Re: Datagrid is not updating the values after changing the collection in the ViewModel in WPF - WPF Discussion Boards

Re: Add Dictionary in ObsavableCollection

14-May-16 22:07

You can't directly do this. The change notification has to come directly from the object that is changing so the dictionary has to raise the notification.

Have a search for an ObservableDictionary implementation instead. Here's one I found with a quick Google. ObservableDictionary<TKey, TValue> (C#) | Shimmy on .NET[^]

This space for rent

Richard Deeming16-May-16 1:18

Richard Deeming

16-May-16 1:18

Try using this class from the Windows Samples for Parallel Programming with the .NET Framework[^]:

//--------------------------------------------------------------------------
// 
//  Copyright (c) Microsoft Corporation.  All rights reserved. 
// 
//  File: ObservableConcurrentDictionary.cs
//
//--------------------------------------------------------------------------

using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Threading;
using System.Diagnostics;

namespace System.Collections.Concurrent
{
    /// <summary>
    /// Provides a thread-safe dictionary for use with data binding.
    /// </summary>
    /// <typeparam name="TKey">Specifies the type of the keys in this collection.</typeparam>
    /// <typeparam name="TValue">Specifies the type of the values in this collection.</typeparam>
    [DebuggerDisplay("Count={Count}")]
    public class ObservableConcurrentDictionary<TKey, TValue> :
        ICollection<KeyValuePair<TKey, TValue>>, IDictionary<TKey, TValue>,
        INotifyCollectionChanged, INotifyPropertyChanged
    {
        private readonly SynchronizationContext _context;
        private readonly ConcurrentDictionary<TKey, TValue> _dictionary;

        /// <summary>
        /// Initializes an instance of the ObservableConcurrentDictionary class.
        /// </summary>
        public ObservableConcurrentDictionary()
        {
            _context = AsyncOperationManager.SynchronizationContext;
            _dictionary = new ConcurrentDictionary<TKey, TValue>();
        }

        /// <summary>Event raised when the collection changes.</summary>
        public event NotifyCollectionChangedEventHandler CollectionChanged;
        /// <summary>Event raised when a property on the collection changes.</summary>
        public event PropertyChangedEventHandler PropertyChanged;

        /// <summary>
        /// Notifies observers of CollectionChanged or PropertyChanged of an update to the dictionary.
        /// </summary>
        private void NotifyObserversOfChange()
        {
            var collectionHandler = CollectionChanged;
            var propertyHandler = PropertyChanged;
            if (collectionHandler != null || propertyHandler != null)
            {
                _context.Post(s =>
                {
                    if (collectionHandler != null)
                    {
                        collectionHandler(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
                    }
                    if (propertyHandler != null)
                    {
                        propertyHandler(this, new PropertyChangedEventArgs("Count"));
                        propertyHandler(this, new PropertyChangedEventArgs("Keys"));
                        propertyHandler(this, new PropertyChangedEventArgs("Values"));
                    }
                }, null);
            }
        }

        /// <summary>Attempts to add an item to the dictionary, notifying observers of any changes.</summary>
        /// <param name="item">The item to be added.</param>
        /// <returns>Whether the add was successful.</returns>
        private bool TryAddWithNotification(KeyValuePair<TKey, TValue> item)
        {
            return TryAddWithNotification(item.Key, item.Value);
        }

        /// <summary>Attempts to add an item to the dictionary, notifying observers of any changes.</summary>
        /// <param name="key">The key of the item to be added.</param>
        /// <param name="value">The value of the item to be added.</param>
        /// <returns>Whether the add was successful.</returns>
        private bool TryAddWithNotification(TKey key, TValue value)
        {
            bool result = _dictionary.TryAdd(key, value);
            if (result) NotifyObserversOfChange();
            return result;
        }

        /// <summary>Attempts to remove an item from the dictionary, notifying observers of any changes.</summary>
        /// <param name="key">The key of the item to be removed.</param>
        /// <param name="value">The value of the item removed.</param>
        /// <returns>Whether the removal was successful.</returns>
        private bool TryRemoveWithNotification(TKey key, out TValue value)
        {
            bool result = _dictionary.TryRemove(key, out value);
            if (result) NotifyObserversOfChange();
            return result;
        }

