This example shows how to print out the command line arguments using foreach.
Usage:
foreach (string argument in Environment.GetCommandLineArgs())
{
Console.WriteLine(argument);
}
This example shows how to compare dates using C#.
Usage 1:
DateTime dateTime1 = DateTime.Parse("05/05/2009");
DateTime dateTime2 = DateTime.Now;
if (dateTime1.Date > dateTime2.Date)
{
//It's later date
}
else
{
//It's earlier or equal date
}
Usage 2:
int result = DateTime.Compare(dateTime1, dateTime2);
if (result < 0)
{
//it is earlier
}
else if (result == 0)
{
//it is the same time as
}
else
{
//it is later
}
This example shows how to create a MD5 hash from a string.
Usage:
string hash = CreateMD5Hash("http://www.csharpexamples.com");
Console.WriteLine(hash);
//Output:
//E426A83F137FA324C3412B92193EED1F
public string CreateMD5Hash(string input)
{
// Step 1, calculate MD5 hash from input
MD5 md5 = System.Security.Cryptography.MD5.Create();
byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
byte[] hashBytes = md5.ComputeHash(inputBytes);
// Step 2, convert byte array to hex string
StringBuilder sb = new StringBuilder();
for (int i = 0; i < hashBytes.Length; i++)
{
sb.Append(hashBytes[i].ToString("X2"));
}
return sb.ToString();
}
This example shows how to empty the recycle bin using C#. First we will need to define the following function that will be empty the recycle bin:
[DllImport("Shell32.dll", CharSet = CharSet.Unicode)]
static extern uint SHEmptyRecycleBin (IntPtr hwnd, string pszRootPath, RecycleFlags dwFlags);
public enum RecycleFlags : uint
{
SHERB_NOCONFIRMATION = 0x00000001,
SHERB_NOPROGRESSUI = 0x00000002,
SHERB_NOSOUND = 0x00000004
}
Usage:
uint result = SHEmptyRecycleBin(IntPtr.Zero, null, RecycleFlags.SHERB_NOCONFIRMATION);
This example shows how to open and close the tray of the CD drive. First we will need to define the following function that will be opening the disk tray:
[DllImport("winmm.dll", EntryPoint = "mciSendString")]
public static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);
Usage:
//To open
int result = mciSendString("set cdaudio door open", null, 0, 0);
//To close
result = mciSendString("set cdaudio door closed", null, 0, 0);