Solved

c# write database to text file

Posted on 2010-11-29
3
352 Views
Last Modified: 2012-05-10

the code below output is
thisrowthisrowthisrowthisrowthisrowthisrow

How can I change it to value from database i think must correct this statement
( System.IO.File.AppendAllText(@"C:\file.txt", "thisrow");)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using MySql.Data.MySqlClient;
using System.Web;


namespace WindowsFormsApplication1
{


   
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            string MyConString = "SERVER=localhost;" +
                "DATABASE=registration;" +
                "UID=root;" +
                "PASSWORD='';";
            MySqlConnection connection = new MySqlConnection(MyConString);
            MySqlCommand command = connection.CreateCommand();
            MySqlDataReader Reader;
            command.CommandText = "select * from teera";
            connection.Open();
            Reader = command.ExecuteReader();
            while (Reader.Read())
            {
                string thisrow = "";
                for (int i = 0; i < Reader.FieldCount; i++)
                    thisrow += Reader.GetValue(i).ToString() + ",";
                listBox1.Items.Add(thisrow);
                System.IO.File.AppendAllText(@"C:\file.txt", "thisrow");
            }
            connection.Close();

        }
    }
}

Open in new window

0
Comment
Question by:teera
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 30

Expert Comment

by:anarki_jimbel
ID: 34235809
change to:

System.IO.File.AppendAllText(@"C:\file.txt", thisrow + Environment.NewLine) // remove quotations
0
 
LVL 30

Accepted Solution

by:
anarki_jimbel earned 500 total points
ID: 34235905
Just to add :)

According to my comment in another question, i'd change the code as below.
Benefits:
 - just one use of IO, this is much faster
 - also, you may close connection earlier, not waiting for time-consuming IO operations

The first one might be very important if you have hundreds of lines. Also, your UI will respond faster, I believe.
string MyConString = "SERVER=localhost;" +
                "DATABASE=registration;" +
                "UID=root;" +
                "PASSWORD='';";
            MySqlConnection connection = new MySqlConnection(MyConString);
            MySqlCommand command = connection.CreateCommand();
            MySqlDataReader Reader;
            command.CommandText = "select * from teera";
            connection.Open();
            Reader = command.ExecuteReader();
            StringBuilder sb = new StringBuilder();
            while (Reader.Read())
            {
                string thisrow = "";
                for (int i = 0; i < Reader.FieldCount; i++)
                    thisrow += Reader.GetValue(i).ToString() + ",";
                listBox1.Items.Add(thisrow);
                //System.IO.File.AppendAllText(@"C:\file.txt", "thisrow");
                sb.Append(s + Environment.NewLine);
            }
            connection.Close();
            System.IO.File.WriteAllText(@"C:\path\to\file.txt", sb.ToString());

Open in new window

0
 

Author Closing Comment

by:teera
ID: 34235948
Thank you
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

Suggested Solutions

Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial

751 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