PrncplTypeDescriptor.cs

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using System;
using System.ComponentModel;

namespace AcUtils
{
    [Serializable]
    class PrncplTypeDescriptor : CustomTypeDescriptor
    {
        public PrncplTypeDescriptor(ICustomTypeDescriptor parent)
            : base(parent)
        {
        }

        public override PropertyDescriptorCollection GetProperties(Attribute[] attributes)
        {
            PropertyDescriptorCollection cols = base.GetProperties();
            PropertyDescriptor prncpl = cols["Principal"];
            PropertyDescriptorCollection prncpl_child = prncpl.GetChildProperties();
            PropertyDescriptor[] arr = new PropertyDescriptor[cols.Count + 4];
            cols.CopyTo(arr, 0);
            arr[cols.Count] = new SubPropertyDescriptor(prncpl, prncpl_child["ID"], "Principal_ID");
            arr[cols.Count + 1] = new SubPropertyDescriptor(prncpl, prncpl_child["Name"], "Principal_Name");
            arr[cols.Count + 2] = new SubPropertyDescriptor(prncpl, prncpl_child["Status"], "Principal_Status");
            arr[cols.Count + 3] = new SubPropertyDescriptor(prncpl, prncpl_child["Members"], "Principal_Members");
            PropertyDescriptorCollection newcols = new PropertyDescriptorCollection(arr);
            return newcols;
        }
    }
}