WPF treeview with circular reference not updating the childTreeviewItem - WPF Discussion Boards

cjb11025-Mar-13 1:56

25-Mar-13 1:56

Solved it I think.

I mentioned that I was trying the AsyncObservableCollection, apparently if I use that then I don't want to pass TaskScheduler.FromCurrentSynchronizationContext() to the task. I don't understand why (I guess a conflict somewhere)...but not sure if I need to understand either Smile | :)

So my ObservableCollection is now defined as:

private ObservableCollection<string> _results = new AsyncObservableCollection<string>();
public ObservableCollection<string> Results
{
    get { return _results; }
    set
    {
        _results = value;

        RaisePropertyChanged("Results");
    }
}

And my tasks updated the ListBox as and when they start/finish.

So I've just got to check if cancellation works, and see if I can still use WaitAll. Ideally I'd like a message when the tasks have all been started and finished (more a WhenAll (if that even exists)), at the moment I get that in the middle. But if I use WaitAll then I don't get the async updating.

Note for any others if your using .NET 4.5 then I don't think any of this is an issue as they changed the ObversableCollection.

Re: MVVM Tasks and UI Updating

cjb11025-Mar-13 4:45

cjb110

25-Mar-13 4:45

Using TaskScheduler.Default or TaskScheduler.Current work when using the AsyncObservableCollection, its just FromCurrentSynchronizationContext that doesn't.

Re: MVVM Tasks and UI Updating

Abhinav S25-Mar-13 7:26

Abhinav S

25-Mar-13 7:26

Use the INotifyPropertyChanged event on the observable collection.
This will be a neater and simpler solution.

WP Apps - Color Search | Arctic | XKCD | Sound Meter | Speed Dial

Re: MVVM Tasks and UI Updating

cjb11025-Mar-13 7:36

cjb110

25-Mar-13 7:36

How do you mean? The ViewModel already had that, and that on its own didn't work. No items were added until the end.

private ObservableCollection<string> _results = new ObservableCollection<string>();
public ObservableCollection<string> Results
{
    get { return _results; }
    set
    {
        _results = value;

        RaisePropertyChanged("Results");
    }
}

Or do you mean create a class that derives from ObservableCollection and implement it there?

Problems on ListView Control in WPF

bikah chanda mohanta21-Mar-13 2:56

bikah chanda mohanta

21-Mar-13 2:56

Please Help me

How can i get the listview item one by one from the
selected row in WPF?

Re: Problems on ListView Control in WPF

Kenneth Haugland22-Mar-13 2:03

Kenneth Haugland

22-Mar-13 2:03

You could check the lstSomething.SelectedItems it should give you all the selected items. Then use a for each or iterate through the collection.

Route Event for Button border

Member 878633518-Mar-13 20:50

Member 8786335

18-Mar-13 20:50

i have created a control template for flashing button

<ControlTemplate x:Key="buttonTemplate" TargetType="{x:Type Button}">
 <Border x:Name="AnimatedColorButton" Width="100" Height="30" BorderThickness="2" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}">
<Border.Triggers>
<EventTrigger RoutedEvent="Border.Loaded"> <BeginStoryboard><pre lang="text">
 <Storyboard >
<DoubleAnimation Storyboard.TargetName="AnimatedColorButton"                        Storyboard.TargetProperty="Background.Opacity"
  RepeatBehavior="Forever"
 AutoReverse="True"
 To="0.0"
  Duration="0:0:0.5" ></DoubleAnimation>
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger>
                </Border.Triggers>
              
            </Border>
  </ControlTemplate>

Its displays the button with Flashing while loading.

But when i Change the border color from code behind

button1.BorderBrush = Brushes.Blue;

Then the a flashing stops .
How to active it again ?how to trigger the border.loaded event from code behind ?

