Question

我一直在互联网上寻找这个并找到类似的东西，但它都不适用于我。我发现的一切都假定列表框在主窗体而不是辅助窗体上，或者代码是旧版本的C＃或Visual Studio（我使用的是VS2008）。

我正在创建一个Web浏览器，在主窗体上有一个按钮（称为frmMyBrowser），打开一个带有书签URL的列表框（lstBookmark）的对话框（frmBookmarks）。我需要能够双击一个项目（带书签的URL）并将文本粘贴到主窗体的地址栏（cmbAddress）中。

任何帮助都会非常感激。

Answer 1

我发现如果我在运行时创建窗口，我可以让它工作。如果有人感兴趣，我使用的代码如下。

public void frmMyBrowser_ShowFavorites（object sender，EventArgs e）

{

        frmFavorites.ShowIcon = false;
        frmFavorites.ShowInTaskbar = false;
        frmFavorites.MinimizeBox = false;
        frmFavorites.MaximizeBox = false;
        frmFavorites.ControlBox = false;
        frmFavorites.Text = "Bookmarks";
        frmFavorites.Width = 500;
        frmFavorites.Height = 350;
        frmFavorites.Controls.Add(lstFavorites);
        frmFavorites.Controls.Add(btnRemoveFavorite);
        frmFavorites.Controls.Add(btnAddFavorite);
        frmFavorites.Controls.Add(btnCloseFavorites);
        frmFavorites.Controls.Add(txtCurrentUrl);
        lstFavorites.Width = 484;
        lstFavorites.Height = 245;
        btnRemoveFavorite.Location = new Point(8, 280);
        btnAddFavorite.Location = new Point(8, 255);
        btnCloseFavorites.Location = new Point(400, 255);
        txtCurrentUrl.Location = new Point(110, 255);
        txtCurrentUrl.Size = new Size(255, 20);
        btnAddFavorite.Text = "Add";
        btnRemoveFavorite.Text = "Remove";
        btnCloseFavorites.Text = "Close";
        txtCurrentUrl.Text = wbBrowser.Url.ToString();
        btnAddFavorite.Click += new EventHandler(btnAddFavorite_Click);
        btnRemoveFavorite.Click += new EventHandler(btnRemoveFavorite_Click);
        frmFavorites.Load += new EventHandler(frmFavorites_Load);
        btnCloseFavorites.Click += new EventHandler(btnCloseFavorites_Click);
        lstFavorites.MouseDoubleClick += new MouseEventHandler(lstFavorites_MouseDoubleClick);
        frmFavorites.Show();
}

public void btnCloseFavorites_Click(object sender, EventArgs e)
{
if (lstFavorites.Items.Count > 0)
{
using (StreamWriter writer = new System.IO.StreamWriter(@Application.StartupPath + "\\favorites.txt"))
{
for (int i = 0; i < lstFavorites.Items.Count; i++)

{

writer.WriteLine(lstFavorites.Items[i].ToString());

}

writer.Close();
}

}
    frmFavorites.Hide();
}

public void btnAddFavorite_Click(object sender, EventArgs e)

    {
        string strFavoriteAddress = wbBrowser.Url.ToString();
        if (!lstFavorites.Items.Contains(strFavoriteAddress))
        {
            lstFavorites.Items.Add(strFavoriteAddress);
            MessageBox.Show("Favorite Added", "Message");

        }
        else if (lstFavorites.Items.Contains(strFavoriteAddress))
        {   
            MessageBox.Show("This site already exists in your Favorites list!", "Error");

        }
        else 
        {

        }


    }
    public void btnRemoveFavorite_Click(object sender, EventArgs e)
    {
        try
        {
            lstFavorites.Items.RemoveAt(lstFavorites.SelectedIndices[0]);

        }

        catch
        {
            MessageBox.Show("You need to select an item", "Error");

        }

    }
    public void frmFavorites_Load(object sender, EventArgs e)
    {
        try
        {
            using (StreamReader reader = new System.IO.StreamReader(@Application.StartupPath + "\\favorites.txt"))
            {
                while (!reader.EndOfStream)
                {
                    for (int i = 0; i < 4; i++)
                    {
                        string strListItem = reader.ReadLine();
                        if (!String.IsNullOrEmpty(strListItem))
                        {
                            lstFavorites.Items.Add(strListItem);
                        }
                    }

                }
                reader.Close();
            }



        }
        catch
        {
            MessageBox.Show("An error has occured", "Error");
        }

    }
    private void lstFavorites_MouseDoubleClick(object sender, MouseEventArgs e)
    {
        string strSelectedAddress = lstFavorites.Text.ToString();
        cmbAddress.Text = strSelectedAddress;
        wbBrowser.Navigate(strSelectedAddress);
        frmFavorites.Hide();
    }

需要帮助从二级表单到主表单获取列表框项目文本

1 个答案: