WPF ScrollViewer in grid's column

Question

I need to show the horizontal scrollbar when the width of the window is smaller than width of the text in first column.

<Window x:Class="Sample.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="300"/> 
        <ColumnDefinition Width="80"/>
        <ColumnDefinition Width="*"/>
    </Grid.ColumnDefinitions>

    <ScrollViewer Grid.Column="0" >
        <TextBlock Text="Very looooong text" FontSize="30"/>
    </ScrollViewer>

    <Border Grid.Column="1" Background="Red"/>
    <Border Grid.Column="2" Background="Green"/>

</Grid>
</Window>

What's the best way to do it?

--edit When the user is dragging the right border of the window from right to left first I need to narrow the third column until it disappears, then I need to narrow second column until it disappears, and then when the width of window is smaller than text I need to show the horizontal scrollbar

To get a horizontal scroll bar, you need to set HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled" on your ScrollViewer. — Suresh
– Suresh, Commented Jan 25, 2016 at 21:32
I tried in a sample app and it works.for me. You may need to increase the fontsize to something like 50 to see the effect? — Suresh
– Suresh, Commented Jan 25, 2016 at 21:43
Ok, when the fontsize is bigger your solution works, but I need solution, when the text is not wider than column at the beginning. I need to show scrollbar when user change the width of the window to smaller one. — j3094531
– j3094531, Commented Jan 25, 2016 at 21:58

stratever · Accepted Answer · 2016-01-25 22:42:35Z

2

You set the width of first column to a static value (300) so the column's width will not change when you resize the window. If you set a dynamic value, the ScrollViewer will work as you expect.

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="300*" MaxWidth="300"/>
        <ColumnDefinition MinWidth="80" MaxWidth="80"/>
        <ColumnDefinition Width="*"/>
    </Grid.ColumnDefinitions>

    <ScrollViewer Grid.Column="0" HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Hidden" >
        <TextBlock Text="Very looooong text" FontSize="30"/>
    </ScrollViewer>

    <Border Grid.Column="1" Background="Red"/>
    <Border Grid.Column="2" Background="Green"/>

</Grid>

PS: Width of ScrollViewer must be less than the TextBlock, and the scrolling will work

edited Jan 25, 2016 at 22:42

answered Jan 25, 2016 at 21:55

stratever

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5 Comments

j3094531 Over a year ago

Ok, that's true, but I need the static value of width in the first column, or at least I need the start value 'x' which means "not wider than 'x'". In your solution the first column stretches with whole window.

stratever Over a year ago

Okay, i edited my answer: <ColumnDefinition Width="*" MaxWidth="300"/> is the desired behavior. (also you can specify the MinWidth)

j3094531 Over a year ago

Wait, now I see that column with text becomes narrow simultaneously with the third column, which is not good. When the user is dragging the right border of window from right to left first I need to narrow the third column until it disappear, then I need to narrow second column, and then when the width of window is smaller than text I need to show the horizontal scrollbar

stratever Over a year ago

Edited again. It will behave as you described

j3094531 Over a year ago

Ok, that's it. Thanks

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