How to check all properties of an object whether null or empty?

Question

I have an object lets call it ObjectA

and that object has 10 properties and those are all strings.

 var myObject = new {Property1=\"\",P         


        

Answer 1

A slightly different way of expressing the linq to see if all string properties of an object are non null and non empty:

public static bool AllStringPropertyValuesAreNonEmpty(object myObject)
{
    var allStringPropertyValues = 
        from   property in myObject.GetType().GetProperties()
        where  property.PropertyType == typeof(string) && property.CanRead
        select (string) property.GetValue(myObject);

    return allStringPropertyValues.All(value => !string.IsNullOrEmpty(value));
}

Answer 2

The following code returns if any property is not null.

  return myObject.GetType()
                 .GetProperties() //get all properties on object
                 .Select(pi => pi.GetValue(myObject)) //get value for the propery
                 .Any(value => value != null); // Check if one of the values is not null, if so it returns true.

Answer 3

you can use reflection and extension methods to do this.

using System.Reflection;
public static class ExtensionMethods
{
    public static bool StringPropertiesEmpty(this object value)
    {
        foreach (PropertyInfo objProp in value.GetType().GetProperties())
        {
            if (objProp.CanRead)
            {
                object val = objProp.GetValue(value, null);
                if (val.GetType() == typeof(string))
                {
                    if (val == "" || val == null)
                    {
                        return true;
                    }
                }
            }
        }
        return false;
    }
}

then use it on any object with string properties

test obj = new test();
if (obj.StringPropertiesEmpty() == true)
{
    // some of these string properties are empty or null
}

Answer 4

Here you go

var instOfA = new ObjectA();
bool isAnyPropEmpty = instOfA.GetType().GetProperties()
     .Where(p => p.GetValue(instOfA) is string) // selecting only string props
     .Any(p => string.IsNullOrWhiteSpace((p.GetValue(instOfA) as string)));

and here's the class

class ObjectA
{
    public string A { get; set; }
    public string B { get; set; }
}

Answer 5

No, I don't think there is a method to do exactly that.

You'd be best writing a simple method that takes your object and returns true or false.

Alternatively, if the properties are all the same, and you just want to parse through them and find a single null or empty, perhaps some sort of collection of strings would work for you?

Answer 6

To only check if all properties are null:

bool allPropertiesNull = !myObject.GetType().GetProperties().Any(prop => prop == null);