如何在ASP.NET MVC3应用程序中强制Npgsql使用连接字符串中的CommandTimeout值

ASP.NET MVC3应用程序使用npgsql 2.0.12.0通过mod_Mono在Mono中获取数据。 有时会出现以下超时异常。如果发生异常，请求持续时间为31秒

使用将连接字符串中的CommandTimeout设置为5分钟

        NpgsqlConnectionStringBuilder csb = new NpgsqlConnectionStringBuilder()
        {
            CommandTimeout = 5*60,  // 5 min
            Host = Config.Server,
            Database = Config.DefaultDataBase,
            UserName = Config.ServerUser,
            Port = Config.Port,
            SslMode = SslMode.Prefer,
            SSL = true,
        };

如何强制npgsql使用超时5分钟，并且在31秒后不抛出excpetion？ 在postgresql.con文件语句中，没有设置超时，所以看起来这不是来自服务器

使用ExecuteReader执行查询：

        using (IDbConnection conn = DataAccessBase.CreateConnection())
        using (IDbCommand cmd = conn.CreateCommand())
        {
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = string.Format(command, paramNames);
            conn.Open();
            using (var reader = cmd.ExecuteReader(CommandBehavior.CloseConnection | CommandBehavior.SingleResult))
            {
                if (reader.Read())
                {
                    string[] names = new string[reader.FieldCount];
                    for (int i = 0; i < names.Length; i++)
                    {
                        names[i] = reader.GetName(i);
                    }
                    Func<IDataRecord, MyDataContext, T> objInit = InitializerCache<T>.GetInitializer(names, ConvertValue != null);
                    do
                    { // walk the data 
                        yield return objInit(reader, this);
                    } while (reader.Read());
                }
                while (reader.NextResult()) { } // ensure any trailing errors caught 
            }
        }

例外情况：

Npgsql.NpgsqlException:
A timeout has occured. If you were establishing a connection, increase Timeout value in ConnectionString. If you were executing a command, increase the CommandTimeout value in ConnectionString or in your NpgsqlCommand object.
  at Npgsql.NpgsqlState.ProcessBackendResponsesEnum (Npgsql.NpgsqlConnector context) [0x00000] in <filename unknown>:0 
  at Npgsql.NpgsqlReadyState.QueryEnum (Npgsql.NpgsqlConnector context, Npgsql.NpgsqlCommand command) [0x00000] in <filename unknown>:0 
  at Npgsql.NpgsqlConnector.QueryEnum (Npgsql.NpgsqlCommand queryCommand) [0x00000] in <filename unknown>:0 
  at Npgsql.NpgsqlCommand.GetReader (CommandBehavior cb) [0x00000] in <filename unknown>:0 
  at Npgsql.NpgsqlCommand.ExecuteReader (CommandBehavior cb) [0x00000] in <filename unknown>:0 

---

抱歉，但我认为您的命令时间不正确：

CommandTimeout=5*60，//5分钟

---

它是30秒300毫秒。

npgsql源代码和文档包含等待命令执行的时间（以秒为单位），也包括单元测试TimeoutFirstParameters将值设置为1并调用pg_sleep1.5并验证是否发生超时异常。这是以秒为单位的。为什么你认为这是以毫秒为单位的？我错了，这是以秒为单位的时间。我已经在文档中澄清了。而且，值得一提的是，300毫秒不是30秒。0.3秒。一秒钟有1000毫秒。您可以尝试设置调用ExecuteReader的命令超时吗？如果有效，它将确认将commandtimeout从connectionstring向下传递到NpgsqlCommand对象时出现问题。提前谢谢。我想我有一个类似的问题：这是NpgSQL错误吗？

Npgsql.NpgsqlException:
A timeout has occured. If you were establishing a connection, increase Timeout value in ConnectionString. If you were executing a command, increase the CommandTimeout value in ConnectionString or in your NpgsqlCommand object.
  at Npgsql.NpgsqlState.ProcessBackendResponsesEnum (Npgsql.NpgsqlConnector context) [0x00000] in <filename unknown>:0 
  at Npgsql.NpgsqlReadyState.QueryEnum (Npgsql.NpgsqlConnector context, Npgsql.NpgsqlCommand command) [0x00000] in <filename unknown>:0 
  at Npgsql.NpgsqlConnector.QueryEnum (Npgsql.NpgsqlCommand queryCommand) [0x00000] in <filename unknown>:0 
  at Npgsql.NpgsqlCommand.GetReader (CommandBehavior cb) [0x00000] in <filename unknown>:0 
  at Npgsql.NpgsqlCommand.ExecuteReader (CommandBehavior cb) [0x00000] in <filename unknown>:0