Search for Quote inside a string

[temp]

Hi,

completeString = "<p><a href="http://www.google.com" > ..... "

Now I want to extract the link pointed out by href so I try to find the
position of first the href tag and then try to see where the quotes begin.

pos_tag = completeString. IndexOf("href", 0, completeString. Length);

pos_text_tag_st art = completeString. IndexOf("\"", pos_tag,
completeString. Length);

but this last line gives me an error - how can I find the position of a
quote - " in a string?

I have also tried :

pos_text_tag_st art = completeString. IndexOf(""", pos_tag,
completeString. Length);



Any help is appreciated.

[Rob Windsor [MVP]]

Re: Search for Quote inside a string

I think all of these will work:

"""" (four double quotes)
'"' (single quote, double quote, single quote)
Convert.ToChar( 32)
(char)32

--
Rob Windsor [MVP-VB]
G6 Consulting
Toronto, Canada

http://msmvps.com/windsor/

"temp" <temporary_immo rtality@yahoo.c om> wrote in message
news:upLReQaEGH A.3984@TK2MSFTN GP14.phx.gbl...[color=blue]
> Hi,
>
> completeString = "<p><a href="http://www.google.com" > ..... "
>
> Now I want to extract the link pointed out by href so I try to find the
> position of first the href tag and then try to see where the quotes begin.
>
> pos_tag = completeString. IndexOf("href", 0, completeString. Length);
>
> pos_text_tag_st art = completeString. IndexOf("\"", pos_tag,
> completeString. Length);
>
> but this last line gives me an error - how can I find the position of a
> quote - " in a string?
>
> I have also tried :
>
> pos_text_tag_st art = completeString. IndexOf(""", pos_tag,
> completeString. Length);
>
>
>
> Any help is appreciated.
>
>[/color]

[Jon Skeet [C# MVP]]

Re: Search for Quote inside a string

Rob Windsor [MVP] <rob.windsor.no .spam@gmail.com > wrote:[color=blue]
> I think all of these will work:
>
> """" (four double quotes)
> '"' (single quote, double quote, single quote)[/color]

These two won't. You need:
@""""
"\""
or '\"'.

--
Jon Skeet - <skeet@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[temp]

Re: Search for Quote inside a string


"Jon Skeet [C# MVP]" <skeet@pobox.co m> wrote in message
news:MPG.1e26ad b739c5f1fc98cc7 0@msnews.micros oft.com...[color=blue]
> Rob Windsor [MVP] <rob.windsor.no .spam@gmail.com > wrote:[color=green]
>> I think all of these will work:
>>
>> """" (four double quotes)
>> '"' (single quote, double quote, single quote)[/color]
>
> These two won't. You need:
> @""""
> "\""[/color]

Doing "\"" doesnt work - see output from immediate window while debugging:


ompleteString.I ndexOf("\"", pos_tag, completeString. Length)

'completeString .IndexOf("\"", pos_tag, completeString. Length)' threw an
exception of type 'System.Argumen tOutOfRangeExce ption'

base {System.Argumen tException}: {"Count must be positive and count must
refer to a location within the string/array/collection.\r\n Parameter name:
count"}

ActualValue: null

Message: "Count must be positive and count must refer to a location within
the string/array/collection.\r\n Parameter name: count"



[color=blue]
> or '\"'.
>[/color]

[Mike Schilling]

Re: Search for Quote inside a string


"temp" <temporary_immo rtality@yahoo.c om> wrote in message
news:e8YaZpbEGH A.3004@TK2MSFTN GP15.phx.gbl...[color=blue]
>
> "Jon Skeet [C# MVP]" <skeet@pobox.co m> wrote in message
> news:MPG.1e26ad b739c5f1fc98cc7 0@msnews.micros oft.com...[color=green]
>> Rob Windsor [MVP] <rob.windsor.no .spam@gmail.com > wrote:[color=darkred]
>>> I think all of these will work:
>>>
>>> """" (four double quotes)
>>> '"' (single quote, double quote, single quote)[/color]
>>
>> These two won't. You need:
>> @""""
>> "\""[/color]
>
> Doing "\"" doesnt work - see output from immediate window while debugging:
>
>
> ompleteString.I ndexOf("\"", pos_tag, completeString. Length)
>
> 'completeString .IndexOf("\"", pos_tag, completeString. Length)' threw an
> exception of type 'System.Argumen tOutOfRangeExce ption'
>
> base {System.Argumen tException}: {"Count must be positive and count must
> refer to a location within the string/array/collection.\r\n Parameter name:
> count"}
>
> ActualValue: null
>
> Message: "Count must be positive and count must refer to a location within
> the string/array/collection.\r\n Parameter name: count"[/color]

The problem is with the count, not with the character you're looking for.
You're trying to look from pos_tag to pos_tag + Length -1, which is beyond
the end of the string. Since you want to search to the end of the entire,
just use the two-argument form:

:pos_tag = 'completeString .IndexOf("\"", pos_tag);

[color=blue]
>
>
>
>[color=green]
>> or '\"'.
>>[/color]
>[/color]

[ray_f]

RE: Search for Quote inside a string

I believe regular expression would make things easier in your case.

