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1 | office | 1 | // |
2 | // System.Data.Common.DbDataReader.cs |
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3 | // |
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4 | // Author: |
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5 | // Tim Coleman (tim@timcoleman.com) |
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6 | // |
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7 | // Copyright (C) Tim Coleman, 2003 |
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8 | // |
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9 | |||
10 | // |
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11 | // Copyright (C) 2004 Novell, Inc (http://www.novell.com) |
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12 | // |
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13 | // Permission is hereby granted, free of charge, to any person obtaining |
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14 | // a copy of this software and associated documentation files (the |
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15 | // "Software"), to deal in the Software without restriction, including |
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16 | // without limitation the rights to use, copy, modify, merge, publish, |
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17 | // distribute, sublicense, and/or sell copies of the Software, and to |
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18 | // permit persons to whom the Software is furnished to do so, subject to |
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19 | // the following conditions: |
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20 | // |
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21 | // The above copyright notice and this permission notice shall be |
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22 | // included in all copies or substantial portions of the Software. |
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23 | // |
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24 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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25 | // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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26 | // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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27 | // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
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28 | // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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29 | // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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30 | // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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31 | // |
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32 | |||
33 | |||
34 | |||
35 | using System.Collections; |
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36 | using System.ComponentModel; |
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37 | using System.Data; |
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38 | |||
39 | namespace System.Data.Common { |
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40 | public abstract class DbDataReader : IDataReader, IDataRecord, IDisposable, IEnumerable |
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41 | { |
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42 | #region Constructors |
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43 | |||
44 | protected DbDataReader () |
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45 | { |
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46 | } |
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47 | |||
48 | #endregion // Constructors |
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49 | |||
50 | #region Properties |
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51 | |||
52 | public abstract int Depth { get; } |
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53 | public abstract int FieldCount { get; } |
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54 | public abstract bool HasRows { get; } |
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55 | public abstract bool IsClosed { get; } |
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56 | public abstract object this [int index] { get; } |
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57 | public abstract object this [string name] { get; } |
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58 | public abstract int RecordsAffected { get; } |
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59 | |||
60 | |||
61 | public virtual int VisibleFieldCount { |
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62 | get { return FieldCount; } |
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63 | } |
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64 | |||
65 | #endregion // Properties |
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66 | |||
67 | #region Methods |
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68 | |||
69 | public abstract void Close (); |
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70 | public abstract bool GetBoolean (int i); |
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71 | public abstract byte GetByte (int i); |
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72 | public abstract long GetBytes (int i, long fieldOffset, byte[] buffer, int bufferOffset, int length); |
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73 | public abstract char GetChar (int i); |
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74 | public abstract long GetChars (int i, long dataIndex, char[] buffer, int bufferIndex, int length); |
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75 | |||
76 | [EditorBrowsable (EditorBrowsableState.Never)] |
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77 | public void Dispose () |
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78 | { |
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79 | Dispose (true); |
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80 | } |
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81 | |||
82 | protected virtual void Dispose (bool disposing) |
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83 | { |
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84 | if (disposing) |
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85 | Close (); |
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86 | } |
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87 | |||
88 | [EditorBrowsable (EditorBrowsableState.Never)] |
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89 | public DbDataReader GetData (int i) |
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90 | { |
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91 | return ((DbDataReader) this [i]); |
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92 | } |
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93 | |||
94 | |||
95 | public abstract string GetDataTypeName (int i); |
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96 | public abstract DateTime GetDateTime (int i); |
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97 | public abstract decimal GetDecimal (int i); |
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98 | public abstract double GetDouble (int i); |
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99 | |||
100 | [EditorBrowsable (EditorBrowsableState.Never)] |
