/// <summary>
/// Finds all distinct elements for the specified column
/// </summary>
/// <param name="columnName">Name of the column.</param>
/// <returns></returns>
public virtual VList <T> FindAllDistinct(string columnName)
{
PropertyDescriptorCollection props = TypeDescriptor.GetProperties(typeof(T));
PropertyDescriptor filterBy = props.Find(columnName, true);
VList <T> result = new VList <T>();
object a;
object b;
bool found;
foreach (T item in this)
{
a = filterBy.GetValue(item);
found = false;
foreach (T item2 in result)
{
b = filterBy.GetValue(item2);
if ((a == null && b == null) ||
(a != null && b != null && a.Equals(b)))
{
found = true;
break;
}
}
if (!found)
{
result.Add(item);
}
}
return(result);
}
///<summary>
/// Creates an exact copy of this VList{T} object.
///</summary>
///<returns>A new, identical copy of the VList{T}.</returns>
public virtual VList <T> Copy()
{
VList <T> copy = new VList <T>();
foreach (T item in this)
{
T itemCopy = (T)MakeCopyOf(item);
copy.Add(itemCopy);
}
return(copy);
}
///<summary>
/// Finds a collection of <see cref="IEntity" /> objects in the current list matching the search criteria.
///</summary>
/// <param name="findAllByType"><see cref="FindAllByType" /> Type to easily search by</param>
/// <param name="propertyName">Property of the object to search.</param>
/// <param name="value">Value to find.</param>
/// <param name="ignoreCase">A Boolean indicating a case-sensitive or insensitive comparison (true indicates a case-insensitive comparison). String properties only.</param>
public virtual VList <T> FindAllBy(FindAllByType findAllByType, string propertyName, object value, bool ignoreCase)
{
PropertyDescriptorCollection props = base.PropertyCollection;
PropertyDescriptor searchBy = props.Find(propertyName, true);
VList <T> result = new VList <T>();
int index = 0;
while (index > -1)
{
index = this.FindAllBy(findAllByType, searchBy, value, index, ignoreCase);
if (index > -1)
{
result.Add(this[index]);
//Increment the index to start at the next item
index++;
}
}
return(result);
}
