/// <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);
}
private EditSession(Entity entity)
{
this._entity = entity;
this._lastState = entity.EntityState;
this._customMethodInvocation = entity.CustomMethodInvocation;
this._validationErrors = entity.ValidationErrors.ToArray();
this._modifiedProperties = new List<string>();
}
/// <summary>
/// Invokes the virtual OnActionStateChanged method as required.
/// </summary>
/// <param name="prevCustomMethodInvocation">The previous custom method
/// invocation.</param>
private void UpdateActionState(EntityAction prevCustomMethodInvocation)
{
if (this._lastCanInvoke == this.CanInvokeAction(null))
{ // if the action state hasn't changed, nothing to do
return;
}
// save off any previous invocation
this._prevCustomMethodInvocation = prevCustomMethodInvocation;
this.OnActionStateChanged();
this._prevCustomMethodInvocation = null;
}