在vb.net中调用存储过程和存储函数

Question

我在mysql中创建了一个存储过程

 CREATE DEFINER=`sqladmin`@`%` PROCEDURE `sp_GetContainerPath`(IN P_ContainerId INT,
                                    OUT P_ContainerPath VARCHAR (255))
 Begin
   SELECT sf_GetContainerPath(P_ContainerId)
 INTO P_ContainerPath; END

此过程提供了来自containerPath的所有路径。现在我在vb.net中创建应用程序，当我按下按钮，然后我可以通过此过程获取所有containerPath。

Friend Function getContainerpath(ByVal containerId As Integer) As DataSet
    Try
        Dim dbh As New DatabaseHandler
        Dim ds As DataSet
        Dim inParams As New Hashtable
        Dim outParams As New Hashtable

        inParams.Add("P_ContainerId", containerId)
        outParams.add("P_ContainerPath", Nothing)
        ds = dbh.callPro2("sp_GetContainerPath", inParams, outParams)


        Return ds

    Catch ex As Exception
        logException("getContainerpath", ex.Message)
        Throw
    End Try
End Function
Private Sub GetContainerButton_Click(ByVal containerid, sender As System.Object, e As System.EventArgs) Handles GetContainerButton.Click         end sub

   Friend Sub callProc2(ByVal procName As String, ByVal inParams As Hashtable, ByRef outParams As Hashtable, _
                     Optional ByRef inoutParams As Hashtable = Nothing)
    logQuery("callProc2", procName, inParams, inoutParams)
    Dim elapsedTicks As Long
    Dim elapsedSpan As New TimeSpan(elapsedTicks)
    elapsedTicks = Date.Now.Ticks
    Try
        If Not inParams.Contains("P_UserId") Then
            inParams.Add("P_UserId", ConfigurationHandler.UserId)
        End If
        If Not inParams.Contains("P_MachineId") Then
            inParams.Add("P_MachineId", ConfigurationHandler.machineId)
        End If
        If Not inParams.Contains("P_ApplicationId") Then
            inParams.Add("P_ApplicationId", ConfigurationHandler.applicationId)
        End If

        'Do the actual query
        '
        Select Case UCase(_dbType)
            Case "MYSQL"
                callSQLProc(procName, inParams, outParams, inoutParams)
            Case "XML"
                _xmlDatabase.callXMLProc(procName, inParams, outParams, inoutParams)
            Case Else
                Throw New Exception("INVALID_DATABASE_TYPE")
        End Select

    Catch ex As Exception                                   'generic .net error
        logException("callProc2", ex.Message)
        Throw
    Finally
        logResult("callProc2", procName, outParams, inoutParams)
        elapsedSpan = New TimeSpan(Date.Now.Ticks - elapsedTicks)
        logVerbose("DatabaseHandler:callProc2[" & procName & "]-Elapsed: " & elapsedSpan.ToString)
    End Try
End Sub

这是我编写的一段vb代码，用于从存储过程中获取路径。但它没有运行。有人帮忙吗？欢呼声