WPF treeview with circular reference not updating the childTreeviewItem

geetha naidu17-Mar-13 0:39

geetha naidu

17-Mar-13 0:39

Hi All, i am attaching my class design and the xaml code which i am using to create a treeview item with circular reference. I am able to update the collecitons from the codebehind but unfortuntely it is not reflecting in the code behind. Please help me in esolving this

public class EntityDesignElement : NotifyPropertyChangedBase
   {
       private string _id;
       private ObservableCollection<EntityDesignElement> _children = new ObservableCollection<EntityDesignElement>();

       private ObservableCollection<WrapperMetadataExtension> _extensions = new ObservableCollection<WrapperMetadataExtension>();

       public ObservableCollection<WrapperMetadataExtension> Extensions
       {
           get { return _extensions; }
           set
           {
               _extensions = value;

           }
       }

       protected EntityDesignElement(EntityDesignElement parent)
       {
           Parent = parent;
           _children.CollectionChanged += delegate(object sender, NotifyCollectionChangedEventArgs args) { OnPropertyChanged("HasChildren"); };
           _children.CollectionChanged += delegate(object sender, NotifyCollectionChangedEventArgs args) { OnPropertyChanged("IsExtensionAddedToChildren"); };
           //if (_children != null)
           //    _children.CollectionChanged += delegate(object sender, NotifyCollectionChangedEventArgs args) { OnPropertyChanged("Extensions"); };
           _extensions.CollectionChanged += delegate(object sender, NotifyCollectionChangedEventArgs args) { OnPropertyChanged("IsExtensionAddedToChildren"); };
       }

       public EntityDesignElement(EntityDesignElement parent, EntityInfo info)
           : this(parent)
       {
           Name = info.Name;
           Type = info.Id;
           ElementType = "Entity";
           IsChildrenAllowed = true;

           foreach (var property in info.Properties)
           {
               Children.Add(new EntityDesignElement(this, property));
           }
       }

       public EntityDesignElement(EntityDesignElement parent, EntityPropertyInfo propertyInfo)
           : this(parent)
       {
           Name = propertyInfo.Name;
           ElementType = "Property";
           Type = propertyInfo.DataType;
           IsChildrenAllowed = (((propertyInfo.PropertyType == EntityPropertyType.Reference)
               || (propertyInfo.PropertyType == EntityPropertyType.ReferenceCollection))
               && (!IsCircularReference(Type)));

           if (IsChildrenAllowed)
           {
               var entity = ClientConnector.Current.Metadata.GetEntity(propertyInfo.DataType);
               if (entity != null)
                   foreach (var property in entity.Properties)
                   {
                       EntityDesignElement child = new EntityDesignElement(this, property);
                       //child._children.CollectionChanged += delegate(object sender, NotifyCollectionChangedEventArgs args) { OnPropertyChanged("HasChildren"); };
                       //child._extensions.CollectionChanged += delegate(object sender, NotifyCollectionChangedEventArgs args) { OnPropertyChanged("Extensions"); };
                       Children.Add(child);
                   }
           }

       }

       public void AddExtension(EntityDesignElement parent, WrapperMetadataExtension extension)
       {
           Parent.Extensions.Add(extension);
       }

       public EntityDesignElement Parent { get; private set; }

       public string Name
       {
           get { return _id; }
           set { SetAndNotifyPropertyChanged<string>("Id", ref _id, value); }
       }

       public string ElementType { get; private set; }

       public string Type { get; private set; }
       public bool IsChildrenAllowed { get; private set; }
       public bool HasChildren { get { return (_children.Count > 0); } }

       //private bool _isExtensionAddedToChildren;
       public bool IsExtensionAddedToChildren {
           get { return (Parent.Extensions.Count>0); }
           //set { _isExtensionAddedToChildren= value; }
       }


       public ObservableCollection<EntityDesignElement> Children { get { return _children; } }

       private bool IsCircularReference(string type)
       {
           if (Parent == null)
               return false;
           if (Parent.Type.Equals(type))
               return true;
           return Parent.IsCircularReference(type);
       }


       public ObservableCollection<MetadataExtension> GetMetadataExtensions()
       {
           ObservableCollection<MetadataExtension> colls = new ObservableCollection<MetadataExtension>();
           //foreach (WrapperMetadataExtensionCollectionCollection item in Extensions)
           //{
           //    colls.Add(new MetadataExtension
           //        {
           //            ExtensionType=item.ExtensionType,
           //            Property=item.ExtensionType,
           //            Parameters=item.GetParameters()
           //        });
           //}
           return colls;
       }
   }

