Question

我有一个叫做电影的课。 Movie具有movieYear字符串属性和movieYearInt int属性。我想要一个类方法，我可以发送电影对象并获取一个已经获取movieYear字符串属性并将其值复制到movieYearInt的对象。稍后我会转换对象的更多属性。

这是电影类

 public class movie
{
    public string movieName { get; set; }
    public string movieYear { get; set; }
    public int movieYearInt { get; set; }

    public movie convertFilm(movie m)
    {
        m.movieYearInt = int.Parse(m.movieYear);
        return m;
    }
}

这就是我想到以我的形式检索对象的想法

movie m = new movie();
m.movieYear = cmbMovieYear.ToString();  
movie newMovie = m.convertFilm(m);

我得到的错误是：输入字符串的格式不正确我做错了什么？

编辑 - 这是movieYear combobox

List<int> allYears = new List<int>();
allYears.AddRange(Enumerable.Range(1900, 113));
cmbMovieYear.DataSource = allYears;

编辑 -

m.movieYear = cmbMovieYear.SelectedItem.ToString();

这是解决方案。

Answer 1

您是否考虑过将movieYearInt属性的getter修改为这样的内容，而不是返回已转换的对象？

  public int movieYearInt 
  {
    get
    {
      // add some validation, and consider using System.Int32.TryParse
      return System.Int32.Parse(movieYear);
    }      
  }

Answer 2

public class movie: ICloneable
{
    public string movieName { get; set; }
    public string movieYear { get; set; }
    public int movieYearInt { get { return int.Parse(movieYear) set {movieYear = value.ToString()}}

    public object Clone()
    {
        return new movie() {movieName = this.movieName, movieYear = this.movieYear};
    }
}

var m = new movie();
m.movieYear = "2001";
var newMovie = (movie) m.Clone();

在类方法中创建和返回对象的副本

2 个答案: