31 lines
1.1 KiB
C#
31 lines
1.1 KiB
C#
namespace System.Web.Mvc {
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using System;
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using System.ComponentModel;
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using System.Reflection;
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internal static class ParameterInfoUtil {
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public static bool TryGetDefaultValue(ParameterInfo parameterInfo, out object value) {
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// this will get the default value as seen by the VB / C# compilers
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// if no value was baked in, RawDefaultValue returns DBNull.Value
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object defaultValue = parameterInfo.DefaultValue;
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if (defaultValue != DBNull.Value) {
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value = defaultValue;
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return true;
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}
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// if the compiler did not bake in a default value, check the [DefaultValue] attribute
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DefaultValueAttribute[] attrs = (DefaultValueAttribute[])parameterInfo.GetCustomAttributes(typeof(DefaultValueAttribute), false);
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if (attrs == null || attrs.Length == 0) {
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value = default(object);
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return false;
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}
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else {
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value = attrs[0].Value;
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return true;
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}
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}
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}
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}
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