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How To Repeat Split Method After X Times?

I have a .txt file which I would like to split using the split method. My current code is:
string[] alltext = File.ReadAllText(fullPath).Split(new[] { ',' }, 3);
The problem I now have is that I want it to loop through the whole in a way that it always splits the text into three pieces that belong together. If I have a text with:
testing, testing,
buenooo diasssss
testing, testing,
buenooo diasssss
testing, testing,
buenooo diasssss
(the format here is hard to display, but want to show that they are on different lines, so reading line by line will most likely not be possible)
I want "testing", "testing", "buenooo diasssss" to be dispalyed on my console althought they are on different lines.
If I would do it with lines I would simply loop through each line, but this does not work in this case.

You can first remove "\r\n"(new line) from the text, then split and select the first three items.
var alltext = File.ReadAllText(fullPath).Replace("\r\n","").Split(',').ToList().Take(3);
foreach(var item in alltext)
Console.WriteLine(item);
Edit
If you want all three items to be displayed in one line in the console:
int lineNumber = 0;
var alltext = File.ReadAllText(fullPath).Split(new string[] { "\r\n", "," }, StringSplitOptions.None).ToList();
alltext.RemoveAll(item => item == "");
while (lineNumber * 3 < alltext.Count)
{
var tempList = alltext.Skip(lineNumber * 3).Take(3).ToList(); ;
lineNumber++;
Console.WriteLine("line {0} => {1}, {2}, {3}",lineNumber, tempList[0], tempList[1], tempList[2]);
}
result:

Try this:
var data =
File.ReadLines(fullpath)
.Select((x, n) => (line: x, group: n / 3))
.GroupBy(x => x.group, x => x.line)
.Select(x =>
String
.Concat(x)
.Split(',', StringSplitOptions.RemoveEmptyEntries)
.Select(x => x.Trim()));
That gives me:

C# convert hex string to uint array

I have a body of text that is innertext inside of an XML. Here are 3 lines of that string for example
0x2007A3C8,0xAE8900B8,
0x2007A3CC,0x000E5320,
0x2007A3D0,0x03E00008
So the innertext property is a string. I am trying to convert this entire string back into an uint array. So that for every comma adds a new array element.
x , x
x , x
Would be a total of 4 array elements.
I want to keep the hex syntax, everything. I just need this back into an uint array. Any ideas?

It should be as simple as this:
string input = "0x2007A3C8,0xAE8900B8, 0x2007A3CC,0x000E5320, 0x2007A3D0,0x03E00008";
string[] strNumbers = input.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
uint[] numbers = Array.ConvertAll(strNumbers, z => Convert.ToUInt32(z.Trim(), 16));

I'd definitely propose using LINQ for that:
var initialString = "0x2007A3C8,0xAE8900B8,\n0x2007A3CC,0x000E5320,\n0x2007A3D0,0x03E00008";
var unsignedValues = initialString
.Split(',')
.Select(n => Convert.ToUInt32(n.Trim(), 16));
Don't really understand about "keeping the hex syntax", but you can sustain it like this, I guess:
var initialString = "0x2007A3C8,0xAE8900B8,\n0x2007A3CC,0x000E5320,\n0x2007A3D0,0x03E00008";
var unsignedValues = initialString
.Split(',')
.Select(n => "0x" + Convert.ToUInt32(n.Trim(),16));

reading in text file and spliting by comma in c#

I have a text file whose format is like this
Number,Name,Age
I want to read "Number" at the first column of this text file into an array to find duplication. here is the two ways i tried to read in the file.
string[] account = File.ReadAllLines(path);
string readtext = File.ReadAllText(path);
But every time i try to split the array to just get whats to the left of the first comma i fail. Have any ideas? Thanks.

You need to explicitly split the data to access its various parts. How would your program otherwise be able to decide that it is separated by commas?
The easiest approach to access the number that comes to my mind goes something like this:
var lines = File.ReadAllLines(path);
var firstLine = lines[0];
var fields = firstLine.Split(',');
var number = fields[0]; // Voilla!
You could go further by parsing the number as an int or another numeric type (if it really is a number). On the other hand, if you just want to test for uniqueness, this is not really necessary.