        /// <summary>Attempts to add or update an item in the dictionary, notifying observers of any changes.</summary>
        /// <param name="key">The key of the item to be updated.</param>
        /// <param name="value">The new value to set for the item.</param>
        /// <returns>Whether the update was successful.</returns>
        private void UpdateWithNotification(TKey key, TValue value)
        {
            _dictionary[key] = value;
            NotifyObserversOfChange();
        }

        #region ICollection<KeyValuePair<TKey,TValue>> Members
        void ICollection<KeyValuePair<TKey, TValue>>.Add(KeyValuePair<TKey, TValue> item)
        {
            TryAddWithNotification(item);
        }

        void ICollection<KeyValuePair<TKey, TValue>>.Clear()
        {
            ((ICollection<KeyValuePair<TKey, TValue>>)_dictionary).Clear();
            NotifyObserversOfChange();
        }

        bool ICollection<KeyValuePair<TKey, TValue>>.Contains(KeyValuePair<TKey, TValue> item)
        {
            return ((ICollection<KeyValuePair<TKey, TValue>>)_dictionary).Contains(item);
        }

        void ICollection<KeyValuePair<TKey, TValue>>.CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex)
        {
            ((ICollection<KeyValuePair<TKey, TValue>>)_dictionary).CopyTo(array, arrayIndex);
        }

        int ICollection<KeyValuePair<TKey, TValue>>.Count
        {
            get { return ((ICollection<KeyValuePair<TKey, TValue>>)_dictionary).Count; }
        }

        bool ICollection<KeyValuePair<TKey, TValue>>.IsReadOnly
        {
            get { return ((ICollection<KeyValuePair<TKey, TValue>>)_dictionary).IsReadOnly; }
        }

        bool ICollection<KeyValuePair<TKey, TValue>>.Remove(KeyValuePair<TKey, TValue> item)
        {
            TValue temp;
            return TryRemoveWithNotification(item.Key, out temp);
        }
        #endregion

        #region IEnumerable<KeyValuePair<TKey,TValue>> Members
        IEnumerator<KeyValuePair<TKey, TValue>> IEnumerable<KeyValuePair<TKey, TValue>>.GetEnumerator()
        {
            return ((ICollection<KeyValuePair<TKey, TValue>>)_dictionary).GetEnumerator();
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            return ((ICollection<KeyValuePair<TKey, TValue>>)_dictionary).GetEnumerator();
        }
        #endregion

        #region IDictionary<TKey,TValue> Members
        public void Add(TKey key, TValue value)
        {
            TryAddWithNotification(key, value);
        }

        public bool ContainsKey(TKey key)
        {
            return _dictionary.ContainsKey(key);
        }

        public ICollection<TKey> Keys
        {
            get { return _dictionary.Keys; }
        }

        public bool Remove(TKey key)
        {
            TValue temp;
            return TryRemoveWithNotification(key, out temp);
        }

        public bool TryGetValue(TKey key, out TValue value)
        {
            return _dictionary.TryGetValue(key, out value);
        }

        public ICollection<TValue> Values
        {
            get { return _dictionary.Values; }
        }

        public TValue this[TKey key]
        {
            get { return _dictionary[key]; }
            set { UpdateWithNotification(key, value); }
        }
        #endregion
    }
}

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: Add Dictionary in ObsavableCollection

indian14316-May-16 6:35

Datagrid is not updating the values after changing the collection in the ViewModel in WPF

16-May-16 6:35

Thank you very much.

