public static List <AuditEntry> UseAudit(int nbRecords, StringBuilder sb)
{
using (var ctx = new CodeFirstEntities())
{
DbHelper.SetDemoEntities(ctx, sb, nbRecords);
var auditEntries = new List <AuditEntry>();
ctx.BulkSaveChanges(operation =>
{
operation.UseAudit = true;
// Multiple bulk operations can be executed in a BulkSaveChanges event, the BulkOperationExecuted action
// will be invoked after each bulk operations.
//
// Audit entries contain information about:
// - Table
// - Operation
// - Date
// - Old Column Value
// - New Column Value
operation.BulkOperationExecuted += bulkOperation => auditEntries.AddRange(bulkOperation.AuditEntries);
});
return(auditEntries);
}
}
public static List <AuditEntry> UseLogDump(int nbRecords, StringBuilder sb)
{
using (var ctx = new CodeFirstEntities())
{
DbHelper.SetDemoEntities(ctx, sb, nbRecords);
var auditEntries = new List <AuditEntry>();
ctx.BulkSaveChanges(operation =>
{
operation.UseLogDump = true;
// Multiple bulk operations can be executed in a BulkSaveChanges event, the BulkOperationExecuted action
// will be invoked after each bulk operations.
//
// The log dump contains all database events.
// - A connection is opened
// - A command is executed
// - A SqlBulkCopy is executed
operation.BulkOperationExecuted += bulkOperation => sb.AppendLine(bulkOperation.LogDump.ToString());
});
return(auditEntries);
}
}
public static void BulkSaveChanges2(int nbRecords, Stopwatch clock, StringBuilder sb)
{
BulkOperationManager.BulkOperationBuilder = operation => operation.BatchSize = 1000;
using (var ctx = new CodeFirstEntities())
{
// Do any kind of change to your context!
ctx.EntitySimples.ToList().ForEach(x => x.ColumnInt = x.ColumnInt + 1);
// ctx.SaveChanges();
ctx.BulkSaveChanges(operation => operation.BatchSize = 50); // Save 50x faster using BulkSaveChanges
}
}
public static void Log(int nbRecords, StringBuilder sb)
{
using (var ctx = new CodeFirstEntities())
{
DbHelper.SetDemoEntities(ctx, sb, nbRecords);
// The log event is invoked every time a database event occurs.
// - A connection is opened
// - A command is executed
// - A SqlBulkCopy is executed
ctx.BulkSaveChanges(operation => { operation.Log += s => sb.AppendLine(s); });
}
}
public static void RetryInterval(int nbRecords, StringBuilder sb)
{
using (var ctx = new CodeFirstEntities())
{
DbHelper.SetDemoEntities(ctx, sb, nbRecords);
ctx.BulkSaveChanges(operation =>
{
operation.RetryCount = 3;
// RetryInterval property allows to wait X ms before retrying the operation when a transient error occurs.
// Transient error: https://msdn.microsoft.com/en-us/library/4cff491e-9359-4454-bd7c-fb72c4c452ca#bkmk_connection_errors
operation.RetryInterval = new TimeSpan(0, 0, 1);
});
}
}
public static void BulkSaveChanges(int nbRecords, Stopwatch clock, StringBuilder sb)
{
using (var ctx = new CodeFirstEntities())
{
List <EntitySimple> list = ctx.EntitySimples.Take(nbRecords / 2).ToList();
int recordToUpdate = list.Count / 2;
int recordToDelete = list.Count - recordToUpdate;
int recordToInsert = nbRecords - recordToUpdate - recordToDelete;
// Insert
{
var listToInsert = new List <EntitySimple>();
for (int i = 0; i < recordToInsert; i++)
{
listToInsert.Add(new EntitySimple {
ColumnInt = i % 5
});
}
ctx.EntitySimples.AddRange(listToInsert);
}
// Update
{
List <EntitySimple> listToUpdate = list.Take(recordToUpdate).ToList();
listToUpdate.ForEach(x => x.ColumnInt = x.ColumnInt + 1);
}
// Delete
{
List <EntitySimple> listToDelete = list.Skip(recordToUpdate).ToList();
ctx.EntitySimples.RemoveRange(listToDelete);
}
sb.Append(string.Format("INSERT {0} / UPDATE {1} / DELETE {2} entities", recordToInsert, recordToUpdate, recordToDelete));
clock.Start();
ctx.BulkSaveChanges();
clock.Stop();
}
}