Develop Reference

Content Dialog wont change its size

I have a Content Dialog that no matter what options I gave to it (width, height, fullscreen) seems like it would not grow beyond a certain width.
This is the XAML for Content Dialog:
<ContentDialog x:Name="CntdCommand" Title="Comanda" FullSizeDesired="True">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<Grid Grid.Row="0" Grid.Column="0">
<ListView ItemsSource="{Binding SelectedHallTable.Command.CommandItems}">
<ListView.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Border Width="48" Height="48">
<Image Source="../Assets/LoginBackground.jpg" Stretch="UniformToFill"/>
</Border>
<StackPanel Grid.Column="1" VerticalAlignment="Top" Margin="10,0,0,0">
<TextBlock Text="{Binding Product.Name}"></TextBlock>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Cantitate: "></TextBlock>
<TextBlock Text="{Binding Quantity}"></TextBlock>
</StackPanel>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Total: "></TextBlock>
<TextBlock Text="{Binding Total}"></TextBlock>
</StackPanel>
</StackPanel>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Grid>
<Grid Grid.Row="0" Grid.Column="1">
<Pivot ItemsSource="{Binding ProductGroups}" SelectedItem="{Binding SelectedProductGroup, Mode=TwoWay}">
<Pivot.ItemTemplate>
<DataTemplate x:DataType="views:ProductGrouping">
<GridView ItemsSource="{x:Bind}">
<!--<GridView.GroupStyle>
<GroupStyle HeaderTemplate="{StaticResource MenuHeaderTemplate}" />
</GridView.GroupStyle>-->
<GridView.ItemTemplate>
<DataTemplate x:DataType="viewModels:ProductDTOViewModel">
<Grid>
<StackPanel Padding="10">
<Image Source="../Assets/LoginBackground.jpg" Width="64" Height="64" />
<TextBlock Text="{x:Bind Name}"/>
<TextBlock Text="{x:Bind EAN}"/>
</StackPanel>
</Grid>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
</DataTemplate>
</Pivot.ItemTemplate>
</Pivot>
</Grid>
<Grid Grid.Row="1" Grid.Column="0">
<StackPanel Orientation="Horizontal">
<TextBlock Text="Total: "></TextBlock>
<TextBlock Text="{Binding SelectedHallTable.Command.Total}"></TextBlock>
</StackPanel>
</Grid>
<Grid Grid.Row="1" Grid.Column="1">
<CommandBar DefaultLabelPosition="Right">
<AppBarButton Icon="Delete" Label="Sterge" />
<AppBarSeparator></AppBarSeparator>
<AppBarButton Icon="Send" Label="Trimite" />
<AppBarButton Icon="Accept" Label="Incaseaza" />
</CommandBar>
</Grid>
</Grid>
</ContentDialog>
And this is how the result looks like:
I have tried to change its width and height but it doesn't do anything, any help would be appreciated. Thanks!

Set MaxWidth and it should work

Data Grid Template [WPF]

how this type of data grid template can be created??
i can't find any way to make this template.
or can u suggest other way??
i.e. grid view or so and how!
The last column are not required as of now.
CodeBehind:
var pp = from asd in db.OrderMasters
select new
{
asd.CFN,
asd.Location,
asd.CreatedOn,
asd.Quantity
};
dgOrderMaster.ItemsSource = pp.ToList();
Markup:
<DataGrid x:Name="dgOrderMaster" HorizontalContentAlignment="Center" BorderThickness="1" Margin="10" Grid.Row="3">

i worked around, and found listview is way more helpfull for my task,
Here's the markup:
<ListView Name="lvDataBinding" HorizontalContentAlignment="Stretch" BorderThickness="0" Margin="10" Grid.Row="3" Background="{x:Null}">
<ListView.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Black" BorderThickness="0" CornerRadius="3" Margin="0,3" Grid.ColumnSpan="4" Background="White">
<Grid Background="White" Margin="0,1">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
<ColumnDefinition Width="1.5*"/>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="60"/>
</Grid.RowDefinitions>
<StackPanel Orientation="Vertical" Margin="50,5" >
<TextBlock Text="Customer" Foreground="#33B6EF" FontSize="20" />
<TextBlock Text="{Binding cust}" FontSize="20" />
</StackPanel>
<StackPanel Orientation="Vertical" Grid.Column="1">
<TextBlock Text="Location" Foreground="#33B6EF" FontSize="20" />
<TextBlock Text="{Binding loc}" FontSize="20" />
</StackPanel>
<StackPanel Orientation="Vertical" Grid.Column="2">
<TextBlock Text="Created On" Foreground="#33B6EF" FontSize="20" />
<TextBlock Text="{Binding con}" FontSize="20" />
</StackPanel>
<StackPanel Orientation="Vertical" Grid.Column="3">
<TextBlock Text="Quantity" Foreground="#33B6EF" FontSize="20" />
<TextBlock Text="{Binding quant}" FontSize="20" />
</StackPanel>
</Grid>
<Border.Effect>
<DropShadowEffect BlurRadius="5" ShadowDepth="5" />
</Border.Effect>
</Border>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>

