[英]SQL update using data collected by C# from Arduino Serial
我正在尝试编写一个简单的C#程序,它将读取通过串行连接的Arduino的数据输出,将相关数据从格式化为便于理解的文本字符串中移出串行监视器,并显示两个信息在两个用作计数器的只读文本框中(每次更新信息时都会覆盖),并使用这些数字来更新SQL表。
例:
Arduino输出:
'Day Users: 234231'
'All Users: 433241'
C#在textbox1中显示完整消息
C#在textbox2中显示234231
C#在textbox3中显示433241
C#UPDATES SQL表类似于:
SqlCommand myCommand = new SqlCommand("UPDATE USER_NUMBERS
SET NUMBERZ= 234231
WHERE UPTIME = DAYHK");
但是显然,'234231'是一个变量,由Arduino的输入指定,然后通知textbox2的内容和更新SQL表所需的值。
我是C#的新手,但到目前为止,我有一个程序可以读取Arduino的串行数据,并将整个输出放入textbox1中,但仅此而已。
我如何在要分配给值的传入数据中指定一部分作为textbox2(或textbox3)中的文本输出,然后使用它来做这件事和更新SQL表中保存的值?
到目前为止,我的代码是:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Serial_Reader
{
public partial class Form1 : Form
{
string RxString;
public Form1()
{
InitializeComponent();
}
private void buttonStart_Click(object sender, EventArgs e)
{
serialPort1.PortName = "COM3";
serialPort1.BaudRate = 9600;
serialPort1.Open();
if (serialPort1.IsOpen)
{
buttonStart.Enabled = false;
buttonStop.Enabled = true;
buttonSQL.Enabled = true;
textBox1.ReadOnly = false;
}
}
private void buttonStop_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
serialPort1.Close();
buttonStart.Enabled = true;
buttonStop.Enabled = false;
buttonSQL.Enabled = false;
textBox1.ReadOnly = true;
}
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
// If the port is closed, don't try to send a character.
if (!serialPort1.IsOpen) return;
// If the port is Open, declare a char[] array with one element.
char[] buff = new char[1];
// Load element 0 with the key character.
buff[0] = e.KeyChar;
// Send the one character buffer.
serialPort1.Write(buff, 0, 1);
// Set the KeyPress event as handled so the character won't
// display locally. If you want it to display, omit the next line.
e.Handled = true;
}
private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
RxString = serialPort1.ReadExisting();
this.Invoke(new EventHandler(DisplayText));
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (serialPort1.IsOpen) serialPort1.Close();
}
private void DisplayText(object sender, EventArgs e)
{
textBox1.AppendText(RxString);
}
private void buttonSQL_Click(object sender, EventArgs e)
{
}
}
}
你可以从“我”擅长评论,但不称职的节目中,我使用的代码从辉煌教程看这里 :和所有我的计划将有额外的一个按钮,开始SQL通信,当串行通信被拦停,和两个额外的文本框。
编辑 :
输入的格式为:
Someone got up from seat number 9
All-time users on seat number 9 is: 5
Today's total users: 17
All-time total users: 17
这样,非程序员检查串行监视器就可以轻松理解输出。 第一行始终是“有人从那里站起来”或“有人坐下来”,在第二行上,只有数字改变了,在第三和第四行上又改变了,但是在第三和第四行上(这种情况是相同的,因为系统运行时间少于一天)是需要解析的系统。
编辑2 (新代码):
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace Serial_Reader
{
public partial class Form1 : Form
{
string RxString;
public Form1()
{
InitializeComponent();
}
private void buttonStart_Click(object sender, EventArgs e)
{
serialPort1.PortName = "COM3";
serialPort1.BaudRate = 9600;
serialPort1.Open();
if (serialPort1.IsOpen)
{
buttonStart.Enabled = false;
buttonStop.Enabled = true;
buttonSQL.Enabled = true;
textBox1.ReadOnly = true;
}
}
private void buttonStop_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
serialPort1.Close();
buttonStart.Enabled = true;
buttonStop.Enabled = false;
buttonSQL.Enabled = false;
textBox1.ReadOnly = true;
}
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
// If the port is closed, don't try to send a character.
if (!serialPort1.IsOpen) return;
// If the port is Open, declare a char[] array with one element.
char[] buff = new char[1];
// Load element 0 with the key character.
buff[0] = e.KeyChar;
// Send the one character buffer.
