int index = 0; ListViewItem lvi = new ListViewItem("ItemName"); index = this.listView.Items.IndexOf(lvi); 这里index一直得到的是-1, 但是this.listView中确实是有"ItemName"的啊?问题到底出哪里了?
你太逗了,item都没添加到listview,你查啥 int index = 0; ListViewItem lvi = new ListViewItem("ItemName"); this.listView.Items.Add(lvi); index = this.listView.Items.IndexOf(lvi);
添加过的 在另外一个函数里面, public void UpdateData(Hashtable hstb) { this.listView.Items.Clear(); foreach (DictionaryEntry de in hstb) { ListViewItem lvi = new ListViewItem(new string[] { (string)de.Key}); // de.key中包含"ItemName" this.listView.Items.Add(lvi); this.listView.Sorting = SortOrder.Ascending; this.listView.Sort(); } }private void insertToolStripMenuItem_Click(object sender, EventArgs e) { this.UpdateData(hstbList); this.listView.Select();
int index = 0; ListViewItem lvi = new ListViewItem("ItemName"); index = this.listView.Items.IndexOf(lvi); // index 一直返回-1 this.listView.Items[index].Selected = true; }
int index = 0; ListViewItem lvi = new ListViewItem("ItemName");-------------为什么还要实例化一个lvi,感觉有问题 index = this.listView.Items.IndexOf(lvi); // index 一直返回-1 this.listView.Items[index].Selected = true;
int index = 0; ListViewItem lvi = new ListViewItem("ItemName] //实例化 //中间加入 listview.items.add(lvi); index = this.listView.Items.IndexOf(lvi); // lvi并未加入listView,index当然是-1 this.listView.Items[index].Selected = true;
ListViewItem lvi = new ListViewItem("ItemName");
this.listView.Items.Add(lvi);
index = this.listView.Items.IndexOf(lvi);
public void UpdateData(Hashtable hstb)
{
this.listView.Items.Clear();
foreach (DictionaryEntry de in hstb)
{
ListViewItem lvi = new ListViewItem(new string[] { (string)de.Key}); // de.key中包含"ItemName"
this.listView.Items.Add(lvi);
this.listView.Sorting = SortOrder.Ascending;
this.listView.Sort();
}
}private void insertToolStripMenuItem_Click(object sender, EventArgs e)
{
this.UpdateData(hstbList);
this.listView.Select();
int index = 0;
ListViewItem lvi = new ListViewItem("ItemName");
index = this.listView.Items.IndexOf(lvi); // index 一直返回-1
this.listView.Items[index].Selected = true;
}
但this.UpdateData(hstbList); 运行后 listView中就应该加入"ItemName"了啊为什么一定要insertToolStripMenuItem_Click 退出后 "ItemName"才加入成功呢
ListViewItem lvi = new ListViewItem("ItemName");-------------为什么还要实例化一个lvi,感觉有问题
index = this.listView.Items.IndexOf(lvi); // index 一直返回-1
this.listView.Items[index].Selected = true;
只是作用域在insertToolStripMenuItem_Click中而已
ListViewItem lvi = new ListViewItem("ItemName] //实例化
//中间加入 listview.items.add(lvi);
index = this.listView.Items.IndexOf(lvi); // lvi并未加入listView,index当然是-1
this.listView.Items[index].Selected = true;