XML

<UserControl x:Class="CeniumDesignTool.Controls.Designer.MetadataEntityControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:Utitlity="clr-namespace:CeniumDesignTool.Utilities"
              xmlns:metadata="clr-namespace:Cenium.Framework.Client.Application.ResourceModel.Metadata;assembly=Cenium.Framework.Client.Resources"
             mc:Ignorable="d" x:Name="MetadataEntityControlRoot"
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid x:Name="LayoutRoot" DataContext="{Binding ElementName=MetadataEntityControlRoot}">
        <Grid.Resources>
            <Utitlity:ExtensionConverter x:Key="extConverter"/>
            <Style TargetType="TextBlock" x:Key="txtEntityInfoStyle">
                <Setter Property="FontWeight" Value="Bold" />
                <Setter Property="HorizontalAlignment" Value="Center"/>
                <Setter Property="VerticalAlignment" Value="Center"/>
            </Style>
            <Utitlity:MetadataTemplateSeletor x:Key="TempSelector"/>
            <BitmapImage x:Key="imgLock" UriSource="pack://application:,,,/Resources/Images/lock.png" />
            <BitmapImage x:Key="imgExtension" UriSource="pack://application:,,,/Resources/Images/extension.png" />
            <HierarchicalDataTemplate x:Key="MetadataEntityParentTemplate" ItemTemplateSelector="{StaticResource ResourceKey=TempSelector}">
                <!-- bind the different data sources -->
                <HierarchicalDataTemplate.ItemsSource>

                    <MultiBinding Converter="{StaticResource extConverter}">
                        <Binding Path="Children" UpdateSourceTrigger="PropertyChanged"/>
                        <Binding Path="Extensions" UpdateSourceTrigger="PropertyChanged"/>

                    </MultiBinding>
                </HierarchicalDataTemplate.ItemsSource>
                <Border BorderBrush="Black" Margin="2,2,2,2" BorderThickness="1" CornerRadius="17" Background="Gray" Padding="0,0,5,0">
                    <Grid Width="Auto" MinWidth="200">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition />
                        </Grid.RowDefinitions>
                        <TextBlock Grid.Column="1" Text="{Binding Type}" 
					Margin="0" HorizontalAlignment="Center" VerticalAlignment="Center" Style="{StaticResource txtEntityInfoStyle}" />
                        <Rectangle Grid.Column="2" Height="20" Width="20" Margin="5" Stroke="Black" HorizontalAlignment="Right" VerticalAlignment="Center">
                            <Rectangle.Fill>
                                <ImageBrush ImageSource="{StaticResource imgLock}"/>
                            </Rectangle.Fill>
                        </Rectangle>
                    </Grid>
                </Border>
            </HierarchicalDataTemplate>
            <HierarchicalDataTemplate x:Key="MeatadataEntityExtensions" ItemsSource="{Binding Path=Parameters}">
                <!--ItemsSource= "{Binding Path=Parameters}"-->
                <Grid Width="250">
                    <Border BorderBrush="Black" BorderThickness="1" CornerRadius="17" Margin="2,2,2,2" Padding="0,0,5,0" Background="LightGreen">
                        <StackPanel Width="auto" MinWidth="200" Orientation="Horizontal">
                            <TextBlock Margin="5" Text="{Binding ExtensionType, UpdateSourceTrigger=PropertyChanged}"  VerticalAlignment="Center" Style="{StaticResource txtEntityInfoStyle}" ></TextBlock>

