How do I scroll 2 listview objects together?

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using System.Windows.Forms; namespace ListViewSharedScroll { class CustListView : ListView { public event ScrollEventHandler Scroll; private const int WM_HSCROLL = 0x114; private const int WM_VSCROLL = 0x115; protected virtual void OnScroll(ScrollEventArgs e) { ScrollEventHandler handler = this.Scroll; if (handler != null) handler(this, e); } protected override void WndProc(ref Message m) { base.WndProc(ref m); if (m.Msg == WM_VSCROLL) { // Trap WM_VSCROLL OnScroll(new ScrollEventArgs((ScrollEventType)(m.WParam.ToInt32() & 0xffff), -1, 0, ScrollOrientation.VerticalScroll)); } else if (m.Msg == WM_HSCROLL) { OnScroll(new ScrollEventArgs((ScrollEventType)(m.WParam.ToInt32() & 0xffff),-1,0,ScrollOrientation.HorizontalScroll)); } } } }

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using System; using System.Drawing; using System.Windows.Forms; using System.Runtime.InteropServices; namespace ListViewSharedScroll { public partial class Form1 : Form { public Form1() { InitializeComponent(); } [DllImport("user32.dll", CharSet = CharSet.Auto)] static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam); int TopItemIndex = 0; CustListView ListView1 = new CustListView(); CustListView ListView2 = new CustListView(); private void Form1_Load(object sender, EventArgs e) { ListView1.Size = new Size(201, 146); ListView1.Margin = new Padding(3, 3, 3, 3); ListView1.Location = new Point(48, 85); ListView1.Scrollable = true; ListView1.View = View.Details; ListView2.Size = new Size(201, 146); ListView2.Margin = new Padding(3, 3, 3, 3); ListView2.Location = new Point(280, 85); ListView2.Scrollable = true; ListView2.View = View.Details; ListView1.Columns.Add("Header", 100); ListView1.Columns.Add("Details", 100); ListView2.Columns.Add("Header", 100); ListView2.Columns.Add("Details", 100); for (int i = 0; i < 50; i++) { ListView1.Items.Add(new ListViewItem(new string[] { "Alpha"+i.ToString(), "Some details"+i.ToString() })); ListView1.Items.Add(new ListViewItem(new string[] { "Bravo" + i.ToString(), "More details" + i.ToString() })); ListView2.Items.Add(new ListViewItem(new string[] { "Alpha" + i.ToString(), "Some details" + i.ToString() })); ListView2.Items.Add(new ListViewItem(new string[] { "Bravo" + i.ToString(), "More details" + i.ToString() })); } ListView1.Scroll += ListView1_Scroll; ListView2.Scroll += ListView1_Scroll; this.Controls.Add(ListView1); this.Controls.Add(ListView2); } private void ListView1_Scroll(object sender, ScrollEventArgs e) { if (e.ScrollOrientation == ScrollOrientation.VerticalScroll) { if (TopItemIndex != ListView1.TopItem.Index || TopItemIndex != ListView2.TopItem.Index) { if (TopItemIndex != ListView1.TopItem.Index) { ListView1.EnsureVisible(ListView1.TopItem.Index); ListView2.EnsureVisible(ListView1.TopItem.Index); TopItemIndex = ListView1.TopItem.Index; } else { ListView1.EnsureVisible(ListView2.TopItem.Index); ListView2.EnsureVisible(ListView2.TopItem.Index); TopItemIndex = ListView2.TopItem.Index; } } } if (e.ScrollOrientation == ScrollOrientation.HorizontalScroll) { ScrollH(1); } } private void ScrollH(int pixelsToScroll) { const Int32 LVM_FIRST = 0x1000; const Int32 LVM_SCROLL = LVM_FIRST + 20; SendMessage(ListView1.Handle, LVM_SCROLL, (IntPtr)pixelsToScroll, IntPtr.Zero); SendMessage(ListView2.Handle, LVM_SCROLL, (IntPtr)pixelsToScroll, IntPtr.Zero); } } }

Refernced articles:
  http://stackoverflow.com/questions/1851620/handling-scroll-event-on-listview-in-c-sharp http://stackoverflow.com/questions/626315/winforms-listview-remembering-scrolled-location-on-reload
http://stackoverflow.com/questions/473148/c-sharp-listview-how-do-i-add-items-to-columns-2-3-and-4-etc
  http://stackoverflow.com/questions/7146567/winforms-listview-not-showing-items-in-detailsview http://stackoverflow.com/questions/372034/how-do-i-listen-for-scrolling-in-a-listview http://stackoverflow.com/questions/372034/how-do-i-listen-for-scrolling-in-a-listview http://bytes.com/topic/c-sharp/answers/255418-scrolling-listview

