String Format for Int [C#]

Integer numbers can be formatted in .NET in many ways. You can use static method String.Format or instance method int.ToString. Following examples show how to align numbers (with spaces or zeroes), how to format negative numbers or how to do custom formatting like phone numbers.

Add zeroes before number

To add zeroes before a number, use colon separator „:“ and write as many zeroes as you want.

[C#]
String.Format("{0:00000}", 15); // "00015" String.Format("{0:00000}", -15); // "-00015"

Align number to the right or left

To align number to the right, use comma „,“ followed by a number of characters. This alignment option must be before the colon separator.

[C#]
String.Format("{0,5}", 15); // " 15" String.Format("{0,-5}", 15); // "15 " String.Format("{0,5:000}", 15); // " 015" String.Format("{0,-5:000}", 15); // "015 "

Different formatting for negative numbers and zero

You can have special format for negative numbers and zero. Use semicolon separator „;“ to separate formatting to two or three sections. The second section is format for negative numbers, the third section is for zero.

[C#]
String.Format("{0:#;minus #}", 15); // "15" String.Format("{0:#;minus #}", -15); // "minus 15" String.Format("{0:#;minus #;zero}", 0); // "zero"

Custom number formatting (e.g. phone number)

Numbers can be formatted also to any custom format, e.g. like phone numbers or serial numbers.

[C#]
String.Format("{0:+### ### ### ###}", 447900123456); // "+447 900 123 456" String.Format("{0:##-####-####}", 8958712551); // "89-5871-2551"

출처 : www.csharp-examples.net/string-format-int/

Audio Wave Form Renderer

Test Harness App

https://markheath.net/post/naudio-png-waveform-rendering

C# Panel DirectShow Video ScrollBar

        public System.Windows.Forms.Panel pnlVideo;

        public QuartzTypeLib.FilgraphManager m_objFilterGraph = null;

        public QuartzTypeLib.IBasicAudio m_objBasicAudio = null;

        public QuartzTypeLib.IVideoWindow m_objVideoWindow = null;

        public QuartzTypeLib.IMediaEvent m_objMediaEvent = null;

        public QuartzTypeLib.IMediaEventEx m_objMediaEventEx = null;

        public QuartzTypeLib.IMediaPosition m_objMediaPosition = null;

        public QuartzTypeLib.IMediaControl m_objMediaControl = null;

         m_objVideoWindow.SetWindowPosition(pnlVideo.ClientRectangle.Left,

                        pnlVideo.ClientRectangle.Top,

                        pnlVideo.ClientRectangle.Height * (int)videoResolutionRate,

                        pnlVideo.ClientRectangle.Height);

m_objVideoWindow shows the video at original rate

1. ScrollBar Padding 20px

                    m_objVideoWindow.SetWindowPosition(pnlVideo.ClientRectangle.Left,

                        pnlVideo.ClientRectangle.Top,

                        (pnlVideo.ClientRectangle.Height - 20) * (int)videoResolutionRate,

                        pnlVideo.ClientRectangle.Height - 20);

2. Size and Scroll Bar Enable

                pnlVideo.HorizontalScroll.Visible = true;

                pnlVideo.AutoScroll = true;

                pnlVideo.MaximumSize = new Size(this.ClientSize.Width, this.ClientSize.Height - 80);

                pnlVideo.AutoScrollMinSize = new Size((int)UserControl1.videoResolutionRate * (this.ClientSize.Height - 80), this.ClientSize.Height - 80);

                pnlVideo.ClientSize = new Size(this.ClientSize.Width, this.ClientSize.Height - 80);

                pnlVideo.Size = new Size(this.ClientSize.Width, this.ClientSize.Height - 80);

C# 에서 C++ DLL 불러서 쓰기 #4

4. 멤버 함수 가져오기

C++

#ifdef BOX_EXPORTS

#define BOX_API __declspec(dllexport)

#else

#define BOX_API __declspec(dllimport)

#endif

Class BOX_API Box{

public:

Box();

int setInt(int a);

void setString(char* str);

}

int setInt(int a);

void setString(char* str);

이 멤버 함수들을 가져와서 사용하고 싶다.

