Question

我正在创建一个程序，当用户从组合框中选择了某些东西时，它会更新列表框，然后在用户选择列表框中提供的选项之一后，旁边的标签它几乎会显示所选项目的描述。

这是一张界面图片，可以让您更好地了解：

到目前为止，我想出了这段代码：

  public MainHub()
        {
            InitializeComponent();

            listbox1.DataSource = choices;
            listbox1.DisplayMember = name;
        }

        private void listbox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            description_label.Text = valikud.ElementAt(listbox1.SelectedIndex).description;

        }

        List<dynamic> choices = new List<dynamic>()
        {

            new
            {
                name = "Name1",
                desciption = "Description1"
            },

            new
            {
                name = "Name2",
                desciption = "Description2"
            }

        };    
    }
}

这只是在列表框中添加名称并附上说明。

如何在组合框中选择项目时，列表框将更新，添加声明的项目，然后声明的列表框项目将各自有自己的描述？

我尝试使用if语句执行此操作，但没有运气

-Thanks！

Answer 1

以下是我认为可以做到的。我没有测试过，因为我现在不能这样做，而且我是从头脑中写下来的。我会在下午进行测试，但在此之前，如果我做错了，你可以自己弄清楚（也是评论，我会给出答案，直到我测试它）

所以这是代码：

public class MainHub
{
    List<List_Category> category = new List<List_Category>();
    List<Items> items = new List<Items>();

    public MainHub()
    {
        InitializeComponent();

        category.Add(new List_Category { CategoryIndex = 0, CategoryName = "Swords" }); // Add some category
        category.Add(new List_Category { CategoryIndex = 1, CategoryName = "Shields" }); // Add some category

        items.Add(new Items { CategoryIndex = 0, ItemName = "Long sword", ItemDesc = "Long sword is heavy sword with pure force" }); //Add some item to swords
        items.Add(new Items { CategoryIndex = 0, ItemName = "Short sword", ItemDesc = "Short sword is easy sword for close range fight" }); //Add some item to swords
        items.Add(new Items { CategoryIndex = 0, ItemName = "Double swords", ItemDesc = "Double swords are swords with hight mobility" }); //Add some item to swords

        items.Add(new Items { CategoryIndex = 1, ItemName = "Light shield", ItemDesc = "Light shield desc" }); //Add some item to shields
        items.Add(new Items { CategoryIndex = 1, ItemName = "Heavy shield", ItemDesc = "Heavy shield desc" }); //Add some item to shields

        comboBox1.DisplayMember = "CategoryName";
        comboBox1.ValueMember = "CategoryIndex";

        comboBox1.DataSource = category;

        listBox1.DisplayMember = "ItemName";
        listBox1.ValueMember = "CategoryIndex";

        comboBox1.SelectedIndex = 0;
    }

    private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        List<Items> tempItems = new List<Items>();
        switch (Convert.ToInt32(comboBox1.SelectedValue))
        {
            case 0:
                var item = items.Where(cat => cat.CategoryIndex == 0);

                foreach (var i in item)
                {
                    tempItems.Add(new Items { CategoryIndex = i.CategoryIndex, ItemDesc = i.ItemDesc, ItemName = i.ItemName });
                }
                break;
            case 1:
                item = items.Where(cat => cat.CategoryIndex == 1);

                foreach (var i in item)
                {
                    tempItems.Add(new Items { CategoryIndex = i.CategoryIndex, ItemDesc = i.ItemDesc, ItemName = i.ItemName });
                }
                break;
            default:
                break;
        }
        listBox1.DataSource = tempItems;
    }

    private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        var asd = listBox1.SelectedItem as Items;
        if (asd != null)
        {
            name_Label.Text = asd.ItemName;
            description_label.Text = asd.ItemDesc;
        }
    }
}


public class List_Category
{
    public int CategoryIndex { get; set; }
    public String CategoryName { get; set; }
}

public class Items
{
    public int CategoryIndex { get; set; }
    public String ItemName { get; set; }
    public String ItemDesc { get; set; }
}

它可以被优化，但正如我所说我现在不能这样做所以自己尝试一下。如果我犯了一些错误或弹出一些错误，请发表评论，然后我会回答。

不同的组合框选择改变列表框和＆amp;标签内容

1 个答案: