Question

I am a newbie with DataGrids in WPF C#.

I have two DataGrids on two different tab controls.

Now one of them works (which means I am able to dynamically create and add columns and access datagrid1 and its methods)
While with other one datagrid2 I am not able to do the above in any private methods. (I copy pasted datagrid1 properties and renamed it datagrid2)
However with datagrid2, when I use inside the Windows_Loaded method, I am able to do these things.

What am I doing wrong?
Here’s the code:

<my3:DataGrid AutoGenerateColumns="False" CanUserAddRows="False" 
CanUserDeleteRows="False" Block.TextAlignment="Center" HeadersVisibility="Column"  
AlternationCount="2" ItemsSource="{Binding}" IsReadOnly="True" 
AlternatingRowBackground="LightYellow" Margin="6,57.772,12.489,6" Name="datagrid2" 
xmlns:my3="http://schemas.microsoft.com/wpf/2008/toolkit">
</my3:DataGrid>

Answer 1

Generally speaking, never try to access and manipulate UIElements in the constructor.

Instead, handle the Loaded event of your container (usually a UserControl, Control, Window, or Page) and manipulate your UIElements there.