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//
// DataRowExtensions.cs
//
// Author:
// Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2008 Novell, Inc. http://www.novell.com
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Runtime.CompilerServices;
namespace System.Data
{
public static class DataRowExtensions
{
public static T Field<T> (this DataRow row, int columnIndex)
{
return Field<T> (row, columnIndex, DataRowVersion.Current);
}
public static T Field<T> (this DataRow row, int columnIndex, DataRowVersion version)
{
object ret = row [columnIndex, version];
if (ret == DBNull.Value) {
Type type = typeof (T);
Type genericTypeDef = type.IsGenericType ? type.GetGenericTypeDefinition () : null;
if (!type.IsValueType || genericTypeDef != null && genericTypeDef == typeof (Nullable <>))
return default (T);
throw new StrongTypingException ("Cannot get strong typed value since it is DB null. Please use a nullable type.", null);
}
return (T) ret;
}
public static T Field<T> (this DataRow row, string columnName)
{
return Field<T> (row, columnName, DataRowVersion.Current);
}
public static T Field<T> (this DataRow row, string columnName, DataRowVersion version)
{
return Field<T> (row, row.Table.Columns [columnName], version);
}
public static T Field<T> (this DataRow row, DataColumn column)
{
return Field<T> (row, column, DataRowVersion.Current);
}
public static T Field<T> (this DataRow row, DataColumn column, DataRowVersion version)
{
return Field<T> (row, row.Table.Columns.IndexOf (column), version);
}
public static void SetField<T> (this DataRow row, int columnIndex, T value)
{
row [columnIndex] = value;
}
public static void SetField<T> (this DataRow row, string columnName, T value)
{
row [columnName] = value;
}
public static void SetField<T> (this DataRow row, DataColumn column, T value)
{
row [column] = value;
}
}
}
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