WPF ItemsControl content cropping rather than scrolling

I have a .NET 4.0 WPF application using the MVVM pattern and I've been unable to achieve the desired outcome on one of the screens (UserControl as View). I have stripped down most of the page to show the core of the problem. The page consists of a grid with three rows and one column. The first row contains header text and the last row contains a Save button. The middle row contains a grid with one row and column and displays an ObservableCollection in an ItemsControl with a data template of a custom user control. There are ten items in the collection and I want them to display in two columns and five rows so I have a WrapPanel as an ItemsPanelTemplate.
I want the ItemsControl to scroll within the available space but it is expanding to the size of content and most of it is being cropped off the bottom of the page.
I am listing the XAML for user control the ObservableCollection uses as a data template and the XAML for the main page below that. Any help is greatly appreciated.
<UserControl x:Class="OIL.UserControls.ShopNotes.ShopNoteComponent"
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="120" d:DesignWidth="150">
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Border Grid.Row="0" Grid.Column="0" Width="140" Margin="5,5,5,5" HorizontalAlignment="Center" VerticalAlignment="Top" BorderBrush="Black" BorderThickness="1" CornerRadius="5">
<StackPanel Width="120" Margin="0,5,0,5" HorizontalAlignment="Center" VerticalAlignment="Top" Orientation="Vertical">
<Image Height="25" Width="30" HorizontalAlignment="Left" Source="/OIL;component/Images/BlueCam.png">
<Image.ToolTip>
<Image Source="{Binding Path=ToolTipImagePath}" />
</Image.ToolTip>
</Image>
<Label Style="{DynamicResource LargeText}" Content="{Binding Path=ComponentTitle}" />
<CheckBox Width="80" Margin="0,5,0,5" HorizontalAlignment="Left" Style="{DynamicResource NormalText}" Content=" Mandatory?"
IsChecked="{Binding Path=ComponentMandatory, Mode=TwoWay}"
IsEnabled="{Binding Path=ComponentSelected}" />
<CheckBox Width="15" Margin="0,5,0,5" HorizontalAlignment="Center"
IsChecked="{Binding Path=ComponentSelected, Mode=TwoWay}" />
</StackPanel>
</Border>
</Grid>
And here is the main XAML page:
<UserControl x:Class="OIL.View.ConfiguratorViews.Configurator_ShopNotes_Tab"
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:igWPF="http://infragistics.com/Editors"
xmlns:uc="clr-namespace:OIL.UserControls.ShopNotes"
mc:Ignorable="d"
d:DesignHeight="570" d:DesignWidth="866">
<UserControl.Resources>
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
<DataTemplate x:Key="ShopNotesComponentsTemplate">
<uc:ShopNoteComponent />
</DataTemplate>
</UserControl.Resources>
<Border Margin="10" CornerRadius="13" BorderThickness="3" BorderBrush="#FF666666">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="40" />
<RowDefinition Height="*" />
<RowDefinition Height="50" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<StackPanel Grid.Row="0" Grid.Column="0" Orientation="Horizontal">
<Button Height="30" Width="75" Margin="10,5,0,5" HorizontalAlignment="Center" VerticalAlignment="Center" Background="{x:Null}"
Command="{Binding Path=AddNewTemplateCommand}"
Content="Add" />
<Button Height="30" Width="75" Margin="10,5,0,5" HorizontalAlignment="Center" VerticalAlignment="Center" Background="{x:Null}"
Command="{Binding Path=EditTemplateCommand}"
Content="Edit" />
<Grid Margin="10,5,0,5">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<StackPanel Grid.Row="0" Grid.Column="0" Orientation="Horizontal" Visibility="{Binding Path=IsNewTemplate, Converter={StaticResource BooleanToVisibilityConverter}}">
<TextBox Height="30" Width="250" HorizontalAlignment="Left" VerticalAlignment="Center" Style="{DynamicResource NormalText}" Text="{Binding Path=TemplateDescription}" />
</StackPanel>
<StackPanel Grid.Row="0" Grid.Column="0" Orientation="Horizontal" Visibility="{Binding Path=IsEditedTemplate, Converter={StaticResource BooleanToVisibilityConverter}}">
<igWPF:XamComboEditor Name="cmbShopNotesTemplate" Height="30" HorizontalAlignment="Left" VerticalAlignment="Center"
ItemsSource="{Binding Path=ShopNoteTemplates, Mode=TwoWay}"
DisplayMemberPath="CONFIGURATION_DESC"
SelectedItem="{Binding Path=SelectedShopNoteTemplate, ValidatesOnDataErrors=True}"
Value="Select Shop Notes Template"
NullText="Select Shop Notes Template"
IsEditable="True">
</igWPF:XamComboEditor>
</StackPanel>
</Grid>
</StackPanel>
<Grid Grid.Row="1" Grid.Column="0">
<Grid.RowDefinitions>
<RowDefinition Height="40" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Label Grid.Row="0" Grid.Column="0" Height="30" Margin="0,5,0,5" HorizontalAlignment="Center" VerticalAlignment="Center" Style="{DynamicResource NormalText}" Content="* Hover over camera icon to view Shop Note component" />
<ItemsControl Grid.Row="1" Grid.Column="0" HorizontalAlignment="Left"
ItemsSource="{Binding Path=ShopNoteComponents, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
ItemTemplate="{StaticResource ShopNotesComponentsTemplate}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Width="300" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</Grid>
<Button Grid.Row="2" Grid.Column="0" Height="30" Width="150" Margin="10,10,0,10" HorizontalAlignment="Left" VerticalAlignment="Center"
Background="{x:Null}"
Command="{Binding Path=SaveTemplateCommand}"
Content="Save" />
</Grid>
</Border>
EDIT: Changed question title as I have removed the ScrollViewer between starting the question and actually posting it. Also, noticed the Save button was in the inner grid rather than outer grid so I have corrected that (no change in rendering).

