1001 نکته در سی شارپ

[sinpin]

How to record voice from microphone?

using Microsoft.VisualBasic.Devices;

using Microsoft.VisualBasic;

using System.Runtime.InteropServices;

تابع API زير را به كلاس برنامه بيافزاييد :

[DllImport("winmm.dll", EntryPoint = "mciSendStringA", 

CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]



private static extern int mciSendString(string lpstrCommand, 

string lpstrReturnString, int uReturnLength, int hwndCallback);

3 دكمه با نامهاي زير بسازيد :

• Record
• SaveStop
• Read

در زمان كليك شدن دكمه Record بنويسيد :

// record from microphone

mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);

mciSendString("record recsound", "", 0, 0);

و هنگام كليك شدن دكمه SaveStop

// stop and save

mciSendString("save recsound c:\\record.wav", "", 0, 0);

mciSendString("close recsound ", "", 0, 0);

Computer c = new Computer();

c.Audio.Stop();

و براي دكمه Read نيز :

Computer computer = new Computer();

computer.Audio.Play("c:\\record.wav", AudioPlayMode.Background);

منبع : http://www.dotnetspider.com/resource...icrophone.aspx

[sinpin]

Get a list of installed software in C#‎

private string Getinstalledsoftware()

{

    string Software = null;



    string SoftwareKey = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninst  all";

    using (RegistryKey rk = Registry.LocalMachine.OpenSubKey(SoftwareKey))

    {

        foreach (string skName in rk.GetSubKeyNames())

        {

            using (RegistryKey sk = rk.OpenSubKey(skName))

            {

                try

                {

                    if (!(sk.GetValue("DisplayName") == null))

                    {

                        if (sk.GetValue("InstallLocation") == null)

                            Software += sk.GetValue("DisplayName") + " - Install path not known\n"; //Nope, not here.

                        else

                            Software += sk.GetValue("DisplayName") + " - " + sk.GetValue("InstallLocation") + "\n"; //Yes, here it is...

                    }

                }

                catch (Exception ex)

                {

                    //No, that exception is not getting away... :P

                }

            }

        }

    }

    return Software;

}

منبع : http://www.dreamincode.net/code/snippet1995.htm

[sinpin]

Check for internet connection in C#‎

public bool isConnectionAvailable()

{

    //build a list of sites to ping, you can use your own

    string[] sitesList = { "www.google.com", "www.microsoft.com" , "www.psychocoder.net" };

    Ping ping = new Ping();

    PingReply reply;

    bool _success = false;

    int notReturned = 0;

     try

        {

            for (int i = 0; i <= sitesList.Length; i++)

            {

                reply = ping.Send(sitesList[i], 10);

                if (reply.Status != IPStatus.Success)

                {

                    notReturned += 1;

                }

                if (notReturned == sitesList.Length)

                {

                    _success = false;

                    throw new Exception(@"There doest seem to be a network/internet connection.\r\n 

                    Please contact your system administrator");

                }

                else

                {

                    _success = true;

                }

            } 

    }



    catch 

    {

        _success = false;

    }

    return _success;

}

منبع : http://www.dreamincode.net/code/snippet1568.htm

[sinpin]

Get current DataRow from a DataGridView instance.

public DataRow GetCurrentRow(DataGridView dgv)

{

    DataRowView drv = null;

    try

    {

        if (dgv.CurrentRow == null) { return null; }

        if (dgv.CurrentRow.DataBoundItem == null) { return null; }

        drv = (DataRowView)dgv.CurrentRow.DataBoundItem;

    }

    catch

    {

        return null;

    }

    return drv.Row;

}

منبع : http://www.dreamincode.net/code/snippet1435.htm

[sinpin]

representation of the amount of time the computer has been on since the OS started.

public string getUptime()

{

    String strResult = String.Empty;

    strResult += Convert.ToString(Environment.TickCount / 86400000) + " days, ";

    strResult += Convert.ToString(Environment.TickCount / 3600000 % 24) + " hours, ";

    strResult += Convert.ToString(Environment.TickCount / 120000 % 60) + " minutes, ";

    strResult += Convert.ToString(Environment.TickCount / 1000 % 60) + " seconds.";

    return strResult;

}

منبع : http://www.dreamincode.net/code/snippet1555.htm