在C＃中讀取文本文件併發送數據到mysql查詢

Question

我在這裏是新來的，我需要一些幫助。希望你們能解決我的問題。

我已成功創建一個Windows服務，通過使用計時器從服務器發送數據（時間和日期戳記）。唯一阻止我這樣做的是文本文件。我想將文本文件中的數據用作mysql命令下的「where命令」。

看到下面的代碼：

using System; 
using System.IO; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Diagnostics; 
using System.Linq; 
using System.ServiceProcess; 
using System.Text; 
using System.Timers; 
using System.Threading.Tasks; 
using MySql.Data.MySqlClient; 

namespace bicmwinservice 
{ 
    public partial class Service1 : ServiceBase 
    { 
     public Service1() 
     { 
      InitializeComponent(); 
     } 

     public void OnDebug() 
     { 
      OnStart(null); 
     } 

     private Timer count; 

     protected override void OnStart(string[] args) 
     { 

      count = new Timer(1 * 60 * 1000); // 5 minutes expressed as milliseconds 
      count.Elapsed += new ElapsedEventHandler(OnTimerElapsed); 
      count.AutoReset = true; 
      count.Start(); 

     } 

     protected override void OnStop() 
     { 
      System.IO.File.Create(AppDomain.CurrentDomain.BaseDirectory + "OnStop.txt");   
     } 

     private void OnTimerElapsed(object sender, ElapsedEventArgs e) 
     { 


       DateTime time = DateTime.Now; 
       DateTime date = DateTime.Now; 


       string connString = "Server=mysql1003.mochahost.com;Database=snowphil_tester;Uid=snowphil_test;password=snowphil_test;"; 
       MySqlConnection conn = new MySqlConnection(connString); 
       MySqlCommand command = conn.CreateCommand(); 


       StreamReader read = new StreamReader(@"C:\brcode.txt", Encoding.Default); 

       command.CommandText = "Update branch_monitor SET `date`='" + date.ToString("yyyy'-'MM'-'dd") + "', `time`= '" + time.ToString("HH':'mm':'ss") + "' WHERE branch_code='" + read + "'"; 
       conn.Open(); 
       command.ExecuteNonQuery(); 

       conn.Close(); 

     } 

    } 
} 

如果我更換WHERE = 「」 與當前的數據，我想。該代碼正在工作，並在服務器上發送數據。

謝謝你們！快樂的編碼。

Answer 1

試試這個

using System; 
using System.IO; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Diagnostics; 
using System.Linq; 
using System.ServiceProcess; 
using System.Text; 
using System.Timers; 
using System.Threading.Tasks; 
using MySql.Data.MySqlClient; 

namespace bicmwinservice 
{ 
    public partial class Service1 : ServiceBase 
    { 
     public Service1() 
     { 
      InitializeComponent(); 
     } 

     public void OnDebug() 
     { 
      OnStart(null); 
     } 

     private Timer count; 

     protected override void OnStart(string[] args) 
     { 

      count = new Timer(1 * 60 * 1000); // 5 minutes expressed as milliseconds 
      count.Elapsed += new ElapsedEventHandler(OnTimerElapsed); 
      count.AutoReset = true; 
      count.Start(); 

     } 

     protected override void OnStop() 
     { 
      System.IO.File.Create(AppDomain.CurrentDomain.BaseDirectory + "OnStop.txt");   
     } 

     private void OnTimerElapsed(object sender, ElapsedEventArgs e) 
     { 


       DateTime time = DateTime.Now; 
       DateTime date = DateTime.Now; 


       string connString = "Server=mysql1003.mochahost.com;Database=snowphil_tester;Uid=snowphil_test;password=snowphil_test;"; 
       MySqlConnection conn = new MySqlConnection(connString); 
       MySqlCommand command = conn.CreateCommand(); 

       string read = File.ReadAllText(@"C:\brcode.txt"); 


       command.CommandText = "Update branch_monitor SET `date`='" + date.ToString("yyyy'-'MM'-'dd") + "', `time`= '" + time.ToString("HH':'mm':'ss") + "' WHERE branch_code='" + read + "'"; 
       conn.Open(); 
       command.ExecuteNonQuery(); 

       conn.Close(); 

     } 

    } 
} 

Answer 2

問題：

1. 請問你的源文件有多行？即

   0099 
   0100 
   0101 
   

2. 或者它是2行還是空的第二行嗎？如果是這樣，你實際上是越來越

   0099\n 
   

解決方案：

1. 多張線

   foreach (string line in File.ReadAllLines(@"C:\brcode.txt")) 
   { 
       [your sql connection code] 
       "... WHERE branch_code='" + line + "';" 
   } 
   

2. 也許你只需要修剪換行，如果你只希望源文件中的單行：

   string line = File.ReadAllText(@"C:\brcode.txt").Trim();