private void ComboBoxEx_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (SelectedItem != null)
{
ComboBoxItemEx item = (ComboBoxItemEx)SelectedItem;
if (_lastKey == null || item.ID != _lastKey)
{
_lastKey = item.ID;
if (!publishing)
{
_controlHarness.SendXml(DeltaXml);
}
}
}
}
public virtual void PublishData(XElement data)
{
publishing = true;
_lastKey = null;
try
{
string selectedKey = null;
if (SelectedItem != null && SelectedItem is ComboBoxItemEx)
{
selectedKey = ((ComboBoxItemEx)SelectedItem).ID; // Cache the previously selected key, to reapply after the list is refilled
}
XElement ColumnDefintions = data.Element(Common.Data.Columns);
XElement Rows = data.Element(Common.Data.Rows);
this.Items.Clear();
if (Rows == null || ColumnDefintions == null)
{
return;
}
string columnToUse = null;
// Determine which column to display in the list
if (!string.IsNullOrEmpty(DisplayTextColumn ?? DisplayMemberPath))
{
// Use the column specified by the client
XElement displayColumn = ColumnDefintions.Elements(Common.Data.Column).Where(x => x.Attribute(Common.Data.ColumnField).Value == (DisplayTextColumn ?? DisplayMemberPath)).FirstOrDefault();
if (displayColumn != null)
{
columnToUse = displayColumn.GetAttributeValue(Common.IDAttrib);
}
}
else
{
// Use the first *string* column that has a width
XNode columnNode = ColumnDefintions.FirstNode;
while (columnToUse == null && columnNode != null)
{
if (columnNode is XElement)
{
XElement element = (XElement)columnNode;
int theWidth = 0;
string dataType = element.GetAttributeValue(Common.Datatypes.AttribName);
if (element.Attribute(Common.Data.ColumnWidth) != null)
{
int.TryParse(element.Attribute(Common.Data.ColumnWidth).Value, out theWidth);
}
if (theWidth != 0 && dataType == Common.Datatypes.String)
{
columnToUse = element.Attribute(Common.IDAttrib).Value;
}
}
columnNode = columnNode.NextNode;
}
}
// Always add an empty or null entry
if (_showNullEntry.HasValue && _showNullEntry.Value)
{
ComboBoxItemEx nullItem = new ComboBoxItemEx("", Common.Null);
nullItem.Content = NullEntryText;
nullItem.Background = this.Background;
this.Items.Add(nullItem);
}
_dictionary = new Dictionary <string, ComboBoxItemEx>();
XNode node = Rows.FirstNode;
while (node != null)
{
if (node is XElement)
{
XElement rowData = (XElement)node;
string id = rowData.Attribute(Common.IDAttrib).Value;
string type = rowData.GetAttributeValue(Common.Data.RowType);
ComboBoxItemEx item = new ComboBoxItemEx(id, type);
XElement displayColumn = rowData.Elements("Cell").Where(x => x.Attribute("id").Value == columnToUse).FirstOrDefault();
if (displayColumn != null)
{
item.Content = displayColumn.Value;
if (id.Length == 0)
{
id = displayColumn.Value;
}
}
this.Items.Add(item);
_dictionary.Add(item.ID.ToString(), item);
}
node = node.NextNode;
}
if (selectedKey != null)
{
SelectKey(selectedKey); // Select the previously selected key
}
}
finally
{
publishing = false;
}
}
public virtual void PublishData(XElement data)
{
publishing = true;
_lastKey = null;
try
{
string selectedKey = null;
if (SelectedItem != null && SelectedItem is ComboBoxItemEx)
selectedKey = ((ComboBoxItemEx)SelectedItem).ID; // Cache the previously selected key, to reapply after the list is refilled
XElement ColumnDefintions = data.Element(Common.Data.Columns);
XElement Rows = data.Element(Common.Data.Rows);
this.Items.Clear();
if (Rows == null || ColumnDefintions == null)
return;
string columnToUse = null;
// Determine which column to display in the list
if (!string.IsNullOrEmpty(DisplayTextColumn ?? DisplayMemberPath))
{
// Use the column specified by the client
XElement displayColumn = ColumnDefintions.Elements(Common.Data.Column).Where(x => x.Attribute(Common.Data.ColumnField).Value == (DisplayTextColumn ?? DisplayMemberPath)).FirstOrDefault();
if (displayColumn != null)
columnToUse = displayColumn.GetAttributeValue(Common.IDAttrib);
}
else
{
// Use the first *string* column that has a width
XNode columnNode = ColumnDefintions.FirstNode;
while (columnToUse == null && columnNode != null)
{
if (columnNode is XElement)
{
XElement element = (XElement)columnNode;
int theWidth = 0;
string dataType = element.GetAttributeValue(Common.Datatypes.AttribName);
if (element.Attribute(Common.Data.ColumnWidth) != null)
int.TryParse(element.Attribute(Common.Data.ColumnWidth).Value, out theWidth);
if (theWidth != 0 && dataType == Common.Datatypes.String)
columnToUse = element.Attribute(Common.IDAttrib).Value;
}
columnNode = columnNode.NextNode;
}
}
// Always add an empty or null entry
if (_showNullEntry.HasValue && _showNullEntry.Value)
{
ComboBoxItemEx nullItem = new ComboBoxItemEx("", Common.Null);
nullItem.Content = NullEntryText;
nullItem.Background = this.Background;
this.Items.Add(nullItem);
}
_dictionary = new Dictionary<string, ComboBoxItemEx>();
XNode node = Rows.FirstNode;
while (node != null)
{
if (node is XElement)
{
XElement rowData = (XElement)node;
string id = rowData.Attribute(Common.IDAttrib).Value;
string type = rowData.GetAttributeValue(Common.Data.RowType);
ComboBoxItemEx item = new ComboBoxItemEx(id, type);
XElement displayColumn = rowData.Elements("Cell").Where(x => x.Attribute("id").Value == columnToUse).FirstOrDefault();
if (displayColumn != null)
{
item.Content = displayColumn.Value;
if (id.Length == 0)
id = displayColumn.Value;
}
this.Items.Add(item);
_dictionary.Add(item.ID.ToString(), item);
}
node = node.NextNode;
}
if (selectedKey != null)
SelectKey(selectedKey); // Select the previously selected key
}
finally
{
publishing = false;
}
}
