if简写

Question

如果有更简洁的方式来编写这种类型的语句：

if (!string.IsNullOrEmpty(c1))
{
    var _individual = new Individual { Age = Convert.ToInt32(c1) };
    request.Individuals.Add(_individual);
}

if (!string.IsNullOrEmpty(c2))
{
    var _individual = new Individual { Age = Convert.ToInt32(c2) };
    request.Individuals.Add(_individual);
}

if (!string.IsNullOrEmpty(c3))
{
    var _individual = new Individual { Age = Convert.ToInt32(c3) };
    request.Individuals.Add(_individual);
}

if (!string.IsNullOrEmpty(c4))
{
    var _individual = new Individual { Age = Convert.ToInt32(c4) };
    request.Individuals.Add(_individual);
}

if (!string.IsNullOrEmpty(c5))
{
    var _individual = new Individual { Age = Convert.ToInt32(c5) };
    request.Individuals.Add(_individual);
}

Answer 1

当然！ 编写一个方法：

private void AddIfAgeValid(string age) 
{    
    if (!string.IsNullOrEmpty(age))
    {
        var _individual = new Individual { Age = Convert.ToInt32(age) };
        request.Individuals.Add(_individual);
    }
}

然后只需调用它：

AddIfAgeValid(c1);
AddIfAgeValid(c2);
AddIfAgeValid(c3);
// ..

您可能还必须传递request ，不确定在哪里声明它。

您可能还想研究使用数组或List<string>来存储年龄，而不是使用c1, c2, c3, ..变量。

Answer 2

foreach (var c in new[] {c1, c2, c3, c4, c5})
{
  if (!string.IsNullOrEmpty(c))
  {
    var _individual = new Individual { Age = Convert.ToInt32(c) };
    request.Individuals.Add(_individual);
  }
}

Answer 3

foreach (var x in (new[] { c1, c2, c3, c4, c5 }).Where(x => !string.IsNullOrEmpty(x)))
    request.Individuals.Add(new Individual { Age = Convert.ToInt32(x) });

如果只有Individuals支持AddRange ，则为AddRange ：

request.Individuals.AddRange((new[] { c1, c2, c3, c4, c5 }).Where(x => !string.IsNullOrEmpty(x)).Select(x => new Individual { Age = Convert.ToInt32(x) }));

但是我不会走那么远。 它比foreach可读性。