71 lines
2.3 KiB
C#
71 lines
2.3 KiB
C#
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/* Copyright (C) 2008 - 2011 Jordan Marr
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library. If not, see <http://www.gnu.org/licenses/>. */
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using System;
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using System.Reflection;
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namespace Marr.Data
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{
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public class ReflectionHelper
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{
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/// <summary>
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/// Converts a DBNull.Value to a null for a reference field,
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/// or the default value of a value field.
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/// </summary>
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/// <param name="fieldType"></param>
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/// <returns></returns>
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public static object GetDefaultValue(Type fieldType)
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{
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if (fieldType.IsGenericType)
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{
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return null;
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}
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else if (fieldType.IsValueType)
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{
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return Activator.CreateInstance(fieldType);
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}
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else
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{
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return null;
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}
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}
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/// <summary>
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/// Gets the CLR data type of a MemberInfo.
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/// If the type is nullable, returns the underlying type.
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/// </summary>
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/// <param name="member"></param>
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/// <returns></returns>
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public static Type GetMemberType(MemberInfo member)
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{
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Type memberType = null;
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if (member.MemberType == MemberTypes.Property)
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memberType = (member as PropertyInfo).PropertyType;
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else if (member.MemberType == MemberTypes.Field)
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memberType = (member as FieldInfo).FieldType;
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else
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memberType = typeof(object);
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// Handle nullable types - get underlying type
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if (memberType.IsGenericType && memberType.GetGenericTypeDefinition() == typeof(Nullable<>))
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{
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memberType = memberType.GetGenericArguments()[0];
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}
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return memberType;
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}
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}
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}
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