Re: Extracting a block of text from a line - C# Discussion Boards

16-Dec-08 18:26

Ok, suppose I have the following line:

xxxxxxxx Here: #1111# xxxxxxxxxxx Here: #2222# xxxxxxxxxxx Here: #3333# xxxxxxxxxxx

How do I extract the value 2222 or 3333 alone

Please help

All generalizations are wrong, including this one!
(\ /)
(O.o)
(><)

Christian Graus16-Dec-08 18:53

Christian Graus

16-Dec-08 18:53

With a regex, or with the string.split, or even substring methods. It really depends on what possible values you expect to find, that is, if the 2222 is always 4 digits, always at the same position, always surrounded by #, if there's any other #, etc.

Christian Graus

Driven to the arms of OSX by Vista.

Muammar©16-Dec-08 21:40

16-Dec-08 21:40

Thanks Christian, me too, but I'm looking for another way to do it like Regex

All generalizations are wrong, including this one!
(\ /)
(O.o)
(><)

Chamadness16-Dec-08 20:46

Chamadness

16-Dec-08 20:46

Use:

using System.Text.RegularExpressions.RegEx;

RegEx finder = new RegEx("( Here: #(?<Number>\\d+)#) ", RegExOptions.ExplicitCapture);

foreach(Match match in finder.Matches("xxxxx Here: #1111# Xxxxxxxx Here: #2222# xxxxx"))
{
     string number = match.Groups["Number"].Value;
}

To code, or not: Too code!

Muammar©16-Dec-08 22:55

16-Dec-08 22:55

Hey,
Thanks, actually, I wanted to mention RegEx in my question but I wasn't sure I needed it in my case, can you tell me though how to reference the library in full cuz I can only get System.Text.RegularExpressions but not the .RegEx it doesnt branch anymore from that, besides, can you kindly link me to a good tutorial/reference to using RegEx.

Thanks mate!

All generalizations are wrong, including this one!
(\ /)
(O.o)
(><)

Christian Graus16-Dec-08 23:09

Christian Graus

16-Dec-08 23:09

If you use the RegularExpressions namespace, RegEx is a class with static methods which he is calling.

The O'Reilly book 'mastering regular expressions' is the best resource available on the topic.

Christian Graus

Driven to the arms of OSX by Vista.

Muammar©16-Dec-08 23:17

16-Dec-08 23:17

Christian Graus wrote:
O'Reilly book...

Hmmm, I should get one today, thanks Christian!

All generalizations are wrong, including this one!
(\ /)
(O.o)
(><)

Muammar©16-Dec-08 23:15

16-Dec-08 23:15

Still cant get it Blush | :O

, I tried to play around with it but I screwed it..
Listen, I'm sorry but can you get me ip address alone out of the following??

Received: from [82.114.186.143] xxxxxxxxxxxxxxxx

Thanks again mate!

All generalizations are wrong, including this one!
(\ /)
(O.o)
(><)

Enum problem in PropertyGrid

#realJSOP17-Dec-08 0:31

#realJSOP

17-Dec-08 0:31

Well, I don't know much at all about Regex, but it seems to me that you'd try to find out if there's a way to say "give me everything between the brackets". There must be a wildcard character that does this. The example provided earlier that shows how to get everything between the '#' characters would give you a stepping off point.

Be a programmer, and work it out.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Xmen Real 16-Dec-08 17:56

16-Dec-08 17:56

i have added an Enum as a property in a class then attach that class to PropertyGrid. It shows a combobox in PG but problem is that whenever i select any item from that combobox, its text keep blank. I used a TypeConverter for that class. Anybody know how to solve this ?

here is code

    class ProperyConverter : TypeConverter
    {
        public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context,
            object value, Attribute[] filter)
        {
            return TypeDescriptor.GetProperties(value, filter);
        }

        public override bool GetPropertiesSupported(ITypeDescriptorContext context)
        {
            return true;
        }
    }

[TypeConverter(typeof(ProperyConverter))]
    class ABC
    {
        object[] data;
        public ABC(object[] data)
        {
            this.data = data;
            
        }
        public override string ToString()
        {
            //return base.ToString();
            return data[0].ToString();
        }
        public MYEnum AAA                        // (Ma)
        {
            get { return (MYEnum)Convert.ToInt32(this.ToString()[0]); }
            set { setValue(0, ((int)value).ToString()); }
        }
    }

TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87֦ʻ6ϣN8ȤBcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can

Lev Danielyan16-Dec-08 18:55

16-Dec-08 18:55

Please post the code, it should work the way you described

Regards,
Lev

Xmen Real 16-Dec-08 18:59

16-Dec-08 18:59

first post updated Wink | ;)

Lev Danielyan16-Dec-08 19:10

16-Dec-08 19:10

The problem seems to be in your property getter/setter.

