Question

c# listview控件中如何在选中某一行时将此行的第3列数据提取到文本框中显示

Answer 1

现在设计里双击listview，就会产生 listView1_SelectedIndexChanged(object sender, EventArgs e)的函数，函数应该如下写：（根据你的listView的名称更改下面listView1）
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
if (listView1.SelectedIndices != null && listView1.SelectedIndices.Count > 0)
{
ListView.SelectedIndexCollection c = listView1.SelectedIndices;
textBox1.Text = listView1.Items[c[0]].SubItems[2].Text;
}
}