find occurrence of string and stored it in array

Question

I have a svg file in string format which look like this http://jsfiddle.net/mumg81qq/5/ This file contains color code in either hex/rgb format.

i want to extract these two different types of colors format in two arrays.

hex colors could be in format of

fill:#303744 
---OR---
fill="#020202"

and rgb colors could be in format of

fill:rgb(48,49,55)
---OR---
fill="rgb(205,149,36)"

resultant array should look like this

hexColor = ["#303744","#020202"]

rgbColor = ["rgb(48,49,55)","rgb(205,149,36)"]

I could only managed to write code which search one type of hex string .

string searchHex1 = "fill=\"#", searchHex2 = "fill:#";
string searchRGB1 = "fill=\"rgb(", searchRGB2 = "fill:rgb(";

List<string> hexColor = new List<string>();
List<string> rgbColor = new List<string>();

string sHexColor = "";
int index = 0;
do
{
    index = svgFile.IndexOf(searchHex1, index);
    if (index != -1)
    {
        sHexColor = svgFile.Substring(index, 7);
        if (!hexColor.Contains(sHexColor))
        {
            hexColor.Add(sHexColor);
        }
        index++;
    }
} while (index != -1);

in most efficient way i want to search 4 different types of hex & rgb colors and store it in two different arrays.

you want to use regex for this. You can get a matchcollection and then iterate it to add it to your array. — ESD
– ESD, Commented Apr 23, 2015 at 16:21

ESD · Accepted Answer · 2015-04-23 16:33:14Z

1

something like this should work for you where input is your file as a string

        string hexapattern = @"#[0-9a-fA-F]{6}";
        string rgbpattern = @"rgb\([0-9]+\,[0-9]+\,[0-9]+\)";

        Regex rgxHexa = new Regex(hexapattern);
        MatchCollection matches = rgxHexa.Matches(input);
        foreach (Match match in matches)
        { 
            // add to hexa array
        }


        Regex rgxRGB = new Regex(hexapattern);
        matches = rgxRGB.Matches(input);
        foreach (Match match in matches)
        {
            // add to rgb array
        }

and don't forget using System.Text.RegularExpressions;

answered Apr 23, 2015 at 16:33

ESD

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2 Comments

Shaggy Over a year ago

Will the above rgbpattern work if if i have spaces in rgb(153 , 54 , 98 ) ?

ESD Over a year ago

this one will match both with and without withespaces "rgb([0-9]+\,\s?[0-9]+\,\s?[[0-9]+)"

Aydin · Accepted Answer · 2015-04-23 16:52:31Z

1

Would be something like this...

string hexRegex = @"fill[:=]""?(#[a-fA-F0-9]{6})""?";
string rgbRegex = @"fill[:=]""?(rgb\( *\d{1,3} *, *?\d{1,3} *, *\d{1,3} *\))""?";
string oneRegex = string.Format("({0}|{1})", hexRegex, rgbRegex);

string testdata = @"fill:#303744" + 
                  @"fill=""#020202""" +
                  @"fill:rgb(48,49,55)" +
                  @"fill=""rgb(205,149,36)""";

IEnumerable<string> colorCodes = Regex.Matches(testdata, oneRegex)
                                      .Cast<Match>()
                                      .Select(match => match.Groups[1].Value.Replace(" ",""));

Result

answered Apr 23, 2015 at 16:52

Aydin

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Comments

Devin Goble · Accepted Answer · 2015-04-23 17:10:19Z

0

Here's the one-liner version:

var hexMatches = Regex.Matches(svg, @"(?<=fill:|="")#[0-9a-fA-F]{6}")
    .Cast<Match>().Select (m => m.Value).ToList();
var rgbMatches = Regex.Matches(svg, @"(?<=fill:|="")rgb\((\d{1,3},?){3}\)")
    .Cast<Match>().Select (m => m.Value).ToList();

You'll notice the use of positive lookbehind's:

(?<=fill:|="")

They are entirely optional and are only there so that you don't get unwanted matches in case some other color values get introduced that aren't a fill. I don't know much about the origins of the file, so I'll leave it up to you to keep them or not.

answered Apr 23, 2015 at 17:10

Devin Goble

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