我尝试在MySql
在表上运行SELECT
和我得到这个错误:连接太多异常
Server Error in '/MyApp' Application.
Too many connections
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: MySql.Data.MySqlClient.MySqlException: Too many connections
源错误:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
堆栈跟踪:
[MySqlException (0x80004005): Too many connections] MySql.Data.MySqlClient.MySqlStream.ReadPacket() +517 MySql.Data.MySqlClient.NativeDriver.Open() +702 MySql.Data.MySqlClient.Driver.Open() +245 MySql.Data.MySqlClient.Driver.Create(MySqlConnectionStringBuilder settings) +297 MySql.Data.MySqlClient.MySqlPool.CreateNewPooledConnection() +18 MySql.Data.MySqlClient.MySqlPool.GetPooledConnection() +403 MySql.Data.MySqlClient.MySqlPool.TryToGetDriver() +228 MySql.Data.MySqlClient.MySqlPool.GetConnection() +106 MySql.Data.MySqlClient.MySqlConnection.Open() +1468
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1
我用.net和C#在iis上运行它。 任何想法如何我可以解决这个问题?
编辑
我从我的服务器中添加一些代码:
例如,这是我如何做选择:
MySqlDataReader msdr;
MySqlConnection connect = new MySqlConnection(connectionStringMySql);
MySqlCommand cmd = new MySqlCommand();
string commandLine = "SELECT * FROM Table WHERE active=1";
commandLine = commandLine.Remove(commandLine.Length - 3);
cmd.CommandText = commandLine;
cmd.Connection = connect;
cmd.Connection.Open();
msdr = cmd.ExecuteReader();
while (msdr.Read())
{
//Read data
}
msdr.Close();
cmd.Connection.Close();
这是我如何删除:
MySqlConnection connect = new MySqlConnection(connectionStringMySql);
MySqlCommand cmd = new MySqlCommand();
cmd.Connection = connect;
cmd.Connection.Open();
string commandLine = @"DELETE FROM Table WHERE [email protected];";
cmd.CommandText = commandLine;
cmd.Parameters.AddWithValue("@id", slotId);
cmd.ExecuteNonQuery();
cmd.Connection.Close();
这是我如何插入:
MySqlConnection connect = new MySqlConnection(connectionStringMySql);
MySqlCommand cmd = new MySqlCommand();
cmd.Connection = connect;
cmd.Connection.Open();
string commandLine = @"INSERT INTO Table (id, weekday, start, end) VALUES" +
"(@ id, @weekday, @start, @end);";
cmd.CommandText = commandLine;
cmd.Parameters.AddWithValue("@ id", item.babysitterid);
cmd.Parameters.AddWithValue("@weekday", item.weekday);
cmd.Parameters.AddWithValue("@start", new TimeSpan(item.starthour, item.startmin, 0));
cmd.Parameters.AddWithValue("@end", new TimeSpan(item.endhour, item.endmin, 0));
cmd.ExecuteNonQuery();
long id = cmd.LastInsertedId;
cmd.Connection.Close();
return id;
你在连接中使用using语句吗? – Steve
可能您应该在MySql目录中的my.ini文件中增加max_connections变量。不要忘记在更改变量之前关闭MySql(cmd-> net stop mysql)。 – Baurzhan