Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / System / data / design / DataDesignUtil.cs / 1 / DataDesignUtil.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All Rights Reserved. // Information Contained Herein is Proprietary and Confidential. // //----------------------------------------------------------------------------- /* */ namespace System.Data.Design { using System; using System.Text; using System.Data; using System.Data.Common; using System.Data.OleDb; using System.Data.SqlClient; using System.Collections; using System.Diagnostics; using System.Globalization; using System.Windows.Forms; using System.ComponentModel; using System.ComponentModel.Design; ////// This class provides the data class designer specific utilities /// internal sealed class DataDesignUtil { internal static string DataSetClassName = typeof(DataSet).ToString(); // private constructor to avoid class being instantiated. private DataDesignUtil() { } internal enum MappingDirection { SourceToDataSet, DataSetToSource } internal static string[] MapColumnNames( DataColumnMappingCollection mappingCollection, string[] names, MappingDirection direction ) { Debug.Assert( mappingCollection != null ); Debug.Assert( names != null ); if( mappingCollection == null || names == null ) { return new string[] {}; } ArrayList result = new ArrayList(); string mappedName; DataColumnMapping mapping; foreach( string columnName in names ) { try { if( direction == MappingDirection.DataSetToSource ) { mapping = mappingCollection.GetByDataSetColumn( columnName ); mappedName = mapping.SourceColumn; } else { mapping = mappingCollection[columnName]; mappedName = mapping.DataSetColumn; } } catch( System.IndexOutOfRangeException ) { mappedName = columnName; } Debug.Assert( StringUtil.NotEmptyAfterTrim(mappedName) ); result.Add( mappedName ); } return (string[]) result.ToArray( typeof(string) ); } // CopyColumn -- Copy column members from src to dest. public static void CopyColumn(DataColumn srcColumn, DataColumn destColumn){ destColumn.AllowDBNull = srcColumn.AllowDBNull; destColumn.AutoIncrement = srcColumn.AutoIncrement; destColumn.AutoIncrementSeed = srcColumn.AutoIncrementSeed; destColumn.AutoIncrementStep = srcColumn.AutoIncrementStep; destColumn.Caption = srcColumn.Caption; destColumn.ColumnMapping = srcColumn.ColumnMapping; destColumn.ColumnName = srcColumn.ColumnName; destColumn.DataType = srcColumn.DataType; destColumn.DefaultValue = srcColumn.DefaultValue; destColumn.Expression = srcColumn.Expression; destColumn.MaxLength = srcColumn.MaxLength; destColumn.Prefix = srcColumn.Prefix; destColumn.ReadOnly = srcColumn.ReadOnly; // Do not touch Unique property - setting Unique to true creates a UniqueConstraint // behind the scenes and we do not want it. } // CloneColumn -- Creates a copy of the given column. public static DataColumn CloneColumn(DataColumn column){ DataColumn newColumn = new DataColumn(); CopyColumn(column, newColumn); return newColumn; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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