I created a project that collects Personal Informations. I added a combobox to get title of Personal. Combobx items which is in ENUM, added at load. I save informations at listview, everythings Runs Perfectly i have double click event for listview. It returns all information to the their first position like Textboxes. But Combobox doesnt get its value to back. Can you show me how i can do ?
Enums Added ComboBox
cbUnvan.Items.AddRange(Enum.GetNames(typeof(Unvan)));
if Combobox item (which is Enum) selected, goes to personel.Unvan Property. (Personel is Class)
personel.Unvan = (Unvan)Enum.Parse(typeof(Unvan), cbUnvan.SelectedItem.ToString());
When i double click to listview item informations goes to their places. example is at below
txtTC.Text = lvTablo.SelectedItems[0].SubItems[0].Text;
dtpIseGirisTarihi.Value = Convert.ToDateTime(lvTablo.SelectedItems[0].SubItems[3].Text);
MY PROBLEM IS HERE -- But Combobox doesnt do same action with this code below
cbUnvan.SelectedItem = (Unvan)Enum.Parse(typeof(Unvan), lvTablo.SelectedItems[0].SubItems[8].Text);
Related
I have a List (named actors) of "Actors", a custom class to be displayed in a ListBox (named listBoxActors) in C#. The user will be able to click an item to highlight and select it, after which they can press a button that Removes that Actor from the list. Here is my code for the button when it is pressed:
Actor current = (Actor) listBoxActors.SelectedItem;
actors.Remove(current);
listBoxActors.DataSource = null;
listBoxActors.DataSource = actors;
However, even after pressing the button, the Actor still displays in the list box as if it had never been removed at all. Setting the DataSource to null and back to the actors list should refresh it (works fine for that purpose when I add actors), but the list remains the same. What should I add/remove? What am I doing wrong?
You can simply use Remove function:
listBoxActors.Items.Remove(listBoxActors.SelectedItem);
Hope it helps!!
I have a Combobox with several items (C# Labels because I want to change individual text colors). Within callbacks, when editing some textboxes, I change the color and/or text of the items. When I click on the combobox I see that the items in the list have the correct color/text. However, the color/text changes of the selected item are not directly reflected in the shown combobox text. How can I achieve that?
I tried to set the Text property of the combobox itself: no effect. Also setting the selected item to an empty Label and then set it back to the correct Label has no effect. If I set SelectedIndex to -1 and then back to the correct selected index it works and the shown text is updated, but this triggers the SelectionChanged callback which I do not want. I could first detach the SelectionChanged callback from the combobox and then attach it again, but this is in my opinion very ugly programming.
Maybe I am missing something simple...
Edit
I tried binding, following the suggestion of SLak:
List<Label> labels;
MyComboBox.ItemsSource = labels;
The result is still the same. Suppose index 0 is selected. When I change the corresponding Label:
labels[0].Contents = "new content";
then it is not reflected in the selected text of the combobox. When I click the combobox I can see the new text in the unfolded list, but only when I change the selection and then go back to index 0 the new text is shown by the combobox as the selected item. That synchronization should be autmatically.
I'm coding a combobox in C# and for some reason the items in the drop down don't have text. When I have selected an item, it is shown in the combo box text field (the drop down list is always blank whenever I click the drop down button). The datasource seems bound properly because the proper values are being returned when I select items, and the size of the drop down list will change depending on how many items the datasource has. Everything looks fine except for the fact that it seems like my drop down is populated with a bunch of empty strings, which it clearly isn't since as soon as an item is selected the proper text will display.
This is the relevant code:
if (list.Count > 0)
{
cboCustomers.DisplayMember = "Name";
cboCustomers.DataSource = list;
cboCustomers.ValueMember = "ID";
cboCustomers.SelectedIndex = 0;
}
I have looked for an answer to this but can't find it anywhere...I'm sure it's something really simple, but I can't figure it out. The closest problem I found had an answer suggested to set the display member before the data source, which clearly didn't work.
The list is populated from a database query. This will run on keyUp, the idea is that the list is populated as the person is typing based on the info given. So if I wrote 'S' I'd get a combobox with a dropdown that had all the clients starting with 'S'.
Given you don't have any anomalies in your binding, you are probably being affected by DrawMode property of your ComboBox, which may be set to OwnerDrawFixed or OwnerDrawVariable. Set it to Normal and things should get better.
as soon as an item is selected the proper text will display.
A foreground color the same as the background color will produce the same results you are seeing.
I am setting up a ComboBox to use the AutoComplete feature with AutoCompleteMode = Append and AutoCompleteSource = ListItems. When I load my form the Item list of the ComboBox is empty, and then I keep adding new values from the ComboBox.Text on a specified event (when a specific button is pressed).
Bottom line is that when the ComboBox's Items property is populated dynamically from an event, the AutoCompletion does not work as expected. My first entry into ComboBox.Items, always completes properly, but the later ones don't. If I click the arrow to dropdown the list, then all the Items so far entered autocomplete properly. If I Alt-Tab into another application and come back to the combobox, all the Items entered so far autocomplete properly.
It comes across to me that internally the combobox reloads its autocomplete list based on some event, but so far I have tried calling
ResumeLayout(true);
Refresh();
Invalidate(true);
Update();
DroppedDown = true;
DroppedDown = false;
but to no avail
Can someone enlighten me on how to dynamically add entries in the ComboBox.Items list and still have auto-complete with ComboBox.AutoCompleteSource = ListItems work correctly.
btnExecute is the default button on the form which contains the combobox. So the below function is invoked on pressing enter on the combobox
private void btnExecute_Click( object sender, EventArgs e ) {
cboCommand.SuspendLayout();
cboCommand.Items.Add(cboCommand.Text);
cboCommand.Text = "";
// Make some call here, so combobox reloads its cache for autocompletion
}
relevant portion from the auto generated winforms code
this.cboCommand.AutoCompleteMode = System.Windows.Forms.AutoCompleteMode.Append;
this.cboCommand.AutoCompleteSource = System.Windows.Forms.AutoCompleteSource.ListItems;
this.cboCommand.FormattingEnabled = true;
I am using .NET4 Client profile on Windows Vista. May be it plays a role here
Anyone?
Here is the situation:
I have populated a combo box with the names of divisions in my company and it is working fine. I go into edit mode and pull one record out of the data table so I bind all controls on the form with one record. I also populate this combo box with all divisions but want it to display the selected division. While I know how to display correct date in textbox controls, I do not know how to make combo box display only selected data. It displays the first record from the query which populates it. Any suggestions?
Thanks
Not clear if you are using ASP.NET or Windows Form. I am assuming Windows Form at the moment since it has an actual ComboBox control, while ASP.NET only has DropDownList (not counting the AJAX Control Toolkit).
ComboBox has a bunch of Selected... properties, i.e. SelectedIndex, SelectedItem, SelectedValue, SelectedText that you can manipulate (set) to show a certain item on the screen. So you can just do cbDivision.SelectedText = myRecord.Division (assuming Division in myRecord contains the same name as the one bound in the ComboBox.
for reference, see: this
I'm not sure I understood your question correctly. But I think you just want to display the selectedValue in the dropdown list populated from a list of values.
< asp:DropDownList DataTextField="SomeDecsription" DataValueField="SomeValue" ...... />
I apologise if this is not what you were asking for