[Solved] FormatException thrown on RegularExpressionAttribute

[Lukas]

Hi

I'm having an issue with the RadGridView in conjunction with the RegularExpressionAttribute. The grid has the following code:

<telerik:RadGridView Grid.Row="3"
                     Grid.Column="0"
                     Grid.ColumnSpan="5"
                     AutoExpandGroups="True"
                     AutoGenerateColumns="False"
                     CanUserDeleteRows="False"
                     CanUserFreezeColumns="False"
                     CanUserInsertRows="False"
                     CanUserSelect="True"
                     CanUserSortColumns="False"
                     CanUserSortGroups="False"
                     IsFilteringAllowed="False"
                     ItemsSource="{Binding Templates}"
                     SelectedItem="{Binding SelectedTemplate, Mode=TwoWay}"
                     ShowGroupPanel="False">
    <telerik:RadGridView.GroupDescriptors>
        <telerik:GroupDescriptor Member="Category.Name" />
    </telerik:RadGridView.GroupDescriptors>
    <telerik:RadGridView.Columns>
        <telerik:GridViewColumn>
            <telerik:GridViewColumn.CellTemplate>
                <DataTemplate>
                    <Grid Margin="2">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="2" />
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="2" />
                            <ColumnDefinition Width="Auto" />
                        </Grid.ColumnDefinitions>

                        <Button Command="{Binding DataContext.EditTemplateCommand, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType=telerik:RadGridView}}" CommandParameter="{Binding}">
                            <Image Width="16"
                                   Height="16"
                                   Source="/Common;component/Images/Icons/edit.png"
                                   Stretch="Fill" />
                        </Button>

                        <Button Grid.Column="2"
                                Command="{Binding DataContext.CopyTemplateCommand, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType=telerik:RadGridView}}"
                                CommandParameter="{Binding}">
                            <Image Width="16"
                                   Height="16"
                                   Source="/Common;component/Images/Icons/copy.png"
                                   Stretch="Uniform" />
                        </Button>

                        <Button Grid.Column="4"
                                Command="{Binding DataContext.RemoveTemplateCommand, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType=telerik:RadGridView}}"
                                CommandParameter="{Binding}">
                            <Image Width="16"
                                   Height="16"
                                   Source="/Common;component/Images/Icons/trash.png"
                                   Stretch="Fill" />
                        </Button>

                    </Grid>
                </DataTemplate>
            </telerik:GridViewColumn.CellTemplate>
        </telerik:GridViewColumn>
        <telerik:GridViewDataColumn Width="*"
                                    DataMemberBinding="{Binding Title}"
                                    Header="{Binding Title, Source={StaticResource Strings}}" />
    </telerik:RadGridView.Columns>
</telerik:RadGridView>

The entity looks like this:

public class DocumentTemplate
{
    [Key]
    public int Id { get; set; }

    [StringLength(50)]
    [RegularExpression(@"^[^\\~#%&*{}/:<>?|\" + "\"" + "-]+$", ErrorMessageResourceType = typeof(ValidationStrings), ErrorMessageResourceName = "TemplateTitleInvalid")]
    public string Title { get; set; }

    [StringLength(100)]
    public string FileName { get; set; }

    public string Xaml { get; set; }

    [Include, Association("DocumentTemplate_DataSources", "Id", "TemplateId")]
    public ICollection<DocumentDataSource> DataSources { get; set; }

    [Include, Association("DocumentTemplate_Category", "CategoryId", "Id")]
    public DocumentTemplateCategory Category { get; set; }
    public int CategoryId { get; set; }

    public DocumentTemplate()
    {
        DataSources = new HashSet<DocumentDataSource>();
    }
}

The entity is transmitted to the Silverlight client with RIA Services. I  tested the regular expression in a console application and it works there. When I replace the regex with ".*" it works. How can I fix this? I really need regex validation on that property.

Lukas

[Lukas]

I'm sorry, I just notice that I forgot to say what goes wrong: I'm getting an exception when loading the view:


Type: FormatException
Message: Input string was not in a correct format.

Stacktrace:

   at System.Text.StringBuilder.AppendFormat(IFormatProvider provider, String format, Object[] args)
   at System.String.Format(IFormatProvider provider, String format, Object[] args)
   at System.ComponentModel.DataAnnotations.RegularExpressionAttribute.FormatErrorMessage(String name)
   at System.ComponentModel.DataAnnotations.ValidationAttribute.IsValid(Object value, ValidationContext validationContext)
   at System.ComponentModel.DataAnnotations.ValidationAttribute.GetValidationResult(Object value, ValidationContext validationContext)
   at System.ComponentModel.DataAnnotations.Validator.TryValidate(Object value, ValidationContext validationContext, ValidationAttribute attribute, ValidationError& validationError)
   at System.ComponentModel.DataAnnotations.Validator.GetValidationErrors(Object value, ValidationContext validationContext, IEnumerable`1 attributes, Boolean breakOnFirstError)
   at System.ComponentModel.DataAnnotations.Validator.GetObjectPropertyValidationErrors(Object instance, ValidationContext validationContext, Boolean validateAllProperties, Boolean breakOnFirstError)
   at System.ComponentModel.DataAnnotations.Validator.GetObjectValidationErrors(Object instance, ValidationContext validationContext, Boolean validateAllProperties, Boolean breakOnFirstError)
   at System.ComponentModel.DataAnnotations.Validator.TryValidateObject(Object instance, ValidationContext validationContext, ICollection`1 validationResults, Boolean validateAllProperties)
   at Telerik.Windows.Data.SafeValidator.TryValidateObject(Object instance, ValidationContext validationContext, ICollection`1 validationResults, Boolean validateAllProperties)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.<PerformDataAnnotationValidationForItem>d__71.MoveNext()
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection)
   at System.Collections.Generic.List`1.AddRange(IEnumerable`1 collection)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.GetAllDataErrorsForItem(Object dataItem)
   at Telerik.Windows.Controls.GridView.GridViewRow.GetErrors(Object item, GridViewDataControl owningDataGrid)
   at Telerik.Windows.Controls.GridView.GridViewRow.PrepareRow(Object item, GridViewDataControl owningDataGrid)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.PrepareContainerForItemOverride(DependencyObject element, Object item)
   at Telerik.Windows.Controls.GridView.BaseItemsControl.Telerik.Windows.Controls.GridView.IGeneratorHost.PrepareItemContainer(DependencyObject container, Object item)
   at Telerik.Windows.Controls.GridView.GridViewItemContainerGenerator.System.Windows.Controls.Primitives.IItemContainerGenerator.PrepareItemContainer(DependencyObject container)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.NestedLayoutStrategy.InsertContainer(Int32 childIndex, UIElement container, Boolean isRecycled)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.NestedLayoutStrategy.InsertNewContainer(Int32 childIndex, UIElement container)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.NestedLayoutStrategy.AddContainerFromGenerator(Int32 childIndex, UIElement child, Boolean newlyRealized)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.NestedLayoutStrategy.GenerateNextChild(IItemContainerGenerator generator, Int32 childIndex)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.NestedLayoutStrategy.MeasureOverride(Size constraint)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)

[Yoan]

Hello Lukas,

I have already answered to your support ticket. In order to make our communication consistent, it would be better to continue our communication regarding this issue there.

Regards,
Yoan
Telerik