单击ListView上的按钮不起作用
本文关键字:按钮 不起作用 ListView 单击 | 更新日期: 2023-09-27 18:01:04
我试图点击或双击我的listview,但我的listview1_1点击似乎不起作用。每当我点击所选项目时,都不会弹出任何消息框。我按照通常的格式创建了一个点击事件,但这似乎不起作用。是因为我正在将数据库中的数据加载到列表视图中,而不是在列表视图中创建的数据吗?非常感谢!
using System;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace sundayschoolproject
{
public partial class Form1 : Form
{
string con = ("Data Source=ZTABASSUM''SQLEXPRESS01;Initial Catalog= Sunday School;Integrated Security=True");
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
listView1.GridLines = true;
listView1.View = View.Details;
//Add Columns
listView1.Columns.Add("ParentName", 100);
listView1.Columns.Add("Address", 150);
listView1.Columns.Add("City", 100);
listView1.Columns.Add("State", 50);
listView1.Columns.Add("Zipcode", 100);
listView1.Columns.Add("Phone", 150);
}
private void button1_Click(object sender, EventArgs e)
{
string sql = ("Select * from Family");
SqlConnection connection = new SqlConnection(con);
SqlCommand cmd = new SqlCommand(sql, connection);
connection.Open();
SqlDataReader dr = cmd.ExecuteReader();
listView1.Items.Clear();
while (dr.Read())
{
ListViewItem lv = new ListViewItem(dr.GetString(0));
lv.SubItems.Add(dr.GetString(1));
lv.SubItems.Add(dr.GetString(2));
lv.SubItems.Add(dr.GetString(3));
lv.SubItems.Add(dr.GetString(4));
lv.SubItems.Add(dr.GetString(5));
listView1.Items.Add(lv);
}
dr.Close();
connection.Close();
}
private void listView1_Click(object sender, MouseEventArgs e)
{
if (listView1.SelectedItems.Count > 0)
{
MessageBox.Show("You clicked " + listView1.SelectedItems[0].Text);
}
else
{
MessageBox.Show("Please select an item");
}
}
}
}
我认为您正试图单击ListViewItem
具有的SubItems
之一,但什么也没发生。
好吧,为了能够使子项可点击,您需要首先使ListView的FullRowSelect
属性允许整行选择:
listView1.FullRowSelect = true;
那么您可以使用ListView.HitTest
方法,该方法为您提供位于给定点的项目的信息。
您可以在MouseClick
或MouseDoubleClick
中使用ListView.HitTest
方法,而不是Click
或DoubleClick
事件,因为它们提供了MouseEventArgs
类的实例,可以帮助您获取鼠标位置。您将在HitTest
方法中使用它来定位单击的子项,请尝试以下操作:
private void listView1_MouseClick(object sender, MouseEventArgs e)
{
// Get the information of an item that is located in a given point (mouse location in this case).
ListViewHitTestInfo hit = listView1.HitTest(e.Location);
// hit.Item: Gets the ListViewItem.
// hit.SubItem: Get the ListViewItem.ListViewSubItem
if (listView1.SelectedItems.Count > 0)
{
MessageBox.Show("You clicked " + hit.SubItem.Text);
}
else
{
MessageBox.Show("Please select an item");
}
}