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101 | public abstract IEnumerator GetEnumerator (); |
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102 | |||
103 | public abstract Type GetFieldType (int i); |
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104 | public abstract float GetFloat (int i); |
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105 | public abstract Guid GetGuid (int i); |
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106 | public abstract short GetInt16 (int i); |
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107 | public abstract int GetInt32 (int i); |
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108 | public abstract long GetInt64 (int i); |
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109 | public abstract string GetName (int i); |
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110 | public abstract int GetOrdinal (string name); |
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111 | |||
112 | |||
113 | [EditorBrowsable (EditorBrowsableState.Never)] |
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114 | public virtual Type GetProviderSpecificFieldType (int i) |
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115 | { |
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116 | return GetFieldType (i); |
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117 | } |
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118 | |||
119 | [EditorBrowsable (EditorBrowsableState.Never)] |
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120 | public virtual object GetProviderSpecificValue (int i) |
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121 | { |
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122 | return GetValue (i); |
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123 | } |
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124 | |||
125 | [EditorBrowsable (EditorBrowsableState.Never)] |
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126 | public virtual int GetProviderSpecificValues (object[] values) |
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127 | { |
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128 | return GetValues (values); |
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129 | } |
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130 | |||
131 | protected virtual DbDataReader GetDbDataReader (int ordinal) |
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132 | { |
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133 | return ((DbDataReader) this [ordinal]); |
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134 | } |
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135 | |||
136 | |||
137 | //public abstract DataTable GetSchemaTable (); |
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138 | public abstract string GetString (int i); |
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139 | public abstract object GetValue (int i); |
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140 | public abstract int GetValues (object[] values); |
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141 | |||
142 | IDataReader IDataRecord.GetData (int i) |
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143 | { |
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144 | return ((IDataReader) this).GetData (i); |
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145 | } |
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146 | |||
147 | public abstract bool IsDBNull (int i); |
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148 | public abstract bool NextResult (); |
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149 | public abstract bool Read (); |
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150 | |||
151 | // internal static DataTable GetSchemaTableTemplate () |
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152 | //{ |
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153 | // Type booleanType = typeof (bool); |
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154 | // Type stringType = typeof (string); |
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155 | // Type intType = typeof (int); |
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156 | // Type typeType = typeof (Type); |
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157 | // Type shortType = typeof (short); |
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158 | |||
159 | // DataTable schemaTable = new DataTable ("SchemaTable"); |
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160 | // schemaTable.Columns.Add ("ColumnName", stringType); |
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161 | // schemaTable.Columns.Add ("ColumnOrdinal", intType); |
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162 | // schemaTable.Columns.Add ("ColumnSize", intType); |
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163 | // schemaTable.Columns.Add ("NumericPrecision", shortType); |
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164 | // schemaTable.Columns.Add ("NumericScale", shortType); |
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165 | // schemaTable.Columns.Add ("IsUnique", booleanType); |
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166 | // schemaTable.Columns.Add ("IsKey", booleanType); |
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167 | // schemaTable.Columns.Add ("BaseServerName", stringType); |
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168 | // schemaTable.Columns.Add ("BaseCatalogName", stringType); |
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169 | // schemaTable.Columns.Add ("BaseColumnName", stringType); |
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170 | // schemaTable.Columns.Add ("BaseSchemaName", stringType); |
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171 | // schemaTable.Columns.Add ("BaseTableName", stringType); |
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172 | // schemaTable.Columns.Add ("DataType", typeType); |
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173 | // schemaTable.Columns.Add ("AllowDBNull", booleanType); |
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174 | // schemaTable.Columns.Add ("ProviderType", intType); |
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175 | // schemaTable.Columns.Add ("IsAliased", booleanType); |
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176 | // schemaTable.Columns.Add ("IsExpression", booleanType); |
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177 | // schemaTable.Columns.Add ("IsIdentity", booleanType); |
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178 | // schemaTable.Columns.Add ("IsAutoIncrement", booleanType); |
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179 | // schemaTable.Columns.Add ("IsRowVersion", booleanType); |
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180 | // schemaTable.Columns.Add ("IsHidden", booleanType); |
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181 | // schemaTable.Columns.Add ("IsLong", booleanType); |
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182 | // schemaTable.Columns.Add ("IsReadOnly", booleanType); |
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183 | |||
184 | // return schemaTable; |
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185 | //} |
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186 | |||
187 | #endregion // Methods |
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188 | } |
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189 | } |
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190 | |||
191 |