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Questions - validationrules

Validation rule property: how to bind without using dependency properties

In my WPF MVVM app I have a TextBox which has bound a validation rule. In validation rule class I have below property: public bool CanBeValidated { get; set; } = false; Then in the view my TextBox ha...
test-img

Willy

wpf

mvvm

data-binding

dependency-properties

validationrules

Votes: 0

Answers: 1

Latest Answer

You could create a wrapper class that derives from DependencyObject and exposes a dependency property. Then you add a CLR property to the ValidationRule class that returns an instance of this wrapper ...
test-img

mm8

WPF TextBox not displaying validation error message

I have bound a validation rule to my WPF TextBox in order to control what user types in. WPF TextBox: <TextBox Grid.Column="0" Grid.Row="1" IsEnab...
test-img

Willy

wpf

textbox

staticresource

validationrules

multidatatrigger

Votes: 0

Answers: 1

Latest Answer

Just add a Border to the ControlTemplate: <Style x:Key="ValidationTextBoxErrorStyle" TargetType="{x:Type TextBox}"> <Style.Triggers> <MultiDataTrigger>...
test-img

mm8

Setting Validation.ErrorTemplate as Style on a WPF TextBox is causing a binding error exception

In my WPF app I have a below resource: <ResourceDictionary> <Style x:Key="OnErrorTextBoxStyle" TargetType="{x:Type TextBox}"> <Style.Triggers> ...
test-img

Willy

wpf

data-binding

textbox

staticresource

validationrules

Votes: 0

Answers: 1

Latest Answer

Try this binding in the ControlTemplate: <TextBlock FontSize="11" FontStyle="Italic" Foreground="Red" Text="{Binding [0].ErrorContent}" /> ...
test-img

mm8

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