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 if (s7Client.Connected)
{					

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 private void TimerCopyAllFiles_Tick(object sender, EventArgs e)
{
 S7VariablenResult s7VariablenResult = ReadResult();

 if (s7Client.Connected)
 {
   CPUIsConnected();
 }
 else
 {
   btnConnectToSPS.Enabled = true;
 }

   ShowS7VariablenStatus(s7VariablenResult);
   ShowPlcStatus();

if (BW_CopyAllFiles.IsBusy != true)
{
if (s7VariablenResult.TrigSaveFiles && (s7VariablenResult.TypLinks || s7VariablenResult.TypRechts) && !s7VariablenResult.FMBauteil)
{
  TimerCopyAllFiles.Enabled = false;
  BW_CopyAllFiles.RunWorkerAsync();
}
}
}					

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 private void CPUIsConnected()
{
  byte[] buffersize = new byte[1];

  S7.SetBitAt(ref buffersize, 0, uivalues.ConnectToPLCBit, true);

  s7Client.DBWrite(uivalues.DBNr, uivalues.ConnectToPLCByte, buffersize.Length, buffersize);
}					

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 private void Configuration_Click(object sender, EventArgs e)
{
  this.Hide();
  ConfigurationForm configurationForm = new ConfigurationForm();
  configurationForm.ShowDialog();
  if (configurationForm.DialogResult == DialogResult.OK)
  {
     configurationForm.Close();
  }

     this.Show();
}					

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namespace PDE
{
    public partial class ConfigurationForm : Form
    {

        public ConfigurationForm()
        {
            InitializeComponent();
        }        

        private void ApplyConfiguration_Click(object sender, System.EventArgs e)
        {
            this.DialogResult = DialogResult.OK;
            this.Close();
        }

        private void CancelConfiguration_Click(object sender, System.EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
            this.Close();
        }

        public string TextInTextBoxAufForm2
        {
            get { return this.txtAufForm2.Text; }
            set { this.txtAufForm2.Text = value; }
        }
    }
}					

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private void Configuration_Click(object sender, EventArgs e)
{
  this.Hide();
  ConfigurationForm configurationForm = new ConfigurationForm();
  /*var result =*/ configurationForm.ShowDialog();
  if (configurationForm.DialogResult == DialogResult.OK) // alternativ: if (result == DialogResult.OK)
  {
     // configurationForm.Close(); // Dies ist bei ShowDialog überflüssig, da das Fenster automatisch bei OK oder Cancel geschlossen wird.

     var text = configurationForm.TextInTextBoxAufForm2; // Eigenschaft auslesen
  }

  this.Show();
}					

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namespace PDE
{
    public partial class ConfigurationForm : Form
    {        
        public ConfigurationForm()
        {
            InitializeComponent();
        }        

        private void ApplyConfiguration_Click(object sender, System.EventArgs e)
        {
            this.DialogResult = DialogResult.OK;
            this.Close();
        }

        private void CancelConfiguration_Click(object sender, System.EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
            this.Close();
        }
############################################################
        public string TextChooseTargetPath
        {
            get { return this.txtChooseTargetPath.Text; }
            set { this.txtChooseTargetPath.Text = value; }
        }
############################################################
    }
}					

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 private void Configuration_Click(object sender, EventArgs e)
        {
            this.Hide();
            ConfigurationForm configurationForm = new ConfigurationForm();
            var result = configurationForm.ShowDialog(this);
            if (result == DialogResult.OK)
            {
                var textChooseTargetPath = configurationForm.TextChooseTargetPath; // Eigenschaft auslesen
                
            }

            this.Show();
        }					

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 private void ApplyPathConfig_Click(object sender, EventArgs e)
        {
##########################################################################            
            if (string.IsNullOrEmpty(txtChooseTargetPath.Text)) <--- txtChooseTargetPath.Text ist rot unterstrichen
##########################################################################
            {
                DialogResult result = MessageBox.Show("Ziel-Pfad fehlt?", "Confirmation", MessageBoxButtons.YesNo);
                if (result == DialogResult.Yes)
                {
                    SaveLocalPathConfigSettings();
                    SaveNetPathConfigSettings();

                    MessageBox.Show("Konfiguration gespeichert.");
                }
                else if (result == DialogResult.No)
                {
                    return;
                }
            }

            txtChooseTargetPath.Enabled = string.IsNullOrEmpty(txtChooseTargetPath.Text);

            SaveLocalPathConfigSettings();
            SaveNetPathConfigSettings();					

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public class UIPathValues
{
  public string ChooseTargetPath { get; set; }
....
....
....
usw.
  
