Set a ValidationError by Code
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.
Set the validation error
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);
Clear the validation error
Validation.ClearInvalid(textBox.GetBindingExpression(TextBox.TextProperty));
Last modified: 2008-12-04 13:14:24
Copyright (c) by Christian Moser, 2011.
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