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https://www.codeproject.com/articles/15505/asp-net-dropdownlist-with-optiongroup-support
Sep 07, 2006 · One such notable omission is that of OptionGroup (<optgroup>) support in the DropDownList control. For those unfamiliar with the <optgroup> element, it is part of the XHTML standard, and has the effect of categorising items in a <select>, as the following image shows.4.8/5(39)
https://stackoverflow.com/questions/6688682/asp-net-mvc-3-optgroup-support-in-html-dropdownlistfor
Support for optgroups was added to ASP.Net MVC at version 5.2. The Group property on SelectListItem allows you to specify a group for each item:. New SelectList constructors also allow you to provide the name of the field that contains the group title on the supplied list of items.. The HtmlHelper DropDownList and DropDownListFor methods now generate optgroup elements based on the groups ...
http://www.kashyapas.com/2014/06/09/html-ldquooptgrouprdquo-support-in-dropdownlist-asp-net-mvc-5-2/
Jun 09, 2014 · Prior to ASP.NET MVC 5.2 we were not able to add the optgroup by using the DropDownList wrapper & SelectList/MultiSelectList object. The select list objects were providing only the feature of selected value when creating a DropDownList. With this bug fix in ASP.NET 5.2 RC, we will be able to get the optgroup support when creating a DropDownList.
https://www.codeproject.com/articles/24594/dropdownlist-with-support-for-the-optgroup-element
Mar 24, 2008 · If you are familiar with the System.Web.UI.WebControls.DropDownList control (and you should be when reading this article), you probably know its functionality and behavior. Here are listed some important and commonly used capabilities that my control has in …2.3/5(11)
https://weblogs.asp.net/jeff/dropdownlist-with-optgroup
Dec 27, 2006 · Many moons ago, I asked if anyone else thought it was strange that there was no way to add optgroups to the DropDownList.I've seen a number of solutions, including those involving control adapters, but I wanted to make something a little more simple, if hackish, for the old toolbox.
https://forums.asp.net/t/977484.aspx?DropDownList+with+optgroup+tags+
Jun 25, 2009 · I've done some unsuccessful searching around for implementing a dropdownlist with having the <optgroup> tags incorporated within it. Just wondering if anybody has implemented this, or had any ideas on how to accomplish it.
http://www.ashishblog.com/group-in-dropdownlist-using-jquery-c/
Sep 30, 2015 · Group optgroup > in DropDownList using jQuery C#. In this article I‘ll show you how to create groups in the ASP.NET DropdownList control using JQuery. In this example we are using JQuery’s native support for wrapping elements into other elements with the help of wrapAll() method. It takes only 1 line of code and we can have the groups ...
https://html.com/tags/optgroup/
Grouping List Options. The optgroup element is used to group options in a drop-down list, with the aim of making the list easier to navigate. The functionality essentially splits large numbers of <option> items into small sections. Note that the label attribute is required, and will be rendered as the first item in the section. The user cannot select the label as a choice.
https://weblogs.asp.net/ricardoperes/asp-net-dropdownlist-with-groups
ASP.NET DropDownList With Groups. Saturday, February 2, 2013.NET ASP.NET Controls Tag Mapping Web. A long time ago I submitted a request to the ASP.NET team for having the standard DropDownList support HTML’s optgroup tag: ... so I can add support for it on all of the already declared DropDownLists. I wanted to support the two basic scenarios:
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