Hiding a property from grid at run time based on some condition

Question

Hi,

I want to hide property at run time from grid based on only if property value is null. I can't use Browsable attribute to a property of a class as this always hides. Could anyone help me in this.

Answer 1

There is a great article on CodeProject that answers your question, you can find it here: Unleash PropertyGrid with Dynamic Properties and Globalization .

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Answer 2

Hi Harish,

it's not very clear to me what you want to do, but it looks like you're trying to crop Property_X out of the base class A instead of creating a proper base class A (without Property_X) and then deriving a class B containing Property_X.

If the nulling of the property is of such importance that you consider to show/hide the property in the UI at runtime maybe you should think of changing your class design.

Here is a very simple example of how I would do it:

    public partial class Form1 : Form
    {
        private IPerson[] m_Persons = new IPerson[2];

        public Form1()
        {
            InitializeComponent();

            m_Persons[0] = new Person() { FirstName = "John", LastName = "Doe" };
            m_Persons[1] = new Employee( m_Persons[0], "101");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Randomly select a Person/Employee object for display
            int idx = new Random().Next(0, 2) == 0 ? 0 : 1;
            propertyGrid1.SelectedObject = m_Persons[idx];
        }
    }

And here are the classes:

    internal interface IPerson
    {
        string FirstName { get; set; }
        string LastName { get; set; }
    }

    class Person : IPerson
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
    }

    class Employee : Person
    {
        public Employee() : this(null, null)
        {
        }

        public Employee(string employeeId)
            : this(null, employeeId)
        { 
        }

        public Employee(IPerson person, string employeeId)
        {
            base.FirstName = person.FirstName;
            base.LastName = person.LastName;
            EmployeeId = employeeId;
        }

        public string EmployeeId { get; set; }
    }

Hope this helps.

Marcel

Answer 3

Hi Harish,
Are those replies helpful for you? It will be very beneficial for other community members having the similar questions if  you mark useful replies as answers.

Thanks,

Eric

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