}					

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UIPathValues myUIPathValues = new UIPathValues()
myUIPathValues.Data1 = "test";
myUIPathValues.Data2 ="fall";					

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public partial class ConfigurationForm : Form
{
  private UIPathValues _uipathvalues = null;

  public ConfigurationForm(UIPathValues uipathvalues) 
  {
    _uipathvalues = uipathvalues;
  }
}					

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private UIPathValues myUIPathValues = new UIPathValues();					

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 private bool AnyAppIsActivated()
        {
            if (!cbActivateLocalApps.Any(cb => cb.Checked) && !cbActivateNetApps.Any(cb => cb.Checked))
            {
                return true;
            }

            return false;
        }					

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private bool IsAnyChecked(CheckBox[] checkboxes)
{
  return checkboxes.Any(cb => cb.Checked);
}					

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private bool IsAnyChecked(params CheckBox[] checkboxes)
{
  foreach (var cbs in checkboxes)
    if (cbs.Any(cb => cb.Checked))
       return true;
  
  return false;
}					

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IsAnyChecked(cbActivateLocalApps, cbActivateNetApps);					

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private bool IsAnyChecked(params CheckBox[] checkboxes)
{
  return checkboxes.SelectMany(cbs => cbs).Any(cb => cb.Checked);
}					

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private bool IsAnyChecked(params CheckBox[] checkboxes)
{
  foreach (var cbs in checkboxes)
    if (cbs.Any(cb => cb.Checked))
       return true;
  
  return false;
}					

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foreach(Control c in currentTab.Controls)
{
    if(c is TextBox)
        // check for text change
    if(c is CheckBox)
        //check for check change
    etc...
}					

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private static bool IsAnyChecked(params CheckBox[][] checkboxes)					

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public void ReadSettings(Settings settings, int nr)
{
  string name = "Setting" + nr; // <- hier richtigen Settings-Eigenschaftennamen eintragen
  checkBox.Checked = (bool)settings[name];
  // ...
}					

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public partial class MainForm : Form
    {
        private const string DEFAULTTARGETPATH = @"D:\S7_Export\AppData";
        private S7Client s7Client;
        private ComboBox[] cboLocalApps;
        private TextBox[] tbSourceFilePathLocalApps;
        private CheckBox[] cbActivateLocalApps;
        private CheckBox[] cbLocalSubFolderUses;					

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 cboLocalApps = new ComboBox[] { cboLocalApp1, cboLocalApp2, cboLocalApp3, cboLocalApp4, cboLocalApp5, cboLocalApp6, cboLocalApp7, cboLocalApp8 };
            tbSourceFilePathLocalApps = new TextBox[] { txtSourceFilePathLocalApp1, txtSourceFilePathLocalApp2, txtSourceFilePathLocalApp3, txtSourceFilePathLocalApp4, txtSourceFilePathLocalApp5, txtSourceFilePathLocalApp6, txtSourceFilePathLocalApp7, txtSourceFilePathLocalApp8 };					

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 private void MainForm_Load(object sender, EventArgs e)
{
     GetLocalPathConfigSettings();
     GetNetPathConfigSettings();					

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public void GetLocalPathConfigSettings()
{
    var settings = Settings.Default;

    txtChooseTargetPath.Text = settings.TargetPath;

###################################################################
    settings.GetControlTexts(cboLocalApps, "LocalApp");
###################################################################

    settings.GetControlTexts(tbSourceFilePathLocalApps, "LocalSourceFilePath");
    settings.GetCheckBoxes(cbActivateLocalApps, "LocalAppAktiv");
    settings.GetCheckBoxes(cbLocalSubFolderUses, "LocalSubFolderUse");
    settings.GetCheckBoxes(cbActivateCode2LocalApps, "ActivateCode2LocalApp");

    txtLocalApplication.Text = settings.LocalApplication;
        }					

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namespace WindowsFormsApp11
{
    public partial class Form1 : Form
    {
        private UserControl[] userControls;

        public Form1()
        {
            InitializeComponent();

            userControls = new UserControl[] { userControl1, userControl2 };
        }

       
}
}					

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const int MAXLOCALAPPS = 8;
            for (int n = 0; n < MAXLOCALAPPS; n++)
            {
                cboLocalApps[n].Items.AddRange(txtLocalApplication.Lines);
            }					

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namespace WindowsFormsApp11
{
    public partial class UserControl : System.Windows.Forms.UserControl
    {
        public UserControl()
        {
            InitializeComponent();
        }

        private void UserControl_Load(object sender, EventArgs e)
        {
####################################
Hier an diese Stelle
####################################
        }
    }
}					

