Question

initially I had a window with lots of bindings like this one:

<TextBox Grid.Row="3" Grid.Column="1" Text="{Binding Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, Path=DatabaseServer}" />

Now I have to add validation to each binding and I end with:

<TextBox Grid.Row="3" Grid.Column="1" >
    <TextBox.Text>
        <Binding Path="DatabaseServer" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged">
            <Binding.ValidationRules>
                <Utils:NotEmptyStringValidator />
            </Binding.ValidationRules>
        </Binding>
    </TextBox.Text>
</TextBox>

Can this be written with less text? Otherwise I will end with a hard to maintain window.

Answer 1

From the Binding Markup Extesnions page on MSDN:

The following are properties of Binding that cannot be set using the
Binding markup extension/{Binding} expression form.

ValidationRules : the property takes a generic collection of
ValidationRule objects. This could be expressed as a property element
in a Binding object element, but has no readily available
attribute-parsing technique for usage in a Binding expression. See
reference topic for ValidationRules.

So, no, there is not a more concise markup.

Unless you want to write your own markup extension?