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Hi, Tom. What does "move a 8 digit number from a byte array to an int" mean? In your solution you just sum up 8 numbers. You even can discard Convert.ToInt32().
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byte[] array = {0x0,0x0,0x15,0x75} = 1964310528 as Int32
however array[0] + array[1] + array[2] + array[3] = 138
byte[] array = {0x0,0x0,0x15,0x75};
MemoryStream ms = new MemoryStream(array);
System.IO.BinaryReader br = new System.IO.BinaryReader(ms);
int abc = br.ReadInt32();
A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."
-- Stephen Crane
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There is a better way instead of using MemoryStream.
See this:
byte[] array = { 0x0, 0x0, 0x15, 0x75 };
int abc = BitConverter.ToInt32(array, 0);
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I was just way too lazy to look. (Did I just admit ignorance?) Anyways, I only wrote the code to illustrate the example of the problem of the data of the binary array.
A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."
-- Stephen Crane
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Mind if I ask another Byte array question?
in my code:
<br />
private void WriteRecord(byte[] ByteBuffer, int TrackNumber, string recType)<br />
{<br />
SqlConnection myConnection = new SqlConnection(strConnect);<br />
try<br />
{<br />
String myBuffer; <br />
myBuffer = Encoding.UTF8.GetString(ByteBuffer, 0, ByteBuffer.Length);<br />
MessageBox.Show("My Buffer" + myBuffer);<br />
myBuffer.Replace("'", " ");<br />
myConnection.Open();<br />
SqlCommand myCommand = new SqlCommand("EXEC LA_SP_NYSPINRESPONSE '"+ recType +"', 'P', '"+ myBuffer +"', " + TrackNumber, myConnection);<br />
myCommand.Connection = myConnection;<br />
myCommand.ExecuteNonQuery();<br />
When I try to convert this byte array to a string then display it in a message box, I get nothing. The problem is that in this string there is a single quote i need to remove so that it will write properly to the database. Right now with it comes to that single quote it thinks it's the end of the string and errors out.
So is there a better way to convert a byte array to a string?
Thanks
Tom
Tom Wright
tawright915@gmail.com
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quick question. Using Console.WriteLine I have use the syntax:
Console.WriteLine("my string = '{0}'", new objects[] { str } );
where /str/ gets inserted into the {0} placeholder.
How do I use similar syntax when I'm just building a string to return from a method?
Thx.
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return String.Format("my string = '{0}'", new objects[] { str } );
"Just about every question you've asked over the last 3-4 days has been "urgent". Perhaps a little planning would be helpful?"
Colin Angus Mackay in the C# forum
led mike
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This is not an answer but just a recomendation. You can use more simple and more quick way:
Console.WriteLine("my string = '{0}'", str);
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I have an application where a datagrid populates based on a part number. The user can enter new items to the datagrid via dropdown boxes and text fields.
What I want to know how to do, is that if a certain choice from the drop-down box already exists in the database, no longer make it an option in the drop down box.
For example, three types of costs populate in drop down box
Cost 1
Cost 2
Cost 3
User chooses Cost 2 and enters. Datagrid populates and shows the Cost 2 entry.
Now the user wants to enter another type of cost, but there should never be two types of costs for the same part number, so now I want the drop down box to show
Cost 1
Cost 3
Is this possible?
Thanks!
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leckey wrote: Is this possible?
Should be. If you can write a query to produce the database results then add that as a "view" (SQL Server) and bind that to the drop down box. Of course you have to rebind every time the user changes the result of the query.
"Just about every question you've asked over the last 3-4 days has been "urgent". Perhaps a little planning would be helpful?"
Colin Angus Mackay in the C# forum
led mike
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Hi guyz,
Im looking for an article or (free) library for creating text effects (like shadows, glass text and so on) and/or the same thing for images/bitmaps.
Unfortunatly I couldnt find anything such this on this board :-/
You know any of this things ? I would appreciate for a answer.
best regards,
Pawel
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Thank you very much, that is what I was looking for, strange I couldnt find it myself :-|
Best regard,
Pawel
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Hi,
My client requires the ability to download files from a remote Web server to up to 30 individual client desktop/laptop machines which could be any where in the country. A similar uploading requirement is also being requested.
To understand the WebRequest/Stream issues/handling in C# I have written a standalone Windows Application that successfully streams both data and files from the server that can be saved to the clients hard disk and used as required. I have also produced code that does the uploading process as well.
However all of these are driven from the client machine, ie: the user clicks a button on a client machine, a connection is made with the server and the upload/download process occurs once complete the client closes the connection. I am now moving this process on to use WebServices.
