Question

我有一个League.cs文件，其中包含项目的所有联赛

当我尝试在组合框上显示此数据时，它显示“App.Toolkit.Parameter”而不是联盟名称。

我将此代码用于组合：

foreach (League item in League.GetAll()) { comboBox1.Items.Add(item); }

和league.cs文件：

using System.Collections.Generic;

namespace App.Toolkit.Parameter
{
    public class League : SearchParameterBase<uint>
    {
        public const uint BarclaysPremierLeague = 13;

        public const uint Bundesliga = 19;

        public const uint LigaBbva = 53;

        public const uint Ligue1 = 16;

        public const uint SerieA = 31;

        private League(string description, uint value)
        {
            Description = description;
            Value = value;
        }

        public static IEnumerable<League> GetAll()
        {
            yield return new League("Barclays Premier League", BarclaysPremierLeague);
            yield return new League("Bundesliga", Bundesliga);
            yield return new League("Liga BBVA", LigaBbva);
            yield return new League("Ligue 1", Ligue1);
            yield return new League("Serie A", SerieA);
        }
    }
}

感谢adv：）

Answer 1

您可以设置ComboBox的DisplayMember：

comboBox1.DisplayMember = "Description";

或者您可以覆盖ToString班级中的League：

public override string ToString()
{
 return Description;
}

Answer 2

你应该设置

comboBox1.DisplayMember = "Description";
comboBox1.ValueMember = "Value";

那就是说，我建议使用databindungs;

var bs = new BindingSource(League.GetAll().ToList(), null);

comboBox1.DisplayMember = "Description";
comboBox1.ValueMember = "Value";
comboBox1.DataSource = bs;

这允许你

a）使用bs.Current来访问所选的文章 b）使用bs.MoveNext() / bs.MoveFirst()更改选定的Leage c）重新加载你的leages而不修改组合框，只需将bs.DatasSource设置为其他东西。

更少的代码，更少的错误，更少的头痛

private void Init()
{
    var bs = new BindingSource(...);
    bs.AddingNew += new AddingNewEventHandler(bs_AddingNew);
}

void bs_AddingNew(object sender, AddingNewEventArgs e)
{
    string name = AskForName();
    e.NewObject = CreateLeage(name);
}

现在你可以打电话

bs.AddNew();

代码中的某处。

Answer 3

您可以覆盖联盟课程中的ToString方法：

  public override string ToString()
    {
        return this.description;
    }

Answer 4

覆盖ToString()方法会有所帮助。

Answer 5

您已将对象添加到组合框并需要更改代码：

using System.Collections.Generic;

namespace App.Toolkit.Parameter
{
public class League : SearchParameterBase<uint>
{
    public const uint BarclaysPremierLeague = 13;

    public const uint Bundesliga = 19;

    public const uint LigaBbva = 53;

    public const uint Ligue1 = 16;

    public const uint SerieA = 31;

    private League(string description, uint value)
    {
        Description = description;
        Value = value;
    }



    public static IEnumerable<League> GetAll()
    {
        yield return new League("Barclays Premier League", BarclaysPremierLeague);
        yield return new League("Bundesliga", Bundesliga);
        yield return new League("Liga BBVA", LigaBbva);
        yield return new League("Ligue 1", Ligue1);
        yield return new League("Serie A", SerieA);
    }

    public override string ToString()
    {
        return Description;
    }
  }
}

ovveride toString（）方法。

C＃：将项添加到comboBox错误

5 个答案: