mcs/class/referencesource/System.Data/System/Data/Common/NameValuePair.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="NameValuePair.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 //------------------------------------------------------------------------------
   8
   9 namespace System.Data.Common {
  10
  11     using System;
  12     using System.Data.Common;
  13     using System.Diagnostics;
  14     using System.Runtime.Serialization;
  15
  16     [Serializable] // MDAC 83147
  17     sealed internal class NameValuePair {
  18         readonly private string _name;
  19         readonly private string _value;
  20         [OptionalField(VersionAdded=2)]
  21         readonly private int _length;
  22         private NameValuePair _next;
  23
  24         internal NameValuePair(string name, string value, int length) {
  25             System.Diagnostics.Debug.Assert(!ADP.IsEmpty(name), "empty keyname");
  26             _name = name;
  27             _value = value;
  28             _length = length;
  29         }
  30
  31         internal int Length {
  32             get {
  33                 // this property won't exist when deserialized from Everett to Whidbey
  34                 // it shouldn't matter for DbConnectionString/DbDataPermission
  35                 // which should only use Length during construction
  36                 // not deserialization or post-ctor runtime
  37                 Debug.Assert(0 < _length, "NameValuePair zero Length usage");
  38                 return _length;
  39             }
  40         }
  41         internal string Name {
  42             get {
  43                 return _name;
  44             }
  45         }
  46         internal NameValuePair Next {
  47             get {
  48                 return _next;
  49             }
  50             set {
  51                 if ((null != _next) || (null == value)) {
  52                     throw ADP.InternalError(ADP.InternalErrorCode.NameValuePairNext);
  53                 }
  54                 _next = value;
  55             }
  56         }
  57         internal string Value {
  58             get {
  59                 return _value;
  60             }
  61         }
  62     }
  63 }