Issues with ASP.net CSS not functioning properly in Internet Explorer, although it works fine in Firefox, Edge, and

Hello everyone,

After spending several hours debugging and researching, I have hit a roadblock and can't identify the issue.

As a less experienced coder, I am reaching out to seek your help.

I am currently working on an ASP.NET C# page that was created from a modified Visual Studio template.

While everything functions flawlessly in all browsers during testing in Visual Studio, after publishing to IIS, Internet Explorer stops working (other browsers are unaffected).

Here is an excerpt from my master page:

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site.master.cs" Inherits="Aanmelding.SiteMaster" %>
<!DOCTYPE html>
<html lang="en">
<head runat="server">
    <meta charset="utf-8" />
    <title>Portaal</title>
    <asp:PlaceHolder runat="server">     
          <%: Scripts.Render("~/bundles/modernizr") %>
    </asp:PlaceHolder>  
    <webopt:BundleReference runat="server" Path="/Content/css" /> 
    <link href="~/favicon.ico" rel="shortcut icon" type="image/x-icon" />
    <meta name="viewport" content="width=device-width" />
    <asp:ContentPlaceHolder runat="server" ID="HeadContent" />
    </head>

Below is a snippet from my page:

<%@ Page Title="Portaal" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Aanmelding._Default" %>

<asp:Content runat="server" ID="FeaturedContent" ContentPlaceHolderID="FeaturedContent">
    <section class="featured">
        <div class="content-wrapper">
            <hgroup class="title">
                <h1>Welkom. </h1>      
            </hgroup>            
        </div>
    </section>

Lastly, here are some snippets from my CSS:


<!-- Your CSS code here -->

Any assistance would be greatly appreciated!

Answer №1

Several CSS3 capabilities, such as rounded borders, might not be compatible with Internet Explorer 8 and earlier versions. It is recommended to use Internet Explorer 10 or a later version for better support.

Answer №2

After some investigation, I managed to identify the issue. Upon accessing my website, I noticed that Internet Explorer 11 was defaulting to compatibility mode for IE7. I decided to delve into the developer mode and changed the document mode to 11, and voila, the problem was resolved instantly. All it took was adding the following line to my master page:

<meta http-equiv="X-UA-Compatible" content="IE=8" />

After a quick refresh, everything was functioning perfectly.

A big thank you to everyone for their assistance!

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