public void Show()
{
Console.WriteLine("Example 7\n\n");
Console.WriteLine("Example shows \"QueryMultiple\" method to select multiple data from db:\n\n");
try
{
_initializationRepository.Initialize();
Console.WriteLine("QueryMultiple method execution, press any key to begin:");
Console.ReadKey();
Console.WriteLine("\nQueryMultiple anonymous object after connecting two objects from query result:");
try
{
var multiple = _repository.GetEmployeeAndItsAddress();
ConsoleExtension.WriteObject(multiple);
}
catch (Exception exception)
{
Console.WriteLine($"nQueryMultiple method has thrown an exception: \n\n{exception.Message}");
}
}
catch (Exception exception)
{
Console.WriteLine(ConnectionStore.ConnectionErrorProvider(exception.Message));
}
GetBackChooser.GetBack();
}
public void Show()
{
Console.WriteLine("Example 4\n\n");
Console.WriteLine("Example shows \"QueryFirstOrDefault\" method to select data from Employee Table:\n\n");
try
{
Console.WriteLine("First, answer the question\n");
bool result = false;;
do
{
Console.WriteLine("The question is: What will happen in case if we use QueryFirsOrDefault method on more than 1 records?");
Console.WriteLine("Press 1 if it will return null, press 2 if it will return default value of queried type and press 3 if it will return first of found records");
var dapperQuestionAnswer = Console.ReadKey().KeyChar;
result = new QuestionAnswerHandler(EQuestionType.QueryFirstOrDefaultQuestion)
.HandleAnswer(dapperQuestionAnswer);
Console.WriteLine();
}while (!result);
_initializationRepository.Initialize();
Console.WriteLine("QueryFirstOrDefault method execution, press any key to begin:");
Console.ReadKey();
Console.WriteLine("\nFirst or default object if found more than 1 records:");
var firstOrDefaultEmployee = _repository.GetFirstOrDefaultEmployee();
ConsoleExtension.WriteDynamicObject(firstOrDefaultEmployee);
Console.WriteLine("\nSecond case, press any key to proceed:");
Console.ReadKey();
Console.WriteLine("\n");
Console.WriteLine("Clearing db table");
_repository.ClearAllEmployeeData();
Console.WriteLine("Db table cleared");
Console.WriteLine("\nFirst or default object if no records found:");
var firstOrDefaultEmployeeIfEmpty = _repository.GetFirstOrDefaultEmployee();
ConsoleExtension.WriteDynamicObject(firstOrDefaultEmployeeIfEmpty);
Console.WriteLine("Reinitializing db tables");
_initializationRepository.Initialize();
Console.WriteLine("Db tables reinitialized");
}
catch (Exception exception)
{
Console.WriteLine(ConnectionStore.ConnectionErrorProvider(exception.Message));
}
GetBackChooser.GetBack();
}
public void Show()
{
Console.WriteLine("Example 3\n\n");
Console.WriteLine("Example shows \"QueryFirst\" method to select data from Employee table:\n\n");
try
{
Console.WriteLine("QueryFirst method execution, press any key to begin:");
Console.ReadKey();
Console.WriteLine();
Console.WriteLine("I'm working, please be patient...\n");
_repository.PopulateEmployeeWithFakeData();
var watchDapper = new Stopwatch();
watchDapper.Start();
var dapperMethod = _repository.GetFirstEmployee();
watchDapper.Stop();
var watchLinq = new Stopwatch();
watchLinq.Start();
var linqMethod = _repository.GetFirstEmployeeFiltered();
watchLinq.Stop();
ConsoleExtension.WriteObject(dapperMethod);
Console.WriteLine($"\nElapsed time: {watchDapper.ElapsedMilliseconds}\n");
ConsoleExtension.WriteObject(linqMethod);
Console.WriteLine($"\nElapsed time: {watchLinq.ElapsedMilliseconds}\n");
bool result = false;;
do
{
