Hello,
I have noticed in a few bits of code that people sometimes do things
like...
SomeFunction(@"a text string");
What is the purpose of the @ sign? I have seen it most when passing
connection strings (admittedly in example code, as connection strings
would be better stored elsewhere in a real app), but I don't think it's
related to that.
Anyone care to enlighten me? TIA
--
Alan Silver
(anything added below this line is nothing to do with me) 10 1972
The @ can shorten typing, as it states "This string is a literal". Example of
two equivalent strings:
string URL = @"http://msnd.microsoft.com/newsgroups";
string URL = "http:////msdn.microsoft.com//newsgroups";
In the second string, every whack has to be escaped.
---
Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA
***************************
Think Outside the Box!
***************************
"Alan Silver" wrote: Hello,
I have noticed in a few bits of code that people sometimes do things like...
SomeFunction(@"a text string");
What is the purpose of the @ sign? I have seen it most when passing connection strings (admittedly in example code, as connection strings would be better stored elsewhere in a real app), but I don't think it's related to that.
Anyone care to enlighten me? TIA
-- Alan Silver (anything added below this line is nothing to do with me)
>The @ can shorten typing, as it states "This string is a literal". Example of two equivalent strings:
string URL = @"http://msnd.microsoft.com/newsgroups"; string URL = "http:////msdn.microsoft.com//newsgroups";
In the second string, every whack has to be escaped.
Ooh, ain't that clever!! I'm not sure why you need to double the / in
the second example though, is it used for something special? I thought
the backslash was, say for embedding a newline character.
How about embedding quotes, would this help?
Thanks for the reply.
*************************** Think Outside the Box!
When I grow big enough to see over the top, I'll try thinking!!
***************************
"Alan Silver" wrote:
Hello,
I have noticed in a few bits of code that people sometimes do things like...
SomeFunction(@"a text string");
What is the purpose of the @ sign? I have seen it most when passing connection strings (admittedly in example code, as connection strings would be better stored elsewhere in a real app), but I don't think it's related to that.
Anyone care to enlighten me? TIA
-- Alan Silver (anything added below this line is nothing to do with me)
--
Alan Silver
(anything added below this line is nothing to do with me)
Yes, you are correct. I am sure Gregory meant that. Those should have been
backspaces such as a unc path.
You were asking about escaping string.
string s = "He said, \"No!\"";
string s = @"He said, ""No!""";
Notice the double double quotes.
bill
"Alan Silver" <al*********@nospam.thanx> wrote in message
news:uK**************@nospamthankyou.spam... The @ can shorten typing, as it states "This string is a literal".
Example oftwo equivalent strings:
string URL = @"http://msnd.microsoft.com/newsgroups"; string URL = "http:////msdn.microsoft.com//newsgroups";
In the second string, every whack has to be escaped.
Ooh, ain't that clever!! I'm not sure why you need to double the / in the second example though, is it used for something special? I thought the backslash was, say for embedding a newline character.
How about embedding quotes, would this help?
Thanks for the reply.
*************************** Think Outside the Box!
When I grow big enough to see over the top, I'll try thinking!!
***************************
"Alan Silver" wrote:
Hello,
I have noticed in a few bits of code that people sometimes do things like...
SomeFunction(@"a text string");
What is the purpose of the @ sign? I have seen it most when passing connection strings (admittedly in example code, as connection strings would be better stored elsewhere in a real app), but I don't think it's related to that.
Anyone care to enlighten me? TIA
-- Alan Silver (anything added below this line is nothing to do with me)
-- Alan Silver (anything added below this line is nothing to do with me)
Hello Alan,
@ means to take the string literally...
Take for example a file path:
string file = "c:\temp\foo.xml";
This will not be valid, since \t is actually a tab character. So, you have
a choice of either doing this:
string file = "c:\\temp\\foo.xml";
or
string file = @"c:\temp\foo.xml";
--
Matt Berther http://www.mattberther.com Hello,
I have noticed in a few bits of code that people sometimes do things like...
SomeFunction(@"a text string");
What is the purpose of the @ sign? I have seen it most when passing connection strings (admittedly in example code, as connection strings would be better stored elsewhere in a real app), but I don't think it's related to that.
Anyone care to enlighten me? TIA
>Yes, you are correct. I am sure Gregory meant that. Those should have been backspaces such as a unc path.
You were asking about escaping string.
string s = "He said, \"No!\""; string s = @"He said, ""No!""";
Notice the double double quotes.
