Hi,

There are a coupe of things about this code that will not work.

First, you are setting the DataSource of the grid to a single Employee instance, and not the ArrayList.

Second, your Employee class has 4 public members, but no public properties, so again, the BindingManager in DotNet will not be able to determine the data structure.

Also, an ArrayList is not a good choice for DataBinding. It will work in a very basic way, but ArrayList and List<T> implement the IList interface which is not really intended for DataBinding. The grid will not be notified when values in your data source change, nor will the grid be able to allow the user to add new rows using these objects.

If you want to create object in memory for the purposes of DataBinding, then those objects have to expose public properties for each column you want the grid to show. And I recommend using a BindingList<T>, rather than an ArrayList.

        public class cEmployee
        {
            private string firstName;

            public string FirstName 
            {
                get{ return this.firstName; }
                set { this.firstName = value; }
            }             
        }

        private void Form1_Load(object sender, EventArgs e)
        {            
            //ArrayList arrayList = new ArrayList();
            BindingList<cEmployee> arrayList = new BindingList<cEmployee>();
            
            cEmployee employee1 = new cEmployee();
            employee1.FirstName = "Mike";
            arrayList.Add(employee1);

            this.ultraGrid1.DataSource = arrayList;
        }