combobox to button

Question

 Hello, I could use some help with a combobox to simple button

The code below generates a combo_box that selects a channel, a check box to select hi/low, and a button to execute. What I've been trying to do for tha last 20 hours is make all of this one button. Instead of the checkbox, I'd like the output to go hi on buttondown and low on buttonup. I'd like to remove the combo box and just "hard wire" the first address (Dev1/Port0/line0)  to button1. Can anyone help with the syntax? I don't know how this line "physicalChannelComboBox.Items.AddRange(DaqSystem.Local.GetPhysicalChannels(PhysicalChannelTypes.DOLine, PhysicalChannelAccess.External));" brings in the info "Dev1/Port0/line0" .

thanks

 

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using NationalInstruments.DAQmx;

namespace NationalInstruments.Examples.WriteDigitalChannel

{

/// <summary>

/// Summary description for Mainform.

/// </summary>

public class MainForm : System.Windows.Forms.Form

{

private System.Windows.Forms.CheckBox bit0CheckBox;

private System.Windows.Forms.Label bit0Label;

private System.Windows.Forms.Button writeButton;

private System.Windows.Forms.ComboBox physicalChannelComboBox;

private System.ComponentModel.Container components = null;

public MainForm()

{

InitializeComponent();

physicalChannelComboBox.Items.AddRange(DaqSystem.Local.GetPhysicalChannels(PhysicalChannelTypes.DOLine, PhysicalChannelAccess.External));

}

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

}

base.Dispose( disposing );

}

#region Windows Form Designer generated code

private void InitializeComponent()

{

System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(MainForm));

this.writeButton = new System.Windows.Forms.Button();

this.bit0CheckBox = new System.Windows.Forms.CheckBox();

this.bit0Label = new System.Windows.Forms.Label();

this.physicalChannelComboBox = new System.Windows.Forms.ComboBox();

this.SuspendLayout();

//

// writeButton

//

this.writeButton.FlatStyle = System.Windows.Forms.FlatStyle.System;

this.writeButton.Location = new System.Drawing.Point(63, 102);

this.writeButton.Name = "writeButton";

this.writeButton.Size = new System.Drawing.Size(80, 24);

this.writeButton.TabIndex = 0;

this.writeButton.Text = "&Write";

this.writeButton.Click += new System.EventHandler(this.WriteButton_Click);

//

// bit0CheckBox

//

this.bit0CheckBox.FlatStyle = System.Windows.Forms.FlatStyle.System;

this.bit0CheckBox.Location = new System.Drawing.Point(19, 62);

this.bit0CheckBox.Name = "bit0CheckBox";

this.bit0CheckBox.Size = new System.Drawing.Size(16, 16);

this.bit0CheckBox.TabIndex = 6;

this.bit0CheckBox.Text = "Line0";

//

// bit0Label

//

this.bit0Label.Location = new System.Drawing.Point(16, 81);

this.bit0Label.Name = "bit0Label";

this.bit0Label.Size = new System.Drawing.Size(16, 16);

this.bit0Label.TabIndex = 5;

this.bit0Label.Text = "0";

//

// physicalChannelComboBox

//

this.physicalChannelComboBox.Location = new System.Drawing.Point(16, 24);

this.physicalChannelComboBox.Name = "physicalChannelComboBox";

this.physicalChannelComboBox.Size = new System.Drawing.Size(184, 21);

this.physicalChannelComboBox.TabIndex = 2;

this.physicalChannelComboBox.Text = "Dev1/Port0/line0";

this.physicalChannelComboBox.SelectedIndexChanged += new System.EventHandler(this.physicalChannelComboBox_SelectedIndexChanged);

//

// MainForm

//

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.ClientSize = new System.Drawing.Size(216, 146);

this.Controls.Add(this.physicalChannelComboBox);

this.Controls.Add(this.bit0Label);

this.Controls.Add(this.bit0CheckBox);

this.Controls.Add(this.writeButton);

this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;

this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));

this.MaximizeBox = false;

this.Name = "MainForm";

this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;

this.Text = "Write Dig Channel";

this.ResumeLayout(false);

}

#endregion

/// The main entry point for the application.

[STAThread]

static void Main()

{

Application.EnableVisualStyles();

Application.DoEvents();

Application.Run(new MainForm());

}

private void WriteButton_Click(object sender, System.EventArgs e)

{

Cursor.Current = Cursors.WaitCursor;

try

{

using (Task digitalWriteTask = new Task())

{

digitalWriteTask.DOChannels.CreateChannel(physicalChannelComboBox.Text,"",

ChannelLineGrouping.OneChannelForAllLines);

bool[] dataArray = new bool[1];

dataArray[0] = bit0CheckBox.Checked;

DigitalSingleChannelWriter writer = new DigitalSingleChannelWriter(digitalWriteTask.Stream);

writer.WriteSingleSampleMultiLine(true, dataArray);

}

}

catch(DaqException ex)

{

MessageBox.Show(ex.Message);

}

finally

{

Cursor.Current = Cursors.Default;

}

}

private void button1_click(object sender, EventArgs e)

{

}

private void physicalChannelComboBox_SelectedIndexChanged(object sender, EventArgs e)

{

}

}

}