C#.NET - Check whether file closed

if (!IsFileClosed(sLocalCurrentDocumentPath))

{

MessageBox.Show("Document opened already..!", clsCommon.sProjectName, MessageBoxButtons.OK, MessageBoxIcon.Information);

return;

}

public static bool IsFileClosed(string filename)

{

try

{

using (var inputStream = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.None))

{

                    return true;

            }

}

catch (IOException)

{

return false;

      }

}

C#.NET - Accessing Share folder files with Network Authentication

Purpose :

Accessing Share folder files with Network Authentication

Step 1 : Create a class named SoddingNetworkAuth

Class Name : SoddingNetworkAuth.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.ComponentModel;

using System.Runtime.InteropServices;

using System.Security.Principal;

public class NetworkAuth : IDisposable

{

    [DllImport("advapi32.dll", SetLastError = true)]

    private static extern bool LogonUser(string lpszUsername, string lpszDomain, string lpszPassword, int dwLogonType, int dwLogonProvider, out IntPtr phToken);

    [DllImport("kernel32", SetLastError = true)]

    private static extern bool CloseHandle(IntPtr hObject);

    private IntPtr userHandle = IntPtr.Zero;

    private WindowsImpersonationContext impersonationContext;

    public NetworkAuth(string user, string domain, string password)

    {

        try

        {

            if (!string.IsNullOrEmpty(user))

            {

                // Call LogonUser to get a token for the user 

                bool loggedOn = LogonUser(user, domain, password,

                 9 /*(int)LogonType.LOGON32_LOGON_NEW_CREDENTIALS*/,

                 3 /*(int)LogonProvider.LOGON32_PROVIDER_WINNT50*/,

                out userHandle);

                if (!loggedOn)

                    throw new Win32Exception(Marshal.GetLastWin32Error());

                // Begin impersonating the user 

                impersonationContext = WindowsIdentity.Impersonate(userHandle);

            }

        }

        catch (Exception ex)

        {

            ExceptionHandler.HandleException(ex.ToString());

        }

    }

    public void Dispose()

    {

        try

        {

            if (userHandle != IntPtr.Zero)

                CloseHandle(userHandle);

            if (impersonationContext != null)

                impersonationContext.Undo();

        }

        catch (Exception ex)

        {

            ExceptionHandler.HandleException(ex.ToString());

        }

    }

}

Step 2 : Place it anywhere inside the form and use this below code to copy file

#region "File copying with NetworkAuth "

using (new NetworkAuth("sShareFolder_Username","sShareFolderName", "sShareFolder_Password"))

{

      try

            {

                /* This is for checking voice file details */

                if (!File.Exists("GiveFilePath"))

                {

                    File.Copy("SourcePath", "DestinationPath", true);

                }

            }

            catch (Exception ex)

            {

            }

}   

C#.NET - Calculation user idle time using windows application

Controls Needed :

BackgroundWorker

Explanation :

This is to help you to calculate user idle time using windows application. When user idle for some it will start calculating their idle time , when user again user their system it will end idle time.

Code :

#region "Idle Time"

// This is to specify minutes to calculate idle time. Suppose if you want to calculate for above 10 minutes of user idle time .

private int iTimePeriod = 10;

bool bCalculateIdleTime = false;

DateTime dtIdleStartTime = DateTime.Now;

       

// Unmanaged function from user32.dll

 [DllImport("user32.dll")]

static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);

// Struct we'll need to pass to the function

internal struct LASTINPUTINFO

{

public uint cbSize;

public uint dwTime;

}

#endregion "Idle Time"

private void bgWorkerIdleUser_DoWork(object sender, DoWorkEventArgs e)

        {

            try

            {

                while (true)

                {

                    // Get the system uptime

                    int systemUptime = Environment.TickCount;

                    // The tick at which the last input was recorded

                    int LastInputTicks = 0;

                    // The number of ticks that passed since last input

                    int IdleTicks = 0;

                    // Set the struct

                    LASTINPUTINFO LastInputInfo = new LASTINPUTINFO();

                    LastInputInfo.cbSize = (uint)Marshal.SizeOf(LastInputInfo);

                    LastInputInfo.dwTime = 0;

                    // If we have a value from the function

                    if (GetLastInputInfo(ref LastInputInfo))

                    {

                        // Get the number of ticks at the point when the last activity was seen

                        LastInputTicks = (int)LastInputInfo.dwTime;

