I need to put a textblock containing result count information at the bottom of a databound listview. It needs to be within the listview's scrollbars but not be affected by the scrollbars (it must always sit at the bottom of the listview).
Because a listview cannot contain a textblock directly I am achieving this by adding some padding at the bottom of the listview and using a negative margin to make a separate textblock appear as though it is part of the listview. The issue with this is that when the listview's horizontal scrollbar is displayed it covers the textblock. I could add code to figure out if the scrollviewer is displayed and then adjust the margins/paddings accordingly BUT at this stage it sounds like a hacky solution.
Is there a better way to achieve this?
Instead of using a ListView.. you can do something like this:
<ScrollViewer>
<StackPanel>
<ItemsControl ItemsSource="{Binding MyCollection}" />
<TextBlock />
</StackPanel>
</ScrollViewer>
Related
I'm trying to highlight part of text in a textblock from a listbox datatemplate which in turn is bounded to a property of a custom class by using a textbox to search the list for input text. But the problem is that only part of the items are highlighting (most of the ones visible) but when i maximize the window and try to input another character then suddenly all of them gets highlighted my guess where the problem might be is in this piece of code:
ListBoxItem listboxItemFound= (ListBoxItem)this.listBox1.ItemContainerGenerator.ContainerFromItem(TItem);
Since this method is returning a null when the items are not visible but the items are currently in the listbox. Somehow I guess the items listboxItem instances are not yet created until you scroll down or maximize to view more items.
XAML DataTemplate:
<DataTemplate>
<Grid Name="gridOfListbox" Height="25" Margin="0,2">
<DockPanel Name="dockpanelWithTxtBlock">
<TextBlock Name="textbloxk" DockPanel.Dock="Left" FontSize="15" TextAlignment="Center">
<Run Text="" /><Run Background="Yellow" Text="" /><Run Text="{Binding ProductID}" />
</TextBlock>
</DockPanel>
</Grid>
</DataTemplate>
If more code is needed just let me know.
Any help would be greatly appreciated!!
Also if there is any other better way of finding the listboxItem bounded to the custom Item just let me know. Thank you very much!
[Pic of problem] http://i.stack.imgur.com/HViag.png
One way to fix this is to set VirtualizingStackPanel.IsVirtualizing to false for your ListBox. This will cause all of the items to be created right away. The downside to this is if your ListBox has many items, your program will use more memory (since more items will be created), and could potentially run slower depending on the number of items.
A better solution to consider would be to have multiple DataTemplates for this - one without the highlight, and one with. You can set a DataTemplateSelector for your ListBox (using the ItemTemplateSelector property). The selector can choose which template to use based on if the item matches the search term or not.
The tricky part would be writing the template with the highlighted text. You could probably achieve that by having properties on the object the ListBoxItem is bound to for the text before the highlighted text, the highlighted text, and then the remaining text.
Till now I have a combo-box control which displays all the available region language in the UI as a combo-box items.
its in WPF and MVVM
<ComboBox
x:Name="cbLanguage"
Grid.Row="1"
Height="30"
Width="200"
HorizontalAlignment="Center"
VerticalAlignment="Top"
ItemsSource="{Binding LocalLanguages,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
SelectedIndex="0">
But I saw this window and thought this looks much more legant and modern.
Can I do similar kind of window in WPF.
I tried to change the Combobox with list-box, List-view but no result.
Any help if there is any control in WPF which can do this.
This solves many problem specially if the combo box have more than 10 items user has to scroll through the all and then select the last index. But in this way user can select any locals as all are displayed in the UI. Even user can have the option to display alphabetically.
arraging items in 3 columns can be achieved by using UniformGrid as ItemsPanel
<ComboBox.ItemsPanel>
<ItemsPanelTemplate >
<UniformGrid Columns="3"/>
</ItemsPanelTemplate>
</ComboBox.ItemsPanel>
modify ItemTemplate to change items apperance and have green color for selected item
i think it is necessary to modify ComboBox template to have custom header and footer in a dropDown (Edit Template-Edit a Copy in Visual Studio designer)
In WPF combobox is basically a Popup when the toggle button is pressed.
You could implement your own popup or you could have a look at the template of the ComboBox. Here is a link to ComboBox template
I have a ListView and I bind to an ObservableCollection<Folder> and when I hover over a ListViewItem, there is a second selection thing appearing underneath (or ontop of) the item text which prevents me from being able to "activate" the selected item because it doesn't appear to be receiving my click.
As you can probably see, the structure is:
ListView > ItemTemplate > DataTemplate > ListViewItem. But I'm guessing I have that double-selection thing because there are basically 2 "item templates" (DataTemplate and ItemTemplate). But if I get rid of DataTemplate, it throws a runtime error. If I get rid of ItemTemplate, it throws an error. I can't win. How do I get rid of this thing?
Update:
This gives me the desired effect:
<StackPanel x:Name="folderContainer" HorizontalAlignment="Left" VerticalAlignment="Stretch" Width="175" Background="Khaki" Margin="0, 18, 0, 0">
<ListView x:Name="folderList" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" ItemsSource="{Binding Folder}" BorderBrush="{x:Null}" BorderThickness="0">
<ListView.ItemTemplate>
<DataTemplate>
<TextBlock x:Name="folderItem" Text="{Binding Name}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackPanel>
With the ListViewItem you where including a specialized wrapper primarily used the ListView to contain unknown item(s) presented by the binding of the ItemsSource when there is default template used. It helps to show that unknown item on the screen, its the purpose of the ListViewItem. For example if someone bound a list of strings, the strings have no xaml style on hover, hence there needs to be a container control to achieve all things graphical in those situations.
