Displaying Data Validation Messages in WPF

re: Displaying Data Validation Messages in WPF

Matt P. — Mon, 10 Dec 2012 17:47:56 GMT

Thank very much, this is extremely helpful.

re: Displaying Data Validation Messages in WPF

Admin — Wed, 24 Oct 2012 05:05:40 GMT

Here also one WPF validation example with code is available

Its contain the combobox validation also

wpftutorial.co.in/.../WPFValidationPart1.aspx

re: Displaying Data Validation Messages in WPF

Beth Massi — Wed, 15 Jun 2011 15:56:52 GMT

@espinete - it's pretty old but I think this has a sample:

archive.msdn.microsoft.com/formsoverlinq

Cheers,

-Beth

re: Displaying Data Validation Messages in WPF

espinete — Mon, 13 Jun 2011 09:59:02 GMT

Where is the sample source code about it ??? thx

re: Displaying Data Validation Messages in WPF

Louis Nardozi — Wed, 19 Jan 2011 19:46:21 GMT

Hi All,

Got somewhere with this after jillions of problems displaying validation messages. Take a look at this ValidationToolTipTemplate

<Grid.RenderTransform>

</Grid.RenderTransform>

<VisualStateManager.VisualStateGroups>

<VisualStateGroup.Transitions>

<DoubleAnimation.EasingFunction>

</DoubleAnimation.EasingFunction>

</DoubleAnimation>

</Storyboard>

</VisualTransition>

</VisualStateGroup.Transitions>

</Storyboard>

</VisualState>

</Storyboard>

</VisualState>

</VisualStateGroup>

</VisualStateManager.VisualStateGroups>

<ListBox MaxHeight="450" ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollBarVisibility="Disabled"

UseLayoutRounding="True"

Foreground="White" Background="Transparent" Margin="8,4,8,4" ItemsSource="{Binding (Validation.Errors),BindsDirectlyToSource=True}" >

<ListBox.ItemTemplate>

</DataTemplate>

</ListBox.ItemTemplate>

</ListBox>

</Border>

</Grid>

</ControlTemplate>

re: Displaying Data Validation Messages in WPF

Moorzee — Fri, 16 Jul 2010 11:55:21 GMT

Hi Beth

Do you have any idea how I would have datagrid in my usercontrol set a "HasErrors" dependancy property in the same usercontrol when invalid data is entered in a datagridrow?

Thanks a lot.

Paul.

re: Displaying Data Validation Messages in WPF

Tanner — Wed, 07 Apr 2010 20:44:14 GMT

I'm trying to follow along with this article using the wpf datagrid and I am having some issues:

1. When I moved my error style to the application.xaml file I started getting

"Cannot convert the value in attribute 'ErrorTemplate' to object of type 'System.Windows.Controls.ControlTemplate'. 'System.Windows.Style' is not a valid value for property 'ErrorTemplate'. Error at object 'Microsoft.Windows.Controls.DataGridTextColumn". Any tips to track down cryptic messages like this one?

2. I am not sure how I am overriding the default ErrorTemplate? According to this article I only need to set up the style in the app.resources but not actually do a Validation.ErrorTemplate="{StaticResource myErrorTemplate}" on my control which I wish to implement this? Only setting the "ValidateOnDataError=True" will do this for me?

3. I have manually set the UpdateSourceTrigger="PropertyChanged" on my column which I am assigning the errortemplate to yet I have to tab away or hit enter to see any UI changes. In debug mode I watched my base class of items call SendPropertyChanging and SendPropertyChanged so I am not sure what I am doing wrong? I used linq-sql classes to get my dataclasses. I found another sample project from http://www.thejoyofcode.com/Reason_10._Validation.aspx and it validates as soon as I stop typing or empty the textbox. How can I get that functionality? (Again, I am using datagrid not a textbox)

I'm almost all squared away for a nice grid with in-place edits and validation if I can just get the validation to work.

re: Displaying Data Validation Messages in WPF

Beth Massi — Fri, 31 Jul 2009 19:23:00 GMT

Hi Sharf,

Take a look at this video series, especially # 9 on how to add validation on datasets to Windows forms.

http://msdn.microsoft.com/en-us/vbasic/bb466226.aspx#formsoverdata

The datagridview will automatically display the error when you tab off the field. If you have more questions please visit the forums:

http://social.msdn.microsoft.com/Forums/en-US/category/visualbasic

re: Displaying Data Validation Messages in WPF

Sharf — Thu, 30 Jul 2009 21:30:01 GMT

Hmm...! That is not exactly what I mean. Actually, I drag & drop Dataset source with DetailsView selected to Winform. So it is already bounded textbox. I need this textbox should validate from Dataset partial class when the user keypress or anyother event. Got it?

re: Displaying Data Validation Messages in WPF

Beth Massi — Thu, 30 Jul 2009 19:28:15 GMT

Hi Sharf,

Sorry I assumed WPF because this discussion is about Validation messages in WPF. Take a look at this article in the MSDN library:

http://msdn.microsoft.com/en-us/library/aa480734.aspx

HTH,

-B