checkedlistbox

问题 Alright, so i have a problem with my programming, i have three checkedlistboxes, one called " lstShows " 2nd is called " lstSeasons " and third is called " lstEpisodes " and i have two comboboxes that have seasons and episodes in them, one combobox is called " cbSeasons " and 2nd is called " cbEpisodes . so what i'm trying to do is, when i press on an item in lstshows , i want to be able to assign to it items from lstSeasons , and when i want to click on an item in seasons i want to be able

问题 This question already has answers here : No ItemChecked event in a CheckedListBox? (4 answers) Closed 3 years ago . I want to enable a button only if valid criteria have first been selected (C# Windows Forms app). I have this code (I tried the IndexChanged and ValueChanged events first, but this answer indicates the ItemCheck event is the one to monitor: private void checkedListBoxUnits_ItemCheck(object sender, ItemCheckEventArgs iceargs) { buttonGenRpts.Enabled = ValidSelections(); } private

问题 I have a checkedListBox with 5 CheckBoxes, and I want the first one to be "All". I wrote down this code but i'm getting an endless loop: private void chkLstBx_ItemCheck(object sender, ItemCheckEventArgs e) { // ----- Get the name of the CheckBox that's changed: ----- string selected = chkLstBx.SelectedItem + ""; // ----- If "All" changed: ----- if (selected.Equals("All")) // ----- to TRUE(from unchecked): ----- if (("" + (chkLstBx.GetItemCheckState(0))).Equals("Unchecked")) for (int i = 1; i

问题 I am trying to set tab stops in a CheckedListBox in my WinForms application, but no matter what I do, it does not seem to have any effect. I have the following in the code for my form: <DllImport("user32.dll")> _ Public Sub SendMessage(ByVal hWnd As IntPtr, ByVal uMsg As Int32, ByVal wParam As Int32, ByRef lParam As Int32) End Sub Public Const LB_SETTABSTOPS As Int32 = &H192 And in the form's load method, I am doing the following, where theList is my CheckedListBox: Dim tabStops() As Integer

问题 I want to change the color of the items that are chedked in the CheckedListBox in C# WindowsForms. Can any one help me to solve this problem! 回答1: This should get you started. I've subclassed a CheckedListBox and overridden the drawing event. The result is all checked items in the list are drawn with a red background. From playing around with this, if you want the area behind the checkbox to be a different colour as well, use e.Graphics.FillRectangle before calling base.OnDrawItem . class

问题 The DataSource property on a CheckedListBox is hidden from Intellisense. Why? You can use the binding properties to make it work, but I'm worried that it's hidden for a reason and that I shouldn't be databinding on a CheckedListBox for some important reason that I'm not aware of. Is databinding on a CheckedListBox ok?? 回答1: The CheckedListBox is intended to be used with its Add and AddRange methods: To add objects to the list at run time, assign an array of object references with the AddRange

问题 I have a CheckedListBox and I would like to check all the items that are in another List. This code does not work since the CheckedItems property is read-only and the types do not match, but it gives the best idea of what I want to do. checkedListBox1.DataSource = DataSetSelectAll().Tables[0]; checkedListBox1.ValueMember = "id_table"; checkedListBox1.DisplayMember = "name"; List<tableClass> list = MyCheckedList(); checkedListBox1.CheckedItems = list; I know this is wrong but do not know how

问题 I've never dealt with checkedListBox1 until now. A program that I want to make will benefit from using it rather than having to use numerous Checkboxes. I have the code: private void checkedListBox1_SelectedIndexChanged(object sender, EventArgs e) { int selected = checkedListBox1.SelectedIndex; this.Text = checkedListBox1.Items[selected].ToString(); } The problem with this is that each time I click on the box and it highlights, it then selects the highlighted object. What I am looking for is

问题 I know how to remove a single checkedItem from checkedlistbox . But now, I want to remove all the checked items in one go. I tried this: foreach (var item in List_Frente.CheckedItems) { List_Frente.Items.Remove(item); } But as you probably know, it gives me an error,saying that, List that this enumerator is bound to has been modified. An enumerator can only be used if the list does not change. How may I remove all checkeditems with a single click ? 回答1: you could do something like this:

问题 I have a CheckedListBox bound to a DataTable . Now I need to check some items programmatically, but I find that the SetItemChecked(...) method only accepts the item index. Is there a practical way to get an item by text/label, without knowing the item index? (NOTE: I've got limited experience with WinForms...) 回答1: You can implement your own SetItemChecked(string item); private void SetItemChecked(string item) { int index = GetItemIndex(item); if (index < 0) return; myCheckedListBox