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POWPF Listview flickering problem
 

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  1. POWPF Listview flickering problem
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    <p>I am using a thread for reading the file and make a array of objects from the data read.A seperate thread for filtering records based on some filters is being used. I am using listview to show data for dataset I get as per above.</p> <p>While laoding a file everthing seems good but when I search,the problem exists.</p> <p>while searching when I apply filters for the 1st time, everything is okay. Now again when I apply filters, data of the previous search is show for 1 sec(kind of flicker) and then the new data according to current filter is rendered. I am using dispatcher for updating UI. Before I bind any data, I try to clear ListView ItemSource by setting it to null</p> <p>XAML code i am using is : {</p> <pre><code> &lt;ListView Name="listView1" Grid.Row="0" ItemsSource= "{Binding ElementName=Window1, Path=Entries}" AllowDrop="True" SelectionChanged="listView1_SelectionChanged" Drop="listView1_Drop"&gt; &lt;ListView.View&gt; &lt;GridView x:Name="GridView1" &gt; &lt;GridViewColumn Header="Item" DisplayMemberBinding="{Binding Item}" /&gt; &lt;GridViewColumn Header="TimeStamp" DisplayMemberBinding="{Binding TimeStamp}"/&gt; &lt;GridViewColumn Header=""&gt; &lt;GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;Image Source="{Binding Image}" Width="16" Height="16" VerticalAlignment="Top" HorizontalAlignment="Left"/&gt; &lt;/DataTemplate&gt; &lt;/GridViewColumn.CellTemplate&gt; &lt;/GridViewColumn&gt; &lt;GridViewColumn Header="Level" DisplayMemberBinding="{Binding Level}"/&gt; &lt;GridViewColumn Header="Class" DisplayMemberBinding="{Binding Class}"/&gt; &lt;GridViewColumn Header="Message" DisplayMemberBinding="{Binding Message1}" Width="250" /&gt; &lt;/GridView&gt; &lt;/ListView.View&gt; &lt;/ListView&gt; </code></pre> <p>}</p> <p>Code Behind is :</p> <pre><code>private void ClearListView() { UpdateList update = new UpdateList(UpdateListData); List&lt;LogEntry&gt; searcheddata = new List&lt;LogEntry&gt;(); searcheddata = null; listView1.ItemsSource = null; listView1.Items.Clear(); listView1.Items.Refresh(); pdDispatcher.BeginInvoke(update, DispatcherPriority.Render, searcheddata); } </code></pre> <p>psdispatcher is the dispatcher used to update the UI &amp; searchdata is function to assign datasource to listview</p>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USFredrik Hedblad
    1. USShashank Tewari
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
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      1. POWPF Listview flickering problem
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
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      1. POWPF Listview flickering problem
      1. This table or related slice is empty.
      1. VTUpMod
    1. COlogentry is the class for storing data from the file.
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      1. POWPF Listview flickering problem
      1. USShashank Tewari
    2. COThere is quite a bit of confusion in this code. For example, newing up searcheddata, then immediately setting it to null. Setting the ItemsSource to null, then Clearing and Refreshing the Items collection. I think you need to focus on what you want to do, and simplify your implementation. (See the Remarks in here: http://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol.itemssource.aspx )
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      1. POWPF Listview flickering problem
      1. USrcabr
 

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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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