{"id":15687,"date":"2022-10-12T14:52:56","date_gmt":"2022-10-12T09:22:56","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-highlight-a-row-of-multiple-list-boxes-on-hover-in-asp-net\/"},"modified":"2022-10-12T14:52:56","modified_gmt":"2022-10-12T09:22:56","slug":"solved-how-to-highlight-a-row-of-multiple-list-boxes-on-hover-in-asp-net","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-highlight-a-row-of-multiple-list-boxes-on-hover-in-asp-net\/","title":{"rendered":"[Solved] How to highlight a row of multiple list boxes on hover in asp.net?"},"content":{"rendered":"

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You can set selected item of any listbox using C# since asp.net ListBox can be made to post back when an item is selected by setting AutoPostback =”true” in ListBox markup. Note that hovering over an item in Listbox will not cause a postback, so you cannot use C# for your hover requirement.<\/p>\n

So, your situation would need C# as well as jQuery\/JavaScript. <\/p>\n

The option element hover event is captured using jQuery, while selected index changed is captured on server-side using C#. Sample aspx page that you can run on your end is given below. In hover event, I am using a class called hoverClass<\/code> defined in the page to control hover appearance. <\/p>\n

NOTE: The selected item appearance is not possible to customize through CSS since all browsers apply their own CSS of background color to selected option.<\/p>\n

Assumption<\/strong><\/p>\n

I have assumed that when you hover\/select an item in any one of the listboxes then an item with same index in other list box gets selected\/hovered. This works in Chrome, Opera FireFox and Edge browsers.<\/p>\n

You can see a video of how this sample page behaves at this url: Video of how page behaves<\/a><\/p>\n

Sample aspx page with jQuery and C# code<\/strong><\/p>\n

<%@ Page Language=\"C#\" AutoEventWireup=\"true\" %>\n\n<!DOCTYPE html>\n<script runat=\"server\">\n\n    protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)\n    {\n        \/\/select the same index in other ListBox\n        ListBox2.SelectedIndex = ListBox1.SelectedIndex;\n    }\n\n    protected void ListBox2_SelectedIndexChanged(object sender, EventArgs e)\n    {\n        \/\/select the same index in other ListBox\n        ListBox1.SelectedIndex = ListBox2.SelectedIndex;\n    }\n<\/script>\n\n\n<html xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\">\n<head runat=\"server\">\n    <title>Wrtap text in ListBox<\/title>\n    <style>\n        select[id*='ListBox1'] option {\n            white-space: normal;\n            \/*min-height:40px;*\/\n        }\n\n        .hoverClass {\n            background-color: pink !important;\n        }\n    <\/style>\n    <script src=\"https:\/\/ajax.googleapis.com\/ajax\/libs\/jquery\/3.2.1\/jquery.min.js\"><\/script>\n<\/head>\n<body>\n    <form id=\"form1\" runat=\"server\">\n        <div>\n            <asp:ListBox ID=\"ListBox1\"\n                Rows=\"6\"\n                Width=\"150px\" AutoPostBack=\"true\"\n                SelectionMode=\"Single\" OnSelectedIndexChanged=\"ListBox1_SelectedIndexChanged\"\n                runat=\"server\">\n                <asp:ListItem>Item 1 dsdds  sdsdsdsd sdsd sdsd sds xyz<\/asp:ListItem>\n                <asp:ListItem>Item 2<\/asp:ListItem>\n                <asp:ListItem>Item 3 gfgf kgkgkg kgkkg abc<\/asp:ListItem>\n                <asp:ListItem>Item 4<\/asp:ListItem>\n                <asp:ListItem>Item 5<\/asp:ListItem>\n                <asp:ListItem>Item 6<\/asp:ListItem>\n            <\/asp:ListBox>\n        <\/div>\n        <div>\n            <asp:ListBox ID=\"ListBox2\"\n                Rows=\"6\"\n                Width=\"150px\" AutoPostBack=\"true\"\n                SelectionMode=\"Single\" OnSelectedIndexChanged=\"ListBox2_SelectedIndexChanged\"\n                runat=\"server\">\n                <asp:ListItem>Value 1<\/asp:ListItem>\n                <asp:ListItem>Value 2<\/asp:ListItem>\n                <asp:ListItem>Value 3 gfgf kgkgkg kgkkg abc<\/asp:ListItem>\n                <asp:ListItem>Value 4<\/asp:ListItem>\n                <asp:ListItem>Value 5<\/asp:ListItem>\n                <asp:ListItem>Value 6<\/asp:ListItem>\n            <\/asp:ListBox>\n        <\/div>\n        <script type=\"text\/javascript\">\n            $(document).ready(function () {\n                \/\/set size option for each select element since its needed for hover to fire\n                $(\"select\").each(function () {\n                    this.setAttribute(\"size\", this.options.length);\n                });\n\n                \/\/select option hover event\n                $(\"select option\").hover(function (e) {\n                    \/\/remove  special hover classes from option elements\n                    $(\"select option\").each(function () {\n                        $(this).removeClass(\"hoverClass\");\n                    });\n\n                    \/\/get option being hovered\n                    var hoveredOption = $(e.target);\n\n                    \/\/style hovered option\n                    if (hoveredOption.is('option')) {\n                        hoveredOption.addClass(\"hoverClass\");\n                    }\n\n                    \/\/get the other listbox \n                    var otherListBox = null;\n                    if (hoveredOption.parent().prop(\"id\").indexOf(\"ListBox1\") >= 0) {\/\/you hovered over first list box\n                        otherListBox = $(\"#<%=ListBox2.ClientID%>\");\n                } else if (hoveredOption.parent().prop(\"id\").indexOf(\"ListBox2\") >= 0) {\/\/you hovered over second list box\n                    otherListBox = $(\"#<%=ListBox1.ClientID%>\");\n                }\n\n                \/\/style the same index option in other ListBox with hover style \n                if (otherListBox && hoveredOption[0].index < otherListBox[0].options.length) {\n                    $(otherListBox[0].options[hoveredOption[0].index]).addClass(\"hoverClass\");\n                }\n                });\n            });\n\n\n        <\/script>\n    <\/form>\n<\/body>\n<\/html>\n<\/code><\/pre>\n<\/p><\/div>\n
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            3<\/span> <\/p><\/div>\n<\/div>\n
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solved How to highlight a row of multiple list boxes on hover in asp.net? <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] You can set selected item of any listbox using C# since asp.net ListBox can be made to post back when an item is selected by setting AutoPostback =”true” in ListBox markup. Note that hovering over an item in Listbox will not cause a postback, so you cannot use C# for your hover requirement. So, … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[751,324,464],"class_list":["post-15687","post","type-post","status-publish","format-standard","hentry","category-solved","tag-asp-net","tag-c","tag-css"],"yoast_head":"\n[Solved] How to highlight a row of multiple list boxes on hover in asp.net? - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-highlight-a-row-of-multiple-list-boxes-on-hover-in-asp-net\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to highlight a row of multiple list boxes on hover in asp.net? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You can set selected item of any listbox using C# since asp.net ListBox can be made to post back when an item is selected by setting AutoPostback =”true” in ListBox markup. 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