I develop on VS2010 WPF on Window 7. I have a project that does not throw any error or warning, compile fine, XAML design shows fine except I cannot click or select anyone controls in the XAML design view.
What is the reason, or how can I find out the problem or possible exception?
Had the same problem, I was able to select controls in the VS2012 WPF project previously but something had changed.
Worked out it was a TabItem in a TabControl, I had set the visibility to collapsed
<TabItem Visibility="Collapsed">
to hide the tab header at the top. Setting the TabItem visibility back to visible
<TabItem Visibility="Visible">
allows controls contained in the TabItem to be selected in the XAML design view.
I have reproduced this behavior by putting an empty grid as the last child element of my "main" Grid. In VS2010's designer, I cannot select any of the Buttons. Could this be your issue?
<Window x:Class="WpfApplication1.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">
<Grid>
<Button Content="Button" Height="52" HorizontalAlignment="Left" Margin="93,74,0,0" Name="button1" VerticalAlignment="Top" Width="113" />
<Button Content="Button" Height="38" HorizontalAlignment="Left" Margin="280,100,0,0" Name="button2" VerticalAlignment="Top" Width="96" />
<Grid></Grid> <!-- THIS IS THE PROBLEM!!! -->
</Grid>
</Window>
Had this recently, building the project seemed to fix the problem.
Do you have a Pointer in your toolbox? Sometimes the Pointer item inside the toolbox is gone. So the next item (Border) is selected. So when you try to click, you are actually trying to add a border to the design. You might try resetting the toolbox. But be warned, custom tools are gone then, and have to be added again. (I could not make a comment to this question, so thats the reason I 'answered')
Related
I am trying to create an UWP User Control for the first time. One very basic thing I want is automatic Width and Height at DESIGN-TIME and RUN-TIME based on the content of the user control. Simple enough in theory, but whenever I build the control and drop it on a form, it has this default "Width=100" value. Same thing with the Height.
Here is the simple XAML code i have so far:
<UserControl
x:Class="JTE.JTreeItem"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:JTE"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Width="Auto"
d:DesignHeight="300"
d:DesignWidth="400">
<Grid>
<TextBlock HorizontalAlignment="Left" Margin="10,32,0,0" Text="TextBlock" TextWrapping="Wrap" VerticalAlignment="Top"/>
</Grid>
</UserControl>
But when I drag the control from the toolbox to a page this is what I get:
<local:JTreeItem HorizontalAlignment="Left" Height="100" Margin="247,305,0,0" VerticalAlignment="Top" Width="100"/>
Both the Width and the Height are 100 by default. But why? How can I change this? This seems so simple, yet adding:
Width="Auto"
Does not solve this. Removing it does not solve it. Any value I put there gets ignored, for example, if I do this:
Width="199"
Nothing happens. I get the same 100 default value for the Width and the Height.
Why is this so not intuitive? There seems to be no syntax errors in the XAML, so what is happening there?
I am using Visual Studio Community 2019.
If any of you can help, I would appreciate it. Thanks in advance!!!
EDIT: Added a few things for clarity.
Following picture shows my project.
Here is XAML code for your testing needs.
<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="200" Width="525">
<ScrollViewer Name="ScrollViewer1" Height="67" VerticalAlignment="Top">
<StackPanel>
<TextBox Name="TextBox1" Text="TextBox1"/>
<TextBox Name="TextBox2" Text="TextBox2"/>
<TextBox Name="TextBox3" Text="TextBox3"/>
<TextBox Name="TextBox4" Text="TextBox4"/>
<TextBox Name="TextBox5" Text="TextBox5"/>
<TextBox Name="TextBox6" Text="TextBox6"/>
</StackPanel>
</ScrollViewer>
</Window>
Following picture shows my question;
So, how to click WPF ScrollViewer down button in order to go end of ScrollViwer?
A solution could be to subscribe to the click of that button like here https://stackoverflow.com/a/4932118/6890102, then call the ScrollToEnd() method of the ScrollViewer. But there might be a better solution.
Right-Click on ScrollViewer->Edit Template->Edit a Copy, to see the Scrollviewer's Template. The ScrollViewer contains a ScrollBar. A ScrollBar contains, RepeatButton, and a Track. The RepeatButton is responsible for the up and down movement of the scrollbar. Try checking it. You may find some idea on how to implement your objective.
I am working on a WPF application in which a user control is loaded over main window at run time.
I have a TextBox in the UserControl which is supposed to be a editable TextBox. But I am not able to edit it using keyboard input. Whereas, i am able to set the text pragmatically.