serialPort1.Write(buff, 0, 1);
// Set the KeyPress event as handled so the character won't
// display locally. If you want it to display, omit the next line.
e.Handled = true;
}
private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
RxString = serialPort1.ReadExisting();
this.Invoke(new EventHandler(DisplayText));
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (serialPort1.IsOpen) serialPort1.Close();
}
private void DisplayText(object sender, EventArgs e)
{
textBox1.AppendText(RxString);
}
private void buttonSQL_Click(object sender, EventArgs e)
{
// SqlConnection myConnection = new SqlConnection("user id=username;" +
// "password=password;server=serverurl;" +
// "Trusted_Connection=yes;" +
// "database=database; " +
// "connection timeout=30");
do
{
string dayUsers, allUsers;
string s1 = "Today's total users: ";
string s2 = "All-time total users: ";
if (RxString.Contains(s1))
{
dayUsers = RxString.Replace(s1, "");
textDU.Text = dayUsers;
// string queryDay = "UPDATE USER_NUMBERS SET NUMBERZ=" + dayUsers + "WHERE UPTIME=DAYHK";
}
if (RxString.Contains(s2))
{
allUsers = RxString.Replace(s2, "");
textAU.Text = allUsers;
// string queryAll = "UPDATE USER_NUMBERS SET NUMBERZ=" + allUsers + "WHERE UPTIME=ALLHK";
}
}
while (serialPort1.IsOpen);
}
private void textDU_TextChanged(object sender, EventArgs e)
{
}
private void textAU_TextChanged(object sender, EventArgs e)
{
}
}
}
编辑3 (传入数据):
if (abs (then [i] - now[i]) > THRESH)
{
Serial.print ("Someone ");
if (now [i] > then [i])
{
Serial.print ("sat on");
allusers++;
dayusers++;
digitalWrite(counterPin, HIGH); // hit counter
delay(75);
digitalWrite(counterPin, LOW);
val[i]++;
}
else
{
Serial.print ("got up from");
}
Serial.print (" seat number ");
Serial.println (i);
Serial.print ("All-time users on seat number ");
Serial.print (i);
Serial.print (" is: ");
Serial.println (val[i]);
Serial.print ("Today's total users: ");
Serial.println (dayusers);
Serial.print ("All-time total users: ");
Serial.println (allusers);
}
如果您知道输入字符串始终采用相同的格式,并且数字始终具有6位数字,则可以使用简单的子字符串:
int dayUsers, allUsers;
Int32.TryParse(RxString.Substring(12, 6), out dayUsers);
Int32.TryParse(RxString.Substring(32, 6), out allUsers);
否则,您可以使解析更加复杂:
int dayUsers, allUsers;
string[] parts = RxString.Split('\'', ':');
if (parts.Length > 5)
{
Int32.TryParse(parts[2].Trim(), out dayUsers);
Int32.TryParse(parts[5].Trim(), out allUsers);
}
然后,只需使用文本框中的数字和SQL查询即可:
textBox2.Text = dayUsers.ToString();
textBox3.Text = allUsers.ToString();
string query = "UPDATE USER_NUMBERS SET NUMBERZ=" + dayUsers + "WHERE UPTIME=DAYHK"
编辑:鉴于textBox1中有四行数据,您可以使用类似这样的方法来提取包含数字的字符串:
string[] inputLines = textBox1.Text.Split('\n');
if (inputLines.Length == 4)
{
string dayUsers = inputLines[2].Substring(inputLines[2].IndexOf(':') + 1).Trim();
string allUsers = inputLines[3].Substring(inputLines[3].IndexOf(':') + 1).Trim();
}
编辑2:建议代码解析TextBox1中的数据可能不完整:
private void buttonSQL_Click(object sender, EventArgs e)
{
// Get unsaved input from text box
string input = textBox1.Text;
string[] inputLines = input.Split('\n');
// Find and process relevant input
foreach(string line in inputLines)
{
if (line.EndsWith("\r")) // Make sure line is complete
{
if (line.StartsWith("Today's total users: "))
{
string dayUsers = line.Substring(20).Trim();
textDU.Text = dayUsers;
// SQL query...
}
else if (line.StartsWith("All-time total users: "))
{
string allUsers = line.Substring(21).Trim();
textAU.Text = allUsers;
// SQL query...
}
}
}
// Only keep unparsed text in text box
textBox1.Text = inputLines[inputLines.Length - 1];
}
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