How to improve performance of WPF

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C#

WPF

Hi all,

I develop an application C# WPF.

In my XAML i have an ItemsControl with my List in ItemsSource, in binding. For example :

<ItemsControl x:Name="lvDataBinding" Foreground="AliceBlue" ItemsSource="{Binding LstAvis}" Margin="0" ScrollViewer.CanContentScroll="True" VirtualizingPanel.IsVirtualizing="True" VerticalAlignment="Top">
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <Border BorderBrush="White" BorderThickness="1" CornerRadius="3" Margin="{Binding strMargin}" Opacity="{Binding dblOpacityCurrent}" HorizontalAlignment="Left" VerticalAlignment="Top">
                            <Grid Width="{Binding dblWidth}" Height="{Binding strHeightGrid}" Tag="{Binding strNumAvis}" Margin="0.1" Background="{Binding scbColorCurrentSelected}"  >
                           </Grid>
                        </Border>
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
                <ItemsControl.ItemsPanel>
                    <ItemsPanelTemplate>
                        <UniformGrid Columns="1"/>
                    </ItemsPanelTemplate>
                </ItemsControl.ItemsPanel>
            </ItemsControl>

Then in my behind code i have a function in a thread to fill a list :

public void NewConstruct_View()
        {
            Application.Current.Dispatcher.Invoke(new Action(() => _lstAvistemp.Clear()));

            Dispatcher.Invoke(new Action(() => Mouse.OverrideCursor = Cursors.Wait));

            //Insere la liste dans l'objet qui permettra son affichage
            for (int i = 0; i <= dt_DATA.Rows.Count - 1; i++)
            {
                Avis = new CL_Avis();
              
                Avis.strNumAvis = dt_DATA.Rows[i]["QMNUM"].ToString();
        
                Application.Current.Dispatcher.Invoke(new Action(() => _lstAvistemp.Add(Avis)));
            }

            

            Dispatcher.Invoke(new Action(() => LstAvis.ReplaceRange(_lstAvistemp)));
            Dispatcher.Invoke(new Action(() => { }), DispatcherPriority.ContextIdle, null);
        }

But my application need 5 seconds to execute

Dispatcher.Invoke(new Action(() => { }), DispatcherPriority.ContextIdle, null);

and display my grid.

I have only 500 rows, i think it's very slow.

I simplified the code for reading, but i have only about 20 fields (it's not a lot...)

I worked in a thread, my list in a list of type RangeOBservableCollection.

Thank you for your help.

What I have tried:

I saw i have had some exceptions :

Quote:

System.Windows.Data Error: 23 : Cannot convert '<null>' from type '<null>' to type 'System.Windows.Visibility' for 'en-US' culture with default conversions; consider using Converter property of Binding. NotSupportedException:'System.NotSupportedException: Conversion de EnumConverter impossible à partir de (null).
à System.ComponentModel.TypeConverter.GetConvertFromException(Object value)
à System.ComponentModel.TypeConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
à System.ComponentModel.EnumConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
à MS.Internal.Data.DefaultValueConverter.ConvertHelper(Object o, Type destinationType, DependencyObject targetElement, CultureInfo culture, Boolean isForward)'

I corrected this exception. I had a variable for visibility in my binding null, i filled this variable. It's ok.