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c# Splitting string to a multi dimensional array?

I encountered a little problem that i can't get my head around.
I have normal string[] array with a text import in it. Every row is stored in separate under every index.
A row usually look something like this:
string[i] = |title1|title2|title3|title4|title5|
string[i+1] = |Word1|Word2|Word3|Word4|Word5|
I want to split these rows and put them in a multi dimensional array.
Already counted how I have to declare the dimensions of the array.
I want to split it now. I was thinking about going through the normal array with two loops and look for the separator while saving the words in a string then copying it to the multi array.
Do you guys have any idea how could i do that, because this is too much hassle for such a small thing.
I want the multi array look something like this:
string[0,0] = title1,
string[0,1] = title2 etc.
string[1,0] = word1
string[1,1] = word2
This is the code that creates the array:
public string [,] SplitArrays(string [] arrayin)
{
long columns = 0;
char line = '|';
string row;
for(int i = 0; i < arrayin.Length;i++)
{
row = arrayin[i];
if (Convert.ToChar(row.Substring(0, 1)) == line)
{
for(int j = 0; j < row.Length;j++)
{
if (Convert.ToChar(row.Substring(j,(j+1))) == line)
{
columns++;
}
}
}
break;
}
int rowlength = arrayin.Length;
string[,] finalarray = new string[columns,rowlength];
And this is how far I got with separating, but I got kind of confuse and I probably messed it up:
int rowcolumncount = 0;
string word = "";
bool next = false;
for(int k = 0; k < arrayin.Length; k++)
{
row = arrayin[k];
for(int l = 0; l < row.Length; l++)
{
if (Convert.ToChar(row[l]) == line)
{
for(int z = 0; next == false;)
{
if(row[z] == line)
{
next = true;
}
else
{
string part = Convert.ToString(row[z]);
word = string.Join("",part);
}
finalarray[l, rowcolumncount] = word;
rowcolumncount++;
}
}
rowcolumncount = 0;
}
}
return finalarray;
}
The main array contains around 12000 lines.
Thank you!

You can try something like this: Split each item with arrayin by | and write these chunks into a line of 2D array:
public string[,] SplitArrays(string[] arrayin) {
if (null == arrayin)
return null;
else if (arrayin.Length <= 0)
return new string[0, 0];
// null : we don't know size (number of columns) before 1st line split
string[,] result = null;
int row = 0;
foreach (var line in arrayin) {
string[] items = line.Split('|');
// - 2 : skip the very first and the very last items which are empty
if (null == result)
result = new string[arrayin.Length, items.Length - 2];
// if line is too short, let's pad result with empty strings
for (int col = 0; col < result.GetLength(1); ++col)
result[row, col] = col + 1 < items.Length - 1
? items[col + 1]
: ""; // padding
row += 1;
}
return result;
}
Usage:
string[] source = new string[] {
"|title1|title2|title3|title4|title5|",
"|Word1|Word2|Word3|Word4|Word5|",
};
// {
// {"title1", "title2", "title3", "title4", "title5"},
// { "Word1", "Word2", "Word3", "Word4", "Word5"}
// }
string[,] array = SplitArrays(source);

If the number of items per line vary, you can use a jagged array.
We create the empty array and set the row count size.
Then we parse all lines of the list and for all line we split it to have desired items to add them into the dimension as we resize the row sub-array.
static public void Test()
{
var list = new string[]
{
"| title1 | title2 | title3 | title4 | title5 |",
"| Word1 | Word2 | Word3 | Word4 | Word5 |"
};
int indexD1 = 0;
string[][] result = null;
Array.Resize(ref result, list.Length);
foreach ( string item in list )
{
var str = item;
str = str.TrimStart('|').TrimStart();
str = str.TrimEnd('|').TrimEnd();
str = str.Replace(" | ", "|");
var items = str.Split('|');
Array.Resize(ref result[indexD1], items.Length);
int indexD2 = 0;
foreach ( string part in items )
result[indexD1][indexD2++] = part;
indexD1++;
}
foreach ( var row in result )
{
foreach ( var str in row )
Console.WriteLine(str);
Console.WriteLine();
}
}
You can also use a List of List of Strings and use the method Add():
var result = new List<List<string>>();