My question is this can WebApplications/WebServices be integrated/designed to allow the following scenario when downloading a file to the client:
1. User browses web pages on normal web site.
2. User sees file they wish to download to their OWN client machine.
3. User clicks link that finds file on server.
4. File streamed into suitable format.
5. Web server then either (i) calls local Web service running on its own machine and this web service is then able to contact the CORRECT client machine to stream the file/data to. Finally the web service on the web server closes the connection with the client. Or (ii) web server is able to call the client machine direct and stream the data/file etc...
[ Note: The upload process will still be driven by the client ]
Can any one advise whether this is possible with .NET..., any issues involved and possible examples/starting points.
I Have asked this on another newsgroup and not received an answer suggesting this is not possible.
Thanks in advance
Andrew
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1-4 are standard procedures involved in downloading a file from a website.
As for #5, it doesn't work that way. It is the client that initiates contact with the server. After all how would the server know which of the millions of machines on the net to connect to?
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Just as always, if this has already been discussed, just point me in the right diirection.
Whenever I try to do my file IO (for any program I've ever done), it turns out that I can also just open up the files in notepad and see (and edit) the contents just fine. I would like help in figuring out how to make my files not human-readable when opened in Notepad. I want to make it so that a user must use my program to modify the files it creates (to ensure the file obeys my file specs).
I'm familiar with the basics of file IO (I generally use StreamReader/ReadLine and StreamWriter/Write for ease and convenience), but I guarantee there are a few people on this forum that know a lot more than me!
-Daniel
Typing too fast fro my owngood
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You can use BinaryFormatter to change from your object to binary file.
Or if you want to create the file / format of your own, then
use BinaryWriter or BinaryReader.
Or if you want to take the best way is to encrypt the file.
See this one:
http://www.codeproject.com/dotnet/CryptoLib.asp
After you create your file, you must encrypt it.
If you want to open it, then first decrypt then open.
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Hashing of the file is a good way to quickly check for changes.
A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."
-- Stephen Crane
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I'm not sure what checking for changes would do for me. I already do that in the GUI. What I'm looking for is a way to write out the contents of the file so that it can't be read/edited in Notepad (at least, not without hosing it). You know, like when you rename an exe to txt and look at it in Notepad? Or, when you open an xls file in Notepad? I want my plain-text file to look like that goble-dee-guke, instead of looking like readable text.
-Daniel
Typing too fast fro my owngood
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When your file is in binary format there is no quick way to validate that it is indeed accurate. Your application could execute assuming correct data. Having the hash will allow you to verify that if the file was changed at least it was changed by some one with enough knowledge to recompute the hash correctly. In a robust system knowledge of errors is half of the problem.
I don't understand what is not to be impressed about RE Binary Readers and Writers, however. They seem like fairly simple to use streams.
A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."
-- Stephen Crane
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I think I remember trying BinaryWriter and BinaryReader and not being impressed... maybe it has to do with what flavor of Write() I was calling...
I'll look deeper into BinaryWriter/Reader, and I'll look into what BinaryFormatter would do for me...
As far as encryption, I didn't want to go that far.
Thanks for the tips!
-Daniel
Typing too fast fro my owngood
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Encryption is the best way. There are a lot of ways to do it. Also you may store a checksum at the end of the file and verify if the file was modified using checksum.
The BinaryWriter/BinaryReader option don't like me. It's not very safe.
I'm on a Fuzzy State: Between 0 an 1
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Hi All,
I'm currently designing an "n tier" app to help manage my company's functions (incidentally, if you're wondering why they let a n00b like me at a project like this, there's only 5 of us and I once saw a computer back in 1985  )
I've broken it down into three layers, as per the advice from various guru's hither and thither: the data layer, the business logic layer and the client layer.
Now the data layer and client layer are within my experience - the data sits on a SQL Server server and the client layer is the app I write for the users.
Where I come unstuck is with the BLL. Where on earth should this go? On the ASP.Net forums I read an article about how you should implement the BLL as a serperate Class Library project (my app will be Win forms, but hopefully having a BLL gives me the option of doing some web stuff later if I can be bothered). All well and good so far...
...but where do you put this class library once it's finished? Distributing it with the client app seems a bit pointless, as any updates mean users have to reinsatll or whatever. This leads me to the conclusion I need to put it on a server soemwhere: but if I do this, how do I make the client app aware that it should be referencing these dll's? Can I just add them as project references and let .net handle the location when the app is distributed? Do I need to implement the whole BLL as a webservice? Also, as for performance, if the BLL is located on another computer, does this mean that it executes on the server, or is it downloaded and run on the client?
Any tips, articles, guides appreciated 
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Web services have provided the best abstraction for middle-tier architecture that I have seen. Depending on the number of users and the difficulty up updating you may be able to get away with your middle-tier class library existing on client machines (poor man's 3 tier apps)
A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."
-- Stephen Crane
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