C# create configuration file - c#-4.0

Question

This code How can I create configuration file if so that i can change connection string easy
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;
using mshtml;
namespace tabcontrolweb
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string MyConString = "SERVER=192.168.0.78;" +
"DATABASE=webboard;" +
"UID=aimja;" +
"PASSWORD=aimjawork;" +
"charset=utf8;";
MySqlConnection connection = new MySqlConnection(MyConString);
MySqlCommand command = connection.CreateCommand();
MySqlDataReader Reader;
command.CommandText = "SELECT urlwebboard FROM `listweb` WHERE `urlwebboard` IS NOT NULL AND ( `webbordkind` = 'เว็บท้องถิ่น' ) and `nourl`= 'n' order by province, amphore limit 4 ";
connection.Open();
Reader = command.ExecuteReader();
string[] urls = new string[4];
string thisrow = "";
string sumthisrow = "";
while (Reader.Read())
{
thisrow = "";
for (int i = 0; i < Reader.FieldCount; i++)
{
thisrow += Reader.GetValue(i).ToString();
System.IO.File.AppendAllText(#"C:\file.txt", thisrow + " " + Environment.NewLine);
sumthisrow = Reader.GetValue(Reader.FieldCount - 1).ToString();
}
for (int m = 0; m < 4 ; m++)
{
urls[m] = sumthisrow;
MessageBox.Show(urls[m]);
}
webBrowser1.Navigate(new Uri(urls[0]));
webBrowser1.Dock = DockStyle.Fill;
webBrowser2.Navigate(new Uri(urls[1]));
webBrowser2.Dock = DockStyle.Fill;
webBrowser3.Navigate(new Uri(urls[2]));
webBrowser3.Dock = DockStyle.Fill;
webBrowser4.Navigate(new Uri(urls[3]));
webBrowser4.Dock = DockStyle.Fill;
}
connection.Close();
}
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
//if (webBrowser1.Document != null)
//{
// IHTMLDocument2 document = webBrowser1.Document.DomDocument as IHTMLDocument2;
// if (document != null)
// {
// IHTMLSelectionObject currentSelection = document.selection;
// IHTMLTxtRange range = currentSelection.createRange() as IHTMLTxtRange;
// if (range != null)
// {
// const String search = "We";
// if (range.findText(search, search.Length, 2))
// {
// range.select();
// }
// }
// }
//}
}
}
}

Answer 1

You can create an XML configuration file looking like this :
<db-config>
<server>192.168.0.78</server>
<database>webboard</database>
<...>...</...>
</db-config>
Then, use XMLTextReader to parse it.
Here is a basic example of how you can use it to parse XML files :
using System;
using System.Xml;
namespace ReadXMLfromFile
{
/// <summary>
/// Summary description for Class1.
/// </summary>
class Class1
{
static void Main(string[] args)
{
XmlTextReader reader = new XmlTextReader ("books.xml");
while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element: // The node is an element.
Console.Write("<" + reader.Name);
Console.WriteLine(">");
break;
case XmlNodeType.Text: //Display the text in each element.
Console.WriteLine (reader.Value);
break;
case XmlNodeType.EndElement: //Display the end of the element.
Console.Write("</" + reader.Name);
Console.WriteLine(">");
break;
}
}
Console.ReadLine();
}
}
}
Hint : Use the ReadTofollowing() to get your values.
Once your XML DB Config Reader class is done, you use it each time you need a new connection, and you'll only need to change your DB Config XML file to change your DB Connections configuration.
Edit : there is an interesting article about Storing database connection settings in .NET here.

Answer 2

Use the default
System.Configuration.ConfigurationManager
that C# supports!

Answer 3

See: http://msdn.microsoft.com/en-us/library/bb397750.aspx