how to save settings to registry

Question

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Text.RegularExpressions;

using System.Drawing;

using Microsoft.Win32;

namespace SettingsFile

{

public partial class LogForm : Form

{

public LogForm()

{

InitializeComponent();

var settingsFilePath = GetFileName();

btnOk.Enabled = false;

btnOpenFile.Enabled = true;

}

private void SetControls(IEnumerable<string> settings)

{

foreach (var setting in settings.Where(setting => setting.Contains("=")))

{

switch (setting.Split('=')[0].Trim())

{

case "EnableLogging":

chkLoggin.Checked = Convert.ToBoolean(setting.Split('=')[1].Trim());

break;

case "LogFilePath":

txtFilePath.Text = setting.Split('=')[1].Trim();

break;

case "NumberOfThreads":

txtNumOfThreads.Text = setting.Split('=')[1].Trim();

break;

}

}

}

private void btnOk_Click(object sender, EventArgs e)

{

var settingsFilePath = GetFileName();

foreach (Control control in this.Controls)

{

control.Focus();

if (Validate())

{

StringBuilder sb = new StringBuilder();

sb.AppendFormat("EnableLogging = {0}", chkLoggin.Checked).AppendLine();

sb.AppendFormat("LogFilePath = {0}", txtFilePath.Text).AppendLine();

sb.AppendFormat("NumberOfThreads = {0}", txtNumOfThreads.Text).AppendLine();

// File.WriteAllText(GetFileName(), sb.ToString());

Close();

}

}

}

private void btnOpenFile_Click(object sender, EventArgs e)

{

OpenFileDialog openFileDialog1 = new OpenFileDialog();

var dialogResult = openFileDialog1.ShowDialog();

if (dialogResult == DialogResult.OK)

{

txtFilePath.Text = openFileDialog1.FileName;

}

}

private void txtNumOfThreads_KeyPress(object sender, KeyPressEventArgs e)

{

if (!char.IsControl(e.KeyChar)

&& !char.IsDigit(e.KeyChar))

{

e.Handled = true;

}

}

private void txtNumOfThreads_KeyDown(object sender, KeyEventArgs e)

{

if (e.KeyCode == Keys.Enter)

{

e.SuppressKeyPress = true;

}

if (e.Control)

{

switch (e.KeyCode)

{

case Keys.C:

case Keys.P:

case Keys.X:

e.Handled = true;

txtNumOfThreads.SelectionLength = 0;

break;

}

}

}

private void txtNumOfThreads_Enter(object sender, EventArgs e)

{

Clipboard.Clear();

}

private void SetDirty()

{

btnOk.Enabled = true;

}

private void chkLoggin_CheckedChanged(object sender, EventArgs e)

{

SetDirty();

}

private void txtFilePath_TextChanged_1(object sender, EventArgs e)

{

SetDirty();

}

private void txtNumOfThreads_TextChanged(object sender, EventArgs e)

{

SetDirty();

}

private void btnCancel_Click(object sender, EventArgs e)

{

Close();

}

public static object GetFileName()

{

string app_name = "SettingsFile";

string name = "";

object default_value = "";

// var app_name = "SettingsFile";

RegistryKey reg_key = Registry.LocalMachine.OpenSubKey("Software", true);

RegistryKey sub_key = reg_key.CreateSubKey(app_name);

return sub_key.GetValue(name, default_value);

}

private Boolean Validate()

{

bool isValid = false;

if (string.IsNullOrEmpty(txtFilePath.Text))

{

txtFilePath.BackColor = Color.Red;

}

else if (Regex.IsMatch(txtFilePath.Text, @"^(?!^(PRN|AUX|CLOCK\$|NUL|CON|COM\d|LPT\d|\..*)(\..+)?$)[^\x00-\x1f\\?*:\"";|/]+$"))

{

txtFilePath.BackColor = Color.Red;

}

else

{

txtFilePath.BackColor = DefaultBackColor;

isValid = true;

}

return isValid;

}

}

}