Solved

read a file and get a field

Posted on 2011-09-15
4
202 Views
Last Modified: 2012-05-12
Hi Experts,

I am new to C#, any help would be appreciated.

I want to know how to get a field from a file. for example

my file has content:

col1,col2,col3,col4,col5
aaa,bbb,ccc,ddd,eee
111,222,333,444,555
AAA,BBB,CCC,DDD,EEE

How can I display col3?

Thanks


0
Comment
Question by:justinY
  • 2
4 Comments
 
LVL 22

Accepted Solution

by:
pivar earned 63 total points
ID: 36546186
Hi,

You could, for instance, use ReadLine and Split

System.IO.StreamReader file = new System.IO.StreamReader("c:\\file.txt");
string line;

while((line = file.ReadLine()) != null)
{
   string[] cols = line.Split(',');
   Console.WriteLine(cols[2]);
}

file.Close();
0
 
LVL 12

Assisted Solution

by:rajapandian_81
rajapandian_81 earned 62 total points
ID: 36547372
Hi,

Try below code. I have stored my text file in c drive with name "Test.txt". I will display the col3 in dataGridView.

string strFileName = "Test.txt";
string strDirName = "c:\\";
DataTable dt;

using (OleDbConnection con =
       new OleDbConnection(@"Provider=Microsoft.Jet.OleDb.4.0;" +
       "Data Source=" + strDirName + ";" +
       "Extended Properties=\"Text;HDR=Yes;FMT=Delimited\""))
{
	con.Open();

        using (OleDbDataAdapter adapter =
               new OleDbDataAdapter("SELECT * FROM " + strFileName, con))
        {
        	dt = new DataTable("Customer");
                adapter.Fill(dt);
        }
}
            
dataGridView1.DataSource = dt.DefaultView.ToTable(false, new string[] { "col3" });

Open in new window

0
 

Author Comment

by:justinY
ID: 36550354
rajapandian_81,

I got this error

Error1      The name 'dataGridView1' does not exist in the current context      
0
 
LVL 12

Expert Comment

by:rajapandian_81
ID: 36558261
Hi,

Add dataGridView to your form from toolbox and name it as dataGridView1.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: Najam
Having new technologies does not mean they will completely replace old components.  Recently I had to create WCF that will be called by VB6 component.  Here I will describe what steps one should follow while doing so, please feel free to post any qu…
This article introduced a TextBox that supports transparent background.   Introduction TextBox is the most widely used control component in GUI design. Most GUI controls do not support transparent background and more or less do not have the…
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question