But what do you gain in this case? You have substituted one escape
character for another. My first impression was that you could type a
string without escape characters at all. Your example doesn't give any
benefit for having the @.
Apart from string containing backslashes, is there any benefit of the @
notation?
Thanks for the reply
bill
"Alan Silver" <al*********@nospam.thanx> wrote in message news:uK**************@nospamthankyou.spam... >The @ can shorten typing, as it states "This string is a literal".Example of >two equivalent strings: > >string URL = @"http://msnd.microsoft.com/newsgroups"; >string URL = "http:////msdn.microsoft.com//newsgroups"; > >In the second string, every whack has to be escaped.
Ooh, ain't that clever!! I'm not sure why you need to double the / in the second example though, is it used for something special? I thought the backslash was, say for embedding a newline character.
How about embedding quotes, would this help?
Thanks for the reply.
>*************************** >Think Outside the Box!
When I grow big enough to see over the top, I'll try thinking!!
>*************************** > >"Alan Silver" wrote: > >> Hello, >> >> I have noticed in a few bits of code that people sometimes do things >> like... >> >> SomeFunction(@"a text string"); >> >> What is the purpose of the @ sign? I have seen it most when passing >> connection strings (admittedly in example code, as connection strings >> would be better stored elsewhere in a real app), but I don't think it's >> related to that. >> >> Anyone care to enlighten me? TIA >> >> -- >> Alan Silver >> (anything added below this line is nothing to do with me) >>
-- Alan Silver (anything added below this line is nothing to do with me)
--
Alan Silver
(anything added below this line is nothing to do with me)
> string file = "c:\temp\foo.xml"; This will not be valid, since \t is actually a tab character. So, you have a choice of either doing this:
Is that in all of the .net languages or just some? I believe I am passing
all sorts of file paths with backslashes as strings without the @ in vb.net.
Maybe I just have been lucky and haven't stumbled on a 'slash caracter' pair
that's actually an escape of something?
-Darrel
Thanks Matt, that's a good example. Hello Alan,
@ means to take the string literally...
Take for example a file path:
string file = "c:\temp\foo.xml";
This will not be valid, since \t is actually a tab character. So, you have a choice of either doing this:
string file = "c:\\temp\\foo.xml";
or
string file = @"c:\temp\foo.xml";
-- Matt Berther http://www.mattberther.com
Hello, I have noticed in a few bits of code that people sometimes do things like... SomeFunction(@"a text string"); What is the purpose of the @ sign? I have seen it most when passing connection strings (admittedly in example code, as connection strings would be better stored elsewhere in a real app), but I don't think it's related to that. Anyone care to enlighten me? TIA
--
Alan Silver
(anything added below this line is nothing to do with me)
its a c# feature (i forget what language c# stole it from). vb does not use
\ as a quote char. beside making it easier to build filename straings, it
also allows the newline character so you can do:
string html =
@"<html>
<body>
</body>
</html>
";
-- bruce (sqlwork.com)
"darrel" <no*****@hotmail.com> wrote in message
news:%2****************@TK2MSFTNGP14.phx.gbl...
| > string file = "c:\temp\foo.xml";
| >
| > This will not be valid, since \t is actually a tab character. So, you
have
| > a choice of either doing this:
|
| Is that in all of the .net languages or just some? I believe I am passing
| all sorts of file paths with backslashes as strings without the @ in
vb.net.
| Maybe I just have been lucky and haven't stumbled on a 'slash caracter'
pair
| that's actually an escape of something?
|
| -Darrel
|
|
Oh, you can also do this.
string script = @"
<script language=""javascript"">
function myFunction()
{
alert( 'hello world' );
}
";
or
string script = String.Format( @"
<script language=""javascript"">
function myFunction()
{
alert( document.all[""{0}""].value );
}
", myControl.ID );
It makes it more readable, it is purely a personal preference, so if you
don't want to use it, then don't. I use both with a '@' and without
depending on my usage and what I am going for.
string uncPath = "\\\\server1\\share\directory\\file.txt"
string uncPath = @\\server1\share\directory\file.txt
bill
"Alan Silver" <al*********@nospam.thanx> wrote in message
news:Xa**************@nospamthankyou.spam... Yes, you are correct. I am sure Gregory meant that. Those should have
beenbackspaces such as a unc path.
You were asking about escaping string.
string s = "He said, \"No!\""; string s = @"He said, ""No!""";
Notice the double double quotes.
