I have a seemingly simple use case but its been troubling me for hours
I have a grid with two rows and two columns, the first column should take all the available width and the second column should take the width it requires. The problem is with the 'required width' of the second column. This column contains a datagrid in the top row and a label (for simplicity) in the bottom row.
The datagrid has two columns which should both take up 50% width of the datagrid.
I want:
If the label is wider than the datagrid the datagrid should scale up (and NO semi column MAY appear at the end of the datagrid filling up the remaining space)
If the datagrid is wider than the label, the column may not be
smaller than the required size for the datagrid.
The problem:
If I set the datagrid columns to take all available space (width='*') it works if the label is bigger than the datagrid (but if the label is smaller the datagrid shrinks to the width of the label, and not al text is readable)
If I set the columns to 'autosize' it works is the label is smaller than the datagrid (but if the label is bigger the 'semi' column appears (and it really hurts my eyes)).
The code:
x:Class="WpfApp1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApp1"
mc:Ignorable="d"
Title="MainWindow" Height="200" Width="400">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<Grid Grid.Column="1" Name="grid">
<!-- Change column width to simulate the problemn-->
<DataGrid ItemsSource="{Binding Items}" ColumnWidth="*" RowHeaderWidth="0" Width="{Binding Path=ActualWidth, RelativeSource={RelativeSource AncestorType={x:Type Grid}}}"/>
</Grid>
<!-- change label text to simulate problemn-->
<Label Grid.Row="1" Grid.Column="1" Content="x"/>
</Grid>
The binding to the actual width of the grid is to have the columns scale up correctly
The Items is a List of objects (which contain two string values)
This is dirty and would probably cause me to rethink my design, but it works based on your requirements. I'm not sure how else to achieve this without creating a custom control or greatly modifying the DataGrid default template, but here goes.
Change your DataGrid styling to this and give names to both the Label and the DataGrid.
<DataGrid Name="dg" ItemsSource="{Binding Items}" CanUserResizeColumns="False"/>
///
<Label Grid.Row="1" Grid.Column="1" Content="x" Name="label"/>
Then create a ContentRendered event for your MainWindow.
Title="MainWindow" Height="450" Width="800" Name="mw" ContentRendered="Mw_ContentRendered">
Now in the render event, manually resize columns after the render occurs. You can't assign a star to the width as it won't resize correctly, so you need to divide your widths evenly base on column count.
private void Mw_ContentRendered(object sender, EventArgs e)
{
//Loop through columns and resize
for (int x = 0; x < dg.Columns.Count; x++)
{
double div = dg.ActualWidth / dg.Columns.Count;
double add = div - dg.Columns[x].ActualWidth;
if (add < 0) { div += -add; }
dg.Columns[x].Width = new DataGridLength(div);
}
}
EDIT: Updated width logic to account for uneven widths
I ended up creating my own user control.
This was relatively easy as I know at design time which rows I will have in the 'datagridview'.
Tronald's suggestion works, provided that the data does not change after rendering (mine does, both the datagrid contents and the 'label' change based on selections made in the rest of the application).
I still think that the 'Width="*" MinWidth="auto"' combination should be possible for a datagrid so If anybody has a solution.
Related
I recently experienced a strange behavior of text boxes.
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="200"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<Label Content="Test"/>
<TextBox Grid.Column="1" TextWrapping="Wrap" Text="testtesttesttesttesttesttesttesttesttesttest"/>
<Control Grid.Row="1" Grid.ColumnSpan="2" Width="280"/>
</Grid>
In this example code I have a Grid with 2 rows and 2 columns. The 2nd column is set to a fixed width. The TextBox has TextWrapping set to Wrap.
In the second row I have a Control with a fixed width that is higher than the Grid would normally be. This increases the ActualWidth of the second column from 200 to about 250.
The actual width of the TextBox also increases to match the new width of the column.
When I now add a long string to the text box the text, it doesn't use the full width of the TextBox but instead wraps way to early and leaves about 40 pixels at the end of the TextBox empty.
I've found out that the TextBox has a readonly ExtentWidth property. This property is responsible for the wrapping. In my example the values of the ExtentWidth is about 180, which is the 200 from the width of the grid column minus margins and paddings.
What can I do to fix the wrapping in the TextBox?
EDIT: This question is not a duplicate of Looking for explanation for WPF Grid ColumnSpan behavior.
That question explains what happens to the Widths of the grid columns. But it doesn't answer the question regarding the wrapping behavior of the TextBox.
I honestly don't understand the "why" part, but until someone provides a meaningful explanation, here are some workarounds:
Set an explicit width on the TextBox
Set MaxWidth on the column instead of Width
Bind the width of the TextBox to that of another element inside the same column. e.g:
<TextBox Grid.Column="1" Width="{Binding ActualWidth, ElementName=rect}" ... />
<Rectangle Grid.Column="1" x:Name="rect"/>
Note that the last one is the only usable workaround if you need to be able to change the column width at runtime and want the TextBox (and the wrapping) to change with it.
