I might sound dumb here, but I want to do something really simple. At design time, I want to add columns to a listview control and add some data to it. I need to add combobox in each column of the listview. The thing I am not able to find is where to mention the column number in the listviewitem. Any help appreciated guys.
<ListView IsSynchronizedWithCurrentItem="True" Margin="8,68,304,188"
BorderThickness="2,2,2,2">
<ListView.View>
<GridView>
<GridViewColumn Width="150" Header="Column1"/>
<GridViewColumn Width="150" Header="Column2"/>
</GridView>
</ListView.View>
<ListViewItem>
</ListViewItem>
</ListView>
Each column in the listviewitem is rendered based on the GridView definition, so there is no real concept of column numbers. What you do is bind objects to the the listview's itemsource and it creates listviewitems from it. Thus, there are a few hoops to jump through.
This link has an example of how to do some simple object data binding. The advantage of this is what binding structure you have for design time can probably be reused for run-time if you set the datacontext/itemsource to an empty object instead of the static one in XAML.
If you're doing this to show examples or you just have a static data source that you want to use, I would recommend using the XmlDataProvider. Then you'd change your ListView to be like this,
<ListView IsSynchronizedWithCurrentItem="True" Margin="8,68,304,188"
BorderThickness="2,2,2,2">
<ListView.View>
<GridView>
<GridViewColumn Width="150" Header="Column1" DisplayMemberPath="{Binding XPath=/A/B}"/>
<GridViewColumn Width="150" Header="Column2" DisplayMemberPath="{Binding XPath=/A/C"/>
</GridView>
</ListView.View>
<ListViewItem>
</ListViewItem>
</ListView>
Related
I have a ListView where for each item I'd like to add a TextBox for user input, and then be able bind to its content per selected item (or using an indexer) from outside of the ListView.
To illustrate:
<ListView Name="lv" ItemsSource="{Binding Source={StaticResource lvSrc1}}">
<ListView.View>
<GridView>
<GridView.Columns>
<GridViewColumn Header="Loc">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBox Name="tbGv" Text="User input" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView.Columns>
</GridView>
</ListView.View>
</ListView>
<TextBlock Text="{Binding ElementName=lv, Path=SelectedItem[tbGv]}" />
Of course the above binding won't work, as SelectedItem returns an object from the underlying collection, which has nothing to do with the added TextBox.
How can I access the generated TextBoxes using pure XAML?
Edit:
I've now found a couple of posts with somewhat similar problems, where solutions presented are trickier than I expected and not based on XAML.
So rather, would it be possible to access ListViewItem (not the data its bound to) and its properties? This way I think I could pass text from my TextBox through the Tag property of ListViewItem.
I'm quite new to WPF so I assume that my problem and its phrasing is ridiculous, but please be gentle ;)
which wpf control Should i use in case I need only two columns. the first colum contains Property name and second column contains its value. however, on the top of all those properties I need a header of each columns like PROPERTY and VALUE. I know datagrid would not be a good solution for this. can someone suggest me which control to use or should I stick to Grid and set those header manually.
If you really can't use a DataGrid, then the GridView is probably your best bet... and when I say best, I mean easiest really. Assuming that you have a collection of your data type named Items and that the data type inside the collection has two properties, Property and Value, you could use this:
<ListView ItemsSource="{Binding Items}" HorizontalAlignment="Center"
VerticalAlignment="Center">
<ListView.View>
<GridView>
<GridViewColumn Header="Property" DisplayMemberBinding="{Binding Property}" />
<GridViewColumn Header="Value" DisplayMemberBinding="{Binding Value}"/>
</GridView>
</ListView.View>
</ListView>
I would like to bind GrivdViewColumn's Width Property with my ViewModel. Lets say an instance of ViewModel is the Datacontext of the Window. ViewModel has got Properties called IdWidth, LastNameWidth, FirstNameWidth. And that Window contains the following given ListVeiw in a stackPanel. Everything is fine but somehow the Width Property of GridViewColumn is not bound. Please post the code after making sure that it works.
