selecteditem

问题 My application contains a ComboBox that the user can delete items from. When the program starts up it populates the ComboBox from a list of strings read in from a configuration file. Here is the code to add items: // version list is an array of strings foreach (string version in versionList) { versionComboBox.Items.Add(version); } if (versionComboBox.Items.Count > 0) { versionComboBox.SelectedIndex = 0; } Here is a screenshot of the combo box after it's been populated: If the user clicks the

问题 I created a ListBox that has a DataTemplate as Itemtemplate . However, is there an easy way to access the generated UIElement instead of the SelectedItem in codebehind? When I access SelectedItem , I just get the selected object from my ItemsSource collection. Is there a way to access the UIElement (ie. the element generated from the DataTemplate together with the bound object)? 回答1: You are looking for the ItemContainerGenerator property. Each ItemsSource has an ItemContainerGenerator

问题 Ok been working with WPF for a while but I need some help. I have a ComboBox like below: <TabControl> <TabItem Header="1"> <ComboBox ItemsSource="{Binding MyList}" SelectedItem="{Binding MyListSelection}"/> </TabItem> <TabItem Header="2"/> </TabControl> Whenever I move away from tab 1 and then come back to it the selection gets removed. I think the reason for that is that the controls get destroyed when they go out of scope and then back in. But in the process of that the SelectedItem becomes

问题 I have some problems finding the right TextBlock control inside a StackPanel . My markup: <ListBox Name="lstTimeline" ItemContainerStyle="{StaticResource TwItemStyle}" MouseDoubleClick="lstTimeline_MouseDoubleClick"> <ListBox.ItemTemplate> <DataTemplate> <DockPanel MaxWidth="{Binding ElementName=lstTimeline, Path=ActualWidth}"> <Border Margin="10" DockPanel.Dock="Left" BorderBrush="White" BorderThickness="1" Height="48" Width="48" HorizontalAlignment="Center"> <Image Source="{Binding

问题 I know there are multiple threads on how to get the selected value of a DropDownList. However I can't find the right way to get this value from a partial view in my controller. This is my partial view: @model List<aptest.Models.answer> @Html.DropDownList("dropdownlist", new SelectList(Model, "text", "text")) <button type="submit">next</button> 回答1: In order to get dropdown value, wrap your select list in a form tag. Use models and DropDownListFor helper Razor View @model MyModel @using (Html

问题 I have a viewmodel which implement INotifyPropertyChanged . On this viewModel is a property called SubGroupingView . This property is bound to the selected item of a combo box. When i change the combo box, the source property is being updated fine, but when I change the source property or when the control is initialized, the combobox.selectedItem is NOT reflecting what exists in the property. Here is some code to get you started: <ComboBox Grid.Column="3" Grid.Row="1" Margin="0,1,4,1"

问题 I have a Listview that has a checkbox as one of the columns. If I click anywhere but the actual checkbox the SelectedItem of the ListView is set to the current selected row, as expected. If, on the other hand I click onto the checkbox (without clicking on the row first) then the SelectedItem is null or the previously clicked row. Can anyone help me out.... Cheers <ListView Width="auto" SelectionMode="Single" x:Name="listBox" ItemsSource="{Binding MyData}" SelectedItem="{Binding Path

问题 I Have a wpf Listbox that display's a list of textboxes. When I click on the Textbox the Listbox selection does not change. I have to click next to the TextBox to select the listbox item. Is there some property I need to set for the Textbox to forward the click event to the Listbox? 回答1: We use the following style to set a PreviewGotKeyboardFocus which handles all events of TextBox control and ComboBoxes and such: <ListView.ItemContainerStyle> <Style TargetType="ListViewItem"> <EventSetter

问题 I Have a wpf Listbox that display's a list of textboxes. When I click on the Textbox the Listbox selection does not change. I have to click next to the TextBox to select the listbox item. Is there some property I need to set for the Textbox to forward the click event to the Listbox? 回答1: We use the following style to set a PreviewGotKeyboardFocus which handles all events of TextBox control and ComboBoxes and such: <ListView.ItemContainerStyle> <Style TargetType="ListViewItem"> <EventSetter

问题 I have a combobox that is bound to a dictionary like this: Dictionary<int, string> comboboxValues = new Dictionary<int, string>(); comboboxValues.Add(30000, "30 seconds"); comboboxValues.Add(45000, "45 seconds"); comboboxValues.Add(60000, "1 minute"); comboBox1.DataSource = new BindingSource(comboboxValues , null); comboBox1.DisplayMember = "Value"; comboBox1.ValueMember = "Key"; I'm getting the key from the SelectedItem like this: int selection = ((KeyValuePair<int, string>)comboBox1