Thanks,

Abdul Aleem

"There is already enough hatred in the world lets spread love, compassion and affection."

indian14313-May-16 11:02

Re: Datagrid is not updating the values after changing the collection in the ViewModel in WPF

13-May-16 11:02

Hi All,

I have a Datagrid in a Window container as below

<DataGrid HorizontalAlignment="Left" Margin="103,188,0,0" VerticalAlignment="Top" Height="98" Width="313"
                 ItemsSource="{Binding Path=DictionaryName, Mode=TwoWay}" ></DataGrid>

And Collection in the ViewModel as below

public Dictionary<short, String> DictionaryName
       {
           get { return _testData.DictionaryName; }
           set { _testData.DictionaryName = value; NotifyPropertyChanged("DictionaryName"); }
       }

public void AddAnItem()
       {
           int t = DictionaryName.Max(x => x.Key) + 1;

           DictionaryName.Add(short.Parse(t.ToString()), t.ToString() + "Number");
       }

When Button click calls the Command then it is adding an item into the Dictionary but that is not being added into the Datagrid eventhough I kept the Mode as TwoWay?

Can anybody please help me any sort of help may be a code snippet, a link or even a suggestion also helps me?

Please its very urgent and I am new to the WPF, thanks in advance.

Thanks,

Abdul Aleem

"There is already enough hatred in the world lets spread love, compassion and affection."

Richard Deeming13-May-16 11:16

Richard Deeming

13-May-16 11:16

The Dictionary<TKey, TValue> class doesn't raise an event when the collection is modified. WPF has no way to know that you've added an item.

You'll need to raise a PropertyChanged event for the collection to tell WPF that it has changed:

public void AddAnItem()
{
    int t = DictionaryName.Keys.Max() + 1;
    DictionaryName.Add((short)t, t + "Number");
    NotifyPropertyChanged("DictionaryName");
}

NB: You can use an explicit cast to convert an int to a short; there's no need to convert it to a string and then parse it back to a short.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: Datagrid is not updating the values after changing the collection in the ViewModel in WPF

indian14313-May-16 11:44

Re: Datagrid is not updating the values after changing the collection in the ViewModel in WPF

13-May-16 11:44

Hi,

I did that (I have added NotifyPropertyChanged method in the AddAnItem() method) still my Datagrid is not getting updated according to the collection change.

public void AddAnItem()
{
    int t = DictionaryName.Keys.Max() + 1;
    DictionaryName.Add((short)t, t + "Number");
    NotifyPropertyChanged("DictionaryName");
}

My NotitfyProertyChanged method is written as below, do I have any error in there?

private void NotifyPropertyChanged(string propertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (null != handler)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }

The value in the TextBox is getting added to the DictionaryName collection but is not getting displayed into the DataGrid, I tried all sorts of options, but didn't work.

<Window x:Class="TestWPFApplication.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"
        xmlns:local="using:TestWPFApplication">
    <Grid>
        <Label Content="Enter Name" HorizontalAlignment="Left" Margin="58,62,0,0" VerticalAlignment="Top" Name="lblName"/>
        <TextBox Text="{Binding Name, Mode=OneTime}"  HorizontalAlignment="Left" Height="22" Margin="160,64,0,0" TextWrapping="Wrap" Name="txtName" VerticalAlignment="Top" Width="120"/>
        <Button Content="Save" HorizontalAlignment="Left" Margin="180,142,0,0" VerticalAlignment="Top" Width="74" Name="btnSave"
                Command="{Binding Path=TestCommand}"/>
        <Button Content="Save Specific" HorizontalAlignment="Left" Margin="277,142,0,0" VerticalAlignment="Top" Width="74" Name="btnSaveSpecific"
                Command="{Binding Path=TestSpecificCommand}"
                CommandParameter="{Binding ElementName=txtName, Path=Text}" />
        <DataGrid HorizontalAlignment="Left" Margin="103,188,0,0" VerticalAlignment="Top" Height="98" Width="313" 
                  ItemsSource="{Binding Path=DictionaryName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" AutoGenerateColumns="True" >

<pre>
    </DataGrid>

</Grid>

Anybody please help me man, even suggestion just to execute this is also fine.

