mysql
connector: .net
var r = cmd.ExecuteReader()
r.Reader() // <--长时间不停调用
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
解决办法有2个
1. 写ConnectString:
server=127.0.0.1;User Id=reader;database=uni_chn_f_cffex_if_201005_r;Allow User Variables=True;pooling=True;Connect Timeout=3;Default Command Timeout=10
Connect Timeout = 3 表示连接数据库3秒超时
Default Command Timeout = 10 表示 Command的执行时间为10秒,之后超时
所以根据需要设置这个 Default Command Timeout
2. 设置
command.CommandTimeout = int.MaxValue;
注意,此设置必须在 cmd.ExecuteReader() 这条语句的前面
否则是无效的!
来源:http://*.com/questions/4315701/c-sharp-mysql-connection-timeout-on-query-on-large-table