If you want all duplicate lines according to the Number:
var numDuplicates = File.ReadLines(path)
.Select(l => l.Trim().Split(','))
.Where(arr => arr.Length >= 3)
.Select(arr => new {
Number = arr[0].Trim(),
Name = arr[1].Trim(),
Age = arr[2].Trim()
})
.GroupBy(x => x.Number)
.Where(g => g.Count() > 1);
foreach(var dupNumGroup in numDuplicates)
Console.WriteLine("Number:{0} Names:{1} Ages:{2}"
, dupNumGroup.Key
, string.Join(",", dupNumGroup.Select(x => x.Name))
, string.Join(",", dupNumGroup.Select(x => x.Age)));

If you are looking specifically for a string.split solution, here is a really simple method of doing what you are looking for:
List<int> importedNumbers = new List<int>();
// Read our file in to an array of strings
var fileContents = System.IO.File.ReadAllLines(path);
// Iterate over the strings and split them in to their respective columns
foreach (string line in fileContents)
{
var fields = line.Split(',');
if (fields.Count() < 3)
throw new Exception("We need at least 3 fields per line."); // You would REALLY do something else here...
// You would probably want to be more careful about your int parsing... (use TryParse)
var number = int.Parse(fields[0]);
var name = fields[1];
var age = int.Parse(fields[2]);
// if we already imported this number, continue on to the next record
if (importedNumbers.Contains(number))
continue; // You might also update the existing record at this point instead of just skipping...
importedNumbers.Add(number); // Keep track of numbers we have imported
}

Find the certain text in the line and then return that line in C#

I have a big file and for the simplicity I am just showing a small part of it. The data looks like following:
NPSER NASER NQSER
10 5 3
TSSR MPSER JDNSR
15 10 6
What I need to do is to find for example NPSER and NASER and then assign the values NPSER as 10, NASER as 5 and NQSER as 3. For this small data set I could do as following:
TextReader infile = new StreamReader(fileName);
string line;
int NPSER, NASER, NQSER;
line = infile.ReadLine();
string[] words = line.Split('\t');
NPSER = Convert.ToInt32(words[0]);
NASER = Convert.ToInt32(words[1]);
NQSER = Convert.ToInt32(words[2]);
infile.Close();
Instead of reading each line and assigning values, I want to write a function which will automatically fetch the line when I search upto three words in a line which would be easier and efficient for longer application.
I would appreciate other methods as well.

It would be easier if you can use LINQ:
var line = File.ReadLines("path")
.SkipWhile(line => !line.Contains("NPSER")) // change this condition to suit your needs
.Skip(1)
.First();
var values = line.Split(new[] { ' '},StringSplitOptions.RemoveEmptyEntries)
.Select(int.Parse)
.ToArray();
int NPSER = values[0];
int NASER = values[1];
int NQSER = values[2];

C# - How to parse text file (space delimited numbers)?

Given a data file delimited by space,
10 10 10 10 222 331
2 3 3 4 45
4 2 2 4
How to read this file and load into an Array
Thank you

var fileContent = File.ReadAllText(fileName);
var array = fileContent.Split((string[])null, StringSplitOptions.RemoveEmptyEntries);
if you have numbers only and need a list of int as a result, you can do this:
var numbers = array.Select(arg => int.Parse(arg)).ToList();

It depends on the kind of array you want. If you want to flatten everything into a single-dimensional array, go with Alex Aza's answer, otherwise, if you want a 2-dimensional array that maps to the lines and elements within the text file:
var array = File.ReadAllLines(filename)
.Select(line => line.Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries))
.Where(line => !string.IsNullOrWhiteSpace(line)) // Use this to filter blank lines.
.Select(int.Parse) // Assuming you want an int array.
.ToArray();
Be aware that there is no error handling, so if parsing fails, the above code will throw an exception.

You will be interested in StreamReader.ReadLine() and String.Split()

I couldn't get Quick Joe Smith's answer to work, so I modified it. I put the modified code into a static method within a "FileReader" class:
public static double[][] readWhitespaceDelimitedDoubles(string[] input)
{
double[][] array = input.Where(line => !String.IsNullOrWhiteSpace(line)) // Use this to filter blank lines.
.Select(line => line.Split((string[])null, StringSplitOptions.RemoveEmptyEntries))
.Select(line => line.Select(element => double.Parse(element)))
.Select(line => line.ToArray())
.ToArray();
return array;
}
For my application, I was parsing for double as opposed to int. To call the code, try using something like this:
string[] fileContents = System.IO.File.ReadAllLines(openFileDialog1.FileName);
double[][] fileContentsArray = FileReader.readWhitespaceDelimitedDoubles(fileContents);
Console.WriteLine("Number of Rows: {0,3}", fileContentsArray.Length);
Console.WriteLine("Number of Cols: {0,3}", fileContentsArray[0].Length);