WPF Canvas ScrollViewer

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Hi,

I am trying to put a canvas control into a scrollviewer. The canvas control is dynamic, that means i am creating their children in c# code during runtime.

XML

<ScrollViewer Grid.Row="1">
    <Canvas Name="cvHeats" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"/>
</ScrollViewer>

My problem is, that the scrollbars are displayed, but they are disabled. How
can i make the scrollviewer work for a canvas with dynamic content?

Thanks in advance,
Manu

Posted 16-Apr-12 4:10am

m.bleimuth

Updated 11-Aug-16 7:35am

v2

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Deepak_Sharma_ · Answer 1 · 2012-04-16T05:57:00

Solution 1

This link may help you :
stackoverflow.com/questions/3061400/scrollbars-are-not-visible-after-changing-positions-of-controls-inside-a-canvas

Posted 16-Apr-12 5:57am

Deepak_Sharma_

Shmuel Zang · Answer 2 · 2012-04-16T09:08:00

Solution 2

Try to give a size to the Canvas. Something like:

XML

<ScrollViewer Grid.Row="1">
    <Canvas Name="cvHeats" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
            Width="1000" Height="1000" />
</ScrollViewer>

Posted 16-Apr-12 9:08am

Shmuel Zang

ryanba29 · Answer 3 · 2016-08-11T07:35:00

You can set your controls up in xaml as follows:

C#

<scrollviewer scrollviewer.horizontalscrollbarvisibility="Auto">
                 ScrollViewer.VerticalScrollBarVisibility="Auto">
                <canvas x:name="canMain" xmlns:x="#unknown">
                    <image x:name="imgMain" />
                </canvas>
            </scrollviewer>

Then subscribe to the inner controls size changed event. In my case I'm using a image but you can replace it what ever suits your needs.

C#

imgMain.SizeChanged += ImgMain_SizeChanged;

Then in the set the width and height of your canvas to the new sizes of you image.

C#

private void ImgMain_SizeChanged(object sender, SizeChangedEventArgs e)
        {
            canMain.Height = e.NewSize.Height;
            canMain.Width = e.NewSize.Width;
        }

Tushar15 · Answer 4 · 2013-01-17T00:01:00

Solution 3

C#

Consel.write("HEloo");

Posted 17-Jan-13 0:01am

Tushar15