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POValidate telerik GridView every control in every row (ValidationRule). WPF
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  1. POValidate telerik GridView every control in every row (ValidationRule). WPF
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    copied!<p>I have a RadGridView with 9 columns. Every column contains textbox, except 2nd and 9th: there's a combobox in 2nd and image for drag'n'rop in the 9th. I need to validate my GridView in the way that if any column in row is empty, I can't click save button.</p> <p>Every cell is defined as data template:</p> <p></p> <pre><code> &lt;t:RadGridView.Resources&gt; &lt;DataTemplate x:Key="DraggedItemTemplate"&gt; &lt;StackPanel&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;TextBlock Text="{x:Static p:Resources.AddStandardWindow_TextBlock_Dragging}" /&gt; &lt;TextBlock Text="{Binding CurrentDraggedItem.SpecificationName}" FontWeight="Bold" /&gt; &lt;/StackPanel&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;TextBlock Text="{Binding CurrentDropPosition}" FontWeight="Bold" MinWidth="45" Foreground="Gray"/&gt; &lt;TextBlock Text=", (" Foreground="Gray" /&gt; &lt;TextBlock Text="{Binding CurrentDraggedOverItem.SpecificationName}" Foreground="Gray" /&gt; &lt;TextBlock Text=")" Foreground="Gray" /&gt; &lt;/StackPanel&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/t:RadGridView.Resources&gt; &lt;t:RadGridView.Columns&gt; &lt;t:GridViewColumn&gt; &lt;t:GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;t:RadButton Content="X" Click="OnDeleteSpecificationButtonClicked" Style="{StaticResource ButtonCustomStyleRed}" /&gt; &lt;/DataTemplate&gt; &lt;/t:GridViewColumn.CellTemplate&gt; &lt;/t:GridViewColumn&gt; &lt;t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Specifications}"&gt; &lt;t:GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" TextChanged="OnRowTextBoxesTextChanged" Text="{Binding SpecificationName}"/&gt; &lt;/DataTemplate&gt; &lt;/t:GridViewColumn.CellTemplate&gt; &lt;/t:GridViewColumn&gt; &lt;t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Parameter}" Width="20*"&gt; &lt;t:GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;t:RadComboBox x:Name="ParameterComboBox" Style="{StaticResource ComboBoxStyle}" ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type t:RadWindow}}, Path=DataContext.Parameters}" DisplayMemberPath="NameUnitOfMeasure" SelectionChanged="OnParameterBoxChanged"&gt; &lt;t:RadComboBox.SelectedItem&gt; &lt;Binding Path="Parameter" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged" ValidatesOnDataErrors="True"&gt; &lt;Binding.ValidationRules&gt; &lt;validation:ProductVariantValidation ValidatesOnTargetUpdated="True" /&gt; &lt;/Binding.ValidationRules&gt; &lt;/Binding&gt; &lt;/t:RadComboBox.SelectedItem&gt; &lt;/t:RadComboBox&gt; &lt;/DataTemplate&gt; &lt;/t:GridViewColumn.CellTemplate&gt; &lt;/t:GridViewColumn&gt; &lt;t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Nominal}" Width="20*"&gt; &lt;t:GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" TextChanged="OnRowTextBoxesTextChanged" KeyDown="OnKeyDown" Text="{Binding Nominal, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" SourceUpdated="OnNominalOrAccuracySourceUpdated"&gt; &lt;/TextBox&gt; &lt;/DataTemplate&gt; &lt;/t:GridViewColumn.CellTemplate&gt; &lt;/t:GridViewColumn&gt; &lt;t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Accuracy}" Width="10*" Background="#D8E5F0"&gt; &lt;t:GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" KeyDown="OnKeyDown" Text="{Binding Accuracy, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" TextChanged="OnRowTextBoxesTextChanged" SourceUpdated="OnNominalOrAccuracySourceUpdated" /&gt; &lt;/DataTemplate&gt; &lt;/t:GridViewColumn.CellTemplate&gt; &lt;/t:GridViewColumn&gt; &lt;t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Precision}" Width="10*" Background="#D8E5F0"&gt; &lt;t:GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;TextBox KeyDown="OnKeyDown" Text="{Binding Presition, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" TextChanged="OnRowTextBoxesTextChanged" Style="{StaticResource OverrideDefaultTextBoxStyle}"&gt; &lt;/TextBox&gt; &lt;/DataTemplate&gt; &lt;/t:GridViewColumn.CellTemplate&gt; &lt;/t:GridViewColumn&gt; &lt;t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Min}" Width="10*"&gt; &lt;t:GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" TextChanged="OnRowTextBoxesTextChanged" KeyDown="OnKeyDown" Text="{Binding