SqlCommand.ExecuteScalar Cancel

Question

有什么方法可以异步执行SqlCommand.ExecuteScalar() ，然后在执行时将其取消（以及在服务器端）？

Answer 1

.NET Framework 4.5 has a ExecuteScalarAsync() method.
See here: http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.executescalarasync(v=vs.110).aspx

ExecuteScalarAsync() also has an overload with a CancellationToken parameter that can be used to abandon the operation before the command timeout elapses.