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This example demonstrates the usage of System.Environment type:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Program
{
class Program
{
static int Main(string[] args)
{
ShowEnvironmentDetails();
Console.ReadLine();
return -1;
}
static void ShowEnvironmentDetails()
{
// Print out the drives on this pc,
// OS version and other details.
foreach (string drive in Environment.GetLogicalDrives())
Console.WriteLine("Drive: {0}", drive);
Console.WriteLine("OS: {0}", Environment.OSVersion);
Console.WriteLine("Number of processors: {0}",Environment.ProcessorCount);
Console.WriteLine(".NET Version: {0}",Environment.Version);
Console.WriteLine("User name: {0}", Environment.UserName);
Console.WriteLine("Domain name: {0}", Environment.UserDomainName);
Console.WriteLine("Machine name: {0}", Environment.MachineName);
Console.WriteLine("Current directory: {0}", Environment.CurrentDirectory);
}
}
}
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This example demonstrates how to print arguments that are passed to a program through a command line:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Program
{
class Program
{
static int Main(string[] args)
{
// Process any incoming args using 'for' keyword.
for (int i = 0; i < args.Length; i++)
Console.WriteLine("Arg: {0}", args[i]);
Console.ReadLine();
return -1;
}
}
}
Compile and run this program from the command line adding any arguments after exe file. For example running: ArgsTest.exe -arg1 -arg2 -arg2 will produce the following result:
The same as above but using ‘foreach’ keyword:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Program
{
class Program
{
static int Main(string[] args)
{
// Get arguments using System.Environment.
string[] theArgs = Environment.GetCommandLineArgs();
foreach (string arg in theArgs)
Console.WriteLine("Arg: {0}", arg);
Console.ReadLine();
return -1;
}
}
}
Another method using GetCommandLineArgs() method of the System.Environment type.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Program
{
class Program
{
static int Main(string[] args)
{
// Get arguments using System.Environment.
string[] theArgs = Environment.GetCommandLineArgs();
foreach (string arg in theArgs)
Console.WriteLine("Arg: {0}", arg);
Console.ReadLine();
return -1;
}
}
}
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The following T-SQL statements will print the logical name and physical location of system database files:
USE master;
GO
SELECT name, physical_name AS CurrentLocation, state_desc
FROM sys.master_files
WHERE database_id = DB_ID(N'master')
SELECT name, physical_name AS CurrentLocation, state_desc
FROM sys.master_files
WHERE database_id = DB_ID(N'tempdb')
SELECT name, physical_name AS CurrentLocation, state_desc
FROM sys.master_files
WHERE database_id = DB_ID(N'model')
SELECT name, physical_name AS CurrentLocation, state_desc
FROM sys.master_files
WHERE database_id = DB_ID(N'msdb')
Result:
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SQL SERVER 2008 DATABASE IMPLEMENTATION AND MAINTENANCE
MCTS EXAM: 70-432
===================================================================
Exam Objectives:
1) New Features in SQL Server 2008
2) Installing SQL Server 2008
3) Configuring SQL Server 2008
4) Managing Security
5) Managing Data Encryption
6) Managing High Availability
7) Maintaining Your Database
8 ) ETL Techniques
9) Managing Replication
10) Monitoring and Troubleshooting
11) SQL Server XML Support
12) Service Broker
13) Performance Tuning
14) Implementing Objects
====================================================================
Continue reading New Features in SQL Server 2008
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Author: Zaur Bahramov Description: This example demonstrate the quick and simple way to match correct IP address.
MatchesDemo.zip
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Windows.Forms;
namespace MatchesDemo
{
public partial class IPValidate : Form
{
public IPValidate()
{
InitializeComponent();
}
private void btnValidate_Click(object sender, EventArgs e)
{
// MessageBox.Show(mtxtIPAddress.Text);
// create a regex object
Regex checkIP = new Regex (@"\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b");
// create match
Match matchIP = checkIP.Match(mtxtIPAddress.Text);
if (checkIP.IsMatch(mtxtIPAddress.Text))
{
mtxtIPAddress.ForeColor = Color.Green;
}
else
mtxtIPAddress.ForeColor = Color.Red;
}
}
}
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Author: Zaur Bahramov
Description: This example demonstrates the usage of IsMatch() method in C#.NET
using System;
using System.Text.RegularExpressions;
namespace IsMatchDemo
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine(@"This will find a match for the regular expression'[A-Z]\d\d'.");
Console.WriteLine("Enter a test string now.");
// create regex to match any alphabetical character, followed by a digit
Regex myRegex = new Regex(@"[A-Z]\d\d", RegexOptions.IgnoreCase);
// create a string variable to store input from user
string inputString;
// read input
inputString = Console.ReadLine();
// create object variable Match as inheriting from Match class
Match myMatch = myRegex.Match(inputString);
string outputString = "The following option(s) are set: ";
// print selected regex option
Console.WriteLine(outputString + myRegex.Options.ToString());
// print string typed by user
Console.WriteLine("You entered the string: '" + inputString + "'.");
// check wether the match occured
if (myRegex.IsMatch(inputString))
Console.WriteLine("The match '" + myMatch.ToString() + "' was found in the string you entered.");
else
Console.WriteLine("No match was found.");
Console.ReadLine();
}
}
}
Output:
This will find a match for the regular expression’[A-Z]\d\d’.
