WPF Discussion Boards

7-Jan-20 8:53

Kevin Marois wrote:
The problem is that the CanExecute doesn't fire until I actually click on a menu bar.

As far as I can see, that would be the expected behaviour. The system doesn't need to know whether the menu item is enabled or not until the menu is shown, so I wouldn't expect it to call CanExecute for the menu's command until you click on the button to show the menu.

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

WPF

MrsealIsHotChicken18-Dec-19 14:41

MrsealIsHotChicken

18-Dec-19 14:41

In wpf mvvm, a checkbox is set in a custom popup. If there is another datagrid below the popup control, clicking the checkbox will pass the mouse click event to the lower layer. How to control the mouse click event in the custom popup at the upper layer, so that the click event is not passed to the bottom layer, thank you

Gerry Schmitz19-Dec-19 7:11

DataGrid Column Right Aligned

19-Dec-19 7:11

The scenario you describe (custom popup) has nothing to do with event tunneling or bubbling. Whatever is getting "passed", it's not an "event".

What is a "layer"? One can't confuse the logical and the physical when trying to solve a problem.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Kevin Marois16-Nov-19 13:45

Kevin Marois

16-Nov-19 13:45

Here's my code:

<DataGridTextColumn Header="PO Cost" 
                    Binding="{Binding Total, StringFormat=C, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                    Width="100"
                    IsReadOnly="True">

<pre>
<DataGridTextColumn.HeaderStyle>
    <Style TargetType="DataGridColumnHeader">
        <Setter Property="HorizontalContentAlignment" Value="Right" />
    </Style>
</DataGridTextColumn.HeaderStyle>

<DataGridTextColumn.ElementStyle>
    <Style TargetType="{x:Type TextBlock}">
        <Setter Property="HorizontalAlignment" Value="Right" />
    </Style>
</DataGridTextColumn.ElementStyle>

The problem is that the header style changes the way the header looks. Here is a screen shot: https://1drv.ms/u/s!AjBmoYAYz_v2ghvO9qNjDcOFvZGh?e=feNnPO

Any ideas what's wrong?

If it's not broken, fix it until it is.
Everything makes sense in someone's mind.
Ya can't fix stupid.

Re: DataGrid Column Right Aligned

Mycroft Holmes16-Nov-19 20:07

Mycroft Holmes

16-Nov-19 20:07

Just spent 10 minutes trying to get the syntax for HeaderTextAlignment before I realised I used Telerik grids for that.

In the past I have created the header style for ALL columns and then based the right align on that custom header. Ghu knows what they have done to the built in style.

Never underestimate the power of human stupidity -
RAH
I'm old. I know stuff - JSOP

Re: DataGrid Column Right Aligned

Richard Deeming17-Nov-19 23:03

WPF C# Make window's the same width as the screen

17-Nov-19 23:03

Looks like you've got a custom header style defined somewhere, which is not being picked up as the base style for your right-aligned style.

If you can find the custom header style, you might be able to use BasedOn to fix the right-aligned style:
Style.BasedOn Property (System.Windows) | Microsoft Docs[^]

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

Acuena3-Nov-19 7:44

Acuena

3-Nov-19 7:44

Hi!

I am trying to make a window that when it starts, takes up the entire width of the screen, regardless of resolution.

I have tried to set the Width to 100% and to bind it to the primary screen width

Width="{Binding SystemParameters.PrimaryScreenWidth}">

But neither worked Frown | :(

Anyone have any idea on how to do it?

Have a nice day

Re: WPF C# Make window's the same width as the screen

Richard MacCutchan3-Nov-19 21:45

Richard MacCutchan

3-Nov-19 21:45

Try this: Window.WindowState Property (System.Windows) | Microsoft Docs[^].

Re: WPF C# Make window's the same width as the screen

Richard Deeming3-Nov-19 22:28

c# - WPF Binding from System.Windows.SystemParameters.PrimaryScreenWidth with a Converter - Stack Overflow[^]

3-Nov-19 22:28

Try:

XAML

Width="{Binding Source={x:Static SystemParameters.PrimaryScreenWidth}}"

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

Re: WPF C# Make window's the same width as the screen

Acuena4-Nov-19 12:31

Acuena

4-Nov-19 12:31

Hi!

SO close Smile | :)

It gives a very small gap between the screen edge and the window.
I took a screenshot of the screen so that I could zoom in and check how many pixels there was between the window and the screen.

It's around 8 pixels gap on the right side.
And even if I set Left and Top to 0, I get one pixel from the top and 8 from the Left.

Here is the XML code for the window that I have now:

<Window x:Class="Sales.Menu"
        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:local="clr-namespace:Sales"
        mc:Ignorable="d"
        Top="0"
        Left="0"
        Title="Menu" Height="450" Width="{Binding Source={x:Static SystemParameters.PrimaryScreenWidth}}"
        >
    <!--The rectangle below is just a test-->
    <Grid>
        <Rectangle Width="10"></Rectangle>
    </Grid>
</Window>

I would want it go to to the edge and there to be no gaps.

Thanks for the help so far Smile | :)

Have a nice day!
Thinking of getting a new IDE!