An ItemsControl does not have its own ScrollViewer like a ListBox. You can either replace you ItemsControl with a ListBox, or simply wrap it in a ScrollViwer, being careful to move the Grid.Row and Grid.Column settings like this:
<ScrollViewer Grid.Row="1" Grid.Column="0">
<ItemsControl HorizontalAlignment="Left" ItemsSource="{Binding Path=Items,
UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
ItemTemplate="{StaticResource ShopNotesComponentsTemplate}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Width="300" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</ScrollViewer>

Horizontal ListView items do not scroll when swiped in WinRT app?

I have a C# WinRT/8.1 app that uses a ListView with a child stack panel to show items in a horizontal row. That works fine, except I am having the same problem discussed in this SO post:
WinRT Xaml ListView - Touch doesn't scroll well
Except worse. My items don't scroll even when the fingertip is pressed on the margin between items. Unfortunately I don't have a parent Panorama control or ScrollView control to blame. How can I fix this?
NOTE: I switched to a ListView from a GridView because of SO posts I read that indicated GridView's with horizontal items are problematic, which was the case for me.
Here is the XAML for the page:
<Page
<!-- headers snipped for brevity -->
<Page.Resources>
<Converters:DebugBindingConverter x:Key="DebugBindingConverter"/>
<Converters:VideomarkLocationToString x:Key="VideomarkLocationToString"/>
<common:BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
<DataTemplate x:Key="HorzVideomarksItemTemplate1">
<Grid d:DesignWidth="977" d:DesignHeight="746" Height="121" Width="252">
<Grid.RowDefinitions>
<RowDefinition Height="20*"/>
<RowDefinition Height="52*"/>
<RowDefinition Height="23*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<TextBlock x:Name="txtLocation" TextWrapping="Wrap" Text="{Binding OffsetSecs, Converter={StaticResource VideomarkLocationToString}}" Grid.Row="2" />
<TextBlock x:Name="txtNote" Text="{Binding Text}" TextTrimming="CharacterEllipsis"/>
<Image x:Name="imgThumbnail" Grid.Row="1" Source="{Binding ThumbnailAsync}"/>
<!-- <TextBlock x:Name="txtTest2" HorizontalAlignment="Left" Margin="81,93,0,0" TextWrapping="Wrap"
Text="{Binding Videomarks, Converter={StaticResource DebugBindingConverter}}" VerticalAlignment="Top" Height="87" Width="150" FontSize="12"/> -->
</Grid>
</DataTemplate>
</Page.Resources>
<Grid x:Name="gridPage"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Margin="25" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="897*"/>
<ColumnDefinition Width="469*"/>
</Grid.ColumnDefinitions>
<Grid.ChildrenTransitions>
<TransitionCollection>
<EntranceThemeTransition/>
</TransitionCollection>
</Grid.ChildrenTransitions>
<Grid.RowDefinitions>
<RowDefinition Height="140"/>
<RowDefinition Height="347*"/>
<RowDefinition Height="231*"/>
</Grid.RowDefinitions>
<!-- Back button and page title -->
<Grid x:Name="gridTopRow" Grid.ColumnSpan="2">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="120"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button x:Name="backButton" Margin="39,59,39,0" Command="{Binding NavigationHelper.GoBackCommand, ElementName=pageRoot}"
