如何将wifi扫描数据插入SQL Server表

Question

我已经用C＃扫描了wifi数据，并将其分为所需的MAC，SSID和RSSi格式。 当我按下按钮时，结果应该插入到我已经创建的SQL Server表中。 如果我再次按下该按钮，它将停止插入。 我已经尝试了几种方法，但无法正常工作，不胜感激

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO.Ports;

namespace WICED_SERIALPORT_TEST
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

       private void button1_Click(object sender, EventArgs e)
       {
           string[] ports = SerialPort.GetPortNames();

           foreach (string port in ports)
           {
               comboBox1.Items.Add(port);
           }
       }

       string t;

       private void button2_Click(object sender, EventArgs e)
       {
           t = comboBox1.Text.ToString();
           sErial(t);
       }

       SerialPort sp;

       void sErial(string Port_name)
       {
           sp = new SerialPort(Port_name, 115200, Parity.None,8, 
     StopBits.One);    
           sp.DataReceived += new 
           SerialDataReceivedEventHandler(DataReceivedHandler);
           sp.Open();
       }

       private void DataReceivedHandler(object sender, 

       SerialDataReceivedEventArgs e)
       {
           SerialPort sp = (SerialPort)sender;
           string msg = string.Empty;
           bool canCont = false;

           while (!canCont)
           {
               msg += sp.ReadLine();

               if (msg.Contains("Scan complete "))
               {
                   canCont = true;
               }
           }

           //string w = sp.ReadLine();
           //string w = sp.ReadExisting();

           // string msg = sp.ReadExisting();

           string[] msgArr = msg.Split('\r');

           Invoke(new Action(() => listBox1.Items.Clear()));

           List<string[]> list = new List<string[]>();
           List<Networks> Scan = new List<Networks>();

           for (int i = 0; i < msgArr.Length; i++)
           {
               list.Add(msgArr[i].Split(new string[] { "  " }, 
   StringSplitOptions.RemoveEmptyEntries));
           }

           for (int i = 0; i < list.Count; i++)
           {
               if (i > 2)
               {
                   if (list[i].Length > 4)
                   {
                        int numOfSplits = 0;
                        List<string> tempList = new List<string>();

                        for (int ii = 0; ii < list[i].Length; ii++)
                        {
                            if (numOfSplits < 6)
                            {
string[] temp1 = list[i][ii].Split(new char[] { ' ' },  
StringSplitOptions.RemoveEmptyEntries);
                                numOfSplits += temp1.Length;

                                for (int iii = 0; iii < temp1.Length; iii++)
                                {
                                    tempList.Add(temp1[iii]);
                                }
                            }
                            else
                            {
                                tempList.Add(list[i][ii]);
                            }
                        }

                        Scan.Add(new Networks()
                        {
                            ID = Convert.ToInt32(tempList[0]),
                            NetworkType = tempList[1],
                            MAC = tempList[2],
                            RSSi = Convert.ToInt32(tempList[3]),
                            Rate = Convert.ToDouble(tempList[4]),
                            Channel = Convert.ToInt32(tempList[5]),
                            Security = tempList[6],
                            SSID = tempList[7],
                        });
                    }
               }
          }

          if (msg != String.Empty)
          {
              Invoke(new Action(() => richTextBox1.AppendText(msg)));
          }

          for (int i = 0; i < Scan.Count; i++)
          {
             Invoke(new Action(() => listBox1.Items.Add(Scan[i].MAC)));
             Invoke(new Action(() => listBox2.Items.Add(Scan[i].RSSi)));
             Invoke(new Action(() => listBox3.Items.Add(Scan[i].SSID)));

             msg = string.Empty;
             list.Clear();
          }
      }

    public SqlConnection con = new SqlConnection(@"Data Source=    
(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\AP_SCAN_DATA.mdf;
 Integrated Security=True");

    private void button3_Click(object sender, EventArgs e)
    {
        using (SqlConnection connection = new SqlConnection(@"Data  Source=
(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\AP_SCAN_DATA.mdf;   
Integrated Security=True"))
        {
           using (SqlCommand command = new SqlCommand())
           {
               command.Connection = connection;            // <== lacking
               command.CommandType = CommandType.Text;
               command.CommandText = "INSERT into LOCATIONSCAN ((Scan[i].SSID), (Scan[i].MAC),(Scan[i].RSSi)) VALUES (@SSID, @MAC, @RSSi)";

               command.Parameters.AddWithValue("@SSID", listBox1);
               command.Parameters.AddWithValue("@MAC", listBox2);
               command.Parameters.AddWithValue("@RSSi",listBox3);

               try
               {
                   connection.Open();
                   int recordsAffected = command.ExecuteNonQuery();
               }
               catch(SqlException)
               {
                   // error here
               }
               finally
               {
                   connection.Close();
               }
           }
       }
    }
 }

Answer 1

首先，您有一个空的CATCH块，它将导致您的SqlExceptions静默消失。 删除CATCH，该异常将对您有所帮助。 其次，您的CommandText看起来很奇怪，不知道您的数据库模式，我想应该是这样的。

command.CommandText = "INSERT into LOCATIONSCAN (SSID, MAC, RSSi) VALUES ('@SSID', '@MAC', '@RSSi')";

下一个问题是，添加参数时，您必须指定包含值的列表框的属性。 例如，它可能是SelectedValue属性。

command.Parameters.AddWithValue("@SSID", listBox1.SelectedValue);