private void CopyPresentationProperties(Presentation fromPresentation, Presentation toPresentation)
{
if(fromPresentation == null)
{
throw new ArgumentNullException("fromPresentation");
}
if(toPresentation == null)
{
throw new ArgumentNullException("toPresentation");
}
toPresentation.CreateDate = fromPresentation.CreateDate;
toPresentation.Description = fromPresentation.Description;
toPresentation.Name = fromPresentation.Name;
toPresentation.SlidesJSON = fromPresentation.SlidesJSON;
toPresentation.Tags = fromPresentation.Tags;
}
public void DeletePresentation(Presentation presentation)
{
if(presentation == null)
{
throw new ArgumentNullException("presentation");
}
var existPresentation =
dbContext.Presentations.FirstOrDefault(x => x.PresentationId == presentation.PresentationId);
if(existPresentation == null)
{
throw new InvalidDataException("this presentation doesn't exist in current data base");
}
dbContext.Presentations.Remove(existPresentation);
}
public void UpdatePresentation(Presentation presentation)
{
if(presentation == null)
{
throw new ArgumentNullException("presentation");
}
var existPresentation =
dbContext.Presentations.FirstOrDefault(x => x.PresentationId == presentation.PresentationId);
if(existPresentation == null)
{
throw new InvalidDataException("This presentation doesn't exist in the current data base");
}
if (presentation != existPresentation)
{
CopyPresentationProperties(presentation, existPresentation);
}
dbContext.Entry(existPresentation).State = EntityState.Modified;
}
public void CreatePresentation(Presentation presentation)
{
if(presentation == null)
{
throw new ArgumentNullException("presentation");
}
dbContext.Presentations.Add(presentation);
}
