public async Task <IActionResult> Edit(int id, [Bind("Id,LakeId,Year,Value")] Evaporation surfaceFlow)
{
if (id != surfaceFlow.Id)
{
return(NotFound());
}
if (ModelState.IsValid)
{
try
{
_context.Update(surfaceFlow);
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!EvaporationExists(surfaceFlow.Id))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToAction(nameof(Index)));
}
return(View(surfaceFlow));
}
public async Task <IActionResult> Create([Bind("Id,LakeId,Year,Value")] Evaporation surfaceFlow)
{
if (ModelState.IsValid)
{
_context.Add(surfaceFlow);
await _context.SaveChangesAsync();
return(RedirectToAction(nameof(Index)));
}
return(View(surfaceFlow));
}
/// <summary>
/// Gets the average storage time for the time period. Calculated as mean volume divide by mean (sinks + outflow + evaporation)
/// </summary>
/// <param name="Start"></param>
/// <param name="End"></param>
/// <returns></returns>
public TimeSpan GetStorageTime(DateTime Start, DateTime End)
{
if (!IsEmpty)
{
if (EndTime < End || StartTime > Start)
{
throw new Exception("Cannot calculate storage time outside of the simulated period");
}
//Find the total outflow
double d = Sinks.GetSiValue(Start, End);
d += Outflow.GetSiValue(Start, End);
//Evaporation is negative
d += Evaporation.GetSiValue(Start, End);
d += GroundwaterOutflow.GetSiValue(Start, End);
return(TimeSpan.FromSeconds(StoredVolume.GetSiValue(Start, End) / d));
}
return(TimeSpan.Zero);
}