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You are right, this would work better:
string test = "this string has multiple spaces .";
StringBuilder sb = new StringBuilder(test);
int l1 = sb.Length;
int l2 = l1 +1;
while (l1 != l2)
{
l1 = sb.Length;
sb.Replace(" ", " ");
l2 = sb.Length;
}
string result = sb.ToString();
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Sorry, but taking the trouble of using StringBuilder only makes sense if you succeed
in avoiding unnecessary copy operations, hence StringBuilder.Replace is not my choice at all.
Either you use String.Replace in a loop, or a one-pass populating StringBuilder.
BTW your initial values for i1 and i2 are not needed if you test after the loop (do-while).
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it is not working!!! ! extra spaces can be of any number!! and this will only replace 2 spaces with 1 what if we have 99 spaces? !
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Please don't end every sentence with an exclamation mark. Those are used for interjections and exclamations, not for ordinary sentences. An ordinary sentence is ended by a period.
You can replace multiple spaces using a regular expresson:
str = Regex.Replace(str, " {2,}", " ");
---
single minded; short sighted; long gone;
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actually they were used for exclamations and that is because working and learning new things of c# do make me happy.
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If you're happy and you know it keep it to your own darn self.
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I happen to have one here, one I wrote in C many years ago and then ported to C# a few years back, thanks for giving me a reason to revisit it. (Now I'll revisit my Split that honors quotes and escapes as well.)
Usage:
subject = the string to compress
trash = list of characters to compress (usually " \b" -- SPACE and TAB)
replacements = what to replace them with (usually " " -- SPACE)
quotes = if you don't want compress within quotes, specify "\"" or "'"
escapes = not often used, but if for instance trash contains "n" and subject contains "\n"
and you don't want it replaced, specify "\\" for escapes and the "\n" will be
preserved
(quotes and escapes may be empty or null)
advanced: two characters may be specified for replacements (and I've forgotten why I allow it)
given trash="z" and replacements="xy"
then subject="zzz" becomes "yyx" (rather than "x")
example:
if ( args.Length > 0 )
{
System.Console.Write
(
"<" +
PIEBALD.Lib.LibStr.Compress ( args [ 0 ] , " \b" , " " , "'" , "\\" )
+ ">"
) ;
}
public static string
Compress
(
string subject ,
string trash ,
string replacements ,
string quotes ,
string escapes
)
{
System.Text.StringBuilder result = new System.Text.StringBuilder ( subject.Length ) ;
char prevch = '\0' ;
int index = 0 ;
int quo = -1 ;
int quoon = -1 ;
int escon = -1 ;
if ( quotes == null )
{
quotes = "" ;
}
if ( escapes == null )
{
escapes = "" ;
}
while ( index < subject.Length )
{
if ( ( escon = escapes.IndexOf ( prevch ) ) != -1 )
{
quoon = -1 ;
}
else
{
quoon = quotes.IndexOf ( subject [ index ] ) ;
}
if ( quoon != -1 )
{
if ( quo == -1 )
{
quo = quoon ;
}
else
{
if ( quo == quoon )
{
quo = -1 ;
}
}
}
prevch = subject [ index ] ;
if ( ( quo == -1 ) && ( trash.IndexOf ( subject [ index ] ) != -1 ) )
{
if ( ( index == subject.Length-1 ) || ( trash.IndexOf ( subject [ index+1 ] ) == -1 ) )
{
result.Append ( replacements [ 0 ] ) ;
}
else
{
if ( replacements.Length > 1 )
{
result.Append ( replacements [ 1 ] ) ;
}
}
index++ ;
}
else
{
result.Append ( subject [ index++ ] ) ;
}
}
return ( result.ToString() ) ;
}
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! that is some re-usability! ! the suggestion/guidence by Luc is proving to be great and actually bit simpler tooo  Thanks PIEBALDconsult
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I don't like to write single-use library functions, the more flexibility the better in my opinion, but the RegularExpression solution may be our best bet.
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str = str.Replace(" ", " ");
the first argument in str.Replace is a 2 white space characters ( press spacebar twice )
the second argument in str is a 1 white space character ( press spacebar once )
Sorry, but I had to explain these arguments ion details, they are not correctly shown after the message is posted.
Hope this helps...