Integer Complemet of a Number or Once Complemet of a Integer

This was a program given to me in an interview unfortunately I was not able to complete it in very short time hence I am writing this code here so that this may help any one ;-)

C++ Source :

#include<iostream>

#include<conio.h>

#include<string>

using namespace std;

int GetIntegerComplement(int nInputNum)

{

int nRemider = 0, nCompRem = 0, nSum = 0, nCompSum=0, nTempNum;

int nPos=1;

string strComp="";

char ChArray[2];

size_t Size = 1;

nTempNum = nInputNum;

do

{

nRemider = nTempNum % 2;

if (nRemider == 0)

{

nCompRem = 1;

}

else

{

nCompRem = 0;

}

nSum = nSum + (nPos*nRemider);

nCompSum = nCompSum + (nPos*nCompRem);

_itoa(nCompRem,ChArray,10);

strComp = strComp + string(ChArray);

nTempNum = nTempNum / 2;

nPos = nPos * 10;

} while (nTempNum>0);

cout << "\n The Binary equivalent of " << nInputNum << " is " << nSum;

int nIntComp = 0;

nPos = 0;

nRemider = 0;

while (nCompSum > 0)

{

nRemider = nCompSum % 10;

nIntComp = nIntComp + pow(2,nPos)*nRemider;

nCompSum = nCompSum / 10;

nPos++;

}

reverse(strComp.begin(),strComp.end());

cout << "\n The complement Binary equivalent" << " is " << strComp;

return nIntComp;

}

void main()

{

int nNumber;

cout << "\n Enter a number to Convert to Binary";

cin >> nNumber;

cout << "\n The Integer complement of " << nNumber << " is " << GetIntegerComplement(nNumber);

_getch();

}

C# Source:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace DecimalOnceComplement

{

    class Program

    {

        static int GetIntegerComplement(int nInputNum)

        {

           int nRemider = 0, nCompRem = 0, nSum = 0, nCompSum=0, nTempNum;

           int nPos=1;

           string strComp="";

           nTempNum = nInputNum;

        do

           {

           nRemider = nTempNum % 2;

           if (nRemider == 0)

           {

           nCompRem = 1;

           }

           else

           {

           nCompRem = 0;

           }

               nSum = nSum + (nPos*nRemider);

               nCompSum = nCompSum + (nPos*nCompRem);

                        strComp = strComp + nCompRem.ToString();

               nTempNum = nTempNum / 2;

               nPos = nPos * 10;

          } while (nTempNum>0);

           Console.WriteLine(" The Binary equivalent of {0} is {1}",nInputNum,nSum);

           int nIntComp = 0;

           nPos = 0;

           nRemider = 0;

          while (nCompSum > 0)

          {

           nRemider = nCompSum % 10;

           nIntComp = nIntComp + (int)(Math.Pow(2,nPos))*nRemider;

           nCompSum = nCompSum / 10;

           nPos++;

       }

               strComp = ReverseString(strComp);

        Console.WriteLine( " The complement Binary equivalent is {0}",strComp);

       return nIntComp;

       

        }

        public static string ReverseString(string s)

        {

            char[] arr = s.ToCharArray();

            Array.Reverse(arr);

            return new string(arr);

        }

        static void Main(string[] args)

        {

            int nNumber;

            string strInput;

            Console.WriteLine(" Enter a number to Convert to Binary:");

            strInput = Console.ReadLine();

            nNumber = Convert.ToInt32(strInput);

            Console.WriteLine(" The Integer complement of {0} is {1}" ,nNumber,GetIntegerComplement(nNumber));

            Console.ReadLine();

        }

    }

}

Out Put :

Friend function in C++ vs internal function in C#

There is no friend function in C# instead you can achieve same functionality using internal keyword

C++ Source :

#include<iostream>
#include<conio.h>
#include<string>

using namespace std;

class access
{
// String Variable declared as internal
public:
void SetName(string Name);
friend void print(access objAcess);
private:
string name;


