How to derive any of the inner list of classes having count > 0 using linq or other approach

ParentClass

ParentClass contains 10 inner classess - ChildClass1, ChildClass2, ChildClass3,...ChildClass10

class

public class ParentClass
{
    public List<ChildClass1> ChildClass1 { get; set; }
    public List<ChildClass2> ChildClass2 { get; set; }
    .
    .
    public List<ChildClass10> ChildClass10 { get; set; }
}

I having ParentClassObj from which how can I derive any of the inner class having count > 0.

I have one solution but it is not feasible to check for all 10 inner list of classes which is as below

if(!(ParentClassObj.ChildClass1.Any() && ParentClassObj.ChildClass2.Any() ...)
{
  // return not found
}

Is there any optimized solution using Linq or other approach to derive. Thanks

CodePudding user response：

The reflection way. Please see the IsAllChildCountsMoreThanZero method and change to what you want.

        public class ParentClass
        {
            public List<ChildClass1> ChildClass1 { get; set; }
            public List<ChildClass2> ChildClass2 { get; set; }
            public List<ChildClass10> ChildClass10 { get; set; }

            public bool IsAllChildCountsMoreThanZero()
            {
                foreach (var prop in typeof(ParentClass).GetProperties())
                {
                    var propType = prop.PropertyType;

                    if (propType.IsGenericType && (propType.GetGenericTypeDefinition() == typeof(List<>)))
                    {
                        var propertyValue = prop.GetValue(this, null);
                        if (propertyValue == null) return false;
                        var listPropertyValue = (IList)propertyValue;
                        if (listPropertyValue.Count == 0)
                        {
                            return false;
                        }
                    }
                }
                return true;
            }
        }