/// <summary>
/// An Expression extension method that gets a property or field access from an expression.
/// </summary>
/// <exception cref="Exception">Thrown when an exception error condition occurs.</exception>
/// <param name="expression">The expression to act on.</param>
/// <param name="parameterExpression">The parameter expression.</param>
/// <returns>The property or field access from the expression.</returns>
internal static PropertyOrFieldAccessor GetPropertyOrFieldAccess(this Expression expression, ParameterExpression parameterExpression, MemberInfo member = null)
{
var memberName = member != null ? member.Name : "";
var paths = new List <MemberInfo>();
MemberExpression memberExpression;
do
{
memberExpression = RemoveConvert(expression) as MemberExpression;
if (memberExpression == null)
{
return(new PropertyOrFieldAccessor(true)
{
Member = memberName
});
}
var propertyInfo = memberExpression.Member as PropertyInfo;
var fieldInfo = memberExpression.Member as FieldInfo;
if (propertyInfo != null)
{
paths.Add(propertyInfo);
}
if (fieldInfo != null)
{
paths.Add(fieldInfo);
}
expression = memberExpression.Expression;
} while (memberExpression.Expression != parameterExpression);
paths.Reverse();
var accessor = new PropertyOrFieldAccessor(paths.AsReadOnly());
if (memberName == "")
{
memberName = accessor.ToString();
}
accessor.Member = memberName;
return(accessor);
}
/// <summary>
/// An Expression extension method that gets a property or field access from an expression.
/// </summary>
/// <exception cref="Exception">Thrown when an exception error condition occurs.</exception>
/// <param name="expression">The expression to act on.</param>
/// <param name="parameterExpression">The parameter expression.</param>
/// <returns>The property or field access from the expression.</returns>
internal static PropertyOrFieldAccessor GetPropertyOrFieldAccess(this Expression expression, ParameterExpression parameterExpression, MemberInfo member = null)
{
var memberName = member != null ? member.Name : "";
var paths = new List<MemberInfo>();
MemberExpression memberExpression;
do
{
memberExpression = RemoveConvert(expression) as MemberExpression;
if (memberExpression == null)
{
return new PropertyOrFieldAccessor(true) {Member = memberName};
}
var propertyInfo = memberExpression.Member as PropertyInfo;
var fieldInfo = memberExpression.Member as FieldInfo;
if (propertyInfo != null)
{
paths.Add(propertyInfo);
}
if (fieldInfo != null)
{
paths.Add(fieldInfo);
}
expression = memberExpression.Expression;
} while (memberExpression.Expression != parameterExpression);
paths.Reverse();
var accessor = new PropertyOrFieldAccessor(paths.AsReadOnly());
if (memberName == "")
{
memberName = accessor.ToString();
}
accessor.Member = memberName;
return accessor;
}