Thanks,

Abdul Aleem

"There is already enough hatred in the world lets spread love, compassion and affection."

modified 13-May-16 19:48pm.

indian14313-May-16 21:09

Re: Datagrid is not updating the values after changing the collection in the ViewModel in WPF

13-May-16 21:09

I tried with ObservableCollection also, with ObservableCollection datagrid is filling up a row every time (means the collection is filling up) but the value is not showing up there, can anybody please help me any sort of help.
I have my code in View as below

<Window x:Class="TestWPFApplication.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"
        xmlns:local="using:TestWPFApplication">
    <Grid>
        <Label Content="Enter Name" HorizontalAlignment="Left" Margin="58,62,0,0" VerticalAlignment="Top" Name="lblName"/>
        <TextBox Text="{Binding Name, Mode=OneWay}"  HorizontalAlignment="Left" Height="22" Margin="160,64,0,0" TextWrapping="Wrap" Name="txtName" VerticalAlignment="Top" Width="120"/>
        <Button Content="Save" HorizontalAlignment="Left" Margin="180,142,0,0" VerticalAlignment="Top" Width="74" Name="btnSave"
                Command="{Binding Path=TestCommand}"/>
        <Button Content="Save Specific" HorizontalAlignment="Left" Margin="277,142,0,0" VerticalAlignment="Top" Width="74" Name="btnSaveSpecific"
                Command="{Binding Path=TestSpecificCommand}"
                CommandParameter="{Binding ElementName=txtName, Path=Text}" />
        <DataGrid HorizontalAlignment="Left" Margin="103,188,0,0" VerticalAlignment="Top" Height="98" Width="313" 
             IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding Path=DictionaryNames, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
                  AutoGenerateColumns="False"  >
            <DataGrid.Columns>
                <DataGridTextColumn Header="Name of Employee" Binding="{Binding Name}" />
            </DataGrid.Columns> 
        </DataGrid>

<pre>
</Grid>

My ViewModel

public class TestViewModel : INotifyPropertyChanged
    {
        TestData _testData;

        public TestCommand TestCommand { get; set; }
        public TestSpecificCommand TestSpecificCommand { get; set; }

        public TestViewModel()
        {
            _testData = new TestData();

            this.TestCommand = new TestCommand(this);

            this.TestSpecificCommand = new TestSpecificCommand(this);
            _dictionaryNames = new ObservableCollection<String>();
        }

        private string _name;
        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }

        ObservableCollection<String> _dictionaryNames;
        public ObservableCollection<String> DictionaryNames
        {
            get { return _dictionaryNames; }
            set { _dictionaryNames = value; NotifyPropertyChanged("DictionaryNames"); }
        }

        public Dictionary<short, String> DictionaryName
        {
            get { return _testData.DictionaryName; }
            set { _testData.DictionaryName = value; NotifyPropertyChanged("DictionaryName"); }
        }        

        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(string propertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (null != handler)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        public void AddAnItem()
        {
            int t ;

            if ((DictionaryName == null) || (DictionaryName.Count()<=0))
                t = 1;
            else
               t = DictionaryName.Max(x => x.Key) + 1;

            DictionaryName.Add((short)t, t.ToString() + "Number");
            NotifyPropertyChanged("DictionaryNames");
        }

        public void AddAnItem(string _name)
        {
            int t;

        if ((DictionaryName == null) || (DictionaryName.Count() <= 0))
                t = 1;
            else
                t = (DictionaryName.Count <= 0) ? 1 : DictionaryName.Max(x => x.Key) + 1;

            DictionaryName.Add(short.Parse(t.ToString()), _name);
            _dictionaryNames.Add(_name);
            NotifyPropertyChanged("DictionaryNames");
        }        
    }

Thanks,

Abdul Aleem

"There is already enough hatred in the world lets spread love, compassion and affection."

Pete O'Hanlon14-May-16 3:39

14-May-16 3:39

Abdul, when adding or removing items from a collection, you have to raise an INotifyCollectionChanged event to notify the items that the number of rows has changed. This is baked into ObservableCollection.

