A ValidatioRule in a BindingExpression only triggers, when the target side of the binding changes. If you want to set a validation error by code you can use the following snippet.
ValidationError validationError =
new ValidationError(regexValidationRule,
textBox.GetBindingExpression(TextBox.TextProperty));
validationError.ErrorContent = "This is not a valid e-mail address";
Validation.MarkInvalid(
textBox.GetBindingExpression(TextBox.TextProperty),
validationError);
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Christian | |
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Commented on 3.March 2009 |
Don't have much help for a beginner like me.
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Alexandra | |
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Commented on 19.March 2009 |
Great tip, this helped me a lot! Keep 'em coming!
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Yuri | |
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Commented on 19.April 2009 |
What is it - regexValidationRule?
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Gergely... | |
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Commented on 12.November 2009 |
Regular Expression ... Google.com :)
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balwat singh | |
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Commented on 21.April 2010 |
who to use validation inside WPF.
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ashish | |
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Commented on 3.August 2010 |
wha the fuck is this ?
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hi | |
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Commented on 7.August 2010 |
chethi venna mudda chengal malthadu
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yy | |
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Commented on 1.November 2010 |
superb
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xr280xr | |
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Commented on 22.November 2010 |
Thank you! I searched for almost an hour trying to remember the name of this method. I can't believe it is not more frequently used or referenced. When taking this approach, you obviously know that some validation has failed, so what is the significance of the ValidationRule passed to the ValidationError? What is it used for?
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pundarik | |
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Commented on 25.January 2011 |
it's really help less for beginner dear....!
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Max | |
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Commented on 8.February 2011 |
Very helpful!
Please keep writing such posts :)
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ste | |
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Commented on 8.February 2011 |
this example is orrible!
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kashif | |
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Commented on 8.March 2011 |
it help less for me as m begneer...is there any way to validate in xaml
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domondaemon | |
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Commented on 10.March 2011 |
what an example ya i dont expect this example from you its disappointing
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BalaMurugan | |
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Commented on 12.April 2011 |
yeaha Superu supero Super aapu....
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Anju | |
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Commented on 24.June 2011 |
Thanks Christian.How would you do the same validation in MVVM? Any idea?
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Anju | |
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Commented on 24.June 2011 |
How to do the same validation in MVVM? to check if the textbox is not empty and if the text entered in txtbx is of the proper reg expression. Thanks...
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aaaa | |
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Commented on 1.July 2011 |
really very nice......
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shaily | |
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Commented on 9.July 2011 |
thank you,but for messege display what to do?
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Unknown | |
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Commented on 10.August 2011 |
I don't understand it. but it will be superb.
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Beauty | |
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Commented on 13.September 2011 |
I had problems to find out what's the "regexValidationRule". Then I found a more detailed page with example. LOOK HERE: . . . . . .
http://www.wpftutorial.net/DataValidation.html
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