Minimum, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" SourceUpdated="OnMinOrMaxSourceUpdated"&gt; &lt;/TextBox&gt; &lt;/DataTemplate&gt; &lt;/t:GridViewColumn.CellTemplate&gt; &lt;/t:GridViewColumn&gt; &lt;t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Max}" Width="10*"&gt; &lt;t:GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" TextChanged="OnRowTextBoxesTextChanged" KeyDown="OnKeyDown" Text="{Binding Maximum, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" SourceUpdated="OnMinOrMaxSourceUpdated"&gt; &lt;/TextBox&gt; &lt;/DataTemplate&gt; &lt;/t:GridViewColumn.CellTemplate&gt; &lt;/t:GridViewColumn&gt; &lt;t:GridViewColumn Width="40"&gt; &lt;t:GridViewColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;Image Source="/Images/UpDown.png" Height="34" Width="34" Stretch="None"/&gt; &lt;/DataTemplate&gt; &lt;/t:GridViewColumn.CellTemplate&gt; &lt;/t:GridViewColumn&gt; &lt;/t:RadGridView.Columns&gt; &lt;/t:RadGridView&gt; </code></pre> <p>I tried to apply a validation rule for one of the controls so that if validation has errors, a save button is disabled. here is style for button:</p> <pre><code>&lt;t:RadButton x:Name="SaveBtn" Height="30" Width="150" Content="{x:Static p:Resources.AddStandardWindow_Btn_Save}" Command="{Binding SaveStandardCommand}"&gt; &lt;t:RadButton.Style&gt; &lt;Style TargetType="{x:Type t:RadButton}" BasedOn="{StaticResource ButtonCustomStyleBlue}"&gt; &lt;Setter Property="IsEnabled" Value="false" /&gt; &lt;Style.Triggers&gt; &lt;!-- Require the controls to be valid in order to press OK --&gt; &lt;MultiDataTrigger&gt; &lt;MultiDataTrigger.Conditions&gt; &lt;Condition Binding="{Binding ElementName=StandardTitleTextBox, Path=(Validation.HasError)}" Value="false"/&gt; &lt;Condition Binding="{Binding ElementName=StandardSubtitleTextBox, Path=(Validation.HasError)}" Value="false"/&gt; &lt;/MultiDataTrigger.Conditions&gt; &lt;Setter Property="IsEnabled" Value="true" /&gt; &lt;/MultiDataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/t:RadButton.Style&gt; &lt;/t:RadButton&gt; </code></pre> <p>Here, StandardTitle and StandardSubtitle are out of GridView but if I add new condition with element name, defined in GridView cell templates, ValidationRule is not working because it doesn't see that control.</p> <p>For now, I am trying to achieve my goals in the code behind:</p> <p>protected void OnKeyDown(object sender, KeyEventArgs e) { e.Handled = !IsNumberKey(e.Key) &amp;&amp; !IsActionKey(e.Key); }</p> <pre><code> private bool IsNumberKey(Key inKey) { if (inKey &lt; Key.D0 || inKey &gt; Key.D9) { if (inKey == Key.OemPeriod) return true; if (inKey &lt; Key.NumPad0 || inKey &gt; Key.NumPad9) { return false; } } return true; } private bool IsActionKey(Key inKey) { return inKey == Key.Delete || inKey == Key.Back || inKey == Key.Tab || inKey == Key.Return || Keyboard.Modifiers.HasFlag(ModifierKeys.Alt); } private void OnRowTextBoxesTextChanged(object sender, TextChangedEventArgs e) { var textbox = sender as TextBox; if (null == textbox) return; var gridView = textbox.ParentOfType&lt;GridViewRow&gt;().ParentOfType&lt;RadGridView&gt;(); ValidateGridView(gridView); } void ValidateGridView(RadGridView gridView) { var textboxes = gridView.ChildrenOfType&lt;TextBox&gt;(); var comboboxes = gridView.ChildrenOfType&lt;RadComboBox&gt;(); if (null != textboxes &amp;&amp; null != comboboxes) SaveBtn.IsEnabled = textboxes.All(p =&gt; p.Text.Length != 0) &amp;&amp; comboboxes.All(p =&gt; null != p.SelectedItem); } private void OnParameterBoxChanged(object sender, SelectionChangedEventArgs e) { var combobox = sender as RadComboBox; if (null == combobox) return; var row = combobox.ParentOfType&lt;GridViewRow&gt;(); var boxes = row.ChildrenOfType&lt;TextBox&gt;(); foreach (var textBox in boxes) SaveBtn.IsEnabled = textBox.Text.Length != 0; } private void OnAddSpecificationClick(object sender, RoutedEventArgs e) { var button = sender as RadButton; if (null == button) return; var gridView = button.ParentOfType&lt;RadWindow&gt;().FindChildByType&lt;RadGridView&gt;(); gridView.RowLoaded += OnGridViewRowLoaded; } void OnGridViewRowLoaded(object sender, RowLoadedEventArgs e) { var a = e.Row.ParentOfType&lt;RadGridView&gt;(); ValidateGridView(a); } </code></pre> <p>But when I add new row, the button is still be enabled and there are many other bugs.</p> <p>Is there any normal work around for my problem? Thank you!</p>
 

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