cmd.Connection.State什么意思

Namespace DataProvider

Public Class DataProvider
'更新
Public Shared Function ExecNonQuery(ByVal cmd As SqlCommand) As Integer

Try

If cmd.Connection.State <> ConnectionState.Open Then

cmd.Connection.Open()

End If

Return cmd.ExecuteNonQuery()
go()
Catch ex As Exception
Throw ex

Finally

If cmd.Connection.State = ConnectionState.Open Then

cmd.Connection.Close()

End If

End Try
End Function
那为朋友 有时间的话 能帮我一句一句 解释出来 每一条语句的意思吗? 我只知道大概的意思 比如 Namespace DataProvider
(定义一个DataProbider的命名空间) 孤独的初学者拜师~ 哪个师傅收下小弟