This space for rent

Convert This XAML To C#

Kevin Marois12-May-16 13:45

Add a check box and delete multiple rows from DataGrid in WPF

12-May-16 13:45

[UPDATE]
I opened Snoop and dragged over my window. It popped up a message about "Snoop has noticed windows running in multiple dispatchers..."

As I was reading it my content appeared. IF I DON'T SNOOOP, IT BEHAVE AS BELOW.
.
.
.
.

I've got this tab control that is defined in XAML. It's an outer TabControl and it's tab items contain their own sub tabs:

I want to convert it to C# so I can load it at runtime.

<TabControl x:Name="mainTabControl"
            ItemsSource="{Binding TabItems}"
            SelectedItem="{Binding SelectedTabItem}"
            BorderBrush="{DynamicResource MainTab.BorderBrush}"
            Style="{DynamicResource MainTab.TabControl.Style}">

<pre>
<userControl:ToolBarTabItem x:Name="ScopeTabItem"
                            DataContext="{Binding ScopeViewModel}"
                            Header="{DynamicResource Maintab.Oscilloscope.Label}"
                            IsTabEnabled="{Binding Path=IsTabAvailable}"
                            TabType="Oscilloscope">

    <TabControl Style="{DynamicResource InnerTabControl.Style}" 
                SelectedIndex="{Binding InnerTabSelectedIndex}"
                ItemContainerStyle="{DynamicResource InnerTab.SelectedTabItem.Style}"<br />
                ItemTemplate="{DynamicResource InnerTab.ViewPort.Header}" 
                ItemsSource="{Binding OscilloscopeViewPortItems}"
                ContentTemplate="{StaticResource TabControlTemplate}"/>

</userControl:ToolBarTabItem>

I added the TabItems collection in the VM and bound it to the outter TabControl(above), then tried the following. The outter tab shows up OK, but the inner

private void LoadTabs()
{
    TabItems = new ObservableCollection<ToolBarTabItem>();

    var scopeTab = AddTab();
    TabItems.Add(scopeTab);
}

private ToolBarTabItem AddTab()
{
    ToolBarTabItem tab = new ToolBarTabItem();

    // Outter tab item
    tab.DataContext = ScopeViewModel;
    tab.Header = GetStringFromResource("Maintab.Oscilloscope.Label");
    tab.TabType = Tabs.Oscilloscope;

    Binding isTabAvailableBinding = new Binding();
    isTabAvailableBinding.Path = new PropertyPath("IsTabAvailable");
    isTabAvailableBinding.Source = ScopeViewModel;
    BindingOperations.SetBinding(tab, ToolBarTabItem.IsTabEnabledProperty, isTabAvailableBinding);

    // Inner tab control
    Style tabControlStyle = Application.Current.FindResource("InnerTabControl.Style") as Style;
    Style itemContainerStyle = Application.Current.FindResource("InnerTab.SelectedTabItem.Style") as Style;
    DataTemplate contentTemplate = Application.Current.FindResource("TabControlTemplate") as DataTemplate;
    DataTemplate itemTemplate = Application.Current.FindResource("InnerTab.ViewPort.Header") as DataTemplate;

    TabControl tabControl = new TabControl();
    tabControl.Style = tabControlStyle;
    tabControl.ItemContainerStyle = itemContainerStyle;
    tabControl.ItemTemplate = itemTemplate;
    tabControl.ContentTemplate = contentTemplate;

    Binding selectedIndexBinding = new Binding();
    selectedIndexBinding.Path = new PropertyPath("InnerTabSelectedIndex");
    selectedIndexBinding.Source = ScopeViewModel;
    BindingOperations.SetBinding(tab, TabControl.SelectedIndexProperty, selectedIndexBinding);

    Binding itemSourceBinding = new Binding();
    itemSourceBinding.Path = new PropertyPath("OscilloscopeViewPortItems");
    itemSourceBinding.Source = ScopeViewModel;
    BindingOperations.SetBinding(tab, TabControl.ItemsSourceProperty, itemSourceBinding);

    tab.Content = tabControl;

    return tab;
}

The resources all seem to be found OK, but I don't see the inner tab. I'm wondering if my bindings are correct. Anyone see anything wrong?

