78 lines
2.6 KiB
C#
78 lines
2.6 KiB
C#
|
using System;
|
|||
|
|
using System.Linq.Expressions;
|
|||
|
|
using System.Reflection;
|
|||
|
|
|
|||
|
|
namespace DynamicDescriptors;
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Provides various reflection-related methods.
|
|||
|
|
/// </summary>
|
|||
|
|
internal static class Reflect
|
|||
|
|
{
|
|||
|
|
/// <summary>
|
|||
|
|
/// Returns the name of the property referred to by the specified property expression.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <typeparam name="TSource">
|
|||
|
|
/// Type containing the property.
|
|||
|
|
/// </typeparam>
|
|||
|
|
/// <typeparam name="TProperty">
|
|||
|
|
/// Type of the property.
|
|||
|
|
/// </typeparam>
|
|||
|
|
/// <param name="propertyExpression">
|
|||
|
|
/// An <see cref="Expression"/> representing a Func mapping an instance of type TSource
|
|||
|
|
/// to an instance of type TProperty.
|
|||
|
|
/// </param>
|
|||
|
|
/// <returns>
|
|||
|
|
/// The name of the property referred to by the specified property expression.
|
|||
|
|
/// </returns>
|
|||
|
|
public static string GetPropertyName<TSource, TProperty>(Expression<Func<TSource, TProperty>> propertyExpression)
|
|||
|
|
{
|
|||
|
|
if (propertyExpression == null)
|
|||
|
|
{
|
|||
|
|
throw new ArgumentNullException(nameof(propertyExpression));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return GetPropertyInfo<TSource, TProperty>(propertyExpression).Name;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Returns a <see cref="PropertyInfo"/> instance for the property referred to by the specified
|
|||
|
|
/// property expression.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <typeparam name="TSource">
|
|||
|
|
/// Type containing the property.
|
|||
|
|
/// </typeparam>
|
|||
|
|
/// <typeparam name="TProperty">
|
|||
|
|
/// Type of the property.
|
|||
|
|
/// </typeparam>
|
|||
|
|
/// <param name="propertyExpression">
|
|||
|
|
/// An <see cref="Expression"/> representing a Func mapping an instance of type TSource to an instance
|
|||
|
|
/// of type TProperty.
|
|||
|
|
/// </param>
|
|||
|
|
/// <returns>
|
|||
|
|
/// A <see cref="PropertyInfo"/> instance for the property referred to by the specified
|
|||
|
|
/// property expression.
|
|||
|
|
/// </returns>
|
|||
|
|
public static PropertyInfo GetPropertyInfo<TSource, TProperty>(Expression<Func<TSource, TProperty>> propertyExpression)
|
|||
|
|
{
|
|||
|
|
if (propertyExpression == null)
|
|||
|
|
{
|
|||
|
|
throw new ArgumentNullException(nameof(propertyExpression));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var member = propertyExpression.Body as MemberExpression;
|
|||
|
|
if (member == null)
|
|||
|
|
{
|
|||
|
|
throw new ArgumentException($"Expression '{propertyExpression}' refers to a method, not a property.");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var propertyInfo = member.Member as PropertyInfo;
|
|||
|
|
if (propertyInfo == null)
|
|||
|
|
{
|
|||
|
|
throw new ArgumentException($"Expression '{propertyExpression}' refers to a field, not a property.");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return propertyInfo;
|
|||
|
|
}
|
|||
|
|
}
|