MySQL中的连接错误太多

Question

i Have one C# desktop application that connects mysql database sever. The applicaiton runs well but after some time or some days it gives an exception like:

9/16/2013 12:56:55 PM: 9/16/2013 12:56:55 PM: Exception Occurred. Too many    
connections.StackTrace:    at MySql.Data.MySqlClient.MySqlStream.OpenPacket()
at MySql.Data.MySqlClient.NativeDriver.Authenticate411()
at MySql.Data.MySqlClient.NativeDriver.Authenticate()
at MySql.Data.MySqlClient.NativeDriver.Open()
at MySql.Data.MySqlClient.MySqlConnection.Open()
at ReckonHelper.MySqlDatabaseConnection.ConnectDB().

I don't know why it is being happen??

Any Solution For this?

Answer 1

1. Close the connection once you have complated the execution of SQL statements.

2. Use try..catch..finally

     try { ....... con.Open(); //execute sql statement } catch (Exception ex) { throw ex; //throw or dispaly your exception } finally { con.close; } 

3. Add the pooling attributes in your connection string
   "Server=servername;Port=3306;Database=dbname; Uid=username;Pwd=password;pooling=true;Allow Zero Datetime=True;Min Pool Size=5; Max Pool Size=100;"