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Guffa wrote: Where do you get the byte array from in the first place?
void ReadFile(string filePath, long length)
{
string text;
using (FileStream fsReader = new FileStream(filePath, FileMode.Open, FileAccess.Read)
{
byte[] byteArray = new byte[length];
fsRead.Read(byteArray, 0, length);
}
RTB.Text = text;
}
Guffa wrote: Why is it that you don't know how the text was encoded?
User can open any files (*.*)
--A non-related question: Are non-text files (*.exe, *.mp3, *.avi, ...) have any encoding?--
Guffa wrote: There is no simple way that can handle any encoding.
Thanks a lot. It seems I should use that article[^] to get the file encoding, no problem 
Thank you again.
When you're alone in the Dark, Fear will protect you...
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Pedram Behroozi wrote: fsRead.Read(byteArray, 0, length);
That doesn't work properly. The Read method returns the number of bytes that was actually read, and that may be less than the bytes requested. If you ignore the return value, you may get a partly read file and an array full of garbage.
You can use the File.ReadAllBytes method to read the file:
byte[] byteArray = File.ReadAllBytes(filePath);
Pedram Behroozi wrote: Are non-text files (*.exe, *.mp3, *.avi, ...) have any encoding?
No. As they are not text that is encoded into bytes, they don't have any encoding.
Part of the files may contain data that is encoded text, though. An mp3 file can for example contain an id3 block that contains text.
Pedram Behroozi wrote: It seems I should use that article[^] to get the file encoding
No, that article is about selecing an encoding to use to encode a text, not determining how text was encoded.
To determine the encoding you should start by looking for a BOM (byte order mark) at the beginning of the file. If there is one, it's a unicode file, and you can determine the encoding from the BOM. Otherwise it's either an ASCII or ANSI file. You should look for bytes with a value above 127 to determine what special characters are used and try to guess the encoding from which characters you expect there to be. If there are no codes above 127 you can use the ASCII encoding to decode the file.
Despite everything, the person most likely to be fooling you next is yourself.
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Oh, you helped me a lot. A million Thanks Guffa 
[Edit]
I read your reply over 5 times, really nice explain. Thank you again.
When you're alone in the Dark, Fear will protect you...
modified on Wednesday, November 12, 2008 12:12 PM
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5ed!
I am surprised to see the depth of your knowledge. You are great.
Guffa wrote:
To determine the encoding you should start by looking for a BOM (byte order mark) at the beginning of the file. If there is one, it's a unicode file, and you can determine the encoding from the BOM. Otherwise it's either an ASCII or ANSI file. You should look for bytes with a value above 127 to determine what special characters are used and try to guess the encoding from which characters you expect there to be. If there are no codes above 127 you can use the ASCII encoding to decode the file.
Where can I learn such kind of things? Is there a webpage or books available?
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I want to show the text from a ListView subitem in a ToolTip when the user puts the mouse over a row.
I have:
void diaryListView_MouseMove(object sender, MouseEventArgs e)
{
ListViewHitTestInfo lvhti;
lvhti = diaryListView.HitTest(e.X, e.Y);
if (lvhti.Item != null)
{
ListViewItem item = diaryListView.GetItemAt(e.X, e.Y);
string notesText = item.SubItems["Notes"].Text;
}
}
but I have the error "Object reference not set to an instance of an object" for the line: string notesText = item.SubItems["Notes"].Text;
What should I have done to correct this please?
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Firstly, why are you doing ListViewItem item = diaryListView.GetItemAt(e.X, e.Y);? Can't you just use lvhti.Item?
The error means that an object you are trying to use is null.
Item could possible by null, (although I suspect that is unlikely because you did a hit test first, and checked that for null).
More likely is that the item does not have a sub item called notes.
if (lvhti.Item != null)
{
if (lvhti.Item.SubItems.ContainsKey("Notes"))
{
String notesText = notesItem = lvhti.Item.SubItems["Notes"].Text;
}
}You should check that the subitem you are looking for exists first.
Simon
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Many thanks for your reply Simon. I've referenced the SubItem by index, rather than name, and it works fine. Although I'm not sure why referencing it by its name does not work.
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Check that you have got the name exactly correct including the correct case. Check you are setting the key correctly when you create the subitem.