Style="{StaticResource NavigationBackButtonNormalStyle}"
VerticalAlignment="Top"
AutomationProperties.Name="Back"
AutomationProperties.AutomationId="BackButton"
AutomationProperties.ItemType="Navigation Button"/>
<TextBlock x:Name="pageTitle" Text="{StaticResource AppName}" Style="{StaticResource HeaderTextBlockStyle}" Grid.Column="1" TextWrapping="NoWrap" VerticalAlignment="Bottom" Margin="0,0,894,40" Tapped="pageTitle_Tapped"/>
<Button x:Name="exitButton"
Click="exitButton_Click"
Style="{StaticResource ClosePaneAppBarButtonStyle}" Margin="1065,27,0,9" Grid.Column="1" Width="100" Visibility="{Binding Main.IsDebuggerAttached, Converter={StaticResource BooleanToVisibilityConverter}, Mode=OneWay}" />
<Button x:Name="btnTest" Content="test" Grid.Column="1" HorizontalAlignment="Left" Margin="883,59,0,0" VerticalAlignment="Top" FontSize="36" Click="btnTest_Click" Visibility="Collapsed"/>
</Grid>
<WebView x:Name="webViewVideoPlayer" Grid.Row="1" ScriptNotify="ScriptNotifyPlayLocation" Margin="25" />
<Button x:Name="btnVideomark" Content="Bookmark" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="578,53,0,0" Height="54" FontSize="26.667" Click="btnVideomark_Click" Width="181"/>
<ListView
x:Name="listviewVideomarks" Grid.Row="2" Grid.ColumnSpan="2" Opacity="1" IsHitTestVisible="False" Margin="20"
ItemsSource="{Binding Videomarks.VideomarksCollection, Source={StaticResource Locator}}"
ItemTemplate="{StaticResource HorzVideomarksItemTemplate1}" SelectionMode="None"
>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel x:Name="stackVideomarksHorz" Orientation="Horizontal">
</StackPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
<Border x:Name="borderAddVideomark" BorderThickness="5" Grid.ColumnSpan="2" Margin="369,53,319,112" Grid.Row="1" BorderBrush="#FF144989" CornerRadius="25" Opacity="0" IsHitTestVisible="False" Loaded="border_Loaded">
<Grid x:Name="gridAddVideomark" IsHitTestVisible="False" Grid.ColumnSpan="2" Grid.Row="1" Opacity="1" Grid.RowSpan="2">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="187*"/>
<ColumnDefinition Width="188*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="189*"/>
<RowDefinition Height="137*"/>
<RowDefinition Height="62*"/>
</Grid.RowDefinitions>
<TextBlock x:Name="lblVideomarkLocation" Grid.Column="1" TextWrapping="Wrap" Text="TextBlock" Margin="40,10,10,10" FontSize="18.667"/>
<TextBox x:Name="txtVideomarkNote" Grid.Row="1" TextWrapping="Wrap" Grid.ColumnSpan="2" Margin="10,10,10,2"/>
<Button x:Name="btnOk" Content="OK" HorizontalAlignment="Left" Margin="92,10,0,0" Grid.Row="2" VerticalAlignment="Top" Width="192" Foreground="White" FontSize="21.333" Height="45" Click="btnOk_Click"/>
<Button x:Name="btnCancel" Content="Cancel" HorizontalAlignment="Left" Margin="88,10,0,0" Grid.Row="2" VerticalAlignment="Top" Width="192" Foreground="White" FontSize="21.333" Height="45" Grid.Column="1" Click="btnCancel_Click"/>
<Rectangle x:Name="rectVideomarkThumbnail" Fill="#FFF4F4F5" Stroke="Black" Margin="10"/>
</Grid>
</Border>
</Grid>
</Page>