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public FillValues(string[] lines) // oder noch eleganter: IEnumerable<string> (so daß es für alle möglichen String-Collections funktioniert)
{
  // evtl. noch: comboBox.Items.Clear();
  comboBox.Items.AddRange(lines);
}					

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public string Description
{
    get { return labelDescription.Text; }
    set { labelDescription.Text = value; }
}					

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private void BW_CopyAllFiles_ProgressChanged(object sender, ProgressChangedEventArgs e)
{            
   progressBar1.Value = e.ProgressPercentage;
   lblAllFilesCopied.Text = "Processing......" + progressBar1.Value.ToString() + "%";
}					

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        private void BW_CopyAllFiles_DoWork(object sender, DoWorkEventArgs e)
        {
            var bw = sender as BackgroundWorker;

            S7VariablenResult s7VariablenResult = ReadResult();

            //Ordner erstellen
            string createTargetPath = Path.Combine(DEFAULTTARGETPATH, s7VariablenResult.FolderName);
            Directory.CreateDirectory(createTargetPath);

            for (int l = 0; l < 100; l++)
            {
                if (bw.CancellationPending)
                {
                    // Set the e.Cancel flag so that the WorkerCompleted event
                    // knows that the process was cancelled.
                    e.Cancel = true;
                    bw.ReportProgress(0);
                    return;
                }
                else
                {
                    for (int i = 0; i < cbActivateLocalApps.Length; i++)
                    {
                        if (cbActivateLocalApps[i].Checked == true)
                        {
                            string praegeCodeNrFolderName = s7VariablenResult.FolderName;
                            string praegeCodeNrFileName = s7VariablenResult.PraegeCodeNr;
                            string sourceFilePath = uivalues.SourceFilePathLocalApps[i];
                            string targetPath = DEFAULTTARGETPATH;

                            MoveFilesfromLocal(praegeCodeNrFolderName, praegeCodeNrFileName, sourceFilePath, targetPath);					

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bw.ReportProgress(-1);					

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 private void BW_CopyAllFiles_DoWork(object sender, DoWorkEventArgs e)
{
     var bw = sender as BackgroundWorker;
###############################################################
     S7VariablenResult s7VariablenResult = ReadResult();
##################################################################
     //Ordner erstellen
     string createTargetPath = Path.Combine(DEFAULTTARGETPATH, s7VariablenResult.FolderName);
     Directory.CreateDirectory(createTargetPath);					

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 private S7VariablenResult ReadResult()
{
     S7VariablenResult s7VariablenResult = new S7VariablenResult();
     // Reads the buffer.

     byte[] dbbuffersize = new byte[uivalues.DBSize];

     s7Client.DBRead(uivalues.DBNr, uivalues.DBOffset, uivalues.DBSize, dbbuffersize);

     s7VariablenResult.PraegeCodeNr = S7.GetStringAt(dbbuffersize, uivalues.PraegeCodeDBPos);
     s7VariablenResult.FolderName = S7.GetStringAt(dbbuffersize, uivalues.FolderNameDBPos);
     s7VariablenResult.PraegeCode2Nr = S7.GetStringAt(dbbuffersize, uivalues.PraegeCode2DBPos);
     s7VariablenResult.TrigSaveFiles = S7.GetBitAt(dbbuffersize, uivalues.TrigSaveFilesByte, uivalues.TrigSaveFilesBit);
     s7VariablenResult.TypLeft = S7.GetBitAt(dbbuffersize, uivalues.TypLeftByte, uivalues.TypLeftBit);
     s7VariablenResult.TypRight = S7.GetBitAt(dbbuffersize, uivalues.TypRightByte, uivalues.TypRightBit);
     s7VariablenResult.RobotIsEmpty = S7.GetBitAt(dbbuffersize, uivalues.RobotIsEmptyByte, uivalues.RobotIsEmptyBit);
     s7VariablenResult.FilesAreCopied = S7.GetBitAt(dbbuffersize, uivalues.FilesAreCopiedByte, uivalues.FilesAreCopiedBit);
     s7VariablenResult.ConnectedToPLC = S7.GetBitAt(dbbuffersize, uivalues.ConnectedToPLCByte, uivalues.ConnectedToPLCBit);

     return s7VariablenResult;
}					

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namespace CSClient
{

    public partial class MainForm : Form
    {
        private S7Client Client;
        private byte[] Buffer = new byte[65536];