Thanks

If it's not broken, fix it until it is

modified 12-May-16 19:59pm.

indian14312-May-16 8:46

Re: Add a check box and delete multiple rows from DataGrid in WPF

12-May-16 8:46

Hi,

I have a DataGrid in WPF, how can I add a check box and need code to delete multiple selected rows from the DataGrid?

Any help a link or code snippet helps me a lot.

Thanks,

Abdul Aleem

"There is already enough hatred in the world lets spread love, compassion and affection."

Mycroft Holmes12-May-16 13:06

Mycroft Holmes

12-May-16 13:06

Add a bool property to your collection - bind this to the checkbox column in the datagrid.
Add a delete button to the view
when the user clicks the button delete each item from the collection that has been checked.

Never underestimate the power of human stupidity
RAH

Re: Add a check box and delete multiple rows from DataGrid in WPF

indian14312-May-16 14:12

Use Different Paths In Control Template

12-May-16 14:12

Is there anyway I can bind this DataGrid to a method in the ViewModel directly?

Thanks,

Abdul Aleem

"There is already enough hatred in the world lets spread love, compassion and affection."

Kevin Marois11-May-16 13:14

Re: Use Different Paths In Control Template

11-May-16 13:14

I have icons defined as Paths:

<!--SCOPE ICON-->
<Geometry x:Key="data1">M98.219,48.111C97...</Geometry>
<Geometry x:Key="data2">M98.219,46.948C97...</Geometry>
<UserControl x:Key="scopeIcon">
    <Path>
        <Path.Data>
            <GeometryGroup>
                <StaticResource ResourceKey="data1"/>
                <StaticResource ResourceKey="data2"/>
            </GeometryGroup>
        </Path.Data>
    </Path>
</UserControl

What I want to do now is use them in a Button control. I have subclassed Button into ImageButton:

public class MenuButton : Button
{
    public string Caption
    {
        get { return (string)GetValue(CaptionProperty); }
        set { SetValue(CaptionProperty, value); }
    }
    public static readonly DependencyProperty CaptionProperty =
        DependencyProperty.Register("Caption", typeof(string), typeof(MenuButton), new UIPropertyMetadata(null));

}

and the style

<Style TargetType="Button"
        x:Key="TestButtonStyle">

<pre>
<Setter Property="Height" Value="140"/>
<Setter Property="Width" Value="195"/>

<Setter Property="Template">
    <Setter.Value>
        <ControlTemplate TargetType="{x:Type controls:MenuButton}">

            <Border >

                <Grid>

                    <Grid.RowDefinitions>
                        <RowDefinition Height="50*"/>
                        <RowDefinition Height="50*"/>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*"/>
                    </Grid.ColumnDefinitions>

                    PATH(ICON) GOES HERE <=============

                    <TextBlock Grid.Row="1"
                            Grid.Column="0"Text="{TemplateBinding Caption}"
                            HorizontalAlignment="Center"
                            VerticalAlignment="Top"
                            Margin="5"
                            Foreground="White"
                            FontSize="14"
                            TextAlignment="Center"
                            TextWrapping="WrapWithOverflow"/>

                </Grid>

            </Border>

        </ControlTemplate>

    </Setter.Value>
</Setter>

and it's used this way:

<controls:MenuButton Caption="{Binding Caption}"
                        Margin="2"
                        Width="100"
                        Style="{StaticResource TestButtonStyle}"
                        VerticalAlignment="Top"
                        Command="{Binding Path=ButtonClick}"
                        CommandParameter="{x:Static enums:Tabs.Oscilloscope}"/>

The question is, how in the button above to I set the path icon. It will be different for each use case. I want to set it up as part of the ControlTemplate then change it each time I add a new Menu Button.

Thanks

If it's not broken, fix it until it is

Gerry Schmitz11-May-16 16:06

Gerry Schmitz

11-May-16 16:06

Use a ContentPresenter.

