C# WPF Adding scroll bar in Stackpanel

Question

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my scroll bar isn't showing up on the stackpanel this is my XML code

XML

<StackPanel Height="166" HorizontalAlignment="Left" Margin="325,1,0,0" Name="SP1" VerticalAlignment="Top" Width="620" Orientation="Horizontal" CanHorizontallyScroll="True" ForceCursor="False" SnapsToDevicePixels="True" OverridesDefaultStyle="True">
            <StackPanel.ScrollOwner>
                <ScrollViewer HorizontalContentAlignment="Center" CanContentScroll="True" PanningMode="HorizontalOnly" SnapsToDevicePixels="True" HorizontalScrollBarVisibility="Visible" DataContext="{Binding}">
                    <ScrollViewer.Background>
                        <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
                            <GradientStop Color="Black" Offset="0" />
                            <GradientStop Color="Red" Offset="1" />
                        </LinearGradientBrush>
                    </ScrollViewer.Background>
                </ScrollViewer>
            </StackPanel.ScrollOwner>
        </StackPanel>

and this is my code when i add the items

private void button1_Click(object sender, RoutedEventArgs e)
        {
            DateTime dt1 = Convert.ToDateTime(label1.Content + "/" + label2.Content + "/" + label5.Content);
            DateTime dt2 = Convert.ToDateTime(label3.Content + "/" + label4.Content + "/" + label6.Content);
            TimeSpan ts =  dt2-dt1 ;
            int days = ts.Days;
            label14.Content = ts.Days;
            for (int i = 0; i < ts.Days; i++)
            {
                TextBlock TXB = new TextBlock();
                TXB.Background = new LinearGradientBrush(Colors.Red, Colors.LightCyan, new Point(0, 0), new Point(1, 1));
                TXB.Text =  i.ToString();
                TXB.Width = 30;
                TXB.Name = "T" + i.ToString();
                this.SP1.Children.Add(TXB);
               
            }

and when it goes over the scroll bar doesn't show up, can anyone help me?

Posted 11-Jun-11 22:15pm

C.CoderCreator

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nit_singh · Answer 1 · 2011-06-12T09:39:00

Why are you making ScrollViewer as a child of the stack panel. Make the scroll viewer as a Parent of the stack panel and then add the child elements to the stack panel

try like that

<ScrollViewer CanContentScroll="True" SnapsToDevicePixels="True" HorizontalScrollBarVisibility="Visible"PanningMode="HorizontalOnly" DataContext="{Binding}" Width="300">
            <StackPanel Height="166" HorizontalAlignment="Left" Name="SP1" VerticalAlignment="Top" Width="620" Orientation="Horizontal" CanHorizontallyScroll="True" ForceCursor="False" SnapsToDevicePixels="True" OverridesDefaultStyle="True">
            </StackPanel>
        </ScrollViewer>

Whenever you need ScrollBar, then add that element under ScrollViewer. ScrollBar will automatically come.

Tarun.K.S · Answer 2 · 2011-06-11T22:48:00

Solution 1

How about putting the Stackpanel inside a ScrollViewer.

XML

<ScrollViewer HorizontalContentAlignment="Center" CanContentScroll="True" PanningMode="HorizontalOnly" SnapsToDevicePixels="True" HorizontalScrollBarVisibility="Visible" DataContext="{Binding}">
<scrollviewer.background>
<LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
                            <GradientStop Color="Black" Offset="0" />
                            <GradientStop Color="Red" Offset="1" />
                        </LinearGradientBrush>
</scrollviewer.background>
<stackpanel name="SP1"></stackpanel>

Now the StackPanel should scroll.

Posted 11-Jun-11 22:48pm

Tarun.K.S

Updated 12-Jun-11 8:46am

v3

Comments

Tarun.K.S 12-Jun-11 4:51am

Also close the ScrollViewer at the end.

[no name] 12-Jun-11 6:48am

can you please tell me what i did wrong?

Tarun.K.S 12-Jun-11 7:59am

Unfortunately, I am not sure what ScrollOwner property does. Here is the explanation that MSDN states: http://msdn.microsoft.com/en-us/library/system.windows.controls.stackpanel.scrollowner%28v=VS.90%29.aspx.

Tarun.K.S 12-Jun-11 8:00am

Anyway did my solution work for you?

[no name] 12-Jun-11 8:25am

i seem to get an error with that code i get ( Error 1 The attachable property 'background' was not found in type 'scrollviewer'. C:\Users\Kyle\documents\visual studio 2010\Projects\DaysUntill\DaysUntill\MainWindow.xaml 94 22 DaysUntill
)

Tarun.K.S 12-Jun-11 13:00pm

Please make the "s" and the "b" in the scrollviewer and background in capital letters. It should be ScrollViewer.Background and not scrollviewer.background.
Hope it helped now.

Tarun.K.S 12-Jun-11 15:20pm

Please do vote and accept the answer if it helped. Thanks.

Sergey Alexandrovich Kryukov 12-Jun-11 14:40pm

Looks correct, a 5.
--SA

Tarun.K.S 12-Jun-11 14:45pm

Thanks SA! :)