I have refered MSDN forum regarding the issue. Still i am not able to get through. My code is similar to one in the link above.
Please share your thoughts to get this done.
Thanks in advance.
Edit:
xaml code:
<UserControl x:Class="UserControl"
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"
mc:Ignorable="d"
Loaded="UserControl_Loaded"
FocusManager.IsFocusScope="True"
FocusManager.FocusedElement="{Binding ElementName=TestTxt}">
<Grid FocusManager.IsFocusScope="True">
<StackPanel Orientation="Horizontal" FocusManager.IsFocusScope="True">
<TextBox x:Name="TestTxt" IsReadOnly="False" IsEnabled="True" FocusManager.IsFocusScope="True"/>
</StackPanel>
</Grid>
In UserControl_Loaded add TestTxt.Focus();
I got a problem with the Windows.Forms.ElementHost. Within the host I placed a WPF UserControl, in which I got a Popup.
Some Code:
<UserControl
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"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="380">
<Grid>
<Popup x:Name="TestPopup"
IsOpen="{Binding PopupVisible,UpdateSourceTrigger=PropertyChanged}"
Placement="Center"
StaysOpen="False" Width="200" Height="50">
<Grid>
<TextBox/>
</Grid>
</Popup>
<Button Click="Button_Click" />
</Grid>
</UserControl>
So in this example all I got is a ElementHost, a UserControl and a Popup (and a ViewModel in which the IsOpen variable PopUpVisible for the popup is implemented).
Now I got two Buttons... one in my UserControl and one in my WindowsForm with the ElementHost.
Each of the two buttons sets the IsOpen variable PopUpVisible to true. So if I push the button´s the same popup is shown. Until this point everything works fantastic.
Now I got a textbox in my popup... I click in this textbox and begin tipping some random stuff... If I push the button in my wpf usercontrol this works! But if I push the button in my WindowsForm things start to get weird! I got focus and everything on my textbox but the textbox won´t get any of my keyboard tipping. I checked and doublechecked it... I definitely got my "Keyboard Focus" on the textbox!
A bit stuck here... someone has an idea?
Kind Regards.
I've got a grid with several TextBoxes in it. I want to keep this grid fixed at the bottom of my main window. So if the user scrolls down the grid should basically stay in it's place.
One way I thought of doing this was to get some sort of value from the ScrollViewer and add it to the grids Canvas.TopProperty. However I am not sure which value changes when the user scrolls up or down.
Then don't put the scroll on the main window. Put ScrollViewer only on the content (rows) that you want to scroll. Careful not to use an auto for the height of the rows with the ScrollViewer or the container will grow to support all the content and the Scroll does not come into play.
One way:
<Window x:Class="Sample.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">
<Grid>
<ListBox>
<!--Hardcoded listbox items just to force the scrollbar for demonstration purposes -->
<ListBoxItem>Item1</ListBoxItem>
<ListBoxItem>Item2</ListBoxItem>
<ListBoxItem>Item3</ListBoxItem>
<ListBoxItem>Item4</ListBoxItem>
<ListBoxItem>Item5</ListBoxItem>
<ListBoxItem>Item6</ListBoxItem>
<ListBoxItem>Item7</ListBoxItem>
<ListBoxItem>Item8</ListBoxItem>
<ListBoxItem>Item9</ListBoxItem>
<ListBoxItem>Item10</ListBoxItem>
<ListBoxItem>Item11</ListBoxItem>
<ListBoxItem>Item12</ListBoxItem>
<ListBoxItem>Item14</ListBoxItem>
<ListBoxItem>Item15</ListBoxItem>
<ListBoxItem>Item16</ListBoxItem>
<ListBoxItem>Item17</ListBoxItem>
<ListBoxItem>Item18</ListBoxItem>
<ListBoxItem>Item19</ListBoxItem>
<ListBoxItem>Item20</ListBoxItem>
<ListBoxItem>Item21</ListBoxItem>
<ListBoxItem>Item22</ListBoxItem>
</ListBox>
<Grid Panel.ZIndex="5" VerticalAlignment="Bottom" Background="DarkGray">
<StackPanel>
<TextBox HorizontalAlignment="Left" VerticalAlignment="Center">Text box 1</TextBox>
<TextBox HorizontalAlignment="Left" VerticalAlignment="Center">Text box 2</TextBox>
<TextBox HorizontalAlignment="Left" VerticalAlignment="Center">Text box 3</TextBox>
</StackPanel>
</Grid>
</Grid>