/// <summary>
/// Validate the changeset.
/// </summary>
/// <param name="validationContext">The ValidationContext to use.</param>
/// <returns>True if the changeset is valid, false otherwise.</returns>
internal bool Validate(ValidationContext validationContext)
{
bool success = true;
foreach (Entity entity in this)
{
entity.VerifyNotEditing();
bool entityRequiresValidation = entity.MetaType.RequiresValidation;
EntityAction customMethod = entity.EntityActions.SingleOrDefault();
if (!entityRequiresValidation && customMethod == null)
{
continue;
}
if (entity.EntityState == EntityState.Deleted)
{
// skip validation for Deleted entities here since the entity is going to be deleted anyway
continue;
}
// first validate the entity
List <ValidationResult> validationResults = new List <ValidationResult>();
if (entityRequiresValidation)
{
ValidationUtilities.TryValidateObject(entity, validationContext, validationResults);
}
// validate any Custom Method invocations
if (customMethod != null)
{
// validate the method call
object[] parameters = customMethod.HasParameters ? customMethod.Parameters.ToArray() : null;
ValidationContext customMethodValidationContext = ValidationUtilities.CreateValidationContext(entity, validationContext);
ValidationUtilities.TryValidateCustomUpdateMethodCall(customMethod.Name, customMethodValidationContext, parameters, validationResults);
}
if (validationResults.Count > 0)
{
// replace the validation errors for the entity
IEnumerable <ValidationResult> entityErrors = new ReadOnlyCollection <ValidationResult>(validationResults.Select(err => new ValidationResult(err.ErrorMessage, err.MemberNames)).Distinct(new ValidationResultEqualityComparer()).ToList());
ValidationUtilities.ApplyValidationErrors(entity, entityErrors);
success = false;
}
else
{
// clear the errors for the entity
entity.ValidationErrors.Clear();
}
}
return(success);
}
/// <summary>
/// Cancels the edit session, reverting all changes made to the
/// entity since the session began.
/// </summary>
public void Cancel()
{
// revert any data member modifications
if (this._snapshot != null)
{
ObjectStateUtility.ApplyState(this._instance, this._snapshot);
}
// Revert the validation errors and notify our parent
ValidationUtilities.ApplyValidationErrors(this._instance, this._validationErrors);
this._instance.NotifyParentMemberValidationChanged(null, this._validationErrors);
}
/// <summary>
/// Commit the edits made to this instance since the last call
/// to BeginEdit
/// </summary>
protected void EndEdit()
{
if (!this.IsEditing)
{
return;
}
// TODO : Check if this old comment is still true and if this is something we should manage
// " The desktop version of the framework doesn't currently do deep validation."
// Validate the instance itself (cross-field validation happens here)
List <ValidationResult> validationResults = new List <ValidationResult>();
ValidationUtilities.TryValidateObject(this, this.CreateValidationContext(), validationResults);
// Replace all errors for this instance and notify our parent
ValidationUtilities.ApplyValidationErrors(this, validationResults);
this.NotifyParentMemberValidationChanged(null, validationResults);
this._editSession = null;
}
/// <summary>
/// Commit the edits made to this instance since the last call
/// to BeginEdit
/// </summary>
protected void EndEdit()
{
if (!this.IsEditing)
{
return;
}
#if SILVERLIGHT
// Validate the instance itself (cross-field validation happens here)
List <ValidationResult> validationResults = new List <ValidationResult>();
ValidationUtilities.TryValidateObject(this, this.CreateValidationContext(), validationResults);
// Replace all errors for this instance and notify our parent
ValidationUtilities.ApplyValidationErrors(this, validationResults);
this.NotifyParentMemberValidationChanged(null, validationResults);
#else
// Validate the instance itself (cross-field validation happens here)
// TODO : The desktop version of the framework doesn't currently do
// deep validation.
Validator.ValidateObject(this, this.CreateValidationContext(), /*validateAllProperties*/ true);
#endif
this._editSession = null;
}