Re: WPF C# Make window's the same width as the screen

Mycroft Holmes4-Nov-19 18:42

Mycroft Holmes

4-Nov-19 18:42

Is it possible you are looking for Kiosk mode?

c# - WPF application in Kiosk mode - Stack Overflow[^]

Never underestimate the power of human stupidity -
RAH
I'm old. I know stuff - JSOP

Re: WPF C# Make window's the same width as the screen

Gerry Schmitz5-Nov-19 5:25

Re: WPF C# Make window's the same width as the screen

5-Nov-19 5:25

Create a (dummy) maximized window in the background and copy it's properties (e.g. width) to your actual "centered" window.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Acuena8-Nov-19 5:21

Acuena

8-Nov-19 5:21

I was about to try Gerry's suggestion when I decided to test retriving the screen width with code and set the window size to it.
It worked, but I wonder, is there not a way to do this without using code in WPF?
Here is the code I used if someone is interested:

this.Width = System.Windows.SystemParameters.PrimaryScreenWidth+2;

Note that +2 is there since the Windows Left parameter in the XML are set to -2, had to compensate for that or I get a small gap to the right.

I put it right below the "InitializeComponent();" call.

Have a nice day!
Thinking of getting a new IDE!

Re: WPF C# Make window's the same width as the screen

Richard Deeming8-Nov-19 6:14

DataGrid with DataGridTemplateColumns - Cannot create new rows

8-Nov-19 6:14

If you want to perform mathematical functions on the bound value, you'll need a converter - for example:
GitHub - hexinnovation/MathConverter: A WPF Converter class that does it all[^]

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

Mc_Topaz7-Oct-19 23:42

Mc_Topaz

7-Oct-19 23:42

I have a DataGrid with a couple of DataGridTemplateColumns.
When I try to hit the Enter-key on my keyboard there is no new row created in the DataGrid.

I have other DataGrids with columns which are not DataGridTemplateColumns and I can then create new rows by hitting the Enter-key. So I assume the DataGridTemplateColumns in some way causing the problem.

I have made a reproducible code and I have made it public in this GIT-Gist.
* I use Fody PropertyChanged to handle all the INotificationPropertyChanged in my view models.
* The code should just be copy-and-paste.

The bindings between the View and the ViewModels also don't seem to work :S
But if you uncomment the row in the ViewModel's construcotor (please see line 60 in the MainWindow.xaml.cs), a new row in the DataGrid will be created. With this row, the bindings works as expected. I cannot understand why.

Here is the XAML-code. It maybe enough for you with only the XAML-code to solve this problem.

XML

<Window x:Class="WpfApp1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp1"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">

    <Window.DataContext>
        <local:ViewModel />
    </Window.DataContext>
        
    <DataGrid ItemsSource="{Binding Rows}" AutoGenerateColumns="False" CanUserAddRows="True" Margin="0,50,0,0">

        <DataGrid.Columns>
                
            <!-- Browse -->
            <DataGridTemplateColumn Header="Browse">
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <Button Command="{Binding Browse}" Content="..." Width="40" Margin="6,0,6,0" />
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
            
            <!-- Path -->
            <DataGridTemplateColumn Width="300" Header="Path" IsReadOnly="True">
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <TextBox Text="{Binding Path, Mode=OneWay}" />
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
                
            <!-- Slider -->
            <DataGridTemplateColumn Width="100" Header="Slider">
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <Slider Value="{Binding Value, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Minimum="1" Maximum="50" Margin="6,0,6,0" />
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>

            <!-- Slider's value -->
            <DataGridTextColumn Binding="{Binding Value}" Header="Value" IsReadOnly="True" />

        </DataGrid.Columns>
    </DataGrid>

</Window>

modified 8-Oct-19 7:33am.

Re: DataGrid with DataGridTemplateColumns - Cannot create new rows

Gerry Schmitz8-Oct-19 3:11

Re: DataGrid with DataGridTemplateColumns - Cannot create new rows

8-Oct-19 3:11

Can't think of too many examples that use buttons and sliders in a data grid; data sources called "path" and "value"; and columns that are read-only. Worlds in collision.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Mc_Topaz8-Oct-19 3:25

Mc_Topaz

8-Oct-19 3:25

The code I gave, is only an example how to reproduce the problem.
A real-life example of a button, textboxes and a slide is irrelevant.

My actual code contains of a button, a textbox, two numeric up down controls and a date picker in each row. All columns, except the textbox, are DataGridTemplateColumns.

Is there a solution to my problem?

WPF

RajaMohammed.A3-Oct-19 22:29

RajaMohammed.A

3-Oct-19 22:29

How to assign a object from the List in c# linq

Richard Deeming4-Oct-19 1:59

4-Oct-19 1:59

I see you still haven't learned how to ask a question. D'Oh! | :doh:

How to get an answer to your question - Silverlight / WPF Discussion Boards[^]
Asking questions is a skill[^]

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

Richard MacCutchan4-Oct-19 3:22

Richard MacCutchan

4-Oct-19 3:22

Rather than posting all these totally vague questions, your time would be better spent actually studying the programming language(s) that you are interested in using. You will not learn it from here.

Gerry Schmitz4-Oct-19 6:32