CODEWITHSUNDEEP
c#string
Manoj Savalia
Manoj Savalia

Reputation: 1402

How to convert string line into fix size array?

I am reading .txt file in c#. I have one problem like my txt file contain more then 2000 lines and it will take lots of time to execute because currently i am read line by line and use sub-string function for split data. Each line contain one employee detail. In line i get data into fix position like,

Employee Name     = 0 to 50 Character,
Employee Address  = 51 to 200 Character,
Employee BDate    = 201 to 215 Character,
Employee Gender   = 216 to 220 Character

etc..

Is there any technique to read line and split it to array or something else with this field? I want to improve performance.

Upvotes: 1

Views: 128

Answers (4)

petchirajan
petchirajan

Reputation: 4362

You can use Parallel ForEach for improve performance. Refer the below code.

public class Employee
{
   public string Name { get; set; }
   public string Address { get; set; }
   public string DOB { get; set; }
   public string Gender { get; set; }
}

var textLines = File.ReadAllLines("FileName.txt");
var employees = new List<Employee>();
Parallel.ForEach(textLines,
    emp =>
    employees.Add(new Employee()
    {
       Name = emp.Substring(51),
       Address = emp.Substring(51, 150),
       DOB = emp.Substring(201, 15),
       Gender = emp.Substring(216, 5)
    }));

Upvotes: 1

w.b
w.b

Reputation: 11238

You can use File.ReadLines which will give you IEnumerable<string>:

Employee[] employees = new Employee[2000];

int index = 0;

foreach (var line in File.ReadLines("data.txt")) 
{
    var employee = new Employee();
    employee.Name = line.Substring(0,50);
    employee.Address = line.Substring(51,150);
    employee.BDate = line.Substring(201,15);
    employee.Gender = line.Substring(216,5);
    employees[index++] = employee;
}

Upvotes: 2

H&#229;kan Fahlstedt
H&#229;kan Fahlstedt

Reputation: 2095

You could use File.ReadAllLines():

var textLines = File.ReadAllLines();

foreach (var line in textLines)
{
   var name = line.Substring(51);
   var address = line.Substring(51,150);
   var bdate = line.Substring(201, 15);
   var gender = line.Substring(216,5);
}

Upvotes: 1

DeveloperGuo
DeveloperGuo

Reputation: 636

Use ReadToEnd() if you're going to need to read all 2000+ lines. Then you can execute the line parsing in parallel.

Upvotes: 1

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