I am not sure which directions you are trying to scroll, but I think your problem will be fixed if you disable the StackPanel scroll and enable scrolling in both directions on the ListView.
<ListView
x:Name="listviewVideomarks" Grid.Row="2" Grid.ColumnSpan="2" Opacity="1" IsHitTestVisible="False" Margin="20"
ItemsSource="{Binding Videomarks.VideomarksCollection, Source={StaticResource Locator}}"
ItemTemplate="{StaticResource HorzVideomarksItemTemplate1}" SelectionMode="None"
ScrollViewer.HorizontalScrollMode="Auto" ScrollViewer.VerticalScrollMode="Auto"
>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel x:Name="stackVideomarksHorz" Orientation="Horizontal"
ScrollViewer.HorizontalScrollMode="Disabled"
ScrollViewer.VerticalScrollMode="Disabled">
</StackPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>

Creating multiple tabitems from tabitem template in WPF C# XAML

I read many tutorials from MSDN about WPF styling and datatemplating and contenttemplating but no success.
I need to make same TabItems in my TabControl and I made manually TabItem which i want to use as host for Style and ContentTemplate for other TabItems in TabControl
<TabItem Header="1.semestar">
<Grid x:Name="GridSemestra">
<Grid.DataContext>
<ViewModel:PredmetVM/>
</Grid.DataContext>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="100"/>
<ColumnDefinition MinWidth="30"/>
</Grid.ColumnDefinitions>
<Grid.Children>
<ListBox x:Name="PredmetiLW" Grid.Row="0" BorderThickness="0" Grid.Column="0" ItemsSource="{Binding Predmeti}" HorizontalAlignment="Center" VerticalAlignment="Center" >
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Naziv}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<ListBox x:Name="RadioLW" Grid.Row="0" Grid.Column="1" BorderThickness="0" ItemsSource="{Binding Predmeti}" HorizontalAlignment="Center" VerticalAlignment="Center" >
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Ocjena}"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<Label Content="Prosjek Semestra :" HorizontalAlignment="Right" VerticalAlignment="Center" Grid.Row="1" Grid.Column="0" />
<Label x:Name="_prosjekSemestra" Grid.Row="1" Grid.Column="1" ContentStringFormat="F2" Content="{Binding _prosjek, Mode=OneWay}" HorizontalAlignment="Center" VerticalAlignment="Center" />
<Label Content="Ostvareni ECTS-ovi :" HorizontalAlignment="right" VerticalAlignment="Center" Grid.Row="2" Grid.Column="0" />
<Label x:Name="_ectsSemestra" Grid.Row="2" Grid.Column="1" Content="{Binding _ectsovi, Mode=OneWay}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid.Children>
</Grid>
</TabItem>

This is how you define a style for any TabItem. In the example I created a white border and a black background for the Header content of the TabItem:
<Style TargetType="{x:Type TabItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Border BorderBrush="White" BorderThickness="5" Margin="2">
<Grid Width="100" Height="100" Background="Black">
<ContentPresenter x:Name="ContentSite"
VerticalAlignment="Center"
HorizontalAlignment="Center"
ContentSource="Header"
RecognizesAccessKey="True"/>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

If you want your items to render with same template set the ItemTemplate for your TabControl like below:
<TabControl ItemsSource="{Binding MyTabItems}">
<TabControl.ItemTemplate>
<DataTemplate>
<Grid x:Name="GridSemestra">
<Grid.DataContext>
<ViewModel:PredmetVM/>
</Grid.DataContext>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="100"/>
<ColumnDefinition MinWidth="30"/>
</Grid.ColumnDefinitions>
<Grid.Children>
<ListBox x:Name="PredmetiLW" Grid.Row="0" BorderThickness="0" Grid.Column="0" ItemsSource="{Binding Predmeti}" HorizontalAlignment="Center" VerticalAlignment="Center" >
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Naziv}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<ListBox x:Name="RadioLW" Grid.Row="0" Grid.Column="1" BorderThickness="0" ItemsSource="{Binding Predmeti}" HorizontalAlignment="Center" VerticalAlignment="Center" >
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Ocjena}"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<Label Content="Prosjek Semestra :" HorizontalAlignment="Right" VerticalAlignment="Center" Grid.Row="1" Grid.Column="0" />
<Label x:Name="_prosjekSemestra" Grid.Row="1" Grid.Column="1" ContentStringFormat="F2" Content="{Binding _prosjek, Mode=OneWay}" HorizontalAlignment="Center" VerticalAlignment="Center" />
<Label Content="Ostvareni ECTS-ovi :" HorizontalAlignment="right" VerticalAlignment="Center" Grid.Row="2" Grid.Column="0" />
<Label x:Name="_ectsSemestra" Grid.Row="2" Grid.Column="1" Content="{Binding _ectsovi, Mode=OneWay}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid.Children>
</Grid>
</DataTemplate>
</TabControl.ItemTemplate>
</TabControl>
Doing this, for all the items in property MyTabItems, TabItems will be generated