WPF TextBox autogrow - wpf

I have a TextBox with a height=15 and width=50. I want the textbox to grow when the text size exceeds 50. I want to achieve this without using Width="Auto". Is there any way to achieve this? I tried TextWrapping = TextWrapping.Wrap without any success.
Appreciate your help!!

Set the MinWidth=50

Let's say your text box is inside a grid which has 2 columns
<Grid>
<Grid.ColumnDefinitions>
//The first column is used for a label
<ColumnDefinition Width="Auto"/>
//This column is used for your text box
<ColumnDefinition Width="*"
MinWidth="25"/>
</Grid.ColumnDefinitions>
<Label Grid.Column="0"
Content="Something:"
/>
<TextBox Grid.Column="1"
Content="BindToProperty"
/>
</Grid>
and the height and width of your user control is set to
Auto
So whenever you place the user control on to other controls, it will have the minimum width of
25 + label width
. If you want to increase the width, you can set the width directly to your user control, and the Textbox will be stretched out.
Cheers

Related

How to prevent TextBox from stretching vertically inside Grid

In the markup below, the text box vertically to fills the entire grid row, no matter how big the row's height is. For a single line text box this does not look good. I need it to center vertically instead and have the height just enough to fit the current font. Setting the Height property on the text box helps but I do not want to hard code the height in case the font changes.
<Grid FocusManager.FocusedElement="{Binding ElementName=TitleBox}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<TextBox Name="TitleBox"
Text="{Binding Title, UpdateSourceTrigger=PropertyChanged}"
Grid.Column="0" />
<Button Command="{Binding CreateCommand}"
IsDefault="True"
Grid.Column="1">Create</Button>
</Grid>
Set the VerticalAlignment of the text box to Center. The default is Stretch which explains why it stretches to fill the entire grid cell:
VerticalAlignment="Center"

How to align buttons on opposite sides of window in WPF?

trying first time WPF user. I read through some WPF layout docs but am not getting the hang of the layout of buttons. I'm trying to get the layout below -- where there's a button in the lower left corner and two in the lower right.
Can this be done with a single StackPanel? I tried unsuccessfully with this along with the HorizontalAlignment attributes of the buttons.
Is it more appropriate to be using a 1 row, 2 column grid, with each cell having a StackPanel?
Any suggestions much appreciated, thanks!
Personally, I tend to prefer doing this with a Grid, ie:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Button Grid.Column="0" Width="100">b1</Button>
<Button Grid.Column="1" Width="100">b2</Button>
<Button Grid.Column="2" Width="100">b3</Button>
</Grid>
This will cause the 2nd & 3rd columns to fit their contents, and the first to fill the rest of the space. If you place each button in the appropriate column, you'll get that layout. (Note that you'll likely want to adjust the sizing and margins on the buttons to get nice spacing, as well.)

Grid layout issue

I have the following xaml:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="150"/>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Left" Grid.Column="1">
<TextBox Width="120" Text="Search" Margin="10"/>
<Button>Search</Button>
</StackPanel>
</Grid>
In both the designer and the running application the right edge of the button is cut off, but only if the textbox has a margin on the right side. How do I create separation between the two without cutting off the buttton. Is this a bug?
Edit:
The StackPanel is in Column 1 not Column 0. Additionally, the button border reappears after the button has been clicked. Window size is 525 and the grid is the only thing in it.
Set your first ColumnDefintion's Width to Auto
I'm guessing that since the width is not defined, it's making them both *, which means they'll be of an equal width. By setting the 1st to Auto you're telling it to take up however much space it needs, then letting the 2nd column fill the remaining space.
It isn't a bug- the combination of the 120px of width (of the text box) + the width of the button when it's contents is the string "Search" (whatever that may be) + the 150px of the first column is wider than whatever is the space allocated by the container of the Grid.
What did you expect to happen? Scrollbars?

Letting a child control width size to fit and limiting its max value

Edit: I try rephrasing my question, sorry if it was not clear. Thanks to all anyway.
Say I have a UserControl whose layout has a grid with 1 row x 3 columns, the first 2 autosized and the third star-sized:
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<ComboBox MinWidth="80" MaxWidth="150" .../>
<CheckBox Grid.Column="1" VerticalAlignment="Top".../>
<TextBox Grid.Column="2" MaxHeight="400" TextWrapping="Wrap" HorizontalAlignment="Stretch"...>
</Grid>
The TextBox has text wrapping and its vertical scrollbar visibility set to auto and its horizontal one hidden.
Now, I have some window including a ListBox whose items are instances of this UserControl, like:
<ListBox HorizontalContentAlignment="Stretch".../>
The ListBox is in a 1-column star-sized grid and thus stretches to fit all the available width in its container. When I resize the container of this ListBox the ListBox too resizes as expected as it is stretched in a star-sized Grid column; and the same holds true for the ListBox items', which too are stretched and in this case happen to be instances of a UserControl with the above layout (3 columns in a grid, the 3rd star-sized).
The problem is that the TextBox in the 3rd column of the UserControl used as a listbox item should not automatically increase its width when I type into it some long text: it should just wrap, increasing its height (up to a maximum height; then the vertical scrollbar will appear). In other words, its MaxWidth should be determined by the available space, like its Width.
How should I code my XAML for this?
That should be the behavior by default, based on the code you've posted.
Try setting your TextBox's HorizontalAlignment="Stretch"

How to automatically collapse a Grid Column in xaml?

Basically I'm getting some data from a service and displaying the results in a listbox. The template for the items is using a grid. NOTE: If there is a better way let me know.
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Image Grid.Column="0"/>
<TextBlock Grid.Column="1"/>
</Grid>
The problem is, that sometimes an image is not returned. In that case the column for the image should collapse and the text column should take up the full width.
I've tried a couple of different ways already with no luck. How can I collapse this column when no image is returned?
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Image Grid.Column="0"/>
<TextBlock Grid.Column="1"/>
</Grid>
Setting the image column width to auto will resize the column width according to the image size. If there is no image the size will be set to 0. The text column is set to *, this way it always takes all the available space.
Note: If your images are big, you may need to set MaxWidth as well.
You can use Expander control and set IsExpanded property.

Resources