteer to help others. I do believe that, you will get return in rewards for these good attitude and helping mentality.
And thanks for giving me courage.
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I'm always happy to see you on the forum. Again this was just my opinion. I'm looking forward to seeing your company's website. Good luck.
Regards
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