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USB_Relay_Control.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2013
+VisualStudioVersion = 12.0.31101.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "USB_Relay_Control", "USB_Relay_Control\USB_Relay_Control.csproj", "{42149B00-ABEA-4E10-9591-D4E6774C7860}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{42149B00-ABEA-4E10-9591-D4E6774C7860}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{42149B00-ABEA-4E10-9591-D4E6774C7860}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{42149B00-ABEA-4E10-9591-D4E6774C7860}.Debug|x86.ActiveCfg = Debug|x86
+		{42149B00-ABEA-4E10-9591-D4E6774C7860}.Debug|x86.Build.0 = Debug|x86
+		{42149B00-ABEA-4E10-9591-D4E6774C7860}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{42149B00-ABEA-4E10-9591-D4E6774C7860}.Release|Any CPU.Build.0 = Release|Any CPU
+		{42149B00-ABEA-4E10-9591-D4E6774C7860}.Release|x86.ActiveCfg = Release|x86
+		{42149B00-ABEA-4E10-9591-D4E6774C7860}.Release|x86.Build.0 = Release|x86
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

USB_Relay_Control/App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
+    </startup>
+</configuration>

USB_Relay_Control/Form1.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace USB_Relay_Control
+{
+
+    public partial class Form1 : Form
+    {
+        int _deviceHandle = 0;
+        List<Button> _buttonList;
+
+        public Form1()
+        {
+            InitializeComponent();
+
+            refreshList();
+
+            _buttonList = new List<Button>{
+                button1, button2, button3, button4,
+                button5, button6, button7, button8
+            };
+
+            if (listBox1.Items.Count > 0)
+                listBox1.SelectedIndex = 0;
+        }
+
+        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
+        {
+            if (_deviceHandle > 0)
+            {
+                RelayDeviceWrapper.usb_relay_device_close(_deviceHandle);
+                _deviceHandle = 0;
+            }
+
+            for (int i = 0; i < _buttonList.Count; i++){
+                _buttonList[i].BackColor = BackColor;
+                _buttonList[i].Enabled = false;
+            }
+
+            var lb = (ListBox)sender;
+            usb_relay_device_info device = (usb_relay_device_info)lb.SelectedItem;
+            _deviceHandle = RelayDeviceWrapper.usb_relay_device_open(ref device);
+            int numberOfRelays = (int)device.type;
+
+            uint status = 0;
+            RelayDeviceWrapper.usb_relay_device_get_status(_deviceHandle, ref status);
+
+            for (int i = 0; i < numberOfRelays; i++)
+            {
+                _buttonList[i].Enabled = true;
+                if (status > numberOfRelays)
+                    _buttonList[i].BackColor = Color.Red;
+                else if (i + 1 == status)
+                    _buttonList[i].BackColor = Color.Red;
+            }
+        }
+
+        private void refreshList()
+        {
+            listBox1.Items.Clear();
+            if (RelayDeviceWrapper.usb_relay_init() != 0)
+            {
+                Console.WriteLine("Couldn't initialize!");
+                MessageBox.Show("Couldn't initialize!");
+                return;
+            }
+            else { Console.WriteLine("Initialized successfully!"); }
+
+            List<usb_relay_device_info> devicesInfos = new List<usb_relay_device_info>();
+            usb_relay_device_info deviceInfo = RelayDeviceWrapper.usb_relay_device_enumerate();
+            devicesInfos.Add(deviceInfo);
+
+            while (deviceInfo.next.ToInt32() > 0)
+            {
+                deviceInfo = (usb_relay_device_info)Marshal.PtrToStructure(deviceInfo.next, typeof(usb_relay_device_info));
+                devicesInfos.Add(deviceInfo);
+            }
+
+            foreach (var device in devicesInfos)
+            {
+                listBox1.Items.Add(device);
+            }
+        }
+
+        private void button_Click(object sender, EventArgs e)
+        {
+            if (_deviceHandle <= 0)
+                return;
+
+            Button btn = (Button)sender;
+            string strNum = btn.Text.Substring(btn.Text.Length - 1, 1);
+            int num = int.Parse(strNum);
+
+            if (btn.BackColor == BackColor || btn.BackColor == Color.Transparent)
+            {
+                int openResult = RelayDeviceWrapper.usb_relay_device_open_one_relay_channel(_deviceHandle, num);
+            }
+            else
+            {
+                int closeResult = RelayDeviceWrapper.usb_relay_device_close_one_relay_channel(_deviceHandle, num);
+            }
+            btn.BackColor = (btn.BackColor == Color.Red) ? BackColor : Color.Red;
+        }
+
+        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
+        {
+            if (_deviceHandle > 0)
+                RelayDeviceWrapper.usb_relay_device_close(_deviceHandle);
+        }
+
+    }
+}