Try something like this:
(?<Protocol>htt p):\/\/(?<Domain>[\w.]+\/?)\S*(?x)

And then you can parse the input string with
System.Text.Reg ularExpressions .Regex, which will probably save you tens of
lines of code.

A great tools called Expresso from Ultrapico can help you build a regular
expression visually. Worth trying in case you are not familiar with regular
expression.

Good luck!


"temp" wrote:
[color=blue]
> Hi,
>
> completeString = "<p><a href="http://www.google.com" > ..... "
>
> Now I want to extract the link pointed out by href so I try to find the
> position of first the href tag and then try to see where the quotes begin.
>
> pos_tag = completeString. IndexOf("href", 0, completeString. Length);
>
> pos_text_tag_st art = completeString. IndexOf("\"", pos_tag,
> completeString. Length);
>
> but this last line gives me an error - how can I find the position of a
> quote - " in a string?
>
> I have also tried :
>
> pos_text_tag_st art = completeString. IndexOf(""", pos_tag,
> completeString. Length);
>
>
>
> Any help is appreciated.
>
>
>[/color]

[Ignacio Machin \( .NET/ C# MVP \)]

Re: Search for Quote inside a string

Hi,
[color=blue]
>
> ompleteString.I ndexOf("\"", pos_tag, completeString. Length)
>
> 'completeString .IndexOf("\"", pos_tag, completeString. Length)' threw an
> exception of type 'System.Argumen tOutOfRangeExce ption'
>
> base {System.Argumen tException}: {"Count must be positive and count must
> refer to a location within the string/array/collection.\r\n Parameter name:
> count"}[/color]

Well, the error is pretty self explanatory, pos_tag is probably > 0
therefore pos_tag + string.Length > string.Length , therefore you get the
error, it's CLEARLY stated in MSDN !

Just do IndexOf( "\"" , pos_tag );

Now , I STRONGLY suggest you to take the advice of Ray and use a regular
expression instead, you can find the url enclosed in " or in ' or even
nothing.
To further complicate the things, you could have things like : <a href="#"
onclick="window .open('url');re turn false">

Have fun! :)


--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

[temp]

Re: Search for Quote inside a string


"Ignacio Machin ( .NET/ C# MVP )" <ignacio.mach in AT dot.state.fl.us > wrote
in message news:u1ybGAgEGH A.336@TK2MSFTNG P14.phx.gbl...[color=blue]
> Hi,[/color]

Hi

[color=blue]
> Now , I STRONGLY suggest you to take the advice of Ray and use a regular
> expression instead, you can find the url enclosed in " or in ' or even
> nothing.
> To further complicate the things, you could have things like : <a
> href="#" onclick="window .open('url');re turn false">[/color]


Did I miss something? I cannot see the post of Ray where he has suggested
regular expressions?


[color=blue]
> Have fun! :)
>
>
> --
> Ignacio Machin,
> ignacio.machin AT dot.state.fl.us
> Florida Department Of Transportation
>[/color]

[temp]

IGORE ABOVE POST

Found Ray's suggestion (strange that I still dont see it in my news client,
but I see his post on a different site).



"temp" <temporary_immo rtality@yahoo.c om> wrote in message
news:%23IulHCkE GHA.336@TK2MSFT NGP14.phx.gbl.. .[color=blue]
>
> "Ignacio Machin ( .NET/ C# MVP )" <ignacio.mach in AT dot.state.fl.us >
> wrote in message news:u1ybGAgEGH A.336@TK2MSFTNG P14.phx.gbl...[color=green]
>> Hi,[/color]
>
> Hi
>
>[color=green]
>> Now , I STRONGLY suggest you to take the advice of Ray and use a regular
>> expression instead, you can find the url enclosed in " or in ' or even
>> nothing.
>> To further complicate the things, you could have things like : <a
>> href="#" onclick="window .open('url');re turn false">[/color]
>
>
> Did I miss something? I cannot see the post of Ray where he has suggested
> regular expressions?
>
>
>[color=green]
>> Have fun! :)
>>
>>
>> --
>> Ignacio Machin,
>> ignacio.machin AT dot.state.fl.us
>> Florida Department Of Transportation
>>[/color]
>
>[/color]