                            <TextBlock Margin="5" Text="{Binding Property}"  VerticalAlignment="Center" Grid.Column="1" Style="{StaticResource txtEntityInfoStyle}" ></TextBlock>

                            <Rectangle Height="20" Width="20" Margin="5" Stroke="Black" HorizontalAlignment="Right">
                                <Rectangle.Fill>
                                    <ImageBrush ImageSource="{StaticResource imgExtension}"/>
                                </Rectangle.Fill>
                            </Rectangle>
                        </StackPanel>
                    </Border>
                </Grid>
                <!--<HierarchicalDataTemplate.ItemTemplate>
                    <HierarchicalDataTemplate >
                        <Border BorderBrush="Black" BorderThickness="1" CornerRadius="17" Margin="2,2,2,2"  Padding="0,0,5,0" Background="LightGreen">
                            <StackPanel Width="auto" MinWidth="250" Orientation="Horizontal">
                                <TextBlock Margin="5" Text="{Binding ExtensionType}"  VerticalAlignment="Center" Style="{StaticResource txtEntityInfoStyle}" ></TextBlock>
                                <TextBlock Margin="5" Text="{Binding Value}"  Style="{StaticResource txtEntityInfoStyle}" ></TextBlock>
                                <TextBlock Margin="5" Text=" : " Style="{StaticResource txtEntityInfoStyle}" />
                                <TextBlock Margin="5" Text="{Binding ValueType}" Style="{StaticResource txtEntityInfoStyle}" />
                                <Rectangle Height="20" Width="20" Margin="5" Stroke="Black" HorizontalAlignment="Right">
                                    <Rectangle.Fill>
                                        <ImageBrush ImageSource="{StaticResource imgExtension}"/>
                                    </Rectangle.Fill>
                                </Rectangle>
                            </StackPanel>
                        </Border>
                    </HierarchicalDataTemplate>
                </HierarchicalDataTemplate.ItemTemplate>-->
            </HierarchicalDataTemplate>

            <DataTemplate x:Key="MeatadataEntityProperties">

                <Border BorderBrush="Black" BorderThickness="1" CornerRadius="17"  Padding="0,0,0,0" Background="Gray" Margin="2,2,2,2">
                    <!--<StackPanel Width="200" Orientation="Horizontal">
                     
                       
                <TextBlock Margin="5" Text="{Binding Value}" ></TextBlock>
                <TextBlock Margin="5" Text=" : "/>
                <TextBlock Margin="5" Text="{Binding ValueType}"/>
                    <Rectangle Height="20" Width="20" Margin="5" Stroke="Black" HorizontalAlignment="Right">
                        <Rectangle.Fill>
                            <ImageBrush ImageSource="lock.png"/>
                        </Rectangle.Fill>
                    </Rectangle>
                </StackPanel>-->
                    <Grid Width="auto" MinWidth="200" HorizontalAlignment="Center" VerticalAlignment="Center">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition />
                        </Grid.RowDefinitions>
                        <TextBlock Grid.Column="0" Margin="20,0,0,0" Text="{Binding Name}" Style="{StaticResource txtEntityInfoStyle}"></TextBlock>
                        <TextBlock Grid.Column="1" Margin="0" Text=" : " Style="{StaticResource txtEntityInfoStyle}"/>
                        <TextBlock Grid.Column="2" Margin="0" Text="{Binding PropertyType}" Style="{StaticResource txtEntityInfoStyle}"/>
                        <TextBlock Grid.Column="3" Margin="0" Text=" ( " Style="{StaticResource txtEntityInfoStyle}"/>
                        <TextBlock Grid.Column="4" Margin="0" Text="{Binding Reference}" Style="{StaticResource txtEntityInfoStyle}"/>
                        <TextBlock Grid.Column="5" Margin="0" Text=" ) " Style="{StaticResource txtEntityInfoStyle}"/>
                        <Rectangle Grid.Column="6" Height="20" Width="20" Margin="5" Stroke="Black" HorizontalAlignment="Right">
                            <Rectangle.Fill>
                                <ImageBrush ImageSource="{StaticResource imgLock}"/>
                            </Rectangle.Fill>
                        </Rectangle>
                    </Grid>
                </Border>
            </DataTemplate>
            