Convert string from text file to integer array

I wrote this code in order to open a text file in a C# language
Each line in the file contains five digits such as
0 0 2 3 6
0 1 4 4 7
0 2 6 9 9
1 0 8 11 9
1 1 12 15 11
2 2 12 17 15
The distance between the number and the other is one tab
The problem is when you execute the program this error appears
input string was not in correct format in Convert.ToInt32(t[j])
code:
string[] st = File.ReadAllLines("C:\\testing\\result.txt");
int[,] tmp = new int[st.Length - 1, 5];
for (int i = 1; i < st.Length; i++)
{
string[] t = st[i].Split(new char[] { ' ' });
int cnt = 0;
for (int k = 0; k < t.Length; k++)
if (t[k] != "")
{ t[cnt] = t[k]; cnt++; }
for (int j = 0; j < 5; j++)
tmp[i - 1, j] = Convert.ToInt32(t[j]);
}
How can i correct that?

I suggest changing the collection type from 2d array int[,] into jagged one int[][] and then use Linq:
using System.Linq;
...
int[][] data = File
.ReadLines(#"C:\testing\result.txt")
.Select(line => line
// Uncomment this if you have empty lines to filter out:
// .Where(line => !string.IsNullOrWhiteSpace(line))
.Split(new char[] {'\t'}, StringSplitOptions.RemoveEmptyEntries)
.Select(item => int.Parse(item))
.ToArray())
.ToArray();

split char should be a tab character '\t' instead of single space

You have five numbers per row, but not necessarily five digits. You will need a more complex solution, like this:
string[] st = File.ReadAllLines("C:\\testing\\result.txt");
int[,] tmp = new int[st.Length - 1, 5];
bool isAlreadyNumber = false;
bool isEmptyRow = true;
int rowIndex = -1;
int colIndex = -1;
for (int i = 0; i < st.Length; i++) {
isAlreadyNumber = false;
isEmptyRow = true;
foreach (char c in st[i]) {
if ((c >= '0') && (c <= '9')) {
if (isAlreadyNumber) {
tmp[rowIndex][colIndex] = tmp[rowIndex][colIndex] * 10 + (c - '0');
} else {
tmp[rowIndex][colIndex] = c - '0';
if (isEmptyRow) rowIndex++;
isEmptyRow = false;
isAlreadyNumber = true;
}
} else {
isAlreadyNumber = false;
}
}
}
Note, that the indexing was fixed. This untested code handles other separators and empty lines as well, but still assumes there will be five numbers.

Read rows/columns of numbers in a text file (c#)

I have a text file with the following numbers for example:
1 2 3
4 5 6
How do I read each individual number into an array?
It needs to move along each row so read in 1, 2 and then 3 into a array of then move to the second row and read 4 5 and 6.. and show the number of cells in a textbox.
this is my code, but I got an error.
List<string> list2 = new List<string>();
for (int i = 0; i < lines.Length; i++)
{
char[] chars = lines[i].ToCharArray();
for (int j = 0; j < chars.Length; j++)
{
if (!Char.IsWhiteSpace(chars[j]))
list2.Add(chars[j].ToString());
}
}

You could convert it to a jagged int array:
int[][] result = text
.Split('\n')
.Select(line =>
line
.Split(' ')
.Select(numberText => int.Parse(numberText))
.ToArray()).ToArray();
Iterate through like this:
foreach (int[] line in result)
{
Console.WriteLine(string.Join(", ", line)); // or iterate through its numbers again
// or whatever you want to do
}
Edit
List<string> list2 = new List<string>();
string path = "xy"; //your path
string[] lines = File.ReadAllLines(path);
int[][] result = lines
.Select(line =>
line
.Split(' ')
.Select(numberText => int.Parse(numberText))
.ToArray()).ToArray();
foreach (int[] line in result)
{
list2.Add(string.Join(", ", line)); // or whatever format you want the text to be
}

if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
label3.Text = openFileDialog1.FileName;
textBox1.Text = File.ReadAllText(label3.Text);
FileStream fs = File.OpenRead(label3.Text);
string[] lines = new StreamReader(fs).ReadToEnd().Split(new string[] { "\r\n", "\r", "\n" }, StringSplitOptions.RemoveEmptyEntries);
fs.Close();
List<string> list2 = new List<string>();
for (int i = 0; i < lines.Length; i++)
{
char[] chars = lines[i].ToCharArray();
for (int j = 0; j < chars.Length; j++)
{
if (!Char.IsWhiteSpace(chars[j]))
list2.Add(chars[j].ToString());
}
}
}

how to read matrix row elements in single line in C# console

I want to read a 5 X 5 matrix from input in console and I want to read row elements in a single line and not in separate lines, like this:
25 16 14 12
10 15 11 10
2 10 9 8 8
7 6 11 20
5 4 1 0 3

