/// <summary>
/// 打开新的查询界面
/// </summary>
/// <param name="item"></param>
public void OpenQuery(GroupedNavigationItemViewModel item)
{
if (item != null && !_openQueries.Contains(item))
{
OpenQueries.Add(item);
}
}
/// <summary>
/// 关闭当前查询界面
/// </summary>
/// <param name="item"></param>
public void CloseQuery(GroupedNavigationItemViewModel item)
{
int index = OpenQueries.IndexOf(item);
if (index > 0)
{
SelectedQuery = OpenQueries[index - 1];
OpenQueries.Remove(item);
}
else
{
OpenQueries.Remove(item);
SelectedQuery = OpenQueries.FirstOrDefault();
}
item.OnClose();
}