private static DbPropertyValues MergeValues(DbPropertyValues original, DbPropertyValues current, DbPropertyValues database)
{
var result = original.Clone();
foreach (var propertyName in original.PropertyNames)
{
if (original[propertyName] is DbPropertyValues)
{
var mergedComplexValues = MergeValues(
(DbPropertyValues)original[propertyName],
(DbPropertyValues)current[propertyName],
(DbPropertyValues)database[propertyName]);
((DbPropertyValues)result[propertyName])
.SetValues(mergedComplexValues);
}
else
{
if (!object.Equals(
current[propertyName],
original[propertyName]))
{
result[propertyName] = current[propertyName];
}
else if (!object.Equals(
database[propertyName],
original[propertyName]))
{
result[propertyName] = database[propertyName];
}
}
}
return(result);
}
private async static Task UserDealWithUpdates(string user, int delay, int starts)
{
using (var data = new Formula1Entities())
{
int changes = 0;
bool saveFailed = false;
do
{
try
{
saveFailed = false;
Racer r1 = data.Racers.Where(r => r.LastName == "Alonso").First();
r1.Starts = starts;
await Task.Delay(delay);
changes = data.SaveChanges();
}
catch (DbUpdateConcurrencyException ex)
{
saveFailed = true;
Console.WriteLine("{0} error {1}", user, ex.Message);
foreach (var entry in ex.Entries)
{
DbPropertyValues currentValues = entry.CurrentValues;
DbPropertyValues databaseValues = entry.GetDatabaseValues();
DbPropertyValues resolvedValues = databaseValues.Clone();
AskUser(currentValues, databaseValues, resolvedValues);
entry.OriginalValues.SetValues(databaseValues);
entry.CurrentValues.SetValues(resolvedValues);
}
}
}while (saveFailed);
Console.WriteLine("{0} changed {1} record(s)", user, changes);
}
}
public void Non_Generic_DbPropertyValues_uses_Clone_on_InternalPropertyValues()
{
var properties = new Dictionary<string, object>
{
{ "Id", 1 }
};
var values = new DbPropertyValues(new TestInternalPropertyValues<FakeTypeWithProps>(properties));
var clone = values.Clone();
Assert.Equal(1, clone["Id"]);
}
public IDbPropertyValuesBase Clone()
{
return(_dbPropertyValues.Clone() as IDbPropertyValuesBase);
}