String Parsing

[Bob Davis]

In C# one can construct a string using the format method.

for example

string newstring = string.Format("CC%d-%s.%d-%s-%
d",123,"aaaa",456,"bbb",789);

The resulting newstring will be "CC123-aaa.456-bbb-789"

The question I have is, given the newstring and the
format how do I extract the parse out the different
elements.

Thanks,
Bob

 

[Mattias Sjögren]

Bob,

string newstring = string.Format("CC%d-%s.%d-%s-%
d",123,"aaaa",456,"bbb",789);

That looks more like a C printf style fromat string than a .NET one.

The resulting newstring will be "CC123-aaa.456-bbb-789"

The question I have is, given the newstring and the
format how do I extract the parse out the different
elements.

That would be non-trivial to do (if not impossible). If it's doable
depends on what kind of input you support. You'd have to do the
parsing yourself one way or another.



Mattias

 

[Shiv Kumar]

In this particular case you dhuld br able to use the String.Split method to
back back an array like

CC123
aaa
456
bbb
789

Of course I don't see the big picture so I can't give you a generic solution

 

[Bob Davis]

Mattias,

You are correct it is a printf style format, string class
in .Net provides a static member called "Format" that
enables the developers to format the way I mentioned
below.

I have come to the same conclusion, but before I go and
code I wanted to double check.

Thanks

 

[Bob Davis]

Shiv,

Split works if there is delimiter between the various
components of the string.

In this case there is no delimiter between CC and 123 and
so split fails.

I am looking for scanf type functionality, looks like I
will have the string myself.

Thanks and appreciate your help.
Bob

 

[phoenix]

You could try using regex. If you have your input format you 'just' need to
convert it to accepted regex format.

string newstring = "CC123-aaa.456-bbb-789";
GroupCollection gc = Regex.Match(newstring,
@"CC(\d+)-(\w+).(\d+)-(\w+)-(\d+)").Groups;

for (int i = 1; i < gc.Count; i++)
Console.WriteLine("Group {0} : {1}", i, gc.ToString());

Yves

 

[Jon Skeet [C# MVP]]

You are correct it is a printf style format, string class
in .Net provides a static member called "Format" that
enables the developers to format the way I mentioned
below.

No it doesn't. It enables developers for format with

"CC{0}-{1}.{2}-{3}-{4}", 123, "aaaa", 456, "bbb", 789"

which I believe was Mattias' point.

As for the parsing - a regular expression may well do it for you.

 

[Bob Davis]

Thanks everyone for your input.

Bob

-----Original Message-----
You could try using regex. If you have your input format you 'just' need to
convert it to accepted regex format.

string newstring = "CC123-aaa.456-bbb-789";
GroupCollection gc = Regex.Match(newstring,
@"CC(\d+)-(\w+).(\d+)-(\w+)-(\d+)").Groups;

for (int i = 1; i < gc.Count; i++)
Console.WriteLine("Group {0} : {1}", i, gc .ToString());

Yves

"Bob Davis" <[email protected]> schreef in bericht

In C# one can construct a string using the format method.

for example

string newstring = string.Format("CC%d-%s.%d-%s-%
d",123,"aaaa",456,"bbb",789);

The resulting newstring will be "CC123-aaa.456-bbb-789"

The question I have is, given the newstring and the
format how do I extract the parse out the different
elements.

Thanks,
Bob

.

 

[Shiv Kumar]

Sorry, I misunderstood. I thought the "-" were the delimiters