public IRawElementProviderSimple FindItemByProperty(IRawElementProviderSimple startAfter, int propertyId, object value)
{
if ((propertyId != 0) && (!DataGridGroupAutomationPeer.IsPropertySupportedForFindItem(propertyId)))
{
throw new ArgumentException("Property not supported");
}
Group owner = this.Owner;
GroupGeneratorNode generatorNode = owner.GeneratorNode;
if (generatorNode == null)
{
return(null);
}
DataGridContext dataGridContext = owner.DataGridContext;
if (dataGridContext == null)
{
return(null);
}
this.ResetChildrenCache();
IList <object> items = owner.GetItems();
int itemsCount = (items == null) ? 0 : items.Count;
DataGridItemAutomationPeer startAfterItemPeer = null;
HeaderFooterItemAutomationPeer startAfterHeaderFooterPeer = null;
if (startAfter != null)
{
AutomationPeer startAfterPeer = this.PeerFromProvider(startAfter);
if (startAfterPeer == null)
{
return(null);
}
startAfterItemPeer = startAfterPeer as DataGridItemAutomationPeer;
startAfterHeaderFooterPeer = startAfterPeer as HeaderFooterItemAutomationPeer;
}
int startIndex = 0;
// Get header count
HeadersFootersGeneratorNode headerNode = generatorNode.GetHeaderNode();
int headersCount = (headerNode == null) ? 0 : headerNode.ItemCount;
// Get footer count
HeadersFootersGeneratorNode footerNode = generatorNode.GetFooterNode();
int footersCount = (footerNode == null) ? 0 : footerNode.ItemCount;
int childrenCount = headersCount + footersCount + itemsCount;
if (startAfterItemPeer != null)
{
startIndex = headersCount + startAfterItemPeer.Index + 1;
}
else if (startAfterHeaderFooterPeer != null)
{
startIndex = startAfterHeaderFooterPeer.Index + 1;
switch (startAfterHeaderFooterPeer.Type)
{
case HeaderFooterItemAutomationPeer.HeaderFooterType.Header:
{
break;
}
case HeaderFooterItemAutomationPeer.HeaderFooterType.Footer:
{
startIndex += headersCount + itemsCount;
break;
}
}
}
if (propertyId == 0)
{
AutomationPeer peer = this.GetPeerForChildrenIndex(startIndex);
if (peer == null)
{
return(null);
}
return(this.ProviderFromPeer(peer));
}
object propertyValue = null;
for (int i = startIndex; i < childrenCount; i++)
{
AutomationPeer peer = this.GetPeerForChildrenIndex(i);
if (peer != null)
{
try
{
propertyValue = peer.GetPropertyValue(propertyId);
}
catch (Exception exception)
{
if (exception is ElementNotAvailableException)
{
continue;
}
}
if (object.Equals(value, propertyValue))
{
return(this.ProviderFromPeer(peer));
}
}
}
return(null);
}
