// Set the connection string in temporary storage
// Returns true if the metadata was successfully loaded for the specified connections
internal bool SelectConnectionStringBuilder(EntityConnectionStringBuilderItem selectedConnection, bool resetContainer)
{
_selectedConnectionStringBuilder = selectedConnection;
bool metadataLoaded = false;
if (selectedConnection != null)
{
if (selectedConnection.EntityConnectionStringBuilder != null)
{
metadataLoaded = _helper.LoadMetadata(selectedConnection.EntityConnectionStringBuilder);
}
else
{
// Since we don't have a valid connection string builder, we don't have enough information to load metadata.
// Clear any existing metadata so we don't see an old item collection on any subsequent calls that access it.
// Don't need to display an error here because that was handled by the caller who created the builder item
_helper.ClearMetadata();
}
}
// Reset the list of containers if requested and set the ComboBox to have no selection.
// In some cases the containers do not need to be reset because the caller wants to delay that until a later event or wants to preserve a specific value
if (resetContainer)
{
string defaultContainerName = _selectedConnectionStringBuilder.EntityConnectionStringBuilder == null ? null : _selectedConnectionStringBuilder.EntityConnectionStringBuilder.Name;
LoadContainerNames(defaultContainerName, false /*initialLoad*/);
}
// Update the controls
UpdateWizardState();
return metadataLoaded;
}
// Expects that the specified builder item is a named connection already in the list, is a full connection string, or is empty
// If empty, the default is to select the named connection option and don't select anything in the list
internal void SetConnectionString(EntityConnectionStringBuilderItem connStrBuilderItem)
{
Debug.Assert(connStrBuilderItem != null, "expected non-null connStrBuilderItem");
_ignoreEvents = true;
// set the state of the ConnectionString radio buttons and associated controls
bool isNamedConnection = connStrBuilderItem.IsEmpty || connStrBuilderItem.IsNamedConnection;
_namedConnectionRadioButton.Checked = isNamedConnection;
_namedConnectionComboBox.Enabled = isNamedConnection;
_connectionStringRadioButton.Checked = !isNamedConnection;
_connectionStringTextBox.Enabled = !isNamedConnection;
// set the value of the control that was just enabled
if (connStrBuilderItem.IsEmpty)
{
_namedConnectionComboBox.SelectedIndex = -1;
_configureObjectContext.SelectConnectionStringHasValue(false /*connectionStringHasValue*/);
}
else if (connStrBuilderItem.IsNamedConnection)
{
_namedConnectionComboBox.SelectedItem = connStrBuilderItem;
_configureObjectContext.SelectConnectionStringHasValue(true /*connectionStringHasValue*/);
}
else
{
_connectionStringTextBox.Text = connStrBuilderItem.ConnectionString;
_configureObjectContext.SelectConnectionStringHasValue(!connStrBuilderItem.IsEmpty);
}
_ignoreEvents = false;
}
// Find the current named connection in the list of connections
// The returned item may refer to the same connection as the specified item, but it will be the actual reference from the list
private EntityConnectionStringBuilderItem FindCurrentNamedConnection(EntityConnectionStringBuilderItem newBuilderItem)
{
Debug.Assert(_namedConnections != null, "_namedConnections should have already been initialized and should not be null");
Debug.Assert(newBuilderItem != null && newBuilderItem.IsNamedConnection, "expected non-null newBuilderItem");
foreach (EntityConnectionStringBuilderItem namedConnectionItem in _namedConnections)
{
if (((IComparable<EntityConnectionStringBuilderItem>)newBuilderItem).CompareTo(namedConnectionItem) == 0)
{
// returning the one that was actually in the list, so we can select it in the control
return namedConnectionItem;
}
}
// didn't find it in the list, so add it
_namedConnections.Add(newBuilderItem);
return newBuilderItem;
}