(If it's still not working, post the code where you create the items and sub items)
Simon
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Hi,
I've created a borderless form which is custom located at point(0,0) (the top of the desktop).
the form size is; height: 26px, width = screen width.
my case is when I open another application (i.e. msWord) the top of the msWord window (Title, Grabbing aria, close, min, max buttons) is hidden behind my topmost form.
How can I setup my form to act like the taskbar; which will not allow the new application window to load behind the bar?
tnx
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leeoze wrote: How can I setup my form to act like the taskbar; which will not allow the new application window to load behind the bar?
You need to register your application as an AppBar for this to happen. See this[^] MSDN article and this[^] CP article.
/ravi
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hi,
I have made an application in which i am recording phone call using voice modem in my personal computer,now i want to make answering machine like in call center ,ex.. press 1 for change language. press 2 for recharge like that any idea???
Thank's
jugal
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Modern telephones use Dual-tone multi-frequency (DTMF)[^] signals to represent the numbers.
You need to play your message "Press 1 for this, Press 2 for that" and then listen to the incoming signal. You need to processes the signal and determine the low frequency portion and the high frequency portion. You can then determine the number (Keypad[^])
(You should also make sure you handle the case that the user doesn't have a DTMF telephone. There are other methods like pulse dialling, which are rarely used any more, but probably still exist. Just have a default selection if no tones are detected)
Simon
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I want to get the row index when I hover a datagrid.
I use the mousehover event but can't seem to get the row index since I want to get the rowindex even if the actual row has not been clicked.
Any help appreciated.
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Im using a tool by sysinternals that shows me whether a file has a signature and the date it was signed. However, I need the api for C#, so that i can get the same results.
Atm I use cmd sigcheck send the results it to a stream and parse the results, but if i have 1000s of files I need to process.start cmd 1000s of times.
Any help is appreciated.
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Sigcheck can check several files located in the same directory. Here is an example: Sigcheck v1.54
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Yes, I use sigcheck quite extensively, and can get all values for any file.
However my question is, I don't want to do it from dos, but use some class helper in c# that will do it for me.
So that when i pass the ProceesModule / FullName it will return me those same values that sigcheck return in a dos command.
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greetings all
i want to append the values from a sql query to a datagrid and i'm using the following code.
{
string sqlquery;
sqlquery = "select " + txt_comkey_tbl1 + " from " + Table1 + " where " + txt_comkey_tbl1 + " not in (select " + txt_comkey_tbl2 + " from " + Table2 + ")";
dbCmd = new OleDbCommand();
dbCmd.Connection = dbConn;
dbCmd.CommandText = sqlquery;
dbCmd.CommandType = CommandType.Text;
dbtable = new DataTable(sqlquery);
dgTblDiff.DataSource = dbtable;
}
the code compiles successfully but the grid isn't populated. have i missed something??
please help
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I have a third party components that gives me update in form of events upon subscribing for it. Now problem is upon subscribing for lots of such items I may end up receiving lots and lots of event updates at the same time, and I have to handle all of these ...
Kindly suggest some ways to do the same.
Thanks in advance
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Your question is not clear. Could you explain it more?
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I have a publish subscribe system, that upon subscribing to it, sends update in form of an event... when I subscribe for tooo many items ... I end up generating lots and lots of events at the client end. Now how to handle such a situation...
Any Suggestion ...
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Hi everyone,
I have a RTB, it's ScrollBars property is None. So if user types too many characters and characters rich the end of my RTB, he/she can't see some characters. How can I get the Maximum number of characters which my users can see?
Hope you understand
Thank you.
When you're alone in the Dark, Fear will protect you...
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It will depend on the size of your RichTextBox and whether you are using a fixed length font or not, what was the reason for removing the scrollbar?
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Thank you for your reply.
smyers wrote: the size of your RichTextBox
It's constant.
smyers wrote: whether you are using a fixed length font or not
Actually not.
smyers wrote: what was the reason for removing the scrollbar?
Actually I want to create a MSWord-like application, when user riches the end of a RTB, I'll create a new RTB and user can type his/her remaining characters in it.
If you (or anybody) have another idea, I'll be glad to hear it.
Thank you again
When you're alone in the Dark, Fear will protect you...
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Why are you creating a new RTB, is it for a new page?
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