2 // System.Data.Common.DbParameter.cs
5 // Tim Coleman (tim@timcoleman.com)
7 // Copyright (C) Tim Coleman, 2003
11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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:
21 // The above copyright notice and this permission notice shall be
22 // included in all copies or substantial portions of the Software.
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.
34 using System.Collections;
35 using System.ComponentModel;
37 namespace System.Data.Common {
38 public abstract class DbParameter : MarshalByRefObject, IDbDataParameter, IDataParameter
41 internal static Hashtable dbTypeMapping;
42 protected DbParameter ()
46 #endregion // Constructors
51 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
52 [RefreshProperties (RefreshProperties.All)]
53 public abstract DbType DbType { get; set; }
55 [DefaultValue (ParameterDirection.Input)]
56 [RefreshProperties (RefreshProperties.All)]
57 public abstract ParameterDirection Direction { get; set; }
60 public abstract string ParameterName { get; set; }
61 public abstract int Size { get; set; }
62 byte IDbDataParameter.Precision {
66 byte IDbDataParameter.Scale {
72 [RefreshProperties (RefreshProperties.All)]
73 public abstract object Value { get; set; }
77 [EditorBrowsable (EditorBrowsableState.Never)]
78 public abstract bool IsNullable { get; set; }
81 public abstract string SourceColumn { get; set; }
83 [RefreshProperties (RefreshProperties.All)]
84 [DefaultValue (false)]
85 [EditorBrowsable (EditorBrowsableState.Advanced)]
86 public abstract bool SourceColumnNullMapping { get; set; }
88 [DefaultValue (DataRowVersion.Current)]
89 public abstract DataRowVersion SourceVersion { get; set; }
91 #endregion // Properties
94 [EditorBrowsable (EditorBrowsableState.Advanced)]
95 public abstract void ResetDbType ();
97 internal virtual object FrameworkDbType {
102 internal static Hashtable DbTypeMapping {
103 get { return dbTypeMapping;}
104 set { dbTypeMapping = value;}
107 // LAMESPEC: Implementors should populate the dbTypeMapping accordingly
108 internal virtual Type SystemType {
110 return (Type) dbTypeMapping [DbType];
113 #endregion // Methods