Console.WriteLine("The question is: Which of two queries above was a Dapper query?");
Console.WriteLine("Press 1 for the first and 2 for the second answer:");
var dapperQuestionAnswer = Console.ReadKey().KeyChar;
result = new QuestionAnswerHandler(EQuestionType.QueryFirstQuestion)
.HandleAnswer(dapperQuestionAnswer);
Console.WriteLine();
}while (!result);
Console.WriteLine("\n");
Console.WriteLine("Clearing db table");
_repository.ClearAllEmployeeData();
Console.WriteLine("Db table cleared");
Console.WriteLine("Reinitializing db tables");
_initializationRepository.Initialize();
Console.WriteLine("Db tables reinitialized");
}
catch (Exception exception)
{
Console.WriteLine(ConnectionStore.ConnectionErrorProvider(exception.Message));
}
GetBackChooser.GetBack();
}
public void InitializeDapperWorkshops() => _repository.Initialize();
public void Show()
{
Console.WriteLine("Example 6\n\n");
Console.WriteLine("Example shows \"QuerySingleOrDefault\" method to select data from Address table:\n\n");
try
{
Console.WriteLine("First, answer the question\n");
bool result = false;;
do
{
Console.WriteLine("The question is: What will happen in case if we use QuerySingleOrDefault method on more than 1 records?");
Console.WriteLine("Press 1 if it will return null, press 2 if it will return an exception and press 3 if it will return any single of found records");
var dapperQuestionAnswer = Console.ReadKey().KeyChar;
result = new QuestionAnswerHandler(EQuestionType.QuerySingleOrDefaultQuestion)
.HandleAnswer(dapperQuestionAnswer);
Console.WriteLine();
}while (!result);
_initializationRepository.Initialize();
Console.WriteLine("QuerySingleOrDefault method execution, press any key to begin:");
Console.ReadKey();
Console.WriteLine("\nSingleOrDefault object if found more than 1 records:");
try
{
var singleOrDefaultIfMany = _repository.GetSingleOrDefaultAddress();
ConsoleExtension.WriteObject(singleOrDefaultIfMany);
}
catch (Exception exception)
{
Console.WriteLine($"QuerySingleOrDefault method has thrown an exception: \n\n{exception.Message}");
}
Console.WriteLine("\nSecond case, press any key to proceed:");
Console.ReadKey();
Console.WriteLine("\n");
Console.WriteLine("Clearing db table");
_repository.ClearAllAddressData();
Console.WriteLine("Db table cleared");
_repository.AddSingleFakeAddress();
Console.WriteLine("Added single fake address to Address table");
Console.WriteLine("\nSingleOrDefault object if single record found:");
try
{
var singleOrDefault = _repository.GetSingleOrDefaultAddress();
ConsoleExtension.WriteObject(singleOrDefault);
}
catch (Exception exception)
{
Console.WriteLine($"QuerySingleOrDefault method has thrown an exception: \n\n{exception.Message}");
}
Console.WriteLine("\nThird case, press any key to proceed:");
Console.ReadKey();
Console.WriteLine("\n");
Console.WriteLine("Clearing db table");
_repository.ClearAllAddressData();
Console.WriteLine("Db table cleared");
Console.WriteLine("\nSingleOrDefault object if no records found:");
try
{
var singleOrDefaultIfEmpty = _repository.GetSingleOrDefaultAddress();
ConsoleExtension.WriteObject(singleOrDefaultIfEmpty);
}
catch (Exception exception)
{
Console.WriteLine($"QuerySingleOrDefault method has thrown an exception: \n\n{exception.Message}");
}
Console.WriteLine("\n\nReinitializing db tables");
_initializationRepository.Initialize();
Console.WriteLine("Db tables reinitialized");
}
catch (Exception exception)
{
Console.WriteLine(ConnectionStore.ConnectionErrorProvider(exception.Message));
}
GetBackChooser.GetBack();
}