我有一些行，我希望用戶能夠通過 ctrl+a 選擇多個行，然后可以通過按鍵盤上的 Delete 鍵刪除所選項目。我的代碼不起作用?？梢酝ㄟ^ ctrl+A 選擇列表項，但按刪除按鈕后，只會刪除一項。private void lvTasks_KeyDown(object sender, KeyEventArgs e){ if (e.KeyCode == Keys.A && e.Control) { lvTasks.MultiSelect = true; foreach (ListViewItem item in lvTasks.Items) { item.Selected = true; } } if (e.KeyCode == Keys.Delete) foreach (ListViewItem eachItem in lvTasks.SelectedItems) { DeleteTask(); }}public void DeleteTask(){ if (lvTasks.SelectedItems.Count > 0) { lvTasks.Items.Remove(lvTasks.SelectedItems[0]); Statics.SaveTasks(lvTasks.Items.Cast<ListViewItem>().Select(l => (Task)l.Tag).ToArray()); UpdateTaskProgress(new Task()); txtDownloadLink.Text = ""; txtRarPassword.Text = ""; txtReferenceLink.Text = ""; chkBackupResource.Checked = Properties.Settings.Default.BackupSource; chkClearExtracted.Checked = Properties.Settings.Default.CleanExtract; chkRemoveRar.Checked = Properties.Settings.Default.RemoveRar; chkUseIDM.Checked = Properties.Settings.Default.UseIDM; chkRemoveDownload.Checked = Properties.Settings.Default.RemoveDownload; gbTaskProgress.SuspendLayout(); settings = Statics.LoadSettings(); gbTaskProgress.Controls.Clear(); int max = Enum.GetValues(typeof(TaskProgresses)).Cast<int>().LastOrDefault(); for (int i = 0; i <= max; i++) gbTaskProgress.Controls.Add(new TaskProgress(i + 1) { Left = 10, Top = (20 + 24 * i), Caption = ((TaskProgresses)i).ToString().CapitalSplit(), Task = new Task() }); gbTaskProgress.ResumeLayout(); lvTasks.Items.Clear();
2 回答
猛跑小豬
TA貢獻1858條經(jīng)驗 獲得超8個贊
private void lvTasks_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.A && e.Control)
{
lvTasks.MultiSelect = true;
foreach (ListViewItem item in lvTasks.Items)
{
item.Selected = true;
}
}
if (e.KeyCode == Keys.Delete)
for (int i = lvTasks.SelectedItems.Count - 1; i >= 0; i--)
{
ListViewItem itm = lvTasks.SelectedItems[i];
lvTasks.Items[itm.Index].Remove();
}
}
編輯
你的線路 lvTasks.Items.Remove(lvTasks.SelectedItems[0]);
這是問題所在。您只是刪除索引 0 處的項目。您需要對它們進行循環(huán)。
編輯 2僅當您要刪除所有項目時才有效。如果您真的只想刪除選定的項目。更改 for 循環(huán)并刪除 List ：
for (int i = lvTasks.SelectedItems.Count - 1; i >= 0; i--)
{
ListViewItem itm = lvTasks.SelectedItems[i];
lvTasks.Items[itm.Index].Remove();
}
那應該有效。
楊__羊羊
TA貢獻1943條經(jīng)驗 獲得超7個贊
我會使用一個while循環(huán)：
if (e.KeyCode == Keys.Delete)
{
while (lvTasks.SelectedItems.Count > 0)
{
lvTasks.SelectedItems[0].Remove();
}
}
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