I've changed the code and it works great (don't know you setdata func, so I just assigned the stuff):

get { return (MYEnum)Convert.ToInt32(data[0]); }
set { data[0] = value; }

BTW, getting the value of data, via ToString() is not that good, you've got the private data anyway Smile | :)

BTW2, you do not have any checks on the array, what if I init the ABC class with empty array?

Regards,
Lev

Xmen Real 16-Dec-08 19:19

16-Dec-08 19:19

Lev Danielyan wrote:
BTW2, you do not have any checks on the array, what if I init the ABC class with empty array?

setValue() have everything

Lev Danielyan wrote:
get { return (MYEnum)Convert.ToInt32(data[0]); }

nope, you cannot Convert direct from object to int32 AFAIK because its type string...

Lev Danielyan wrote:
I've changed the code and it works great

what you mean by works great ? doest it shows the selected enum or still blank ?

Lev Danielyan16-Dec-08 19:57

16-Dec-08 19:57

Xmen wrote:
nope, you cannot Convert direct from object to int32 AFAIK because its type string...

It is not string in your code, it is object. Convert.Toint32 has an overloaded version to get object, even if it didn't it will work if you have strings or any other types that toint32 "understands".

Xmen wrote:
what you mean by works great ? doest it shows the selected enum or still blank ?

When I ran you code the current selection was blank, but it wouldn't let me choose any other option (when i was clicking on any combo item it wasn't "fixing" it as current selection), in the code I posted the initial selection was also blank but it was keeping the selection from combo items. Isn't it what you wanted?

Regards,
Lev

Xmen Real 16-Dec-08 20:02

16-Dec-08 20:02

Lev Danielyan wrote:
but it was keeping the selection from combo items.

i dunno what are excatly you saying but my problem is just that its not showing selected item, eg when you select an item from combobox, it get appear infront of dropdown arrow. But this time in PG its not happening, when i select item, it does some calculations but doest appear selected(infront of dropdownbutton)

Lev Danielyan16-Dec-08 20:14

16-Dec-08 20:14

Hmm

, it appears on my side (screen[^])

Maybe there are problems in the code you haven't posted?

Regards,
Lev

Xmen Real 16-Dec-08 20:18

16-Dec-08 20:18

did you change the Type Converter ?

here is the screen of mine, blank even after selecting
http://img95.imageshack.us/my.php?image=62694072re0.png[^]

Xmen Real 16-Dec-08 20:37

16-Dec-08 20:37

i found the problem + solution

Convert.ToInt32(this.ToString()[0])

this.ToString()[0]string is returning a char and then when Convert class convert that char to ascii value to the value it has and that Enum do not has that value thats why its blank.

while if i use this.ToString().Substring(0,1) it works

Lev Danielyan16-Dec-08 21:26

16-Dec-08 21:26

I still don't get why are you getting the internal data via ToString.
This is not the right thing to do.
Quoting MSDN "This method returns a human-readable string that is culture-sensitive", not more, you better redesign your class to get rid of this Smile | :)

Regards,
Lev

Xmen Real 17-Dec-08 1:49

17-Dec-08 1:49

Lev Danielyan wrote:
I still don't get why are you getting the internal data via ToString.

hehe because you didnt read code carefully, the code needs to rip one char from string then convert it to int then Enum. eg here is my string "1234"

i dont need 1234 as number, i'll need 1, 2, 3 and 4, so without converting it to string it wont happen. And i use this.ToString() because its same as data[..............].ToString(), i didnt use it because the line will be larger because i use some calculation to get the index.eg.

Override ToString()
{
return data[long .............. calculation].ToString();
}

Now which is better in appearing

Convert.ToIn32(data[long .............. calculation].ToString().Substring(0,1)); // long calculation again, breaking OOPS rule
or
Convert.ToIn32(this.ToString().Substring(0,1));

both does same, just last one calls one more method that is this.ToString() and i dont think its a bad idea

hope you got me Wink | ;)

Lev Danielyan17-Dec-08 2:13

17-Dec-08 2:13

Ok, I got you now, but you can as well use a property, or some other method, which doesn't mean to be overriden. But hey, it's you code Wink | ;)

Regards,
Lev

Xmen Real 17-Dec-08 2:16