                        // Number of idle ticks = system uptime ticks - number of ticks at last input

                        IdleTicks = systemUptime - LastInputTicks;

                    }

                    TimeSpan t = TimeSpan.FromSeconds(IdleTicks / 1000);

                    if (t.Hours == 0 && t.Minutes == 0 && t.Seconds == 0)

                    {

                       

                        int iTotalSeconds = (int)Math.Round((DateTime.Now - dtIdleStartTime).TotalSeconds);

                        if (iTotalSeconds >= (iTimePeriod * 60) && iTotalSeconds > 0)

                        {

                            IPAddress ip = Dns.GetHostAddresses(Dns.GetHostName()).Where(address => address.AddressFamily == AddressFamily.InterNetwork).First();

                           

                        }

                       

                        bCalculateIdleTime = false;

                    }

                    else if (t.Seconds > 0)

                    {

                        if (!bCalculateIdleTime)

                        {

                            bCalculateIdleTime = true;

                            dtIdleStartTime = DateTime.Now;

                        }

                    }

                    System.Threading.Thread.Sleep(100);

                }

            }

            catch (Exception ex)

            {

                ExceptionHandler.HandleException(ex.ToString());

            }

        }

C#.Net - Displaying Sno in DataGridView

private void dGvCapacity_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)

        {

            try

            {

                string strRowNumber = (e.RowIndex + 1).ToString();

                SizeF size = e.Graphics.MeasureString(strRowNumber, this.Font);

                if (dGvCapacity.RowHeadersWidth < (int)(size.Width + 20))

                {

                    dGvCapacity.RowHeadersWidth = (int)(size.Width + 20);

                }

                Brush b = SystemBrushes.ControlText;

                e.Graphics.DrawString(strRowNumber, this.Font, b, e.RowBounds.Location.X + 15, e.RowBounds.Location.Y + ((e.RowBounds.Height - size.Height) / 2));

            }

            catch (Exception ex)

            {

            }

        }

C#.NET - Load Month names and Year in Combo Box

private delegate void del_LoadMonth();

private delegate void del_LoadYear();

private void LoadMonth()

{

if (cboMonth.InvokeRequired)

cboMonth.Invoke(new del_ LoadMonth(LoadMonth),null);

            else

            {

                for (int i = 0; i < 12; i++)

                {

                    cboMonth.Items.Insert(i, CultureInfo.CurrentUICulture.DateTimeFormat.MonthNames[i]);

                }

                cboMonth.SelectedIndex = DateTime.Now.Month - 1;

            }

}

private void LoadYear()

{

            try

            {

                if (cboYear.InvokeRequired)

                    cboYear.Invoke(new del_ LoadYear(LoadYear), null);

                else

                {

                    int iCurrentYear = DateTime.Now.Year;

                    for (int i = 2014; i <= iCurrentYear; i++)

                    {

                        cboYear.Items.Add(i.ToString());

                    }

                    cboYear.SelectedIndex = (cboYear.Items.Count - 1);

                }

            }

            catch (Exception ex)

            {

            }

}

C#.NET - Get first day and Last day of Month

  public DateTime FirstDayOfMonthFromDateTime(DateTime dateTime)

        {

            return new DateTime(dateTime.Year, dateTime.Month, 1);

        }

        public DateTime LastDayOfMonthFromDateTime(DateTime dateTime)

        {

            DateTime firstDayOfTheMonth = new DateTime(dateTime.Year, dateTime.Month, 1);

            return firstDayOfTheMonth.AddMonths(1).AddDays(-1);

        }

C#.NET - Adding "SELECT" in Combo box

private void LoadCommentType()

        {

            try

            {

                DataTable dtCommentType = clsCommon.oAdmin.dtGetCommentType();

                if (dtCommentType != null)

                {

                    DataRow dr = dtCommentType.NewRow();

                    dr["CommentTypeId"] = 0;

                    dr["CommentTypeName"] = "--Select--";

                    dtCommentType.Rows.InsertAt(dr, 0);

                    cboComment.DisplayMember = "CommentTypeName";

                    cboComment.ValueMember = "CommentTypeId";

                    cboComment.DataSource = dtCommentType.DefaultView;

                }

            }

            catch (Exception ex)

            {

                ExceptionHandler.HandleException(ex.ToString());

            }

        }