ListView selectedindexchanged

Question

当我从列表视图中单击"项目"时,我需要帮助才能获得响应.知道有selectindexchanged,但当我尝试显示一个MessageBox没有任何反应时,已经尝试了很多其他的东西,但没有设法提出一些东西.

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        ...
        while (reader.Read())
        {
            string alio = reader["fornamn"].ToString();
            string efternamn = reader["efternamn"].ToString();
            ListViewItem lvi = new ListViewItem(alio);
            listView1.Items.Add(lvi);
            lvi.SubItems.Add(efternamn);
        }
    }

    private void listView1_SelectedIndexChanged(object sender, EventArgs e)
    {

    }
}

Answer 1

假设81.private void listView1_SelectedIndexChanged已正确链接到listview,您需要查询listview以找出所选内容:

private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
  if(this.listView1.SelectedItems.Count == 0)
    return;

  string namn = this.listView1.SelectedItems[0].Text;

  // Create the sql statement to retrieve details for the user
  string sql = string.Format("select * from kunder where fornamn = '{0}', namn);

  // do the same as you do to create a reader and update the controls.
}