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@Adam--
Last active September 25, 2015 13:09
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Extracts a property name string from an Expression.
using System;
using System.Globalization;
using System.Linq.Expressions;
using System.Reflection;
public static class PropertyNameSupport
{
private const string ExceptionMessageFormat = "Property expression {0}. Ensure calling with () => Property.";
private const string ParameterName = "propertyExpression";
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters", Justification = "Changing to base type LambdaExpression causes callers to not be able to use () => Property.")]
public static string ExtractPropertyNameFromExpression<T>(Expression<Func<T>> propertyExpression)
{
if (propertyExpression == null)
{
throw new ArgumentNullException(ParameterName);
}
var memberExpression = propertyExpression.Body as MemberExpression;
if (memberExpression == null)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, ExceptionMessageFormat, "body is null"));
}
var property = memberExpression.Member as PropertyInfo;
if (property == null)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, ExceptionMessageFormat, "member is null"), ParameterName);
}
if (property.GetMethod.IsStatic)
{
throw new ArgumentException("member property is static.", ParameterName);
}
if (property.DeclaringType == null)
{
throw new ArgumentException("member property declaring type is null.", ParameterName);
}
return memberExpression.Member.Name;
}
}
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