Set Grid Column/Row width/Height dynamically

Question

I need to create a WPF grid dynamically from code behind. This is going okay and I can do it so that I set the content widths but what I need to do is set them so that when i resize the window the controls are re sized dynamically

var col = new ColumnDefinition(); col.Width = new System.Windows.GridLength(200); grid1.ColumnDefinitions.Add(col); 

This will produce XAML

<Grid.ColumnDefinitions>      <ColumnDefinition Width="200"></ColumnDefinition> </Grid.ColumnDefinitions> 

But what I need is to use a * or question mark ie.

<Grid.ColumnDefinitions>      <ColumnDefinition Width="*"></ColumnDefinition> </Grid.ColumnDefinitions> 

But the WidthValue does not support a * or question mark a when creating from code behind ?

Answer 1

You could specify it like this:

For auto sized columns:

GridLength.Auto 

For star sized columns:

new GridLength(1,GridUnitType.Star) 

Answer 2

There is 3 types of setting Width to Grid ColumnDefinitions:

For Percentage Column:

 yourGrid.ColumnDefinitions[0].Width = new GridLength(1, GridUnitType.Star);  

In xaml:

<ColumnDefinition Width="1*"/> 

For Pixel Column

yourGrid.ColumnDefinitions[0].Width = new GridLength(10, GridUnitType.Pixel); yourGrid.ColumnDefinitions[0].Width = new GridLength(10);  

In xaml:

<ColumnDefinition Width="10"/> 

For Auto Column

yourGrid.ColumnDefinitions[0].Width = GridLength.Auto; 

In xaml:

<ColumnDefinition Width="Auto"/> 

Hope it helps!