};

void access::SetName(string Name)
{
name = Name;
}

void print(access objAcess)
{
cout << "\nMy name is " << objAcess.name;
}

void main( )
{
access objAcess;
objAcess.SetName("Sreeyush");
print(objAcess);
 
_getch();

}


C# source :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace InternalKeywordEx
{
    class access
    {
        // String Variable declared as internal
        private string name;
        internal void print()
        {
            Console.WriteLine("\nMy name is " + name);
        }

        internal void SetName(string Name)
        {
            name = Name;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            access objAcess = new access();

            objAcess.SetName("Sreeyush");

            objAcess.print();

            Console.ReadLine();


        }
    }
}

static in C++ vs Static class in C#

There is no static class in c++ like in C# , instead we can declare static members and fuctions inside a class in c++

C++ Source :

#include<iostream>
#include<conio.h>
#include<string>

using namespace std;

class TemperatureConverter
{
public :
static double CelsiusToFahrenheit(std::string temperatureCelsius)
{
// Convert argument to double for calculations.
std::string::size_type sz;
double celsius = std::stod(temperatureCelsius, &sz);

// Convert Celsius to Fahrenheit.
double fahrenheit = (celsius * 9 / 5) + 32;

return fahrenheit;
}

static double FahrenheitToCelsius(std::string temperatureFahrenheit)
{
// Convert argument to double for calculations.
std::string::size_type sz;
double fahrenheit = std::stod(temperatureFahrenheit, &sz);

// Convert Fahrenheit to Celsius.
double celsius = (fahrenheit - 32) * 5 / 9;

return celsius;
}
};

void main()
{
cout<<"Please select the convertor direction\n";
cout << "1. From Celsius to Fahrenheit.\n";
cout << "2. From Fahrenheit to Celsius.\n";
cout << ":";

string selection;
int selectionType;
cin >> selection;
double F, C = 0;

if (selection.compare("1") == 0)
{
selectionType = 1;
}
else if (selection.compare("2") == 0)
{
selectionType = 2;
}
else
{
selectionType = 3;
}

std::string value;

switch (selectionType)
{

case 1:
cout<<"Please enter the Celsius temperature:";
cin >> value;
F = TemperatureConverter::CelsiusToFahrenheit(value);
printf("Temperature in Fahrenheit:%0.2f",F);
break;

case 2:
cout << "Please enter the Fahrenheit temperature:";
cin >> value;
C = TemperatureConverter::FahrenheitToCelsius(value);
printf("Temperature in Celsius:%0.2f", C);
break;

default:
cout << "Please select a convertor.";
break;
}

// Keep the console window open in debug mode.
cout <<"\nPress any key to exit.";
_getch();
}



C# source :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace StaticClassSln
{

    public static class TemperatureConverter
    {
        public static double CelsiusToFahrenheit(string temperatureCelsius)
        {
            // Convert argument to double for calculations.
            double celsius = Double.Parse(temperatureCelsius);

            // Convert Celsius to Fahrenheit.
            double fahrenheit = (celsius * 9 / 5) + 32;

            return fahrenheit;
        }

        public static double FahrenheitToCelsius(string temperatureFahrenheit)
        {
            // Convert argument to double for calculations.
            double fahrenheit = Double.Parse(temperatureFahrenheit);

            // Convert Fahrenheit to Celsius.
            double celsius = (fahrenheit - 32) * 5 / 9;

            return celsius;
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Please select the convertor direction");
            Console.WriteLine("1. From Celsius to Fahrenheit.");
            Console.WriteLine("2. From Fahrenheit to Celsius.");
            Console.Write(":");

            string selection = Console.ReadLine();
            double F, C = 0;

            switch (selection)
            {
                case "1":
                    Console.Write("Please enter the Celsius temperature: ");
                    F = TemperatureConverter.CelsiusToFahrenheit(Console.ReadLine());
                    Console.WriteLine("Temperature in Fahrenheit: {0:F2}", F);
                    break;

                case "2":
                    Console.Write("Please enter the Fahrenheit temperature: ");
                    C = TemperatureConverter.FahrenheitToCelsius(Console.ReadLine());
                    Console.WriteLine("Temperature in Celsius: {0:F2}", C);
                    break;

                default:
                    Console.WriteLine("Please select a convertor.");
                    break;
            }

            // Keep the console window open in debug mode.
            Console.WriteLine("Press any key to exit.");
            Console.ReadKey();
        }
    }
}

C++ list vs C# list

C++ Source code :

