Displaying Data Validation Messages in WPF

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Displaying Data Validation Messages in WPF

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re: Displaying Data Validation Messages in WPF

Cesar H. Parrales — Sat, 12 Jul 2008 17:20:14 GMT

It would be great to see how manage the warning before an event occurs. For example: Before a user delete a record, bring up a confirmation message. The same for modifications and so on.

WPF Forms over Data: 2 More Videos!

Beth Massi - Sharing the goodness that is VB — Fri, 25 Jul 2008 04:47:29 GMT

I couldn't wait for the content pages to prop onto MSDN to tell you that I just uploaded two more WPF

re: Displaying Data Validation Messages in WPF

Mahesh — Tue, 29 Jul 2008 18:46:01 GMT

Why are you not using WCF and/or Entity Framework(EF) in these videos?

re: Displaying Data Validation Messages in WPF

Beth Massi — Tue, 29 Jul 2008 20:05:40 GMT

Hi Mahesh,

The point is to teach WPF data binding. WCF doesn't change how you bind a form to a data source, it just changes how the data gets to the form. WRT the Entity Framework, I rather have these videos work with released product. At this time Entity Framework is in Beta. However, I do plan on doing a couple videos on EF after SP1 is released (soon). ;-)

HTH,

-B

re: Displaying Data Validation Messages in WPF

Steve Watts — Fri, 29 Aug 2008 20:03:45 GMT

Good article. Wish I'd seen this before I bumbled through my Validation exercise. But...

I'm doing something very similar with the ToolTip and have found that if you have a ToolTip regularly assigned to the control, that the code in the Style Trigger will not override it.

Have you found that to be true?

Data validation - Silverlight versus WPF part 2

The Problem Solver — Tue, 30 Dec 2008 19:04:59 GMT

In a previous blog post I pointed out that quite a difference between data validation between Silverlight

re: Displaying Data Validation Messages in WPF

Scott — Wed, 21 Jan 2009 19:52:49 GMT

Beth - I know this is an old entry, but I'm hoping you're still notified of comments.

I have a WPF app with a TextBox bound to a field in a typed DataTable. The field is a Decimal, and the ColumnChanged event fires fine as long as the user enters a decimal value. It doesn't fire if they enter text.

Do you know of any reason why this would be? Is the WPF binding preventing the value from being sent to the binding source because the type doesn't match? How can I notify the user of bad input?

Thanks in advance.

P.S. - I really enjoy your videos. You have a great teaching sense.

re: Displaying Data Validation Messages in WPF

Beth Massi — Wed, 21 Jan 2009 20:29:00 GMT

Hi Scott,

You'll probably want to add a ValueConverter to do this. Take a look at this post on how to do that: http://blogs.msdn.com/bethmassi/archive/2008/12/12/formatting-data-in-wpf-controls.aspx

There's also a video here with sample code: http://msdn.microsoft.com/en-us/vbasic/dd367843.aspx

HTH,

-B

ADO.NET Data Services - Intercepting Queries and Adding Validation

Beth Massi - Sharing the goodness that is VB — Thu, 22 Jan 2009 07:54:45 GMT

Last few posts I've been building a WPF client against ADO.NET Data Services, if you missed them: Using

ADO.NET Data Services - Intercepting Queries and Adding Validation

VB Feeds — Thu, 22 Jan 2009 12:01:28 GMT

Last few posts I've been building a WPF client against ADO.NET Data Services, if you missed them

re: Displaying Data Validation Messages in WPF

Roy — Tue, 10 Feb 2009 20:55:20 GMT

Beth,

Thanks for the article. I have a question. In the last style (which is the display I too prefer), what is the Loaded event refering to. (What is being loaded?)

Also a note to Steve's comment of 08/29/09, yes I too have found that to be true. I moved my error message to a ToolTip that displays from the red flashing icon.

Thanks

re: Displaying Data Validation Messages in WPF

Beth Massi — Tue, 10 Feb 2009 21:06:00 GMT

Hi Roy,

When the Elipse and the Textblock (which comprises the "error icon") is loaded then I want to run the storyboard which makes them flash.

HTH,

-B

re: Displaying Data Validation Messages in WPF

Roy — Wed, 11 Feb 2009 03:34:23 GMT

Beth,

Thanks for the response.

I guess the better question might have been what causes them to get loaded. In other words, why do they load only if there is an error in the error collection?

Thanks

re: Displaying Data Validation Messages in WPF

Doug — Thu, 19 Feb 2009 20:42:30 GMT

Beth,

Quick question on new entries. If the user clicks save before any data is entered the OnValidate event within the biz layer will throw an error. How do the WPF controls get notified of the errors since no propertychanged event was fired? I am stuck at this point and would like to show the red border, etc. on each invalid field when this occurs.

Thanks,

Doug

re: Displaying Data Validation Messages in WPF

Abel — Sun, 07 Jun 2009 00:47:16 GMT

how can return exactly at cell with error after an n validations rule´s violation??? .

I blink errorprovider in cell with error but I jump to another cell.

can yoy helpme.

re: Displaying Data Validation Messages in WPF

Sharf — Wed, 29 Jul 2009 21:12:08 GMT

Is there way column allow only numeric? How can I do that? For ex, If I type letters in bounded textbox it should not allow. I can did this in textbox validation but I need in Dataset partial class. Can you help me please?

re: Displaying Data Validation Messages in WPF

Beth Massi — Wed, 29 Jul 2009 21:52:56 GMT

Hi Doug,

You should be able to raise the property changed events from your OnValidate partial methods.

HTH,

-B

re: Displaying Data Validation Messages in WPF

Beth Massi — Wed, 29 Jul 2009 21:53:26 GMT

Hi Sharf,

Read this post on how to format data in controls:

http://blogs.msdn.com/bethmassi/archive/2008/12/12/formatting-data-in-wpf-controls.aspx

HTH,

-B

re: Displaying Data Validation Messages in WPF

Sharf — Thu, 30 Jul 2009 08:40:34 GMT

Thanks for your reply. I need this in Winforms. And also the column allow only numeric values and once the user enter "." after that it should allow only 2 decimal places. Can you please?

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

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 — 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