網站無法顯示

Question

我在我的網站上使用這段代碼來獲取MySQL連接類。但通常連接每隔一小時或兩小時就會丟失。發生這種情況時，MySQL連接類不起作用，我的網站索引頁面無法顯示。我不知道這個問題的原因。

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 


using MySql.Data.MySqlClient; 
using System.Configuration; 
using System.Data; 


namespace hys 
{ 
public class dbIslem 
{ 

    MySqlConnection baglanti = new MySqlConnection(ConfigurationSettings.AppSettings["hys"].ToString()); 


    // işlem metodlarımız 
    public void BaglantiAc() 
    { 
     try 
     { 
      //bağlantı durumu kontrol edilip kapalı ise açılır 
      if (baglanti.State == ConnectionState.Closed) 
      { 
       baglanti.Open(); 
      } 
    else if(baglanti == null) 
      { 
       baglanti.Close(); 
       baglanti.Open(); 
      } 

      // 
     } 
     catch (Exception ex) 
     { 

      ex.Message.ToString(); 
     } 

    } 


    public void BaglantiKapat() 
    { 
     if (baglanti.State == ConnectionState.Open) 
     { 
      baglanti.Close(); 
    baglanti = null; 

     } 


    } 


    public void BaglantiDurumu() 
    { 

     BaglantiAc(); 
     string baglantiDurumu = baglanti.State.ToString(); 
     BaglantiKapat(); 
    } 


    public int KayitIslem(string sorguCumlesi) 
    { 
     BaglantiAc(); 

     MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 
     int sonuc = sorgu.ExecuteNonQuery(); 
     baglanti.Close(); 
     return sonuc; 

    } 


    public int KayitEkle(string sorguCumlesi) 
    { 
     BaglantiAc(); 

     MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 
     int sonuc = sorgu.ExecuteNonQuery(); 
     baglanti.Close(); 
     return sonuc; 

    } 

    public int KayitDuzenle(string sorguCumlesi) 
    { 
     BaglantiAc(); 

     MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 
     int sonuc = sorgu.ExecuteNonQuery(); 
     baglanti.Close(); 
     return sonuc; 

    } 

    public int KayitSil(string sorguCumlesi) 
    { 
     BaglantiAc(); 

     MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 
     int sonuc = sorgu.ExecuteNonQuery(); 
     baglanti.Close(); 
     return sonuc; 
    } 

    public int KayitScalar(string sorguCumlesi) 
    { 
     BaglantiAc(); 
     MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 
     int sonuc = Convert.ToInt32(sorgu.ExecuteScalar()); 
     return sonuc; 
    } 


    public MySqlDataReader KayitGetir_DataReader(string sorguCumlesi) 
    { 

     BaglantiAc(); 

     MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 
     MySqlDataReader dr = sorgu.ExecuteReader(); 
     return dr; 

    } 


    public DataSet KayitGetir_DataSet(string sorguCumlesi) 
    { 
     DataSet ds = new DataSet(); 
     MySqlDataAdapter dtAdapter = new MySqlDataAdapter(); 

     BaglantiAc(); 

     MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 

     dtAdapter.SelectCommand = sorgu; 

     try //hatali kayit varsa bile doldur, hata firlatma. 
     { 
      dtAdapter.Fill(ds); 
     } 
     catch 
     { 

     } 


     return ds; 
    } 


    public DataTable KayitGetir_DataTable(string sorguCumlesi) 
    { 
     DataTable dt = new DataTable(); 
     MySqlDataAdapter dtAdapter = new MySqlDataAdapter(); 

     BaglantiAc(); 

     MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 

     dtAdapter.SelectCommand = sorgu; 
     dtAdapter.Fill(dt); 
     return dt; 

    } 



    public string KayitAra(string sorguCumlesi) 
    { 
     BaglantiAc(); 

     MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 
     int sonuc = sorgu.ExecuteNonQuery(); 

     //baglanti.Close(); 
     string sonucstring = Convert.ToString(sonuc); 
     MySqlDataReader okuyucu = sorgu.ExecuteReader(CommandBehavior.CloseConnection); 
     //Gelen datayı sonuc değişkenine aktar.  
     while(okuyucu.Read())  
     { 
      sonucstring = okuyucu.GetString(0);  
     }  
     okuyucu.Close(); 


     return sonucstring; 

    } 

} 

}

Answer 1

你應該總是關閉連接。而不是做例如

BaglantiAc(); 
MySqlCommand sorgu = new MySqlCommand(sorguCumlesi, baglanti); 
int sonuc = sorgu.ExecuteNonQuery(); 
baglanti.Close(); 
return sonuc; 

不要

using (MySqlConnection connection = new MySqlConnection(connectionString)) 
{ 
    MySqlCommand command = new MySqlCommand(queryString, connection); 
    command.Connection.Open(); 
    command.ExecuteNonQuery(); 
} 

的using語句將調用MySqlConnection.Dispose（）和MySqlConnection.Close（）

Answer 2

與你的類dbIslem實現IDisposable接口和重寫的Dispose（）方法，方式。

public class dbIslem:IDisposable 
{ 

public void Dispose() 
{ 
baglanti.Dispose(); 
command.Dispose(); 
} 

}