private static void UpdateUsingSqlCommand()
{
using (SamuriDbContext context = new SamuriDbContext())
{
int count = context.Database.ExecuteSqlCommand("Update Samuris set Name=REPLACE(Name, 'San', 'Nan')");
Console.WriteLine($"count = {count}");
}
}
private static void QuerySamuris()
{
using (SamuriDbContext context = new SamuriDbContext())
{
List <Samuri> samuris = context.Samuris.Where(s => s.Name.StartsWith("P")).ToList();
foreach (var samuri in samuris)
{
Console.WriteLine(samuri.Name);
}
}
}
private static void InsertSamuris()
{
Samuri samuri = new Samuri {
Name = "Frank"
};
using (SamuriDbContext context = new SamuriDbContext())
{
context.Samuris.Add(samuri);
context.SaveChanges();
}
}
private static void RetrieveAndUpdateMultipleSamuri()
{
using (SamuriDbContext context = new SamuriDbContext())
{
List <Samuri> samuris = context.Samuris.ToList();
if (samuris.Count > 0)
{
samuris.ForEach(s => s.Name += "San");
context.SaveChanges();
}
}
}
private static void RetrieveAndUpdateSamuri()
{
using (SamuriDbContext context = new SamuriDbContext())
{
Samuri samuri = context.Samuris.FirstOrDefault();
if (samuri == null)
{
return;
}
samuri.Name += "San";
context.SaveChanges();
}
}
private static void QueryUsingRawSql()
{
using (SamuriDbContext context = new SamuriDbContext())
{
List <Samuri> samuris = context.Samuris.FromSql("Select * from Samuris").ToList();
if (samuris.Count <= 0)
{
return;
}
foreach (var samuri in samuris)
{
Console.WriteLine(samuri.Name);
}
}
}
private static void InsertMultipleSamuris()
{
Samuri samuri1 = new Samuri {
Name = "Peter"
};
Samuri samuri2 = new Samuri {
Name = "Paul"
};
List <Samuri> samuriList = new List <Samuri> {
samuri1, samuri2
};
using (SamuriDbContext context = new SamuriDbContext())
{
context.Samuris.AddRange(samuriList);
context.SaveChanges();
}
}
