How to catch multiple validations with DataAnnotations MVVM?

Question

I have a property I'm validating that has two dataAnnotations. I want to catch all the validation exceptions at once.
private string streetAddress1;
[Required(ErrorMessage = "test error")]
[StringLength(50, MinimumLength = 5)]
public string StreetAddress1
get { return streetAddress1; }
set
ValidationInterceptor(value);
streetAddress1 = value;
RaisePropertyChanged("StreetAddress1");
I can currently catch one at a time like so
public void ValidationInterceptor(object value, [CallerMemberName] string propertyName = "")
try
Validator.ValidateProperty(value, new ValidationContext(this, null, null) { MemberName = propertyName });
catch (ValidationException e)
ValidationResult result = e.ValidationResult;
Thanks

Answer 1

Check out my sample
https://gallery.technet.microsoft.com/WPF-Entity-Framework-MVVM-78cdc204
That extracts all errors to a collection the view can use...
This bit does one property
public void ValidateProperty(string propertyName)
// If validating a property then there can be no conversion error
errors.Remove(propertyName);
var vContext = new ValidationContext(this, null, null);
vContext.MemberName = propertyName;
List<ValidationResult> vResults = new List<ValidationResult>();
Validator.TryValidateProperty(this.GetType().GetProperty(propertyName).GetValue(this, null), vContext, vResults);
TransformErrors(vResults);
FlattenErrorList();
NotifyErrorsChanged(propertyName);
private void TransformErrors(List<ValidationResult> results)
foreach (ValidationResult r in results)
foreach (string ppty in r.MemberNames)
AddError(ppty, r.ErrorMessage, ErrorSource.Validation);
Hope that helps.
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