MSDN Magazine - August 2008 - (Page 25)

ing a button). This solution, however, provides a much poorer user experience because it doesn’t provide any immediate feedback. In addition, it doesn’t solve the problem that any given search could take a significant amount of time. Could you improve performance by capping the number of rows returned by the query? Sure, but this still detracts from the user experience because it’s not showing all of the data. You’d have to design more UI to tell the user you didn’t finish the search and provide a mechanism to do a full search. The full search would leave you right back where you started—with a slow experience. So you need to show all the data, and you can’t modify the structure. But do you have to show all of the data at once? What if you only give the user a small subset of the data at a time, and if a key press is detected you abandon the current search and start a new Figure 3 Wheel Search Class Public Class WheelSearch Private m_doc As XDocument = New XDocument() Private m_query As Query = Query.MethodsOfName Public Property Query() As Query Get Return m_query End Get Set(ByVal value As Query) m_query = value OnSearchTextChanged(Nothing, EventArgs.Empty) End Set End Property Public Property Xml() As XDocument Get Return m_doc End Get Set(ByVal value As XDocument) If value Is Nothing Then value = New XDocument End If m_doc = value OnSearchTextChanged(Nothing, EventArgs.Empty) End Set End Property Public Sub New() ' This call is required by the Windows Form Designer. InitializeComponent() ' Add any initialization after the InitializeComponent() call. m_dataGridView.AutoGenerateColumns = True End Sub Protected Overrides Sub OnLoad(ByVal e As System.EventArgs) MyBase.OnLoad(e) OnSearchTextChanged(Nothing, EventArgs.Empty) End Sub #Region "Event Handlers" Private Sub OnSearchTextChanged(ByVal sender As Object, _ ByVal e As EventArgs) Handles m_searchTb.TextChanged If m_doc Is Nothing Then Return End If m_dataGridView.IncrementalSearch = _ QueryContainer.Search(m_query, m_doc, m_searchTb.Text) End Sub #End Region End Class Instantly Search Terabytes of Text N dozens of indexed, unindexed, fielded data and full-text search options (including Unicode support for hundreds of international languages) N file parsers / converters for hit-highlighted display of all popular file types N Spider supports static and dynamic web data; highlights hits while displaying links, formatting and images intact New .NET Spider API h Spider Desktop wit h Spider Network wit CD/DVDs Publish for pider Web with S Win & .NET Engine for Linux Engine for New 64-bit N API supports .NET, C++, Java, databases, etc. The Smart Choice for Text Retrieval® since 1991 N “Bottom line: dtSearch manages a terabyte of text in a single index and returns results in less than a second” – InfoWorld N “For combing through large amounts of data,” dtSearch “leads the market” – Network Computing N dtSearch “covers all data sources powerful Web-based engines” – eWEEK N dtSearch “searches at blazing speeds” – Computer Reseller News Test Center See www.dtsearch.com for hundreds more reviews, and hundreds of developer case studies Contact dtSearch for fully-functional evaluations msdnmagazine.com 1-800-IT-FINDS • www.dtsearch.com August 2008 25 http://www.dtsearch.com http://www.dtsearch.com http://www.dtsearch.com http://msdnmagazine.com

Table of Contents Feed for the Digital Edition of MSDN Magazine - August 2008

MSDN Magazine - August 2008 Toolbox CLR Inside Out Basic Instincts Cutting Edge Patterns in Practice Data 2.0 - Expose And Consume Data In A Web Services World Biztalk EDI - Build A Robust EDI Solution With BizTalk Server Silverlight - Create Animations With XAML And Expression Blend Write On! - Create Web Apps You Can Draw On With Silverlight 2 Wicked Code - Craft Custom Controls For Silverlight 2 Team System Foundations Windows With C++ Concurrent Affairs Going Places { End Bracket }

MSDN Magazine - August 2008

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