Enter a test string now.
-”This is a test text: z75. Is this a match?”
The following option(s) are set: IgnoreCase
You entered the string: ‘This is a test text: z75. Is this a match?’.
The match ‘z75′ was found in the string you entered.
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POSIX
=======================================================
[:upper:] Upper case letters
[:lower:] Lower case letters
[:alpha:] All letters
[:alnum:] Digits and letters
[:digit:] Digits
[:xdigit:] Hexadecimal digits
[:punct:] Punctuation
[:blank:] Space and tab
[:space:] Blank characters
[:cntrl:] Control characters
[:graph:] Printed characters and spaces
[:word:] Digits, letters and underscore
--------------------------------------------------------
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Author: Microsoft
' ----------------------------------------
' Required Imports :
'
' System.Xml
' ----------------------------------------
For Each attribute As XmlAttribute In node.Attributes
Next
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Author: Microsoft
Adds a new element to an XML document instance.
' ----------------------------------------
' Required Imports :
'
' System.Xml
' ----------------------------------------
Dim newElement As XmlNode
newElement = xmlDoc.CreateElement("Keyword")
newElement.InnerText = "Value"
xmlDoc.AppendChild(newElement)
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In Microsoft Office Word you have to use Wild card to search with regular expressions.
These are not exactly the same as in other regex flavours.
To use regular expressions (wildcards) in Word 2003, simply select the Edit menu;
then select Find. Alternatively, you can use the equivalent keyboard shortcut Ctrl+F.
The Find and Replace dialog box opens. Check the use WildCards check box.
Metacharacter Description
============= ========================================================
? Nonstandard usage (in Word, it is not a quantifier).
Matches a single character. Broadly equivalent to
the dot metacharacter (.) in standard syntax.
* Nonstandard usage. Matches zero or more characters.
Broadly equivalent to .* in standard syntax.
< Matches the position between a nonalphabetic character
and a following alphabetic character. Effectively, a
beginning-of-word position metacharacter.
> Matches the position between an alphabetic character
and a following nonalphabetic character. Effectively,
an end-of-word position metacharacter.
[...] Character class delimiters.
! Used in character classes as the character class negation
metacharacter.
{n,m} Quantifier syntax.
@ Quantifier. Nonstandard syntax, to match one or more
occurrences of the preceding character or group. Equivalent
to the + metacharacter in standard syntax.
EXAMPLES
============================================================================================
Problem: Match dates in various country formats
Sample Text: 2005-12-25
12/11/2003
01.25.2006
03-18-2007
07-19-2004
2006/09/18
RegEx 1: ([0-9]{2})[./-]([0-9]{2})[./-]([0-9]{4})
Replacement 1: \3-\1-\2
Explanation: If all has gone well, the pattern should match the dates that are
in U.S. format but not those that are already in international date
format. We have assumed that all entries are valid dates. The
pattern shown would also match nonsense character sequences such as
44/12/5432.
--------------------------------------------------------------------------------------------
NOTE: Period character in Microsoft Word must be enclosed in square bracket, like this [.]
Sample: To create a capturing group containing a period, use: ([.])
EXAMPLE:
Sometimes you can omit a space character between period in the end of sentence and the new sentence.
In such cases you end up with something like this: "He goes to work.He takes a taxi."
To match lower-case alphabetic character, followed by period and followed by upper-case character
the following RegEx can be successfully applied: [a-z][.][A-Z]. If you need to make a replacement
you should use it within a capturing groups, like this: ([a-z][.])([A-Z])
Replacement string will be: \1 \2 (note the space between \1 and \2!)
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