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Separated GetPropertyValue into 2 separate methods and removed type changing to prevent unintended consequences.

pull/60/head
David Hall 2019-04-09 09:16:59 -06:00
parent 6f62808fc5
commit 39264cc1ab
1 changed files with 13 additions and 3 deletions
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16
Core/Extensions/ReflectionExtensions.cs
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@ -61,16 +61,26 @@ namespace Vanara.Extensions
bool ImplIEnumT(Type t) => t.IsGenericType && t.GetGenericTypeDefinition() == typeof(IEnumerable<>);
}
/// <summary>Gets a named property value from an object.</summary>
/// <typeparam name="T">The expected type of the property to be returned.</typeparam>
/// <param name="obj">The object from which to retrieve the property.</param>
/// <param name="propertyName">Name of the property.</param>
/// <returns>The property value.</returns>
public static T GetPropertyValue<T>(this object obj, string propertyName)
{
if (obj is null) throw new ArgumentNullException(nameof(obj));
return (T)obj.GetType().InvokeMember(propertyName, BindingFlags.GetProperty | bindingFlags, null, obj, null, null);
}
/// <summary>Gets a named property value from an object.</summary>
/// <typeparam name="T">The expected type of the property to be returned.</typeparam>
/// <param name="obj">The object from which to retrieve the property.</param>
/// <param name="propertyName">Name of the property.</param>
/// <param name="defaultValue">The default value to return in the instance that the property is not found.</param>
/// <returns>The property value, if found, or the <paramref name="defaultValue"/> if not.</returns>
public static T GetPropertyValue<T>(this object obj, string propertyName, T defaultValue = default)
public static T GetPropertyValue<T>(this object obj, string propertyName, T defaultValue)
{
if (obj is null || propertyName is null) return defaultValue;
try { return (T)Convert.ChangeType(obj.GetType().InvokeMember(propertyName, BindingFlags.GetProperty | bindingFlags, null, obj, null, null), typeof(T)); }
try { return GetPropertyValue<T>(obj, propertyName); }
catch { return defaultValue; }
}