<ListView Name="PatientListView"
ItemsSource="{Binding Patients}"
SelectionMode="Single">
<ListView.View>
<GridView>
<GridView.Columns>
<GridViewColumn Header="Patient-Id"
Width="{Binding IdWidth, Mode=TwoWay}"
DisplayMemberBinding="{Binding PatientId}"/>
<GridViewColumn Header="Last Name"
Width="{Binding LastNameWidth, Mode=TwoWay}"
DisplayMemberBinding="{Binding LastName}"/>
<GridViewColumn Header="Last Name"
Width="{Binding FirstNameWidth, Mode=TwoWay}"
DisplayMemberBinding="{Binding FirstName}" />
</GridView.Columns>
</GridView>
</ListView.View>
</ListView>
The accepted answer is wrong as outlined in my comment, looking at your paths you seem to expect the DataContext to be the item, which cannot work (there are multiple items to begin with, which should be chosen?).
The DataContext of the columns is the DataContext of the ListView.
This example will result in a column with the Header Lorem Ipsum:
<ListView>
<ListView.DataContext>
<Label Content="Lorem Ipsum"/>
</ListView.DataContext>
<ListView.View>
<GridView>
<GridViewColumn Header="{Binding Content}"/>
</GridView>
</ListView.View>
</ListView>
Also you might be interested in this article on debugging databindings.
Edit: FrameworkElement is not required for DataBinding, sorry for this incorrect interpretation of the citation from MSDN below.
See comments and #H.B. 's answer
GridViewColumn does not inherit from FrameworkElement, which is required for databinding.
see MSDN:
Support for data binding and dynamic resource references: [...], but the ability to resolve a member value that is stored as an Expression (the programming construct that underlies both data binding and dynamic resources) is implemented by FrameworkElement
This is my XAML:
<ListView ItemsSource="{Binding Items}">
<ListView.View>
<GridView>
<GridViewColumn Header="Property1" DisplayMemberBinding="{Binding Property1}" />
<GridViewColumn Header="Property2" DisplayMemberBinding="{Binding Property2}" />
</GridView>
</ListView.View>
</ListView>
I want these 2 columns to take up the width of ListView in 1:1 ratio.
How can I achieve this?
Edit: I found this suggestion on MS Connect. This would perfectly solve my problem.
However it is closed as postponed (for 2.5 years now..)
What comes to mind is using internal Grids in the templates which each have a ColumnDefinition with the same SharedSizeGroup, the GridView should then have Grid.IsSharedSizeScope="True" and the columns of the grid view should themselves be unresizable (if that is possible), cannot test that right now so it's a bit sketchy.
Another method would be to bind both Widths of the GridViewColumns to the width of the ListView and then use a custom converter to get an appropriate fraction of that back.
I have a collection of objects which I would like to represent columns in a GridView.
Currently I am binding individual columns in my GridView to items in the collection like this:
<ListView>
<ListView.View>
<GridView>
<GridViewColumn Header="{Binding Path=MyColumns[0].Title}"></GridViewColumn>
<GridViewColumn Header="{Binding Path=MyColumns[1].Title}"></GridViewColumn>
<GridViewColumn Header="{Binding Path=MyColumns[2].Title}"></GridViewColumn>
</GridView>
</ListView.View>
</ListView>
This works well, but what I really want to do is to bind to the collection itself (since the number of items in the collection might change at run-time). I would like to accomplish this in XAML. What I have in mind is something like this (note this does not work - the ColumnsSource attribute is make-believe):
<ListView>
<ListView.View>
<GridView ColumnsSource="{Binding Path=MyColumns}">
</GridView>
</ListView.View>
</ListView>
Can this be done? If so, how?
You can use an attached property to create a ColumnsSource property, see this question for an example.