c# - 如何在 Windows 窗体 C# 的选中列表框中保存选中的项目

Question

我正在开发一个游戏库应用程序，它将用户的游戏集合添加到列表视图中，其中包含多个子项。我有一个子项，它是一个复选框，可让您检查游戏适用于哪个平台或系统。我更改了列表视图的选定索引的代码，当您在列表视图中选择项目时，它会显示游戏标题的保存信息。但是，我无法弄清楚如何从选中的列表框中保存信息，并让它显示用户在选择指定游戏时之前选中的平台。我将所有内容都安排在班级中，我的代码如下。我试过f.platformCheckBox.CheckedItems.ToString() = f.Game[f.gameList.SelectedItems[0].Index].platform;在我的IndexChanged.cs类，但它会抛出一个错误，提示“赋值的左侧必须是变量、属性或索引器”。所以我无法做到这一点。下面是我的代码，如果有人对如何保存选中的列表框的内容有任何建议，我将不胜感激。注意：IndexChanged 类位于代码的底部，我想我可能会显示我的所有代码，以防万一我在代码的其他地方遗漏了一些重要的东西。

namespace GameLibrary
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public List<Library> Game = new List<Library>();
        public Library lib = new Library();

    public void saveBttn_Click(object sender, EventArgs e)
    {
        Save save = new Save();
        save.saveChanges(this);
    }

    private void button1_Click(object sender, EventArgs e)
    {
        Add add = new Add();
        add.addGame(this);
    }

    private void deleteBtnClick_Click(object sender, EventArgs e)
    {
        Delete delete = new Delete();
        delete.deleteGame(this);
    }

    private void gameList_SelectedIndexChanged(object sender, EventArgs e)
    {
        IndexChanged Index = new IndexChanged();
        Index.selectedIndexChanged(this);
    }

    private void searchBttn_Click_1(object sender, EventArgs e)
    {
        Search search = new Search();
        search.searchLibrary(this);
    }
}
public class Library
    {
        public string gametitle
        {
            get;
            set;
        }
        public string developer
        {
            get;
            set;
        }
        public string publisher
        {
            get;
            set;
        }
        public string platform
        {
            get;
            set;
        }
    }
class Save
    {
        public void saveChanges(Form1 f)
        {
            if (f.gameList.SelectedItems.Count == 1)
            {
                f.Game[f.gameList.SelectedItems[0].Index].gametitle = f.titleText.Text;
                f.Game[f.gameList.SelectedItems[0].Index].developer = f.developerText.Text;
                f.Game[f.gameList.SelectedItems[0].Index].publisher = f.publisherText.Text;
                f.Game[f.gameList.SelectedItems[0].Index].platform = f.platformCheckBox.CheckedItems.ToString();
            }
        }
    }
class Add
    {
        public void addGame(Form1 f)
        {
            f.lib.gametitle = f.titleText.Text;
            f.lib.developer = f.developerText.Text;
            f.lib.publisher = f.publisherText.Text;
            f.lib.platform = f.platformCheckBox.CheckedItems.ToString();
            f.Game.Add(f.lib);
            f.gameList.Items.Add(f.lib.gametitle);
            f.titleText.Clear();
            f.developerText.Clear();
            f.publisherText.Clear();
            foreach (int i in f.platformCheckBox.CheckedIndices)
            {
                f.platformCheckBox.SetItemCheckState(i, CheckState.Unchecked);
            }
        }
    }
class Search
    {
        public void searchLibrary(Form1 f)
        {
            foreach(ListViewItem item in f.gameList.Items)
            {
                if(item.Text.StartsWith(f.lib.gametitle))
                {
                    item.Selected = true;
                    item.BackColor = SystemColors.Highlight;
                    item.ForeColor = SystemColors.HighlightText;
                }
                else
                {
                    item.Selected = false;
                    item.BackColor = SystemColors.Window;
                    item.ForeColor = SystemColors.WindowText;
                    MessageBox.Show("Game title not found in library");
                }
            }
            if(f.gameList.SelectedItems.Count == 1)
            {
                f.gameList.Focus();
                f.titleText.Text = f.Game[f.gameList.SelectedItems[0].Index].gametitle;
                f.developerText.Text = f.Game[f.gameList.SelectedItems[0].Index].developer;
                f.publisherText.Text = f.Game[f.gameList.SelectedItems[0].Index].publisher;
                f.gameList.SelectedItems[0].Text = f.titleText.Text;
            }
        }
    }
class IndexChanged
    {
        public void selectedIndexChanged(Form1 f)
        {
            if(f.gameList.SelectedItems.Count == 1)
            {
                f.titleText.Text = f.Game[f.gameList.SelectedItems[0].Index].gametitle;
                f.developerText.Text = f.Game[f.gameList.SelectedItems[0].Index].developer;
                f.publisherText.Text = f.Game[f.gameList.SelectedItems[0].Index].publisher;
                f.platformCheckBox.CheckedItems.ToString() = f.Game[f.gameList.SelectedItems[0].Index].platform; //This is where it throws the error
            }
        }
    }
}