Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / Common / DataTableMapping.cs / 1 / DataTableMapping.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Data; using System.Diagnostics; using System.Globalization; using System.Reflection; [ System.ComponentModel.TypeConverterAttribute(typeof(System.Data.Common.DataTableMapping.DataTableMappingConverter)) ] #if WINFSInternalOnly internal #else public #endif sealed class DataTableMapping : MarshalByRefObject, ITableMapping, ICloneable { private DataTableMappingCollection parent; private DataColumnMappingCollection _columnMappings; private string _dataSetTableName; private string _sourceTableName; public DataTableMapping() { } public DataTableMapping(string sourceTable, string dataSetTable) { SourceTable = sourceTable; DataSetTable = dataSetTable; } public DataTableMapping(string sourceTable, string dataSetTable, DataColumnMapping[] columnMappings) { SourceTable = sourceTable; DataSetTable = dataSetTable; if ((null != columnMappings) && (0 < columnMappings.Length)) { ColumnMappings.AddRange(columnMappings); } } // explict ITableMapping implementation IColumnMappingCollection ITableMapping.ColumnMappings { get { return ColumnMappings; } } [ DesignerSerializationVisibility(DesignerSerializationVisibility.Content), ResCategoryAttribute(Res.DataCategory_Mapping), ResDescriptionAttribute(Res.DataTableMapping_ColumnMappings), ] public DataColumnMappingCollection ColumnMappings { get { DataColumnMappingCollection columnMappings = _columnMappings; if (null == columnMappings) { columnMappings = new DataColumnMappingCollection(); _columnMappings = columnMappings; } return columnMappings; } } [ DefaultValue(""), ResCategoryAttribute(Res.DataCategory_Mapping), ResDescriptionAttribute(Res.DataTableMapping_DataSetTable), ] public string DataSetTable { get { string dataSetTableName = _dataSetTableName; return ((null != dataSetTableName) ? dataSetTableName : ADP.StrEmpty); } set { _dataSetTableName = value; } } internal DataTableMappingCollection Parent { get { return parent; } set { parent = value; } } [ DefaultValue(""), ResCategoryAttribute(Res.DataCategory_Mapping), ResDescriptionAttribute(Res.DataTableMapping_SourceTable), ] public string SourceTable { get { string sourceTableName = _sourceTableName; return ((null != sourceTableName) ? sourceTableName : ADP.StrEmpty); } set { if ((null != Parent) && (0 != ADP.SrcCompare(_sourceTableName, value))) { Parent.ValidateSourceTable(-1, value); } _sourceTableName = value; } } object ICloneable.Clone() { DataTableMapping clone = new DataTableMapping(); // MDAC 81448 clone._dataSetTableName = _dataSetTableName; clone._sourceTableName = _sourceTableName; if ((null != _columnMappings) && (0 < ColumnMappings.Count)) { DataColumnMappingCollection parameters = clone.ColumnMappings; foreach(ICloneable parameter in ColumnMappings) { parameters.Add(parameter.Clone()); } } return clone; } [ EditorBrowsableAttribute(EditorBrowsableState.Advanced) ] // MDAC 69508 public DataColumn GetDataColumn(string sourceColumn, Type dataType, DataTable dataTable, MissingMappingAction mappingAction, MissingSchemaAction schemaAction) { return DataColumnMappingCollection.GetDataColumn(_columnMappings, sourceColumn, dataType, dataTable, mappingAction, schemaAction); } [ EditorBrowsableAttribute(EditorBrowsableState.Advanced) ] // MDAC 69508 public DataColumnMapping GetColumnMappingBySchemaAction(string sourceColumn, MissingMappingAction mappingAction) { return DataColumnMappingCollection.GetColumnMappingBySchemaAction(_columnMappings, sourceColumn, mappingAction); } [ EditorBrowsableAttribute(EditorBrowsableState.Advanced) ] // MDAC 69508 public DataTable GetDataTableBySchemaAction(DataSet dataSet, MissingSchemaAction schemaAction) { if (null == dataSet) { throw ADP.ArgumentNull("dataSet"); } string dataSetTable = DataSetTable; if (ADP.IsEmpty(dataSetTable)) { #if DEBUG if (AdapterSwitches.DataSchema.TraceWarning) { Debug.WriteLine("explicit filtering of SourceTable \"" + SourceTable + "\""); } #endif return null; } DataTableCollection tables = dataSet.Tables; int index = tables.IndexOf(dataSetTable); if ((0 <= index) && (index < tables.Count)) { #if DEBUG if (AdapterSwitches.DataSchema.TraceInfo) { Debug.WriteLine("schema match on DataTable \"" + dataSetTable); } #endif return tables[index]; } switch (schemaAction) { case MissingSchemaAction.Add: case MissingSchemaAction.AddWithKey: #if DEBUG if (AdapterSwitches.DataSchema.TraceInfo) { Debug.WriteLine("schema add of DataTable \"" + dataSetTable + "\""); } #endif return new DataTable(dataSetTable); case MissingSchemaAction.Ignore: #if DEBUG if (AdapterSwitches.DataSchema.TraceWarning) { Debug.WriteLine("schema filter of DataTable \"" + dataSetTable + "\""); } #endif return null; case MissingSchemaAction.Error: #if DEBUG if (AdapterSwitches.DataSchema.TraceError) { Debug.WriteLine("schema error on DataTable \"" + dataSetTable + "\""); } #endif throw ADP.MissingTableSchema(dataSetTable, SourceTable); } throw ADP.InvalidMissingSchemaAction(schemaAction); } public override String ToString() { return SourceTable; } sealed internal class DataTableMappingConverter : System.ComponentModel.ExpandableObjectConverter { // converter classes should have public ctor public DataTableMappingConverter() { } override public bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if (typeof(InstanceDescriptor) == destinationType) { return true; } return base.CanConvertTo(context, destinationType); } override public object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (null == destinationType) { throw ADP.ArgumentNull("destinationType"); } if ((typeof(InstanceDescriptor) == destinationType) && (value is DataTableMapping)) { DataTableMapping mapping = (DataTableMapping)value; DataColumnMapping[] columnMappings = new DataColumnMapping[mapping.ColumnMappings.Count]; mapping.ColumnMappings.CopyTo(columnMappings, 0); object[] values = new object[] { mapping.SourceTable, mapping.DataSetTable, columnMappings}; Type[] types = new Type[] { typeof(string), typeof(string), typeof(DataColumnMapping[]) }; ConstructorInfo ctor = typeof(DataTableMapping).GetConstructor(types); return new InstanceDescriptor(ctor, values); } return base.ConvertTo(context, culture, value, destinationType); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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