            <HierarchicalDataTemplate x:Key="ClassReferenceMetadataEntity" ItemsSource="{Binding Path=Children}">
                <Border BorderBrush="Black" Margin="2,2,2,2" BorderThickness="1" CornerRadius="17" Background="Gray" Padding="0,0,0,0">
                    <Grid Width="Auto" MinWidth="200">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition />
                        </Grid.RowDefinitions>
                        <Grid Grid.Column="1">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition/>
                                <ColumnDefinition/>
                                <ColumnDefinition/>
                            </Grid.ColumnDefinitions>
                            <TextBlock  Text="{Binding Name}" Grid.Column="0"
					Margin="0" HorizontalAlignment="Center" VerticalAlignment="Center" Style="{StaticResource txtEntityInfoStyle}" />
                            <TextBlock  Text=":"  Grid.Column="1"
					Margin="0" HorizontalAlignment="Center" VerticalAlignment="Center" Style="{StaticResource txtEntityInfoStyle}" />
                            <TextBlock  Text="{Binding Type}"  Grid.Column="2"
					Margin="0" HorizontalAlignment="Center" VerticalAlignment="Center" Style="{StaticResource txtEntityInfoStyle}" />
                        </Grid>
                        
                        <Rectangle Grid.Column="2" Height="20" Width="20" Margin="5" Stroke="Black" HorizontalAlignment="Right" VerticalAlignment="Center">
                            <Rectangle.Fill>
                                <ImageBrush ImageSource="{StaticResource imgLock}"/>
                            </Rectangle.Fill>
                        </Rectangle>
                    </Grid>
                </Border>
            </HierarchicalDataTemplate>
        </Grid.Resources>
        <TreeView x:Name="ListViewExtensionTypesDesign" AllowDrop="True" Width="auto" Height="auto" ItemsSource="{Binding}" ItemTemplate="{StaticResource MetadataEntityParentTemplate}" TreeViewItem.Selected="ListViewExtensionTypesDesign_Selected">
            <!--<TreeView.ItemContainerStyle>
                <Style TargetType="{x:Type TreeViewItem}">
                    <EventSetter Event="TreeViewItem.DragOver"  Handler="treeView_DragOver"/>
                    <EventSetter Event="TreeViewItem.Drop" Handler="treeView_Drop"/>
                    <EventSetter Event="TreeViewItem.MouseMove" Handler="treeView_MouseMove"/>
                    <EventSetter Event="TreeViewItem.MouseDown" Handler="treeView_MouseDown"/>
                </Style>
            </TreeView.ItemContainerStyle>-->
        </TreeView>

        <!--TreeViewItem.Selected="ListViewExtensionTypesDesign_Selected" ItemTemplate="{StaticResource MetadataEntityParentTemplate}"  ItemContainerStyle="{DynamicResource TreeViewItemStyle1}" BorderBrush="{x:Null}" BorderThickness="0" Style="{DynamicResource TreeViewStyle1}"-->
    </Grid>
</UserControl>

Geetha

Stack panel

columbos1492715-Mar-13 9:35

columbos14927

15-Mar-13 9:35

Hello,
I want to add dynamically many controls to a window.
I wanted to use a stack panel container but a stack panel has either horizontal or vertical orientation.
I want to add the control horizontally and when there are three user controls in one row i want to go to next row and start adding the controls there and so on.
The user can also delete a control so the other controls have to be reorganized automatically.

Any one has an idea how to do it?

Thanks.

Re: Stack panel

Gerry Schmitz15-Mar-13 11:01

Gerry Schmitz

15-Mar-13 11:01

Use a "UniformGrid" with 3 columns for organizing the controls, and the .Children.Add method to add controls.

Use the .Children.Remove method to "delete" a control.