#include<iostream>
#include<conio.h>
#include<list>

using namespace std;


void main()
{

list<int> mylist;

mylist.push_back(1);
mylist.push_back(2);
mylist.push_back(3);

list<int>::iterator itrlst;

for (itrlst = mylist.begin(); itrlst != mylist.end(); itrlst++)
{
cout << *itrlst << "Element" << *itrlst<<"\n";
}


_getch();

}

output :

1 Element 1
2 Element 2
3 Element 3

C# souce code :

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Project2

{

    

    public class Class1

    {

       

        static void Main()

        {

            

            var mylist = new List<int>();

            mylist.Add(1);

            mylist.Add(2);

            mylist.Add(3);

            foreach(int element in mylist)

            {

                Console.WriteLine("{0} Element:{0}", element, element);

               

            }

            Console.ReadLine();

            return;

        }

    }

}

output :

1 Element 1

2 Element 2

3 Element 3

virtual function of base called from derived class

#include<iostream>
#include<conio.h>


using namespace std;

class Area
{
public:
virtual double GetArea(int length, int breadth)
{
return length * breadth;
}
};

class Rectangle : Area
{
public:
double  GetArea(int length, int breadth)
{
return Area::GetArea(length, breadth);
}
};

class Triangle : Area
{

public:
double GetArea(int length, int breadth)
{
return 0.5 * Area::GetArea(length, breadth);
}
};

void main()
{
Rectangle oRectangle;
Triangle oTriangle;

cout<<"\nArea of Rectangle:"<< oRectangle.GetArea(10, 2);
cout << "\nArea of Triangle:"<<oTriangle.GetArea(10, 2);

_getch();

}

Out Put :
Area of Rectangle: 20
Area of Triangle:10

C# source code :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Project2
{
    public abstract class Area
    {
        public virtual double GetArea(int nlenght, int nbreadth)
        {
            return nlenght * nbreadth;
        }
    }

    public class Rectangle : Area
    {
        public override double GetArea(int nlength, int nbreadth)
        {
            return base.GetArea(nlength, nbreadth);
        }
    }

    public class Triangle : Area
    {
        public override double GetArea(int nlength, int nbreadth)
        {
            return 0.5 * base.GetArea(nlength, nbreadth);
        }
    }
    public class Class1
    {
     
        static void Main()
        {
            Rectangle oRectangle = new Rectangle();
            Triangle oTriangle = new Triangle();

            Console.WriteLine("Area of Rectangle:{0}",oRectangle.GetArea(10, 2));
            Console.WriteLine("Area of Triangle:{0}",oTriangle.GetArea(10, 2));

            Console.ReadLine();

            return;
        }
    }
}


Out Put :
Area of Rectangle: 20
Area of Triangle:10

Pure virtual function in C++ vs abstract method in C#

C++ Source code :

#include<iostream>
#include<conio.h>


using namespace std;

class Area
{
public:
virtual double GetArea(int length,int breadth) = 0;
};

class Rectangle : Area
{
public:
double  GetArea(int length, int breadth)
{
return length * breadth;
}
};

class Triangle : Area
{

public:
double GetArea(int length, int breadth)
{
return 0.5 * length * breadth;
}
};

void main()
{
Rectangle oRectangle;
Triangle oTriangle;

cout<<"\nArea of Rectangle:"<< oRectangle.GetArea(10, 2);
cout << "\nArea of Triangle:"<<oTriangle.GetArea(10, 2);

_getch();

}

Out Put :
Area of Rectangle: 20
Area of Triangle:10

C# source code :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Project2
{
    public abstract class Area
    {
        public abstract double GetArea(int nlenght, int nbreadth);
    }

    public class Rectangle : Area
    {
        public override double GetArea(int nlength, int nbreadth)
        {
            return nlength * nbreadth;
        }
    }

    public class Triangle : Area
    {
        public override double GetArea(int nlength, int nbreadth)
        {
            return 0.5 * nlength * nbreadth;
        }
    }
    public class Class1
    {
     
        static void Main()
        {
            Rectangle oRectangle = new Rectangle();
            Triangle oTriangle = new Triangle();

            Console.WriteLine("Area of Rectangle:{0}",oRectangle.GetArea(10, 2));
            Console.WriteLine("Area of Triangle:{0}",oTriangle.GetArea(10, 2));

            Console.ReadLine();

            return;
        }
    }
}

Out Put :
Area of Rectangle: 20
Area of Triangle:10