c# - 如何从另一个类访问列表视图？

Question

我有一个使用 netTCPbinding 连接的 WCF 服务库和客户端 [Winform]。
客户端调用了一个函数Search(string txtSearch,string path)，服务器应该发回结果，但我不希望客户端等待结果，我需要服务器独立发回。所以每当服务器发回一个项目时，客户端应该将它添加到 listView1 。

这是客户端应用程序的一些代码，所以如果可能的话，我怎么需要从Callback类中访问 listView1 ！

public partial class Form1 : Form
{
    FileManagerClient client;
    public Form1()
    {
        InitializeComponent();
        InstanceContext ctx = new InstanceContext(new Callback());
        client = new FileManagerClient(ctx);
    }
}

class Callback : IFileManagerCallback
{
   public void Folder(_Folder folder)
   {
         ListViewItem item = new ListViewItem();
         item.Text = folder.Name;
         item.ToolTipText = folder.Path;
         item.Tag = item.ImageIndex;
         item.Name = item.Text;
         //Add item to listView1
   }

   public void File(_File file)
   {
         ListViewItem item = new ListViewItem();
         item.Text = file.Name;
         item.ToolTipText = file.Path;
         item.Tag = item.ImageIndex;
         item.Name = item.Text;
         //Add item to listView1
   }
}

Answer 1

实施事件

 public partial class Form1 : Form
{
    FileManagerClient client;
    public Form1()
    {
        InitializeComponent();
        Callback callback = new Callback();
        //Subscribe event for notification
        callback.OnDataReceivedEvent +=new Callback.OnDataReceived(callback_OnDataReceivedEvent);
        InstanceContext ctx = new InstanceContext(callback);
        client = new FileManagerClient(ctx);
    }

    private void callback_OnDataReceivedEvent(object sender, ListViewItem item)
    {
        //Add item here
    }
}

class Callback : IFileManagerCallback
{
    private delegate void OnDataReceived(object sender, ListViewItem item);

    private OnDataReceived _dataReceivedHandler = null;
    public event OnDataReceived OnDataReceivedEvent {
        add { _dataReceivedHandler += value; }
        remove { _dataReceivedHandler -= value; }
    }

    public void Folder(_Folder folder)
    {
        ListViewItem item = new ListViewItem();
        item.Text = folder.Name;
        item.ToolTipText = folder.Path;
        item.Tag = item.ImageIndex;
        item.Name = item.Text;
        RaiseEvents(item);
        //Add item to listView1
    }

    public void File(_File file)
    {
        ListViewItem item = new ListViewItem();
        item.Text = file.Name;
        item.ToolTipText = file.Path;
        item.Tag = item.ImageIndex;
        item.Name = item.Text;
        RaiseEvents(item);
        //Add item to listView1
    }

    private void RaiseEvents(ListViewItem item)
    {
        if (_dataReceivedHandler != null)
        {
            _dataReceivedHandler(this, item);
        }
    }
}

Answer 2

因为我需要从 Form1.cs 访问许多其他东西，所以我认为这是最好的方法。

程序.cs：

static class Program
{
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run((MainForm = new Form1()));
    }
    public static Form1 MainForm;
}

我将 listView1 修饰符更改为 Public，因此我可以从任何类访问 Form1 公共项目：

   public void Folder(_Folder folder)
    {
        ListViewItem item = new ListViewItem();
        item.Text = folder.Name;
        item.ToolTipText = folder.Path;
        item.Tag = item.ImageIndex;
        item.Name = item.Text;
        item.Group = Program.MainForm.listView1.Groups[1];
        item.ImageIndex = Program.MainForm._iconListManager.AddFolderIcon(folder.Path);
        Program.MainForm.listView1.Items.Add(item);
    }

    public void File(_File file)
    {
        ListViewItem item = new ListViewItem();
        item.Text = file.Name;
        item.ToolTipText = file.Path;
        item.Tag = item.ImageIndex;
        item.Name = item.Text;
        item.SubItems.Add(Program.MainForm.CnvrtUnit(file.Size));
        item.Group = Program.MainForm.listView1.Groups[0];
        item.ImageIndex = Program.MainForm._iconListManager.AddFileIcon(file.Path);
        Program.MainForm.listView1.Items.Add(item);
    }