2 // System.Data.SqlClient.DbEnumerator.cs
5 // Tim Coleman (tim@timcoleman.com)
7 // Copyright (C) Tim Coleman, 2002
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
;
38 namespace System
.Data
.Common
{
39 public class DbEnumerator
: IEnumerator
46 FieldNameLookup lookup
;
53 public DbEnumerator (IDataReader reader
)
54 : this (reader
, false)
58 public DbEnumerator (IDataReader reader
, bool closeReader
)
61 this.closeReader
= closeReader
;
62 this.lookup
= new FieldNameLookup ();
63 this.fieldCount
= reader
.FieldCount
;
64 LoadSchema (reader
.GetSchemaTable ());
67 #endregion // Constructors
71 public object Current
{
73 object[] values
= new object[fieldCount
];
74 reader
.GetValues (values
);
75 return new DbDataRecord (schema
, values
, lookup
);
79 #endregion // Properties
83 private void LoadSchema (DataTable schemaTable
)
85 schema
= new SchemaInfo
[fieldCount
];
87 foreach (DataRow row
in schemaTable
.Rows
) {
88 SchemaInfo columnSchema
= new SchemaInfo ();
90 lookup
.Add ((string) row
["ColumnName"]);
92 columnSchema
.AllowDBNull
= (bool) row
["AllowDBNull"];
93 columnSchema
.ColumnName
= row
["ColumnName"].ToString ();
94 columnSchema
.ColumnOrdinal
= (int) row
["ColumnOrdinal"];
95 columnSchema
.ColumnSize
= (int) row
["ColumnSize"];
96 columnSchema
.DataTypeName
= reader
.GetDataTypeName (index
);
97 columnSchema
.FieldType
= reader
.GetFieldType (index
);
98 columnSchema
.IsReadOnly
= (bool) row
["IsReadOnly"];
99 columnSchema
.TableName
= row
["BaseTableName"].ToString ();
101 if (row
["NumericPrecision"] != DBNull
.Value
)
102 columnSchema
.NumericPrecision
= Convert
.ToByte (row
["NumericPrecision"]);
104 columnSchema
.NumericPrecision
= Convert
.ToByte (0);
106 if (row
["NumericScale"] != DBNull
.Value
)
107 columnSchema
.NumericScale
= Convert
.ToByte (row
["NumericScale"]);
109 columnSchema
.NumericScale
= Convert
.ToByte (0);
111 schema
[index
] = columnSchema
;
116 public bool MoveNext ()
125 [EditorBrowsable (EditorBrowsableState
.Never
)]
128 throw new NotSupportedException ();
131 #endregion // Methods