Multi line version:
private static int[,] ReadMatrix()
{
var mtr = new int[5, 5];
for (var i = 0; i < 5; i++)
{
var line = Console.ReadLine();
var spl = line.Split(' ');
if (spl.Length != 5) throw new FormatException();
for (var j = 0; j < 5; j++)
mtr[i, j] = int.Parse(spl[j]);
}
return mtr;
}
Single line version:
private static int[,] ReadMatrix()
{
var mtr = new int[5, 5];
var line = Console.ReadLine();
if (string.IsNullOrWhiteSpace(line)) throw new FormatException();
var spl = line.Split(' ');
if (spl.Length != 25) throw new FormatException();
for (var i = 0; i < 25; i++)
mtr[i/5, i%5] = int.Parse(spl[i]);
return mtr;
}

I think this could help: reading two integers in one line using C#
Basicly the string[] tokens = Console.ReadLine().Split(); and then you could call tokens.Length to see how many columns there r going to be.

i used this function to read elements
static int readIndex()
{
string num = string.Empty;
ConsoleKeyInfo cr;
do
{
cr = Console.ReadKey(true);
int n;
if (int.TryParse(cr.KeyChar.ToString(), out n))
{
num += cr.KeyChar.ToString();
Console.Write(cr.KeyChar.ToString());
}
else if (cr.Key == ConsoleKey.Backspace)
{
if (num.Length > 0)
{
Console.Write("\b");
num = num.Remove(num.Length - 1);
}
}
} while (cr.Key != ConsoleKey.Enter);
Console.Write(" ");
return int.Parse(num);
}
then we need just a loop to read elements like this
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
mat[i, j] = (int)readIndex();
}
Console.WriteLine();
}

How to replace space/character with specified character after first numeric value in string using C#?

I have String containing Special Characters & Numeric Values .
Eg:
3-3 3
3-3"3/4
3-3-3/4
3-3 3/4
3 3 3
3'3 3
Output must be:
3f3 3
3f3"3/4
3f3-3/4
3f3 3/4
3f3 3
3f3 3
I have tried using :
public static string ReplaceFirst(string text, string search, string replace)
{
int pos = text.IndexOf(search);
if (pos < 0)
{
return text;
}
return text.Substring(0, pos) + replace + text.Substring(pos + search.Length);
}
using above code it replaces the first occurrence with specified character this works fine.
Eg: 3-3 3 Output: 3f3 3
But for 3 3-3 Output: 3 3f3 according to code is correct. but i want to replace space/character after first numeric which would be 3f3-3
Help Appreciated!

Simple loops should work.
for(int i =0; i < myListOfStrings.Count; i++)
{
char[] chars = myListOfStrings[i].ToCharArray();
for (int j = 0; j < chars.Count(); j++)
{
if (Char.IsDigit(chars[j]))
{
if(j + 1 < chars.Count())
{
chars[j + 1] = 'f'; //'f' being your replacing character
myListOfStrings[i] = new string(chars);
}
break;
}
}
}
Output examples
myListOfStrings.Add("3-3 3");
myListOfStrings.Add("3-3-3/4");
myListOfStrings.Add("3 3-3");
myListOfStrings.Add("3 3 3");
3f3 3
3f3-3/4
3f3-3
3f3 3
Update from comments
for (int i = 0; i < myListOfStrings.Count; i++)
{
char[] chars = myListOfStrings[i].ToCharArray();
for (int j = 0; j < chars.Count(); j++)
{
if (!Char.IsDigit(chars[j]))
{
if (j + 1 < chars.Count())
{
chars[j] = 'f'; //'f' being your replacing character
myListOfStrings[i] = new string(chars);
}
break;
}
}
}

var match = Regex.Match(text, search); //To search for any special character, use #"\W" as the second parameter
var editable = text.ToCharArray();
editable[match.Index] = replace[0];
text = new String(editable);
return text;

Following worked for me:
Modified Code:
string S="10-3 3";
char[] chars = S.ToCharArray();
for (int j = 0; j < chars.Count(); j++)
{
if (Char.IsDigit(chars[j]))
{
}
else
{
if (j + 1 < chars.Count())
{
chars[j] = 'f'; //'f' being replacing character
S = new string(chars);
}
break;
}
}
Output: 10f3 3