I have the problem, that my Grid is not filling the space as I want it.
Here some code:
<HubSection>
<Grid Width="850">
<Grid.RowDefinitions>
<RowDefinition Height="35"/>
<RowDefinition Height="*"/>
<RowDefinition Height="310"/>
</Grid.RowDefinitions>
<Input:RadDatePicker Grid.Row="0" Value="{Binding CurrentDate, Mode=TwoWay}" />
<ListView
Grid.Row="1">...
</ListView>
<Grid Height="310"
Grid.Row="2">...
</Grid>
...
I want that the middle row is filling the space up of the hubsection. Instead it now just fills up when the listview contains enough items.
Any idea?
Now the filled ListView:
I would try setting the VerticalContentAlignment of the HubSection to Stretch as well as setting the VCA of the outer grid to that option. I'm suspecting the default might be Center or Top and so the minimizing vertical alignment control from the parent control and the expanding star-sized row setting of the inner grid come in a little bit of a conflict that some layout prioritizing rules probably resolve in getting the VCA rule to win.
For similar layout issues it is usually best to analyze with a visual tree debugger such as the XAML Spy or WinRT XAML Toolkit. You can also try tracing these various properties by walking the visual tree with the VisualTreeHelper class yourself.
In a WPF application I have a textbox. I have set AcceptReturn to true
But I need to make the textbox bigger when the user clicks enter. What I mean is currently when the user clicks on the enter key, the cursor goes to a new line however the text box is still the same height and the above line is now hidden. Can I make the textboxHeight change dynamically depending on it's content?
Thanks
PS: I cannot use textarea I need to stay with the textboxes
I would suggest to keep it a current size and use the vertical scrollbar. But, if you're doing something that really requires it, place your TextBox into a Grid. Set the Grid row height to auto. Set the Height of the TextBox to Auto. Set the VerticalAlignment of the textbox to Stretch. In the code below I left the scrollbar settings in. You can change those how you see fit.
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TextBox Grid.Row="0" x:Name="scriptTextBox" Margin="10" Height="Auto" Width="Auto" FontFamily="Consolas, Courier New"
HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"
MaxLines="9999" AcceptsReturn="True" AcceptsTab="True" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
Text="{Binding Path=Script, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
/>
</Grid>
You say you need to use Textboxes. Can you at least use an overriden Textbox? This worked pretty well in my testing:
public class AutoHeightTextbox : TextBox {
protected override Size ArrangeOverride(Size arrangeBounds) {
Size unboundSize = new Size(this.Width, double.PositiveInfinity);
Size textSize = base.MeasureOverride(unboundSize);
this.Height = textSize.Height;
return base.ArrangeOverride(arrangeBounds);
}
}
I'm developing metro app using C# and XAML, I'm stuck with grid view that my grid view consist of multiple grids by default grid view assigns equal width to all grids,But i wanna give different width for each grid.example code is below
<GridView x:Name="ObjGridView">
<Grid Background="Black" Height="400" Width="464">
</Grid>
<Grid Background="Blue" Height="400" Width="464">
</Grid>
<Grid Background="Blue" Height="400" Width="464">
</Grid>
<!--Up to n Grids-->
</GridView>
So,Is there any way to give width for grids manually or can change the column width of grid view. Please help me. Thanks in advance.
Maybe this can solve your problem:
How To: Create a Variable Sized Grouped GridView (like the store)
Discussion about this on msdn
Is it possible to set the width of a column for Grid within Silverlight? I have a grid (not a grid view) with two columns. ColumnA and ColumnB. What I am trying to accomplish is when a user clicks on a button within ColumnA the width of ColumnA is set to .01. ColumnB should then expand the entire width of the grid to fill the remaining area. Similar to how you pin or un-pin a dock panel?
Is this the best approach or should I revert back to a dockpanel and let SL handle it? I'd prefer to manage it myself vs. using a RAD control as I think it is a little bloated for such a small and seemingly simple task.
Another thought I had was to use a gridsplitter but I was unsure as to how to programmatically collapse or expand the column using the gridsplitter? Hence my current predicament. Any suggestions would be greatly appreciated.
Thanks in advance
Give your ColumnDefinition a name via the Name attribute, e.g.:
<ColumnDefinition Width="100" Name="FooColumn"/>
Then you can assign it a new Width in code whenever you want:
FooColumn.Width = new GridLength(1);
(edit: should have used the same name in both places... oops.. you get the idea though)
Try this
<Grid x:Name="LayoutRoot" Background="White" ShowGridLines="True">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<sdk:GridSplitter />
</Grid>
LayoutRoot.ColumnDefinitions.First().Width = new GridLength();