SqlHelper类

             Public Shared Function GetCachedParameters(ByVal cacheKey As String) As SqlParameter()
              Dim cachedParms As SqlParameter() = CType(parmCache(cacheKey), SqlParameter())
              If cachedParms Is Nothing Then Return Nothing
              Dim clonedParms(cachedParms.Length - 1) As SqlParameter
              Dim i As Integer
              For i = 0 To cachedParms.Length - 1
                  clonedParms(i) = CType(CType(cachedParms(i), ICloneable).Clone(), SqlParameter)
              Next
              Return clonedParms
          End Function
          ''' <summary>
          '''
          ''' </summary>
          ''' <param name="cmd"></param>
          ''' <param name="conn"></param>
          ''' <param name="trans"></param>
          ''' <param name="cmdType"></param>
          ''' <param name="cmdText"></param>
          ''' <param name="cmdParms"></param>
          ''' <remarks></remarks>
          Private Shared Sub PrepareCommand(ByVal cmd As SqlCommand, ByVal conn As SqlConnection, ByVal trans As SqlTransaction, ByVal cmdType As CommandType, ByVal cmdText As String, ByVal cmdParms As SqlParameter())
              If conn.State <> ConnectionState.Open Then conn.Open()
              cmd.Connection = conn
              cmd.CommandText = cmdText
              If trans IsNot Nothing Then cmd.Transaction = trans
              cmd.CommandType = cmdType
              If cmdParms IsNot Nothing Then
                  Dim parm As SqlParameter
                  For Each parm In cmdParms
                      cmd.Parameters.Add(parm)
                  Next
              End If
          End Sub
      End Class

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