But what do you gain in this case? You have substituted one escape character for another. My first impression was that you could type a string without escape characters at all. Your example doesn't give any benefit for having the @.
Apart from string containing backslashes, is there any benefit of the @ notation?
Thanks for the reply
bill
"Alan Silver" <al*********@nospam.thanx> wrote in message news:uK**************@nospamthankyou.spam... >The @ can shorten typing, as it states "This string is a literal". Example of >two equivalent strings: > >string URL = @"http://msnd.microsoft.com/newsgroups"; >string URL = "http:////msdn.microsoft.com//newsgroups"; > >In the second string, every whack has to be escaped.
Ooh, ain't that clever!! I'm not sure why you need to double the / in the second example though, is it used for something special? I thought the backslash was, say for embedding a newline character.
How about embedding quotes, would this help?
Thanks for the reply.
>*************************** >Think Outside the Box!
When I grow big enough to see over the top, I'll try thinking!!
>*************************** > >"Alan Silver" wrote: > >> Hello, >> >> I have noticed in a few bits of code that people sometimes do things >> like... >> >> SomeFunction(@"a text string"); >> >> What is the purpose of the @ sign? I have seen it most when passing >> connection strings (admittedly in example code, as connection
strings >> would be better stored elsewhere in a real app), but I don't think
it's >> related to that. >> >> Anyone care to enlighten me? TIA >> >> -- >> Alan Silver >> (anything added below this line is nothing to do with me) >>
-- Alan Silver (anything added below this line is nothing to do with me)
-- Alan Silver (anything added below this line is nothing to do with me)
>Oh, you can also do this.
Now that's *really* clever!! Thanks for pointing it out. string script = @" <script language=""javascript""> function myFunction() { alert( 'hello world' ); } ";
or string script = String.Format( @" <script language=""javascript""> function myFunction() { alert( document.all[""{0}""].value ); } ", myControl.ID );
It makes it more readable, it is purely a personal preference, so if you don't want to use it, then don't. I use both with a '@' and without depending on my usage and what I am going for.
string uncPath = "\\\\server1\\share\directory\\file.txt" string uncPath = @\\server1\share\directory\file.txt
bill
"Alan Silver" <al*********@nospam.thanx> wrote in message news:Xa**************@nospamthankyou.spam... >Yes, you are correct. I am sure Gregory meant that. Those should havebeen >backspaces such as a unc path. > >You were asking about escaping string. > >string s = "He said, \"No!\""; >string s = @"He said, ""No!"""; > >Notice the double double quotes.
But what do you gain in this case? You have substituted one escape character for another. My first impression was that you could type a string without escape characters at all. Your example doesn't give any benefit for having the @.
Apart from string containing backslashes, is there any benefit of the @ notation?
Thanks for the reply
>bill > >"Alan Silver" <al*********@nospam.thanx> wrote in message >news:uK**************@nospamthankyou.spam... >> >The @ can shorten typing, as it states "This string is a literal". >Example of >> >two equivalent strings: >> > >> >string URL = @"http://msnd.microsoft.com/newsgroups"; >> >string URL = "http:////msdn.microsoft.com//newsgroups"; >> > >> >In the second string, every whack has to be escaped. >> >> Ooh, ain't that clever!! I'm not sure why you need to double the / in >> the second example though, is it used for something special? I thought >> the backslash was, say for embedding a newline character. >> >> How about embedding quotes, would this help? >> >> Thanks for the reply. >> >> >*************************** >> >Think Outside the Box! >> >> When I grow big enough to see over the top, I'll try thinking!! >> >> >*************************** >> > >> >"Alan Silver" wrote: >> > >> >> Hello, >> >> >> >> I have noticed in a few bits of code that people sometimes do things >> >> like... >> >> >> >> SomeFunction(@"a text string"); >> >> >> >> What is the purpose of the @ sign? I have seen it most when passing >> >> connection strings (admittedly in example code, as connectionstrings >> >> would be better stored elsewhere in a real app), but I don't thinkit's >> >> related to that. >> >> >> >> Anyone care to enlighten me? TIA >> >> >> >> -- >> >> Alan Silver >> >> (anything added below this line is nothing to do with me) >> >> >> >> -- >> Alan Silver >> (anything added below this line is nothing to do with me) > >
-- Alan Silver (anything added below this line is nothing to do with me)
--
Alan Silver
(anything added below this line is nothing to do with me) This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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