mcs/class/referencesource/System.Data/System/Data/SqlClient/TdsParameterSetter.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="TdsParameterSetter.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">Microsoft</owner>
   6 // <owner current="true" primary="false">Microsoft</owner>
   7 // <owner current="true" primary="false">Microsoft</owner>
   8 //------------------------------------------------------------------------------
   9
  10 namespace System.Data.SqlClient {
  11     using System;
  12     using System.Data;
  13     using System.Data.SqlTypes;
  14     using System.Diagnostics;
  15
  16     using Microsoft.SqlServer.Server;
  17
  18     // Simple Getter/Setter for structured parameters to allow using common ValueUtilsSmi code.
  19     //  This is a stand-in to having a true SmiRequestExecutor class for TDS.
  20     internal class TdsParameterSetter : SmiTypedGetterSetter {
  21
  22         #region Private fields
  23
  24         private TdsRecordBufferSetter _target;
  25
  26         #endregion
  27
  28         #region ctor & control
  29
  30         internal TdsParameterSetter(TdsParserStateObject stateObj, SmiMetaData md) {
  31             _target = new TdsRecordBufferSetter(stateObj, md);
  32         }
  33
  34         #endregion
  35
  36         #region TypedGetterSetter overrides
  37         // Are calls to Get methods allowed?
  38         internal override bool CanGet {
  39             get {
  40                 return false;
  41             }
  42         }
  43
  44         // Are calls to Set methods allowed?
  45         internal override bool CanSet {
  46             get {
  47                 return true;
  48             }
  49         }
  50
  51         // valid for structured types
  52         //  This method called for both get and set.
  53         internal override SmiTypedGetterSetter GetTypedGetterSetter(SmiEventSink sink, int ordinal) {
  54             Debug.Assert(0==ordinal, "TdsParameterSetter only supports 0 for ordinal.  Actual = " + ordinal);
  55             return _target;
  56         }
  57
  58         // Set value to null
  59         //  valid for all types
  60         public override void SetDBNull(SmiEventSink sink, int ordinal) {
  61             Debug.Assert(0==ordinal, "TdsParameterSetter only supports 0 for ordinal.  Actual = " + ordinal);
  62
  63             _target.EndElements(sink);
  64         }
  65
  66         #endregion
  67     }
  68 }