참고 : http://tansanc.tistory.com/526?category=772232 [TanSanC]

아래와 같이 사용하고 싶지만

불가능하다

namespace BoxConsoleApplication

{

    class Program

    {

        [DllImport("Box.dll", CallingConvention = CallingConvention.Cdecl)]

        static public extern IntPtr CreateCBox();

        [DllImport("Box.dll", CallingConvention = CallingConvention.Cdecl)]

        static public extern void DisposeCBox(IntPtr pTestClassObject);

        unsafe static void Main(string[] args)

        {

            IntPtr pCBoxClass = CreateCBox(); ;

            pCBoxClass.setInt(3);

            pCBoxClass.setString("HelloWorld");

            DisposeCBox(pCBoxClass );            

            pCBoxClass = IntPtr.Zero; 

        }

    }

}

            pCBoxClass.setInt(3);

            pCBoxClass.setString("HelloWorld");

클래스 내부 멤버 변수라 바로 가져올 수는 없다.

사용 할 수 있는 방법은

클래스 생성시와 같이

extern 으로 접근가능 하도록 만들어 주어야 한다.

기본 형태

C++

.h

extern "C" BOX_API int setInt(CBox* pObject, int a);

.cpp

extern "C" BOX_API int setInt(CBox* pObject, int a)

{

if (pObject != NULL)

{

pObject->setInt(a);

}

return -1;

}

이렇게 C++ DLL 내부에서 

클래스 객체에 접근하여

객체의 멤버 함수를 호출하여 준다.

void setString(char* str);

C# 에서 C++ DLL 불러서 쓰기

http://freeprog.tistory.com/220

https://docs.microsoft.com/ko-kr/dotnet/csharp/language-reference/keywords/unsafe

http://heroeskdw.tistory.com/entry/C-MFC-DLL%EC%9D%84-C%EC%97%90%EC%84%9C-%EB%A1%9C%EB%94%A9%ED%95%98%EA%B8%B0

https://www.codeproject.com/Articles/18032/How-to-Marshal-a-C-Class

http://www.sysnet.pe.kr/2/0/11132

http://www.sysnet.pe.kr/2/0/11111

https://msdn.microsoft.com/ko-kr/library/62688esh.aspx

https://social.msdn.microsoft.com/Forums/en-US/b85fc9dd-acc5-42dc-a28e-b70953bf1170/unhandled-exception-systemruntimeinteropservicessehexception-additional-information-external?forum=vcgeneral

https://msdn.microsoft.com/ko-kr/library/system.io.filestream.read(v=vs.110).aspx

http://storycompiler.tistory.com/214

C# 에서 C++ DLL 불러서 쓰기 #2

2. DLL 참조하기

C++ DLL 을 C# 에서 사용하려면

일단 참조를 하여야 한다.

참조를 하는 방법은

Visual Studio 2013 버전에서는

[솔루션 탐색기] -> [솔루션] 하위 -> [프로젝트] 하위 -> [참조] -> 우클릭 -> [참조 추가] -> 우측 하단 [찾아보기(B)...] -> 원하는 DLL 찾아서 선택

선택을 하면 [참조] 하단에 참조된 DLL 이 보이게 된다.

여기서.......

이 글은

참조된 DLL 을 더블클릭하여 [개체 브라우저]로 보았을때도

하위 멤버들이 보이지 않는

C++ DLL 일 경우 해결하는 방법들을

순서...에 상관없이

메모해 두려고 한다.

using System.Diagnostics;

Stopwatch sw = new Stopwatch();

sw.Start();

// TODO

sw.Stop();

MessageBox.Show(sw.ElapsedMilliseconds.ToString() + "ms");

MessageBox.Show(sw.Elapsed.Hour.ToString() + "Minute");

MessageBox.Show(sw.Elapsed.Minute.ToString() + "Minute");

MessageBox.Show(sw.Elapsed.Second.ToString() + "Minute");

Get Audio Device List

using System.Management;


        public void getAudioDevice()
        {
            ManagementObjectSearcher objSearcher = new ManagementObjectSearcher("SELECT * FROM Win32_SoundDevice");

            ManagementObjectCollection objCollection = objSearcher.Get();

            foreach (ManagementObject obj in objCollection)
            {
                String str = "";
                foreach (PropertyData property in obj.Properties)
                {
                    str += String.Format("{0}:{1}\n", property.Name, property.Value);
                }
                Console.Out.WriteLine(str + "\n\n");
            }
        }

참조 : https://stackoverflow.com/questions/1525320/how-to-enumerate-audio-out-devices-in-c-sharp