Question

我想在通用列表中找到成员的名字，我们可以帮助我解决这个问题吗？我必须检查列表中的每个用户，如果其中一个值等于例如＆＃34; 100＆＃34;必须知道这个值的名称。我知道如何使用参数值，但我无法获得属性。

此致

public List<Users> LiUsers = new List<Users>();
    private void button1_Click(object sender, EventArgs e)
    {
        int r = 100;
        foreach (var user in LiUsers)
        {

             //do some stuff

            //here I want name of member which equals int r ... eg  "Value1" or "Value2" ...

        }
    }

    private void FillUsers(string name, int id, int val1, int val2, int val3, int val4, int val5)
    {
        LiUsers.Add(new Users { Name = name, Id = id, Value1 = val1, Value2 = val2, Value3 = val3, Value4 = val4, Value5 = val4 });
    }
}
public class Users : IEnumerable
{
    public string Name { get; set; }
    public int Id { get; set; }
    public int Value1 { get; set; }
    public int Value2 { get; set; }
    public int Value3 { get; set; }
    public int Value4 { get; set; }
    public int Value5 { get; set; }

    public IEnumerator GetEnumerator()
    {
        yield return Name;
        yield return Id;
        yield return Value1;
        yield return Value2;
        yield return Value3;
        yield return Value4;
        yield return Value5;
    }
}

Answer 1

您可以使用Reflection获取属性的值，然后使用LINQ获取值为100的属性的名称：

var userType = typeof(User);
var properties = userType
                .GetProperties()
                .Where(x => x.Name.StartsWith("Value")).ToList();

foreach (var user in LiUsers)
{
    var property  = properties.FirstOrDefault(x => (int)x.GetValue(user) == 100);
    if(property != null)
    {
        string name = property.Name;
    }
}

在列表中查找成员的名称

1 个答案: