I have a textblock which is inside a listbox and I am trying to write an if statement which is dependant on the contents of this textblock. I am trying to get the data from the TextBlack which I have named "category1" however when I try to write my if statement I am getting a message which just says
"the name category1 does not exist in the current context"
I tired moving that TextBLock out of the ListBox and it works fine but wont work while its inside there. Does anyone know how to reference this textblock.
Here is the my XAML code
<ListBox x:Name="HINList" Margin="0,300,-12,0" ItemsSource="{Binding Details}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17" Width="432">
<TextBlock Text="{Binding HINNumber}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
<TextBlock Text="{Binding CategoryLetter}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock x:Name="category1" Text="{Binding Category1}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock Text="{Binding Category2}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock Text="{Binding Category3}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextNormalStyle}"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Assuming you're writing your if statement in the code behind file, wouldn't something like:
if(((WhateverTypeIsInDetailsCollection)HINList.SelectedItem).Category1 == something) {
// then do whatever you want
}
As Russell pointed out there is a category1 item for every entry in the list. I assume you wanted to do something with the selected item.
This is due to xaml namescopes. The names inside a DataTemplate are in a different namescope than outside, that's why you can't access them (what #Russell pointed is part of why it's done this way).
I think that you want to access that field for the "Category1" property on the selected item of the HINList ListBox that is bound to the Details collection. What you can do is set the binding on the Category1 to be two way, and bind the SelectedItem of the ListBox to a Detail item like so:
xaml:
<ListBox x:Name="HINList" ItemsSource="{Binding Details}"
SelectedItem={Binding SelectedDetailItem, Mode=TwoWay}>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17" Width="432">
<TextBlock Text="{Binding Category1, Mode=TwoWay}" TextWrapping="Wrap" .../>
<!-- the other fields -->
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
code-behind
if(SelectedDetailsItem.Category1==...)
{
....
}
Hope this helps :)
Related
I am parsing a RSS Feed from one site and storing it in listbox1 and then parsing another RSS storing it in listbox2. Now I want to combine the data of listbox1 and listbox2 in listbox3. It might sound silly but I am unable to do it. The main problem is I am not able to access the controls inside the listbox.
<ListBox x:Name="list1" ItemsSource="{Binding RSSData}" DataContext="{Binding RSSData}" Visibility="Collapsed">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock HorizontalAlignment="Center" x:Name="txtpubDate" Foreground="#FF170505" Text="{Binding Path=pubDate}" TextDecorations="Underline" ></TextBlock>
<TextBlock Padding="18" Foreground="#FF0E0101" x:Name="txtTitle" TextWrapping="Wrap" Text="{Binding Path=Title}" FontWeight="Bold"></TextBlock>
<Image Height="200" x:Name="imageLink" Source="{Binding strImg}"></Image>
<TextBlock Foreground="#FF0F0202" Padding="35" TextTrimming="WordEllipsis" HorizontalAlignment="Left" x:Name="txtDesc" Margin="2" TextWrapping="Wrap" Text="{Binding Path=Description,Converter={StaticResource RssTextTrimmer}}"></TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
This is the XAML code of my listbox1 and I am trying to do it with listbox3.itemsource=listbox1.itemsource; but nothing is happening.
I also tried to add data in this way: listbox3.items.add(listbox.items[i])
but nothing is working.
Please help.
You can loop through the contents of the listbox and add them one by one for instance:
foreach(object item in listbox1.items)
{
listbox3.items.add(item);
}
and then do the same for listbox2.
I have a listpicker control that has a list of meals. This control is populated using following code where viewModelMeal returns a collection of type Meal
After that I get the Diet data from database and that also has a column name MealId. Now when I try to set the selected item of listpicker control with that mealid it gives me error that "SelectedItem must always be set to a valid value". Here is the function setting the selected item of listpicker
and XAML code
<toolkit:ListPicker Name="lpMeal" Height="60" ItemsSource="{Binding}" VerticalAlignment="Bottom" Background="Black" FullModeHeader="Select your Meal" Foreground="White" ExpansionMode="FullScreenOnly" Margin="5,0">
<toolkit:ListPicker.ItemTemplate>
<DataTemplate>
<StackPanel Name="listpickerStackpannel" >
<!--<TextBlock Text="{Binding mealId}" Visibility="Collapsed"></TextBlock>-->
<TextBlock Text="{Binding mealName}" TextAlignment="Center" FontFamily="Times New Roman" FontSize="30"></TextBlock>
</StackPanel>
</DataTemplate>
</toolkit:ListPicker.ItemTemplate>
<toolkit:ListPicker.FullModeItemTemplate>
<DataTemplate>
<StackPanel Name="listpickerStackpannel" Margin="10">
<!--<TextBlock Text="{Binding mealId}" Visibility="Collapsed"></TextBlock>-->
<TextBlock Text="{Binding mealName}" TextAlignment="Center" FontFamily="Times New Roman" FontSize="30"></TextBlock>
</StackPanel>
</DataTemplate>
</toolkit:ListPicker.FullModeItemTemplate>
</toolkit:ListPicker>
To elaborate on Chubosaurus Software's comment.
