combobox

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 years ago . I'm dealing with the fact that when I clear items in a combobox programmatically, the text do not change and keep the last selected item. How can I do it? 回答1: Try comboBox.SelectedIndex = -1; Or comboBox.Items.Clear(); comboBox.ResetText(); 回答2: Another way for combo boxes: Populate comboBox1

问题 I have a form where i have 23 Comboboxes . Writing SelectedIndex=-1 for every combobox will definitely work but i want to know whether there's any other way of doing it as done in below given example. ? For Each ctl As Control In (GroupBox1.Controls) If TypeOf ctl Is TextBox Then ctl.Text = "" End If Next i tried this, If TypeOf ctl Is ComboBox Then ctl.selectedIndex=-1 End If but it doesn't works. Please help me out. 回答1: In your example your ctl variable is a Control and not a Combobox so

问题 I am a newbie to MFC. I don't know how to add values to a combobox. I have a vector class. This is my code. CellPhone cp; vector<CellPhone> cellPhoneList; cellPhoneList = cp.loadCellPhone(); m_pComboBox.SetCurSel(0); for(unsigned int i=0; i<cellPhoneList.size(); i++) { CString str = cellPhoneList[i].getSerialNumber(); m_pComboBox.AddString(str); } serialNumber's type is CString. combobox does not show serialNumber list. how can I do? 回答1: The m_p ComboBox variable name suggests that this is a

问题 I'm a starter at WPF, now i would like to make a WPF userControl library which include a Rating bar userControl. All the steps of creating the rating Bar has been done, however i would like to add a property RatingValue: public static readonly DependencyProperty RatingValueProperty = DependencyProperty.Register("RatingValue", typeof(int), typeof(RatingControl), new FrameworkPropertyMetadata(0, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback

问题 I am using iscroll4 in my application. I am facing problem with iScroll that made drop down lists(combo box) unusable when used at the same time. I tried how they mentioned here ( http://groups.google.com/group/iscroll/browse_thread/thread/5b2fbad6aa667907# ) $(document).ready(function() { var destinations_scroll, accounts_scroll; function loadingIscroll() { accounts_scroll = new iScroll('accounts_container'); destinations_scroll = new iScroll('destinations_container', { checkDOMChanges: true

问题 I would like some advice on how to set event handlers for the jQuery Autocomplete Combox: http://jqueryui.com/demos/autocomplete/#combobox. Code examples from the jQuery doc are as per below: // Supply a callback function to handle the select event as an init option. $( ".selector" ).autocomplete({ select: function(event, ui) { ... } }); // Bind to the select event by type: autocompleteselect. $( ".selector" ).bind( "autocompleteselect", function(event, ui) { ... }); I have tried this - as

问题 I am working on a program in which a combobox's options are dependent on another combobox's selected option. The selected item from the first combobox chooses which options are in the second combobox. Does anyone know how to do this? This is the button that adds the information to the first combobox try { CustomerAccount aCustomerAccount = new CustomerAccount(txtAccountNumber.Text, txtCustomerName.Text, txtCustomerAddress.Text, txtPhoneNumber.Text); account.Add(aCustomerAccount); cboClients

问题 I have ~50 cascading comboboxes on a form that I want to autofill if only one option is left. I found some code that worked for cboTwo (second combobox), but the other comboboxes aren't filling in automatically. I still have to use the drop down menu to make a selection. Is there any way that I can make all of my comboboxes autofill if there is only one option left in the drop down? I'd prefer some sort of macro help because that's what I've been using until now, but I'll use VBA if necessary

问题 my code returns error saying violation of PRIMARY KEY constraint 'PK_tblOfficeEquipmentProfile'. Cannot insert duplicate key in object 'tblOfficeEquipmentProfile'. This is my code: Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click Dim sqlconn As New SqlClient.SqlConnection sqlconn.ConnectionString = "server = SKPI-APPS1;" & _ "Database = EOEMS;integrated security=true" Dim myCommand As SqlCommand 'parametrized update sql command

问题 I have a namespace in which I have declared an enum as follows: namespace IXMSoft.Business.SDK.Data { using System; public enum BaudRate { BR115200 = 7, BR19200 = 4, BR230400 = 8, BR2400 = 1, BR38400 = 5, BR4800 = 2, BR57600 = 6, BR9600 = 3 } } When I retrieve these values in a combo box, which is in another namespace, using the statement comboBox1.Items.Add(BaudRate.BR5700); it shows the value as for example "BR5700" I want to remove BR in front and just want to display the value as "5700" .