/// <summary>
/// Adds, deletes or updates with new variable change request data inside the current session.
/// </summary>
public void Update(EnvironmentSessionItem item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
if (item.Target != EnvironmentVariableTarget.Process)
{
Update(new EnvironmentSessionItem(EnvironmentVariableTarget.Process, item.Name, item.Value, item.PrimaryValue));
}
EnvironmentSessionItem existingItem = GetVariable(item.Target, item.Name);
bool notify = false;
if (existingItem != null)
{
// if new value set to environment variable
// is the same as the original value,
// then we can remove it:
if (existingItem.PrimaryValue == item.Value)
{
_items.Remove(existingItem);
notify = true;
}
else
{
if (existingItem.Value != item.Value)
{
existingItem.Value = item.Value;
notify = true;
}
}
}
else
{
_items.Add(item);
notify = true;
}
if (notify && Changed != null)
{
Changed(this, new EnvironmentSessionEventArgs(_items.Count));
}
}
