// Populate a list with the base type for the EntitySet plus all derived types, and a special entry to indicate no filter
// devnote: This method should not automatically reset Select because it can be used to load the initial state
// for the form, in which case we need to preserve any values that are already set on the data source control.
private void LoadEntityTypeFilters(EntityDataSourceEntitySetNameItem entitySetItem, string entityTypeFilter)
{
// If this is an EntitySet that we found in the project's metadata, get the type information
if (entitySetItem != null && entitySetItem.EntitySet != null)
{
_entityTypeFilters = _helper.GetEntityTypeFilters(entitySetItem.EntitySet.ElementType, false /*sortResults*/);
// add (None) to the beginning of the list
_entityTypeFilters.Insert(0, s_entityTypeFilterNoneItem);
// Try to find the specified type in list and add it if it isn't there
_selectedEntityTypeFilter = FindEntityTypeFilter(entityTypeFilter);
}
else
{
// if this is an unknown EntitySet, there is no way to find a list of types from metadata
// so just create a new list and placeholder for the specified type
_entityTypeFilters = new List<EntityDataSourceEntityTypeFilterItem>();
_entityTypeFilters.Add(s_entityTypeFilterNoneItem);
if (!String.IsNullOrEmpty(entityTypeFilter))
{
_selectedEntityTypeFilter = new EntityDataSourceEntityTypeFilterItem(entityTypeFilter);
_entityTypeFilters.Add(_selectedEntityTypeFilter);
}
else
{
_selectedEntityTypeFilter = s_entityTypeFilterNoneItem;
}
}
// Sort now after we might have added items above
_entityTypeFilters.Sort();
// Update the controls
_panel.SetEntityTypeFilters(_entityTypeFilters);
_panel.SetSelectedEntityTypeFilter(_selectedEntityTypeFilter);
}
// Set EntitySetName in temporary storage
internal void SelectEntitySetName(EntityDataSourceEntitySetNameItem selectedEntitySet)
{
_selectedEntitySetName = selectedEntitySet;
// Load the types for the selected EntitySet, don't select one initially
LoadEntityTypeFilters(selectedEntitySet, null);
// Reinitialize the Select control with a list of properties, don't preserve any existing Select value
LoadSelect(String.Empty);
}
// Find the specified entitySetName in the list or add it if it's not there
private EntityDataSourceEntitySetNameItem FindEntitySetName(string entitySetName)
{
if (!String.IsNullOrEmpty(entitySetName))
{
EntityDataSourceEntitySetNameItem entitySetToSelect = null;
foreach (EntityDataSourceEntitySetNameItem entitySetNameItem in _entitySetNames)
{
// Ignore case here when searching the list for a matching item, but set the temporary state property to the
// correctly-cased version from metadata so that if the user clicks Finish, the correct one will be saved. This
// allows some flexibility the designer without preserving an incorrectly-cased value that could cause errors at runtime.
if (String.Equals(entitySetNameItem.EntitySetName, entitySetName, StringComparison.OrdinalIgnoreCase))
{
entitySetToSelect = entitySetNameItem;
}
}
// didn't find a matching entityset, so just create a placeholder for one using the specified name and add it to the list
if (entitySetToSelect == null)
{
entitySetToSelect = new EntityDataSourceEntitySetNameItem(entitySetName);
_entitySetNames.Add(entitySetToSelect);
}
Debug.Assert(entitySetToSelect != null, "expected a non-null EntityDataSourceEntitySetNameItem");
return entitySetToSelect;
}
return null;
}
// Populates the EntitySetName combobox with all of the discoverable EntitySets for the specified container.
// If the specified entitySetName is not empty, it is added to the list and selected as the initial value
// containerNameItem may not be backed by a real EntityContainer, in which case there is no way to look up the EntitySet in metadata
// devnote: This method should not automatically reset EntityTypeFilter and Select because it can be used to load the initial state
// for the form, in which case we need to preserve any values that are already set on the data source control.
private void LoadEntitySetNames(EntityDataSourceContainerNameItem containerNameItem, string entitySetName)
{
// If this is a container that we found in the project's metadata, get a list of EntitySets for that container
if (containerNameItem != null && containerNameItem.EntityContainer != null)
{
_entitySetNames = _helper.GetEntitySets(containerNameItem.EntityContainer, false /*sortResults*/);
// Try to find the specified entityset in list and add it if it isn't there
_selectedEntitySetName = FindEntitySetName(entitySetName);
}
else
{
// if this is an unknown container, there is no way to find a list of entitysets from metadata
// so just create a new list and placeholder for the specified entityset
_entitySetNames = new List<EntityDataSourceEntitySetNameItem>();
if (!String.IsNullOrEmpty(entitySetName))
{
_selectedEntitySetName = new EntityDataSourceEntitySetNameItem(entitySetName);
_entitySetNames.Add(_selectedEntitySetName);
}
else
{
_selectedEntitySetName = null;
}
}
// Sort the list now, after we may have added one above
_entitySetNames.Sort();
// Update the controls
_panel.SetEntitySetNames(_entitySetNames);
_panel.SetSelectedEntitySetName(_selectedEntitySetName);
}
public void SetSelectedEntitySetName(EntityDataSourceEntitySetNameItem selectedEntitySet)
{
_ignoreEvents = true;
if (selectedEntitySet == null)
{
_entitySetComboBox.SelectedIndex = -1;
}
else
{
_entitySetComboBox.SelectedItem = selectedEntitySet;
}
_ignoreEvents = false;
}
