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The AutoComplete feature of SearchBox can be customized through the use of a plug-in, or with Javascript on the client side.
For maximum efficiency plug-in DLLs are not loaded unless keyotiSearchAutocomplete.options.sew_autoCompleteQueryLoadPlugin is set "true". Set this property in the Javascript, in order to be able to modify the autocomplete suggestions.
A Plug-in project can quickly be generated from the 'Plug-ins' tab in the Index Management Tool, in the project you will find code which handles the AutoCompleteSuggestionsGenerated event. For more information on plug-ins, see the overview of the Central Event System in general.
A plug-in class will subscribe to the Action event and process ActionName.AutoCompleteSuggestionsGenerated. The associated ActionData.Data is of type ArrayList, and contains a list of SearchBoxAutoCompleteHelper.SuggestionResultPair objects. The original text entered by the user is accessible through 'sender' (see below)
private void CentralEventDispatcher_Action(object sender, Keyoti.SearchEngine.Events.ActionEventArgs e)
{
if(e.ActionData.Name== ActionName.AutoCompleteSuggestionsGenerated)
{
ArrayList suggestionPairs = e.ActionData.Data as ArrayList;
Keyoti.SearchEngine.Web.SearchBoxAutoCompleteHelper helper =
sender as Keyoti.SearchEngine.Web.SearchBoxAutoCompleteHelper;
string textEnteredByUser = helper.Query;
string[] wordsInText = helper.Segments;
suggestionPairs.Add(new
Keyoti.SearchEngine.Web.SearchBoxAutoCompleteHelper.SuggestionResultPair("testQuery", 99));
}
}
Private Sub CentralEventDispatcher_Action(ByVal sender As Object,_
ByVal e As Keyoti.SearchEngine.Events.ActionEventArgs)
If (e.ActionData.Name = ActionName.AutoCompleteSuggestionsGenerated) Then
Dim suggestionPairs As ArrayList = CType(e.ActionData.Data,ArrayList)
Dim helper As Keyoti.SearchEngine.Web.SearchBoxAutoCompleteHelper = _
CType(sender,Keyoti.SearchEngine.Web.SearchBoxAutoCompleteHelper)
Dim textEnteredByUser As String = helper.Query
Dim wordsInText() As String = helper.Segments
suggestionPairs.Add(New _
Keyoti.SearchEngine.Web.SearchBoxAutoCompleteHelper.SuggestionResultPair("testQuery", 99))
End If
End Sub
In this example the suggestionPairs list is modified with a new suggestion 'testQuery' added to the end. The list can be cleared, or items removed too. Use 'textEnteredByUser' or 'wordsInText' to determine what the user has typed.
On the page with the SearchBox, specify a function called keyotiSearchAutocomplete.sew_OnAutoCompleteSuggestionsGenerated, this will be automatically called by the autocomplete engine when suggestions are generated, allowing for modification of the suggestion list or items in the list.
keyotiSearchAutocomplete.sew_OnAutoCompleteSuggestionsGenerated = function (query, suggestions) {
//how to iterate the generated suggestions
for (var i = 0; i < suggestions.length; i++) {
var suggestionText = suggestions[i][0];
//# of results, will be -1 if AutoCompleteQueryShowNumberOfResults==false
var suggestionNumberOfResults = suggestions[i][1];
//modify the text?
suggestions[i][0] = suggestions[i][0] + "*"; //turn each suggestion into a wildcard
}
//add a bonus suggestion, with '10' predicted results
suggestions[suggestions.length] = ["bonus", 10];
}