我有一個顯示給用戶的項目集合。WPF刪除列表框項目
雙擊特定項目後,我想從列表中刪除此項目。
我已經完成了這種方式,我不喜歡這樣修改數據源,而不僅僅是列表中的項目。我也意識到,如果我有1000條記錄,刷新將會非常緩慢。
這裏有一些更好的方式從列表框中刪除項目?
我不想修改數據源,因爲我也將其用於歷史。
僞數據組了:從列表中刪除
private void SetUpData()
{
this.users = new List<UserNames>();
this.users.Add(new UserNames() {Id = 1, UserName = "name 1"});
this.users.Add(new UserNames() { Id = 2, UserName = "name 2" });
this.users.Add(new UserNames() { Id = 3, UserName = "name 3" });
this.users.Add(new UserNames() { Id = 4, UserName = "name 4" });
this.users.Add(new UserNames() { Id = 5, UserName = "name 5" });
this.users.Add(new UserNames() { Id = 6, UserName = "name 6" });
this.users.Add(new UserNames() { Id = 7, UserName = "name 7" });
this.users.Add(new UserNames() { Id = 8, UserName = "name 8" });
this.users.Add(new UserNames() { Id = 9, UserName = "name 9" });
this.users.Add(new UserNames() { Id = 10, UserName = "name 10" });
this.listBox1.DataContext = users;
}
我的項目的方法。
private void listBox1_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
UserNames itemToRemove = (UserNames)((ListBox)sender).SelectedItem;
MessageBox.Show(itemToRemove.UserName);
this.listBox1.DataContext = null;
this.users.Remove(itemToRemove); // remove from list
this.listBox1.DataContext = this.users; // update data source
}
我的列表框的定義:
<ListBox Grid.Column="1" Grid.Row="1" Name="listBox1" ItemsSource="{Binding}" SelectedValuePath="Id" MouseDoubleClick="listBox1_MouseDoubleClick">
<ListBox.ItemTemplate>
<DataTemplate>
<Label Content="{Binding UserName}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>