Re: Stack panel

Mycroft Holmes15-Mar-13 13:30

Mycroft Holmes

15-Mar-13 13:30

I used a wrap panel from the tool kit for this, bind it to a collection and add/delete the items in the collection.

XML

<ItemsControl Grid.Row="1"  ItemsSource="{Binding FleetList}" HorizontalAlignment="Center" VerticalAlignment="Center">
					<ItemsControl.ItemsPanel>
						<ItemsPanelTemplate>
							<toolkit:WrapPanel/>
						</ItemsPanelTemplate>
					</ItemsControl.ItemsPanel>
					<ItemsControl.ItemTemplate>
						<DataTemplate>
							<HyperlinkButton Click="HyperlinkButton_Click" Tag="{Binding Path=FleetID}" HorizontalContentAlignment="Center" >
								<Grid HorizontalAlignment="Center" >
									<Grid.RowDefinitions>
										<RowDefinition/>
										<RowDefinition/>
									</Grid.RowDefinitions>
									<Image Grid.Row="0" Stretch="None" Source="{Binding Path=FleetLogoUri}" HorizontalAlignment="Center" ImageFailed="GetDefaultImage" Loaded="ImageLoaded" />
									<TextBlock Grid.Row="1" Foreground="Blue" Text="{Binding Path=Fleet}" HorizontalAlignment="Center" />
								</Grid>
							</HyperlinkButton>
						</DataTemplate>
					</ItemsControl.ItemTemplate>
				</ItemsControl>

Never underestimate the power of human stupidity
RAH

How to add multiple button into same datacell in DataGrid column

Jayantha Bandara15-Mar-13 0:45

Jayantha Bandara

15-Mar-13 0:45

How to add multiple button into same datacell in DataGrid column. i know how to add one button into datacell but i want to add two button into same cell please let me know that? please help me Frown | :(

Re: How to add multiple button into same datacell in DataGrid column

Pete O'Hanlon15-Mar-13 1:14

Pete O'Hanlon

15-Mar-13 1:14

Use a DataGridTemplateColumn and host the buttons inside there. Have a look at this[^].

I was brought up to respect my elders. I don't respect many people nowadays.

CodeStash - Online Snippet Management | My blog | MoXAML PowerToys | Mole 2010 - debugging made easier

Re: How to add multiple button into same datacell in DataGrid column

Jayantha Bandara15-Mar-13 1:41

Jayantha Bandara

15-Mar-13 1:41

Yes that i have done so cool Blush | :O

<sdk:DataGridTemplateColumn>
                           <sdk:DataGridTemplateColumn.CellTemplate>
                               <DataTemplate>
                                   <StackPanel Orientation="Horizontal" Width="170"  HorizontalAlignment="Right" VerticalAlignment="Bottom">
                                        <Button Name="btn_Close" Style="{StaticResource FormContentButtonStyle_LA}" Content="Close" Click="btn_Close_Click" />
                                       <Button Name="btn_Delete" Style="{StaticResource FormContentButtonStyle_LA}" Visibility="{Binding IsDeleted, Mode=TwoWay}"  Content="Delete" Click="btn_Delete_Click" />
                                   </StackPanel>
                               </DataTemplate>
                           </sdk:DataGridTemplateColumn.CellTemplate>
                       </sdk:DataGridTemplateColumn>

Re: How to add multiple button into same datacell in DataGrid column

Mycroft Holmes15-Mar-13 13:26

Mycroft Holmes

15-Mar-13 13:26

The common convention is to up vote a good answer (little arrows that appear on the right of the answer)

Never underestimate the power of human stupidity
RAH

Loading XAML at runtime

Jayme6514-Mar-13 8:11

Jayme65

14-Mar-13 8:11

Hi,

I'm working on loading xaml code at runtime.
Until now, I can do it with XAML files which are set as "Resource"...but I would like to load it from a user's folder (let's say the "Desktop Folder" for example)
How should I please proceed?

