/// <summary>
/// Generic save|update
/// </summary>
/// <typeparam name="T">Tipo de entidad</typeparam>
/// <param name="entitySave">objeto a guardar</param>
/// <param name="enumMode">
/// Add. Agrega
/// Edit. Actualiza
/// Delete. Elimina
/// </param>
/// <returns>0. No se guardó | 1. Se guardó | -1 Existe un registro con el mismo ID</returns>
/// <history>
/// [emoguel] created 25/04/2016
/// </history>
public async static Task <int> OperationEntity <T>(T entitySave, EnumMode enumMode) where T : class
{
int nRes = 0;
nRes = await Task.Run(() =>
{
using (var dbContext = new IMEntities(ConnectionHelper.ConnectionString()))
{
switch (enumMode)
{
#region Delete
case EnumMode.Delete:
{
dbContext.Entry(entitySave).State = EntityState.Deleted;
break;
}
#endregion
#region Edit
case EnumMode.Edit:
{
dbContext.Entry(entitySave).State = EntityState.Modified;
break;
}
#endregion
#region Add
case EnumMode.Add:
{
var objContext = ((IObjectContextAdapter)dbContext).ObjectContext;
var objSet = objContext.CreateObjectSet <T>();
#region Buscar si tiene Llave identity
bool blIdentity = false;
foreach (EdmProperty edm in objSet.EntitySet.ElementType.KeyMembers)
{
var a = edm.MetadataProperties.Where(item => item.Name == "http://schemas.microsoft.com/ado/2009/02/edm/annotation:StoreGeneratedPattern").FirstOrDefault();
if (a != null)
{
if (a.Value.ToString() == "Identity")
{
blIdentity = true;
break;
}
}
}
#endregion
if (blIdentity == true)//Si es campo autoincremental
{
dbContext.Entry(entitySave).State = EntityState.Added;
}
else
{
var keyNames = objSet.EntitySet.ElementType.KeyMembers.Select(edmMember => edmMember.Name);
var keyValues = keyNames.Select(name => entitySave.GetType().GetProperty(name).GetValue(entitySave, null)).ToArray();
var exists = dbContext.Set <T>().Find(keyValues);
if (exists != null)//Validamos si existe un registro con el mismo ID
{
return(-1);
}
else//Agrega
{
dbContext.Entry(entitySave).State = EntityState.Added;
}
}
break;
}
#endregion
}
return(dbContext.SaveChanges());
}
});
return(nRes);
}