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我不太确定为什么我得到这个错误。BC3016:变量'myConnection'在封闭块中隐藏一个变量
Dim numUsers as Integer
Using myConnection as New System.Data.SqlClient.SqlConnection("Data Source=(local);InitialCatalog=dbtest;Integrated Security=True")
Dim queryString As String = "SELECT COUNT(*) AS Num_Of_User FROM tblusers WHERE [email protected] AND [email protected]"
Using myCommand as New System.Data.SqlClient.SqlCommand(queryString, myConnection)
myConnection.Open
myCommand.Parameters.AddWithValue("@username", requestName)
myCommand.Parameters.AddWithValue("@password", requestPass)
numUsers = myCommand.ExecuteScalar()
End Using
End Using
第一个使用状态时发生此错误。任何人都可以解决这个问题
你可以发布封闭块吗?你可能在那里定义了另一个名为“myConnection”的变量。 – 2010-07-16 20:39:35