Running Batch Script from C#

Here is another example code to run batch script from C#


public void RunBatchScript(string batchPath, string arguments)
{
Process process = new Process();
process.StartInfo.FileName = batchPath;
process.StartInfo.Arguments = arguments;

process.StartInfo.UseShellExecute = false;
process.StartInfo.CreateNoWindow = true;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.RedirectStandardOutput = true;


process.OutputDataReceived += new DataReceivedEventHandler(writeStdOutStreamInfo);
process.ErrorDataReceived += new DataReceivedEventHandler(writeStdErrStreamInfo);

process.Start();

process.BeginErrorReadLine();
process.BeginOutputReadLine();

// Wait for the process to end
while (!process.HasExited)
{
Thread.Sleep(500); // sleep
}
Console.ReadKey();
}
public void writeStdOutStreamInfo(object sender,DataReceivedEventArgs e)
{
string s = e.Data;
Console.WriteLine(s);
}
public void writeStdErrStreamInfo(object sender, DataReceivedEventArgs e)
{
string s = e.Data;
Console.WriteLine(s);
}

Using there event handlers we will get the standardoutput and standarderror asynchronously in the command prompt

LinQ to XML

Using LinQ to XML its very easy to query the Xml files and traverse through the nodes and elements.
Here is one simple exaple to read the configuration XML file

bellow is my simple XML configuration file



CPADCE008
CPADCE008VM1
CPADCE044
CPADCE044VM4
20100504



Then here is the simple class to load the XML file

class ConfigElements
{
public string ServerMain { get; set; }
public string ServerVM { get; set; }
public string ClientMain { get; set; }
public string ClientVM { get; set; }
public string LatestBuild { get; set; }

public ConfigElements(XElement xElement)
{
ServerMain = xElement.Element("ServerMain").Value;
ServerVM = xElement.Element("ServerVM").Value;
ClientMain = xElement.Element("ClientMain").Value;
ClientVM = xElement.Element("ClientVM").Value;
LatestBuild = xElement.Element("LatestBuild").Value;
}

public ConfigElements(string ID)
{
XDocument doc = XDocument.Load("XMLFile2.xml");

var query = from xElem in doc.Descendants("Automation")
where xElem.Attribute("ID").Value ==ID
select new ConfigElements(xElem);

}
}

By creating the object of this class we will get all the reqired nodes

ConfigElements objConfigElements = new ConfigElements("1");
//pass here the Id of the requied values
string s= objConfigElements.ServerMain;
string t = objConfigElements.ServerVM;
string u = objConfigElements.ClientMain;
string v = objConfigElements.ClientVM;
string w = objConfigElements.LatestBuild;

Lamda Expression usage in LinQ

int[] marks = { 10, 20, 30, 40, 50, 60, 70, 80, 90, 95, 100 };


int firstClassCount = marks.Where(n => n > 60).Count();

int[] distMarks = marks.Where(n => n > 80).ToArray();

Response.Write("Total first classes : "+firstClassCount.ToString() + "</br>");

foreach (int mark in distMarks)

{

Response.Write("Above Distinction : " + mark.ToString() + "</br>");

}

Lambda Expressions C# 3.0 & Anonymous Methods

Lambda expressions provide a concise syntax for writing anonymous
methods. The C# 3.0 specification describes lambda expressions as a
super set of anonymous methods.


In C# 2.0, you can write a delegate using an anonymous method, as
shown in this example:

public delegate int MyDelegate(int n);

class MyClass
{
    static void Main()
    {
        // Anonymous method that returns the argument multiplied by 5:
        MyDelegate delegObject1 = new MyDelegate(
        delegate(int n) { return n * 5; }
        );
        // Display the result:
        Console.WriteLine("The value is: {0}", delegObject1(5));
    }
}

This program outputs the value 25.

Using a lambda expression you can use a simpler syntax to achieve the
same goal:

MyDelegate delegObject2 = (int n) => n * 5;

using System;
using System.Collections.Generic;
using System.Text;
using System.Query;
using System.Xml.XLinq;
using System.Data.DLinq;

namespace Lambda
{
    public delegate int MyDelegate(int n);
    class MyClass
    {
        static void Main()
        {
            MyDelegate delegObject1 = new MyDelegate(
            delegate(int n) { return n * 5; }
            );

            Console.WriteLine("The value using an anonymous method is: {0}",
            delegObject1(5));

            MyDelegate delegObject2 = (int n) => n * 5;
            
            Console.WriteLine("The value using a lambda expression is: {0}",
            delegObject2(5));

            Console.ReadLine();
        }
    }
}

Output:
The value using an anonymous method is: 25
The value using a lambda expression is: 25


A lambda expression can use two arguments, especially when you are
using the Standard Query Operators. Let us start by declaring the following
delegate that uses two arguments:

public delegate int MyDelegate(int m, int n);

You can instantiate the delegate by using a lambda expression like this:

MyDelegate myDelegate = (x, y) => x * y;

You can then invoke the delegate and display the result as follows:

Console.WriteLine("The product is: {0}", myDelegate(5, 4));
// output: 20

Different types of Object Initializers

Consider the bellow Point class

 class Point
    {
        int x, y;
        public int X
        {
            get { return x; }
            set { x = value; }
        }
        public int Y
        {
            get { return y; }
            set { y = value; }
        }
    }


Then consider the main Program

class Program
    {
        static void Main(string[] args)
        {
            Point c1=new Point();
            c1.X=10;
            c1.Y=100;
            Console.WriteLine(c1.X);
            Console.WriteLine(c1.Y);

            Point c2=new Point {X=20,Y=200};    // See the new type of Initializing

            Console.WriteLine(c2.X);
            Console.WriteLine(c2.Y);

            var p = new Point { X = 30, Y = 300 };    // See the new type of Initializing using "var" keyword

            Console.WriteLine(p.X);
            Console.WriteLine(p.Y);

            Console.ReadLine();
        }
    }

With complex fields, such as a square or a rectangle whose corners are
located at the points p1 and p2, you can create the Rectangle class as
follows:

    public class Rectangle
    {
        Point p1; Point p2;
        public Point ULcorner { get { return p1; } set { p1 = value; } }
        public Point LRcorner { get { return p2; } set { p2 = value; } }      
    }
You can create and initialize the Rectangle object like this:

         var rectangle = new Rectangle
        {
            ULcorner = new Point { X = 0, Y = 0 },
            LRcorner = new Point { X = 10, Y = 20 }
        };

Note that the semicolon at the end of the object initializer block.