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Dear all,
I have a treeview which I populate from a postgres database. This all works fine, and I'm using the following code :
DataRow newRow = dt.NewRow();<br />
dt.Columns.Add("Resources", typeof(System.String));<br />
<br />
if (dt.Rows.Count > 0)<br />
{<br />
treeView1.BeginUpdate();<br />
foreach (DataRow r in dt.Rows)<br />
{<br />
treeView1.Nodes.Add(new TreeNode(r["res_lastname"].ToString()));<br />
}<br />
treeView1.EndUpdate();<br />
}
Well, I'm not grabbing the data from the database directly but rather through a dataset.
I can add as many rows as I like, just by putting an extra line in , like this :
treeView1.Nodes.Add(new TreeNode(r["res_lastname"].ToString()));<br />
treeView1.Nodes.Add(new TreeNode(r["res_firstname"].ToString()));
Lastname and Firstname show up in the treeview below eachother :
-- Lastname
-- Firstname
Is there a way to show them right next to eachother , like this :
-- Lastname, Firstname
kind regards,
Rick
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Rick van Woudenberg wrote: treeView1.Nodes.Add(new TreeNode(r["res_lastname"].ToString()));
treeView1.Nodes.Add(new TreeNode(r["res_firstname"].ToString()));
Have you tried this?
treeView1.Nodes.Add(new TreeNode(r["res_lastname"].ToString() + "," + r["res_firstname"].ToString()));
Regards,
Arun Kumar.A
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I just did and it works perfect. I need a vacation, how could I miss that ? :-S
Thank you so much for your help and quick input.
Cheers !
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No, you should query the fullname like
res_fullname=res_lastname+' '+res_firstname
and then use
treeView1.Nodes.Add(new TreeNode(r["res_fullname"].ToString()
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Thank you for your reply, and your solutions seems to work as well.
Is there a significant difference in the two approaches, or is it just a matter of taste ?
Cheers ?
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That was a joke, notice the smiley? (I guess I should have put it inside the message.)
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Hello experts,
I'm working on a system which would be able to dinamically load all kinds of multiplayer games.
In order for the system to know how to handle any game, I set up some ground rules using an abstract class named GameEngine.
Among other stuff, it contains an abstract ProcessMessage() method.
At first I thought of loading DLLs from a special folder, and analyzing every class which inherits GameEngine.
But then came another thought into my mind...
What if someone, instead of implementing a game, inherits GameEngine and puts down malicious code into ProcessMessage()?
My first solution is not to read DLLs from a directory, but to read only a DLL that I will code... Whenever I want to add another game, I would update the DLL...
However, this prevents other programmers from adding games to my program...
What can I do?
Thanks in advance,
Shy.
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You should allow plugins, regardless of the security risks.
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You should sign your plugins ( DLLs ) using Signcode.exe and also use a Dotfuscator like tool to prevenet (as much as you can) your dlls from being disassembled to their original source code. Don't forget SecurityPermissionAttributes which also add another level of protection to your distributed plug-ins(DLLs). Checkout:
Web site: http://msdn2.microsoft.com/en-us/library/ab4eace3(vs.71).aspx
MSDN Library: Assembly Security Considerations
Hope this helps...
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Hello!
I made a small C# application where you need to enter float numbers.
In the Dutch language/math they write floating point numbers with a ',' so for instance 1,5
In English they write a dot like 1.5
The strange thing is that in my application only floating point number with a comma are entered correctly.
Could someone tell me why this is? When I would enter 1.234 my program thinks it means 12.34, only when I type 1,234 this float is entering my program correctly...
Could anybody tell me what is happening here, I would prefer to use the English version only! But maybe .NET sees that I have a Dutch PC?
Ranger.
Novice
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I have been looking around and found an interface called IFormatProvider but that this stuff is really complicated.
It has to do with local standards, how countries have different ways of displaying things.
Just like I expected.
Can you switch off this local way of interpreting information?
Ranger.
Novice
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Ranger49 wrote: Can you switch off this local way of interpreting information?
Yes, if you pass CultureInfo.InvariantCulture as IFormatProvider.
-- modified at 8:08 Sunday 6th May, 2007
"Throughout human history, we have been dependent on machines to survive. Fate, it seems, is not without a sense of irony. " - Morpheus
"Real men use mspaint for writing code and notepad for designing graphics." - Anna-Jayne Metcalfe
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dnh wrote: Yes, if you pass CultureInfo.InvariantCulture as IFormatProvider.
Thanks! This is exactly what I needed to know!
Ranger.
Novice
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Pass NumberFormatInfo as the IFormatProvider.
Hope this helps...
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Hi all,
i want to know how can I add data in a form from another form and display it in a datagrid after adding it to the first form
pleeease help
thanx
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