Question

I have a UserControl in WPF that contain a textBox. My user control is placed on a WPF window. I also have a DataGrid on that window. I need to bind the text box to a property of the selected item in the dataGrid.

Answer 1

You can try with this code

        <Binding ElementName="GridId" Path="SelectedItem.Content"/>

Sample

<TextBox>
    <TextBlock.Text>
            <Binding ElementName="GridId" Path="SelectedItem.Content"/>
    </TextBox.Text>
</TextBox>