You need to set the SelectedItem to a value that is in the list that the lpMeal ItemsSource is bound to. In your case:
lpMeal.SelectedItem = DietViewModel.GetDefault().GetItem(ID);
Therefore you are setting the SelectedItem to a member of the list in it's ItemsSource.
I have some problems binding a ListBox to the elements of a collection in a collection.. Let me explain:
I have a collection, ObservableCollection<Test> named testsCollection. Every test contains an ObservableCollection<LogEvent> named LogEvents. Every LogEvent has a Message that I need to display in the ListBox.
I need to display every "Message" in every "LogEvent" in every "Test". It has to be displayed in a flat list so I'm using a ListBox.
Here's a summary of what I tried:
DataContext = testCollection; // testCollection is an ObservableCollection<Test>
The I put this in the XAML:
<ListBox ItemsSource="{Binding LogEvents}" ItemTemplate="{StaticResource stepItemTemplate}">
Finally, here's the ItemTemplate, stepItemTemplate:
<DataTemplate x:Key="stepItemTemplate">
<TextBlock Text="{Binding Message}"></TextBlock>
</DataTemplate>
This "works" but it only displays the Messages in the LogEvents of the first Test. But I need to display every Messages of every LogEvent of every Test.. And I don't know what to try anymore :(
You should Usser ItemsControl when you want to bind a scenario like this
<ListBox ItemsSource="{Binding testsCollection}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Message}" FontSize="20" />
<ItemsControl ItemsSource="{Binding LogEvents}" Margin="0 20 0 0">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Blue" BorderThickness="2">
<TextBlock Text="{Binding Message}" FontSize="20" />
</Border>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
I am currently parsing an HTML to produce an array shown below in a listbox
I am outputing each object in the array to a textbox like so
//first line
flight1.Text = node[0][2];
origin1.Text = node[0][3];
status1.Text = node[0][7];
time1.Text = node[0][6];
//second line
textBlock1.Text = node[1][3];
textBlock2.Text = node[1][3];
textBlock4.Text = node[1][7];
textBlock3.Text = node[1][6];
This is the outcome
AS you can image this is fairly grueling work and probably not the best way to do it.
Is there anyway to Bind each section on the array eg.. all flight names to a listbox in a data template so it would automatically list all the flight times and all the flight times etc..
Something like this for the XAML
<ListBox Margin="6,6,-12,0" Name="listBox1">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17" Width="432" Height="Auto">
<TextBlock Text="{Binding FlightNumber}" Foreground="#FF4BCCF5" FontSize="24" />
<TextBlock Text="{Binding Origin}" TextWrapping="Wrap" FontSize="22" Foreground="#FF969696" />
<TextBlock Text="{Binding Time}" TextWrapping="Wrap" FontSize="20" Foreground="#FF05C16C" />
<TextBlock Text="{Binding Status}" TextWrapping="Wrap" FontSize="20" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
I'm not sure what you would like to achieve. But in general I would suggest to do the following steps:
Parse the HTML
Put each line in FlightInformation-Class (with properties like you have in your XAML-example)
Put all the FlightInformation-Objects in an ObservableCollection
Apply a DataTemplate to your ItemsControl
In my application using DataTemplate mechanism I insert into ListBox item another listbox. But is it possible that when selected one listboxitem in parent listbox, the focus may be on another parent listboxitem's child (see picture)
How to do: if one of child listbox in focus (one item from them selected), then parent listboxitem being selected to? Using binding or templating
<DataTemplate x:Key="NotesListBoxDataTemplate" DataType="Note">
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Horizontal">
<TextBox Text="{Binding Path=Title, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></TextBox>
<my:DatePicker Height="25" Name="datePicker1" Width="115" xmlns:my="clr-namespace:Microsoft.Windows.Controls;assembly=WPFToolkit"
SelectedDate="{Binding LastEdit,
Mode = TwoWay}" />
</StackPanel>
<TextBox Text="{Binding Path=Content, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></TextBox>
<StackPanel Orientation="Horizontal">
<ListBox Name="ImagesListBox" SelectedIndex="{Binding Mode=OneWayToSource, Source={StaticResource progParameters}, Path=SelectedImage, UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding Path=Images}" ItemTemplate="{StaticResource NotesListBoxImagesTemplate}" Style="{StaticResource HorizontalListBox}">
</ListBox>
<StackPanel Orientation="Vertical">
<Button Name="AddImageButon" Content="+" Click="AddImageButon_Click"></Button>
<Button Name="RemoveImageButon" Content="-" Click="RemoveImageButon_Click"></Button>
</StackPanel>
</StackPanel>
</StackPanel>
</DataTemplate>
On the parent ListBox set property IsSynchronizedWithCurrentItem to true, then in the inner ListBoxes set the SelectedItem property to "{Binding SelectedItem ElementName=lbParent}".
Consider using a Converter to help you get specific data that is not accessible thru xaml or if you need to do some caculations.
Hope this helps.