Why the two Shadows?
The actual ListViewItem is at its heart (or actually its property), a content control containing what I surmise you had was a textbox control. That is now two controls thanks to the DataTemplate you provided.
Hence you had a wrapper, with a content containing a texbox control. So there are two things which take up space, one is the ListViewItem and the other is the textbox. By hovering over each item, each's style kicked off to show the padding of the control as a selectable region in the Zorder fashion whereas both are seen.
Nothing more nothing less.
Since you knew what is to go into the content control, there was no need to use the ListViewItem wrapper, it was redundant, and you used the actual textbox; hence with only it's style to show the padding of the single control on hover.
I want a TextBox with line numbers. So I decided to use one small TextBox for the line numbers on the left and another big one on the right for the text.
My problem now is that I put these two TextBoxes into a Dockpanel and I need a height difference because the TextBox for the line numbers should not have scrollbars. So I need to shorten the left TextBox. My plan is to put an empty StackPanel below the left TextBox. And I'm getting trouble because the DockPanel doesn't sort my controls like I want. The only way I got it was using a fix width but I don't want that!
Or should I go a complete different way?
I don't know why you have to build this control, but you can find something similar for WPF. See this link AvalonEdit. It's a text editor control.
If you don't want a scroll bar on a control, just set the VerticalScrollBarVisibility to disabled.
But I'm not sure that's exactly what you need. If you do this then obviously your line numbers aren't going to scroll with your text box. You best bet might be to put your two textboxes (although if the line numbers aren't supposed to be editable, you might want to use labels instead) in a dockpanel and wrap the dock panel in a scrollviewer.
You may try to use ScrollView. The code below demonstrates the idea. But I haven't come up with a solution to enable horizontal scrolling.
<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>
<ScrollViewer Height="100">
<DockPanel>
<TextBlock DockPanel.Dock="Left">
<TextBlock.Inlines>
1<LineBreak/>
2<LineBreak/>
3<LineBreak/>
4<LineBreak/>
5<LineBreak/>
6<LineBreak/>
7<LineBreak/>
8<LineBreak/>
9<LineBreak/>
10<LineBreak/>
11<LineBreak/>
12<LineBreak/>
13<LineBreak/>
</TextBlock.Inlines>
</TextBlock>
<TextBox AcceptsReturn="True" TextWrapping="Wrap">
I want a TextBox with line numbers. So I decided to use one small TextBox for the line numbers on the left and another big one on the rigth for the text. My problem now is that I put these two TextBoxes into a Dockpanel and I need a Heigth difference because the TextBox for the line numbers should not have scrollbars. So I need to short the left TextBox. My plan is to put an empty StackPanel below the left TextBox. And I'm getting trouble because the DockPanel doesen't sort my controls like i want. The only way I got it was using a fix width but I don't want that!
</TextBox>
</DockPanel>
</ScrollViewer>
</Grid>
</Window>
It looks like
I'm not sure about the best way to implement this in WPF, so I'll state my problem first.
I have a collection of frames. Each frame has two images. Let's say I have 10 frames giving a total of 20 images. I want to show the images at the bottom of the screen organized like a film strip - 2 rows and 10 columns. When the user clicks on one of this images or uses the arrow, it should become selected and the selected image information will be used somewhere else in the application.
I've implemented it as a ListBox with ItemsSource bound to my viewmodel's Frames collection (an observablecollection). In the DataTemplate of the ListBox, I've created a grid with two rows, each one containing a Image control. The one on row 0 is bound to TopImage (a property of my Frame class) and the bottom one is bound to BottomImage.
All this work, but the problem is that when I use the arrows, the whole frame (item) gets selected. How do I select each image in the datatemplate individually?
OR
Is there a better way to implement this>
You have two problems:
You want to separate the selectability of the upper and lower images in a frame
You want the arrow keys to be able to navigate images in two dimensions
If you did not have the arrow key requirement, then you could solve the first problem by nesting ListBox objects inside a parent ItemsControl. But then the arrows only do the right thing within a ListBox. To address that requires a different approach.
Here is a 2x2 grid data-bound to a four-element collection of images. Here we use the little-used UniformGrid to cause the collection to wrap after so many columns. Since we're using an ItemsControl, we lose automatic selection support but we get it back by making the Image control the content of a Button.
<Grid>
<Grid.Resources>
<x:Array x:Type="sys:String" x:Key="sampleData">
<sys:String>http://thecybershadow.net/misc/stackoverflow.png</sys:String>
<sys:String>http://thecybershadow.net/misc/sourceforge.png</sys:String>
<sys:String>http://thecybershadow.net/misc/stackoverflow.png</sys:String>
<sys:String>http://thecybershadow.net/misc/sourceforge.png</sys:String>
</x:Array>
</Grid.Resources>
<ItemsControl ItemsSource="{StaticResource sampleData}" Focusable="False">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Columns="2"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button>
<Button.Content>
<Image Source="{Binding}"/>
</Button.Content>
</Button>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Grid>
The net effect is a 2x2 grid of images that you can freely arrow around between. You can use styling to make the button aspect less button-like without losing focusability. So bind all twenty images to this view, first the top ten and then the bottom ten. You can also bind the column count from the same data source.