File attributes with C#

The class I've posted shows how to use the fiel attributes with c#.
To get file attributes (in .Net) you need more steps, with this class you have immediatly all you need.
I covered the 4 standard attribute but you can extend the class with other attributes. The file is .called FileAttributeEx.cs and this it the code.

using System;
using System.IO;

namespace FileAttributeEx
{
class FileAttributesEx
{
private string filepath = string.Empty;

public string FilePath
{
get { return filepath; }
set { filepath = value;}
}

public FileAttributesEx() { }
public FileAttributesEx(string path)
{
FilePath = path;
}

public bool isReadOnly ()
{
return (File.GetAttributes(FilePath) & FileAttributes.ReadOnly) == FileAttributes.ReadOnly;
}

public bool isHidden()
{
return (File.GetAttributes(FilePath) & FileAttributes.Hidden) == FileAttributes.Hidden;
}

public bool isArchive()
{
return (File.GetAttributes(FilePath) & FileAttributes.Archive) == FileAttributes.Archive;
}

public bool isSystem()
{
return (File.GetAttributes(FilePath) & FileAttributes.System) == FileAttributes.System;
}

public void AddSystem()
{
File.SetAttributes(FilePath, File.GetAttributes(FilePath) | FileAttributes.System);
}

public void AddReadOnly()
{
File.SetAttributes(FilePath, File.GetAttributes(FilePath) | FileAttributes.ReadOnly);
}

public void AddHidden()
{
File.SetAttributes(FilePath, File.GetAttributes(FilePath) | FileAttributes.Hidden);
}

public void AddArchive()
{
File.SetAttributes(FilePath, File.GetAttributes(FilePath) | FileAttributes.Archive);
}

public void Clear()
{
File.SetAttributes(filepath, File.GetAttributes(filepath)
& ~(FileAttributes.Archive | FileAttributes.ReadOnly| FileAttributes.System|FileAttributes.Hidden));
}
}
}

To use it in your project simply, add the file to your project, add a new instance of it and call the metods you need.
Here a sample:

FileAttributesEx fileAttr = new FileAttributesEx(sFileName);

if (fileAttr.isArchive())
//Do something
if (fileAttr.isHidden())
//Do something

fileAttr.Clear();

fileAttr.AddReadOnly();

Have fun.

How to convert string to byte array and viceversa

The way to convert a string to byte array are a lot. Here I show you one I use over all, UnicodeEncoding.
Sample:

char[] arrUnicodeSample = new char[] { '\uAAAA', '\uBBBB', '\uCCCC', '\uDFFF' };
string strUnicode = new string(arrUnicodeSample);

{
UnicodeEncoding encUnicode = new UnicodeEncoding ();
byte[] encodedBytes = encUnicode.GetBytes(strUnicode);
String decodedString = encUnicode.GetString(encodedBytes, 0, encodedBytes.Length);
}

You can also use:

• Encoding
  
• ASCIIEncoding
  
• UnicodeEncoding

and Decoder to come back.

My new article on Code Project: Mobile TouchPad

Finally I've found some free time to write a full article.
The article describe how to write a mobile program and show you how it's simple. In particular Mobile TouchPad lets you control your PC through your touch pad phones.
MobileTouchPad[^]
Have fun.

How to convert class/struct to a byte array

With this class you can easy convert your class/struct to a byte array.
Very useful when using the socket.

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

class CommonConvertion
{
public static byte[] StructureToByteArray(object obj)
{
int Length = Marshal.SizeOf(obj);
byte[] bytearray = new byte[Length];
IntPtr ptr = Marshal.AllocHGlobal(Length);
Marshal.StructureToPtr(obj, ptr, false);
Marshal.Copy(ptr, bytearray, 0, Length);
Marshal.FreeHGlobal(ptr);
return bytearray;
}

public static void ByteArrayToStructure(byte[] bytearray, ref object obj)
{
int Length = Marshal.SizeOf(obj);
IntPtr ptr = Marshal.AllocHGlobal(Length);
Marshal.Copy(bytearray, 0, ptr, Length);
obj = Marshal.PtrToStructure(ptr, obj.GetType());
Marshal.FreeHGlobal(ptr);
}
}

Have fun.

Windows Mouse Control

With this class you can easy control the mouse from c#. For the click event it's use the P/Invoke of mouse_event API. To move the cursor positon use directly the managed code.
(Only for x86.)

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace MouseMov
{
public class MouseHook
{
[DllImport("user32.dll")]
private static extern void mouse_event(UInt32 dwFlags, UInt32 dx, UInt32 dy, UInt32 dwData, IntPtr dwExtraInfo);
private const UInt32 MOUSEEVENTF_LEFTDOWN = 0x0002;
private const UInt32 MOUSEEVENTF_LEFTUP = 0x0004;

internal static void SendDoubleClick()
{
SendClick();
SendClick();
}

internal static void SendClick()
{
SendDown();
SendUp();
}

internal static void SendUp()
{
mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, new System.IntPtr());
}
private void MoveMouse(Point p)
{
Cursor.Position = new Point(Cursor.Position.X + p.X, Cursor.Position.Y + p.Y);
}


internal static void SendDown()
{
mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, new System.IntPtr());
}
}
}

Have fun.

CSharp NumericTextBox control

I've post here a simple custom control that it accepts only numeric input.
The only one methods in the OnKeyPress (overrided) and accept only digit or the backspace

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

using DrLuiji.Controls
{
public class NumericTextBox : TextBox
{     
  protected override void OnKeyPress(KeyPressEventArgs e)
  {
      base.OnKeyPress(e); 
      if (!((Char.IsDigit(e.KeyChar))||(e.KeyChar.Equals('\b'))))
      {         
          e.Handled = true;     
          ErrorBeep();
      }
 }
    public void ErrorBeep()
 {
           //Console.Beep();
 }
}
}

To use it you just drag & drop the control from the toolbox to your form.

Have fun.

Retrieve system folder c#

Here you can find a way to retrieve the system folder.
Very simple, call the System.Environment.GetFolderPath with the corrisponding enum System.Environment.SpecialFolder.See the sample below.

private string GetSystemSpecialFolderDirectory()
{
//Program files
string sProgramFilesFolder = System.Environment.GetFolderPath(
System.Environment.SpecialFolder.ProgramFiles);

//Personal
string sPersonalFolder = System.Environment.GetFolderPath (
System.Environment.SpecialFolder.Personal);

//Desktop
string sDesktopFolder = System.Environment.GetFolderPath(
System.Environment.SpecialFolder.DesktopDirectory);

//Application Data
string sApplicationDataFolder = System.Environment.GetFolderPath(
System.Environment.SpecialFolder.ApplicationData);

//System:
string sSystemFolder = System.Environment.GetFolderPath(
System.Environment.SpecialFolder.System);


MessageBox.Show("Program files: " + sProgramFilesFolder +
"\r\nPersonal: " + sPersonalFolder +
"\r\nDesktop: " + sDesktopFolder +
"\r\nApplication Data: " + sApplicationDataFolder +
"\r\nSystem: " + sSystemFolder);
}

Very simple isn't it ?