private void PerformSearchActions(string enteredText)
{
enteredText = ApplyDisableWhitespaceTrim(enteredText);
if (enteredText.Equals(_lastTextValue))
{
return;
}
if (string.IsNullOrEmpty(enteredText))
{
ClearSelectedItem();
}
else
{
bool doSearchNow = !IsSearchInProgress && enteredText.Length >= MinimumPrefixLength;
if (doSearchNow)
{
SearchTimer = new DispatcherTimer(
TimeSpan.FromMilliseconds(MinimumSearchDelay),
DispatcherPriority.Background,
new EventHandler(OnSearchTimerTick),
this.Dispatcher);
_lastTextValue = enteredText;
OnSearchBeginning(_lastTextValue, MaxResults, Tag);
SearchProvider.BeginSearchAsync(_lastTextValue, DateTime.Now.ToUniversalTime(), MaxResults, Tag, ProcessSearchResults);
SearchTimer.Start();
}
}
}
private void OnSearchTimerTick(object sender, EventArgs e)
{
if (IsSearchInProgress)
{
var last = ApplyDisableWhitespaceTrim(_lastTextValue);
var current = ApplyDisableWhitespaceTrim(PART_EDITFIELD.Text);
if (!last.Equals(current))
{
_lastTextValue = current;
OnSearchBeginning(current, MaxResults, Tag);
SearchProvider.BeginSearchAsync(_lastTextValue, DateTime.Now.ToUniversalTime(), MaxResults, Tag, ProcessSearchResults);
}
}
}