Store data in variable

krishnakumar kuna

13y1.5k.NET

hello,

I need help

I need to store data's inside variable for later use.

i have a file which look like this

first,second,third,fourth

now i need to store these lines with all string ,did i need to use list or array.

thanks in advance

8 Replies

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Vulpes13y ago
Accepted answer
You could use a list of string arrays for that:

var lines = new List();
string data;
string[] line;
while((data = sr.ReadLine(file)) != null)
{
line=data.split(,)
label1.Text=line[0];
lines.Add(line);
}

You could then access the first field of the first line with lines[0][0] or the i'th field of the j'th line with lines[i][j].
0
krishnakumar kuna13y ago
thank you very much
0
Vulpes13y ago
Yes, if you want to store numbers as well as strings then the best way is to introduce a custom class and then create a list of those.

So here, you'd have:

public class lineclass
{
public string name {get; set}
public int number {get; set;}
}

// ...

var lines = new List();
string data;
string[] line;
while((data = sr.ReadLine(file)) != null)
{
line = data.split(',');
label1.Text = line[0];
lineclass lc = new lineclass();
lc.name = line[0];
lc.number = int.Parse(line[1]);
lines.Add(lc);
}

To access the number property of the i'th line, you'd then use lines[i].number.

Incidentally, in my previous post I should have said that to access the i'th field of the j'th line you'd use lines[j][i] not lines[i][j].
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krishnakumar kuna13y ago
Thank you very much ,if i need to store a number ,i could convert it to string ,but if i need to store as number it self means .

Did i need to create class with how many variable i need to store.

could you please if it is correct

public void lineclass()
{
string name;
int number;
}

and use var lines =new list();

please help i dont know about this thank you
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krishnakumar kuna13y ago
sorry for not telling in explained way.

this will help

A file like this

john,1432,somedata,somedata
kumar,564,somedata,somedata
jai,34241,somedata,somedata

now from the file i need these data for each person or each line to be read and stored in a variable .so, that later from the these variable i will write the data to a database.

now i a m using array where for every loop i need to run insert statement ,but if i use in a collection i could access any line at any time.
eg:
string data
string[] line;
while(data=sr.readline(file)!=null)

{ line=data.split(,)
label1.text=line[0];
}

i access those data inside while loop itself as when the loop loops second time the data in array list get overlaped with new data,as you know better than me.but what i want is i want to access all 5 lines even after the loop is finished.
like after loop is finished

label1.text=line[1][0];(i know this is wrong because this is not a multidimensional array)
for 3rd line
label3.text=linep[3][0]

thanks again.sorry for the trouble.
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Vulpes13y ago
Do you mean that you only want to store lines in the file which have exactly 5 fields and that any others should be ignored?

If so, try this (off 'top of head', untested):

var lines = new List();
using (var sr = new StreamReader("kk.txt"))
{
string line = null;
while((line = sr.ReadLine()) != null)
{
string[] items = line.Split(',');
if (items.Length == 5) lines.Add(line);
}
}
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krishnakumar kuna13y ago
thanks for answer ,
but i need to loop and store all data that is five string values in it and looping through all lines all string should be stored.

how?

thanks in advance
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Vulpes13y ago
You can use an array:

using System.IO;

// ...

string[] lines = File.ReadAllLines("kk.txt");
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