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1 office 1 //
2 // System.Data.Common.DbParameter.cs
3 //
4 // Author:
5 // Tim Coleman (tim@timcoleman.com)
6 //
7 // Copyright (C) Tim Coleman, 2003
8 //
9  
10 //
11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
12 //
13 // Permission is hereby granted, free of charge, to any person obtaining
14 // a copy of this software and associated documentation files (the
15 // "Software"), to deal in the Software without restriction, including
16 // without limitation the rights to use, copy, modify, merge, publish,
17 // distribute, sublicense, and/or sell copies of the Software, and to
18 // permit persons to whom the Software is furnished to do so, subject to
19 // the following conditions:
20 //
21 // The above copyright notice and this permission notice shall be
22 // included in all copies or substantial portions of the Software.
23 //
24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 //
32  
33  
34 using System.Collections.Generic ;
35 using System.ComponentModel;
36  
37 namespace System.Data.Common {
38 public abstract class DbParameter : IDbDataParameter, IDataParameter
39 {
40 #region Constructors
41 internal static Dictionary<DbType, Type> dbTypeMapping;
42 protected DbParameter ()
43 {
44 }
45  
46 #endregion // Constructors
47  
48 #region Properties
49 #if !(WINDOWS_PHONE || NETFX_CORE)
50 [Browsable (false)]
51 #endif
52 public abstract DbType DbType { get; set; }
53  
54 [DefaultValue (ParameterDirection.Input)]
55 public abstract ParameterDirection Direction { get; set; }
56  
57 [DefaultValue ("")]
58 public abstract string ParameterName { get; set; }
59 public abstract int Size { get; set; }
60 byte IDbDataParameter.Precision {
61 get { return 0; }
62 set {}
63 }
64 byte IDbDataParameter.Scale {
65 get { return 0; }
66 set {}
67 }
68  
69 [DefaultValue (null)]
70 public abstract object Value { get; set; }
71 #if !(WINDOWS_PHONE || NETFX_CORE)
72 [Browsable (false)]
73 #endif
74 [EditorBrowsable (EditorBrowsableState.Never)]
75 public abstract bool IsNullable { get; set; }
76  
77 [DefaultValue ("")]
78 public abstract string SourceColumn { get; set; }
79  
80 [DefaultValue (false)]
81 [EditorBrowsable (EditorBrowsableState.Advanced)]
82 public abstract bool SourceColumnNullMapping { get; set; }
83  
84 //[DefaultValue (DataRowVersion.Current)]
85 //public abstract DataRowVersion SourceVersion { get; set; }
86  
87 #endregion // Properties
88  
89 #region Methods
90 [EditorBrowsable (EditorBrowsableState.Advanced)]
91 public abstract void ResetDbType ();
92  
93 internal virtual object FrameworkDbType {
94 get {return null;}
95 set {}
96 }
97  
98 internal protected static Dictionary<DbType, Type> DbTypeMapping
99 {
100 get { return dbTypeMapping;}
101 set { dbTypeMapping = value;}
102 }
103  
104 // LAMESPEC: Implementors should populate the dbTypeMapping accordingly
105 internal virtual Type SystemType {
106 get {
107 return (Type) dbTypeMapping [DbType];
108 }
109 }
110 #endregion // Methods
111 }
112 }
113  
114