The XAML example file, loaded as resource file in my project (but I would like to use it "independently")

XML

<Grid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Border Width="385" Height="385" Margin="0,0,0,0" HorizontalAlignment="Left" VerticalAlignment="Top" CornerRadius="8" Background="#FF0085C8">
</Grid>

The Application XAML code

XML

<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
</Window>

The Application VB.Net code

Class MainWindow
    Private Sub MainWindow_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded
        Dim GridUri As New Uri("Resources\theme.xaml", UriKind.Relative)
        Dim sri As Windows.Resources.StreamResourceInfo = Application.GetResourceStream(GridUri)
        Dim xrdr As New System.Windows.Markup.XamlReader()
        Dim grd As Grid = CType(xrdr.LoadAsync(sri.Stream), Grid)
        Me.Content = grd
    End Sub
End Class

Thank you!

Re: Loading XAML at runtime

marimuthu2620-Mar-13 3:54

marimuthu26

20-Mar-13 3:54

if your application is WPF application you can load a physical file

Imports System.Windows.Markup

Class MainWindow

    Private Sub Window_Loaded(sender As System.Object, e As System.Windows.RoutedEventArgs)
        Dim objXaml = XamlReader.Load(IO.File.Open(Environment.CurrentDirectory & "Resource\theme.xaml", IO.FileMode.Open))
    End Sub
End Class

if it was a silverlight application you cant do that Frown | :(

... Marimuthu

WPF First Start Performance

savbace14-Mar-13 2:16

savbace

14-Mar-13 2:16

Hi! I have some WPF windows built in a class library. Also I have unmanaged app that calls these windows through ComVisible interface.

The problem: I have a big delay on calling WPF windows first time.
I suppose it happens because WPF engine loading.

Please, suggest some ideas or workarounds on performance improvements.
Thanks!

Re: WPF First Start Performance

Richard MacCutchan14-Mar-13 3:04

Richard MacCutchan

14-Mar-13 3:04

If you want performance improvements then you should not be using managed code from an unmanaged application.

Use the best guess

WPF MVVM application

Member 878633514-Mar-13 1:49

Member 8786335

14-Mar-13 1:49

Iam new to WPF .can anybody give some sample application with feature like add,delete and update data from grid control using MVVM approach.

Bit confused with this approach.

Thanks in advance.

Re: WPF MVVM application

NotPolitcallyCorrect14-Mar-13 2:50

NotPolitcallyCorrect

14-Mar-13 2:50

Member 8786335 wrote:
sample application

Did you try searching CodeProject and see if any of the projects there help you at all. There is an extensive WPF section......

Re: WPF MVVM application

Wayne Gaylard14-Mar-13 7:53

Wayne Gaylard

14-Mar-13 7:53

Josh Smiths MSDN[^] article goes through the whole process

When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman

Re: WPF MVVM application

Abhinav S18-Mar-13 7:09

Abhinav S

18-Mar-13 7:09

Try
http://www.astaticstate.com/2010/04/silverlight-4-using-mvvm-patter-ria.html[^]
http://msdn.microsoft.com/en-us/silverlight/bb187401.aspx[^]

WP Apps - Color Search | Arctic | XKCD | Sound Meter | Speed Dial

Re: WPF MVVM application

_Maxxx_1-Apr-13 19:52

_Maxxx_

1-Apr-13 19:52

You could try reading my article series on MVVM - it's a basic example of editing from a grid using MVVM with no framework (see my sig for a link)

MVVM# - See how I did MVVM my way
___________________________________________
Man, you're a god. - walterhevedeich 26/05/2011

.\\axxx
(That's an 'M')

silverlight file upload, error not displays on browser

vpraveen12-Mar-13 21:30

vpraveen

12-Mar-13 21:30

Hi,

I have a silverlight project for file uploading. I have one problem.i.e., When uploading a file from browser, It doesn't displays the error. But when uploading a file from localhost, it displays the error.

For your reference : http://epstechno.com/metroepstechno/Default.aspx

Here you can check the problem what i mentioned above.

Please reply as soon as possible.

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