Handle Title Bar Icon Click

Kevin Marois11-May-16 5:56

Re: Handle Title Bar Icon Click

11-May-16 5:56

How can I handle the user clicking the icon in a Window's title bar?

Thanks

If it's not broken, fix it until it is

CHill6011-May-16 22:42

CHill60

11-May-16 22:42

AFAIK the Title bar isn't part of the area of an application that exposes events like click. I believe you will have to create some sort of custom title bar.

I found this here on CP - WPF Custom Chrome Library[^]

Re: Handle Title Bar Icon Click

Pete O'Hanlon11-May-16 23:50

11-May-16 23:50

Have a look at Nish's excellent An MVVM friendly approach to adding system menu entries in a WPF application[^]

This space for rent

wpf

Member 113037949-May-16 7:39

Member 11303794

9-May-16 7:39

how used in GAF

Re: wpf

Pete O'Hanlon9-May-16 8:34

WPF Dependency Property Of Type UserControl

9-May-16 8:34

One and a half years for your first question and this is it. Could you expand your question, just a little bit? Maybe you could identify what GAF is (other than a rather crude acronym). Then, maybe you could tell us what you are trying to achieve.

This space for rent

Re: wpf

ZurdoDev11-May-16 9:20

ZurdoDev

11-May-16 9:20

What is GAF?

There are only 10 types of people in the world, those who understand binary and those who don't.

Kevin Marois3-May-16 5:32

Use TTF Font From Resources

3-May-16 5:32

I want to create some controls - a Host and a Content control. There will be one Host and many Content controls. Other developers will create Content controls and use them in the Host. For example I have a Tab control. On each tab will be a host, but each tab's Content control will be different:

MainWindow

<Window x:Class="MainWindowView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:views="clr-namespace:Views"
        Title="Demo" 
        WindowStartupLocation="CenterScreen"
        Height="800" 
        Width="1000">

<pre>
<Grid>

    <TabControl Margin="5">

        <TabItem Header="Tab 1">
            <views:HostView HostContent="ContentControl_1.xaml"/>
        </TabItem>

        <TabItem Header="Tab 2">
            <views:HostView HostContent="ContentControl_2.xaml"/>
        </TabItem>

        <TabItem Header="Tab 3">
            <views:HostView HostContent="ContentControl_3.xaml"/>
        </TabItem>

    </TabControl>

</Grid>

I'm thinking that the Host control will have a ContentPresenter bound to the HostContent DP. The question is how to create the DP HostContent so that it resolves at design time?

Thanks

If it's not broken, fix it until it is

modified 3-May-16 11:38am.

Kevin Marois28-Apr-16 12:13

Re: Use TTF Font From Resources

28-Apr-16 12:13

I'm trying to use a Digital font I downloaded as a resource:

<Window x:Class="KClock.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:KClock"
        WindowStyle="None"
        MouseDown="Window_MouseDown"
        AllowsTransparency="True"
        Background="Black"
        BorderBrush="Transparent"
        Height="300" 
        Width="500">

<pre>
<Grid>

    <TextBlock Text="4:40:25 pm"
               Foreground="Lime"
               FontSize="34">

        <TextBlock.Style>
            <Style>
                <Setter Property="TextBlock.FontSize" Value="36" />
                <Setter Property="TextElement.FontFamily" Value="Resources/DSEG14Modern-Bold" />
            </Style>
        </TextBlock.Style>

    </TextBlock>

</Grid>

The font is in the resource, but it's unchanged in the TextBlock. What's wrong here??

Thanks

If it's not broken, fix it until it is

Richard Deeming29-Apr-16 2:18

Richard Deeming

29-Apr-16 2:18

You need to specify the font family name, separated from the folder name with a #:

TextBlock.FontFamily Property (System.Windows.Controls)[^]:

The folder and font family name are delimited by a # character. The folder reference may be absolute, or relative. For example, "Custom Fonts\#My Custom Font".

Packaging Fonts with Applications[^]:

XML
<TextBlock FontFamily="./resources/#Pericles Light">

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Re: Use TTF Font From Resources

Kevin Marois29-Apr-16 5:21