checkboxlist

问题 I have some items in a checked list box, I want to disable the checkbox of first item in it. i.e. I want to disable the first item in the CheckedListBox, because I want to tell the user visually that option is not available. 回答1: Combining 2 of the above partial answers worked great for me. Add your items to the list with: myCheckedListBox.Items.Add(myItem, myState); Where myState is CheckState.Indeterminate for items that should be disabled. Then add an event handler to keep those items from

问题 I've got a CheckBoxList control that I want to require the user to check at least ONE box, it does not matter if they check every single one, or 3, or even just one. In the spirit of asp.net's validation controls, what can I use to enforce this? I'm also using the Ajax validation extender, so it would be nice if it could look like other controls, and not some cheesy server validate method in the codebehind. <asp:CheckBoxList RepeatDirection="Horizontal" RepeatLayout="Table" RepeatColumns="3"

问题 I've writen some code here: http://jsfiddle.net/anhtran/kXsj9/8/ Users have to select at least 1 option on the group. But it makes me must click all of them to submit the form. How to do this issue without javascript? Thanks for any help :) 回答1: I think this html5 attribute is only supposed to define which fields are required. You cant put logic in to say "at least one is required". You will need to add custom javascript for this to work (and/or have validation on the server side). hope this

问题 ASP.NET and C#. I'd like to have a CheckboxList with a "Select All" item. When this particular item is selected, all others will be selected too. When selection is removed from this item, so too will it be from all others items. Checking/Unchecking of any other items will only have an effect on that particular item regardless of the selection state of "Select All" item. I am looking for a jquery solution to this. Here is the databinding code in my codebehind: IList<Central> Centrals = new

问题 I'm probably a idiot here but I'm having problems getting the value of whether or not a checkbox is checked/selected or not. Here's what I've got so far: In my Model: public IEnumerable<SelectListItem> Insurers { get { var list = new List<SelectListItem>(); string zInsurersList = "Age UK,Be Wiser,Call Connection,Churchill,Sainsbury's,Direct Line,Hastings Direct,LV=,Nationwide,RIAS,Swinton"; string[] zInsurers = zInsurersList.Split(','); foreach (string aInsurer in zInsurers) { list.Add(new

问题 I have a CheckBoxList dinamically filled from DB. <asp:CheckBoxList ID="chklist1" runat="server" onclick="chklist1_onclick()" /> Oce it has been filled I have several options and one of them has the text "No Response". What I want is a javascript function that does the following: 1) If I check "No Response" all other options must be unchecked. 2) If I check at least one of the options that is not "No Response", the "No Response" option must be unchecked. Hope to be clear. Thanks in advance.

问题 Good day friends, I got to know how we can make two checkboxes or checkboxes inside a checkbox list mutually exclusive. However my question is little different from that, Hope to get some help from stack overflow, Well I have two checkbox lists, as follows and from a dataset table I am getting the check box values, CheckBoxlist1 - Checkbox_selectColumns if (IsDataSetNotEmpty(ds)) { CheckBox_selectColumns.Items.Clear(); foreach (DataRow row in ds.Tables[0].Rows) { CheckBox_selectColumns.Items

问题 I have referred this question to learn how to post the checkbox selected values in the database. However, I am not able to get my selected values on debug because of a NullReferenceException (see snapshots below) . Here is my code: Model: public class ProductModel { public string ProductId { get; set; } public string ProductName { get; set; } public bool Selected { get; set; } public string[] CheckedColumn { get; set; } } View: @model IEnumerable<DemoApp.Models.ViewModels.ProductModel> @{

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . When I checked the CheckBoxList Items the dynamic texboxes are added. But on Unchecked I want to remove particular textboxes. The code is working fine for adding textboxes but gives me exception at removing.Any Help will be great. My Code: iy = 0; private void checkedListBox_SelectedIndexChanged(object sender,

问题 So I have this Checkboxlist and I want to implement a Select All feature for the elements inside it. I placed it inside an UpdatePanel, but everytime I click an item, the entire page is reloaded. This is my code: <asp:UpdatePanel ID="CBLPanel" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="false"> <ContentTemplate> <div class="LeftAligned"> <asp:Label ID="FilterLabel" runat="server" Text="Filter by:" /> <asp:DropDownList runat="server" ID="FilterDDL" AutoPostBack="true"