Question

我正在编写C＃代码并使用LINQ和一些存储过程，我小心打开和关闭连接，但我一直收到此错误。

Timeout expired.  
The timeout period elapsed prior to obtaining a connection from the pool.  
This may have occurred because all pooled connections were in use and max pool size was reached.

我的代码完全正常，除了出现此错误，我该怎么办呢？

感谢任何想法。

 public static List<int> GetIslemIdleribySPbyCariId(int cariId)
    {
        string connString = System.Configuration.ConfigurationManager.ConnectionStrings["LocalSqlServer1"].ConnectionString;

        SqlConnection sqlConn = new SqlConnection(connString);
        sqlConn.Open();

        List<int> islemidleri = new List<int>();
        islemidleri.Clear();

        SqlCommand cmd;
        cmd = new SqlCommand("GetIslemIdleri", sqlConn);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add(new SqlParameter("@CARIID", cariId));

        using (var reader = cmd.ExecuteReader())
        {
            while (reader.Read())
            {
                islemidleri.Add(reader.GetInt32(0));

            }
            cmd.Parameters.Clear();
        }

        sqlConn.Close();

        return islemidleri;

    }
    /// <summary>
    /// SP kullanarak dovizturlerini döndürür
    /// </summary>
    /// <returns>string listesi döndürür için döviz türleri var TL, USD vs.</returns>
    public static List<string> GetDovizTurleribySP()
    {
        string connString = System.Configuration.ConfigurationManager.ConnectionStrings["LocalSqlServer1"].ConnectionString;

        SqlConnection sqlConn = new SqlConnection(connString);
        sqlConn.Open();

        List<string> dovizTanimlari = new List<string>();

        string commandGetDovizTanimlari = "EXEC GetDovizTanimlari";
        SqlCommand cmd;
        cmd = new SqlCommand(commandGetDovizTanimlari, sqlConn);

        using (var reader = cmd.ExecuteReader())
        {
            while (reader.Read())
            {
                dovizTanimlari.Add(reader.GetString(0));
            }

        }
        return dovizTanimlari;

    }

Answer 1

从您的代码中，您没有关闭GetDovizTurleribySP功能中的连接。我建议您使用using语句来确保即使发生异常也会关闭连接。

它可能看起来像这样

public static List<string> GetDovizTurleribySP()
{
  string connString = System.Configuration.ConfigurationManager.ConnectionStrings["LocalSqlServer1"].ConnectionString;

  using (SqlConnection sqlConn = new SqlConnection(connString))
  {
    sqlConn.Open();

    List<string> dovizTanimlari = new List<string>();

    string commandGetDovizTanimlari = "EXEC GetDovizTanimlari";
    SqlCommand cmd;
    cmd = new SqlCommand(commandGetDovizTanimlari, sqlConn);

    using (var reader = cmd.ExecuteReader())
    {
      while (reader.Read())
      {
        dovizTanimlari.Add(reader.GetString(0));
      }

    }
    return dovizTanimlari;
  }
}

Answer 2

在看到你的代码之后我想指出的两件事情，将sqlCommand，DataReader和sqlConnection包装在using语句中（是的嵌套使用语句），当你创建List时，你不必再调用clear（）列表应该已经初始化为emtpy（至少我认为是在c＃中）。

Answer 3

测试和测试：

Close(); 
Dispose(); 
SqlConnection.ClearPool(connection); 
SqlConnection.ClearAllPools();

使用表达式，最后我发现每个OpenConnection的“Open Pools”问题没有重用“Pool”维护（AWAITING COMMAND）导致ASP.NET客户端应用程序饱和（唯一的方法是重启要发布的IIS），我意识到这是对.config中的连接字符串的调用：

*System.Configuration.ConfigurationManager.ConnectionStrings ["ConnectionSQL"] ConnectionString.;*

显然他调用外部程序集，导致连接字符串或散列“差异”。

<强>解决方案：

我把议会加起来了：

System.Configuration"** and replacement implicitly invoking: ConfigurationManager.ConnectionStrings ["ConnectionSQL"] ConnectionString;

这解决了问题，每个“Open（）”都没有执行“Pools”。

超时已过期

3 个答案: