Asp.net listbox not working

Question

0.00/5 (No votes)

See more:

Hey there, I'm running a visual studio ASP.NET Core web application project and I'm trying to use the listBox to let users select multiple elements. The problem is that when I run my application instead of a listbox I get something like this. Activity: Run Walk Hike instead of a proper listbox

my cshtml

  Activity: 
        <asp:listbox id="activites" name="activities" runat="server" selectionmode="Multiple" row="1" set="" autopostback="true">
                <asp:listitem>Run
                <asp:listitem>Walk
                <asp:listitem>Hike

Update: even when i take an example of the asp.net attribute website it doenst work

cshtml
<pre> <asp:ListBox id="ListBox1" 
           Rows="6"
           Width="100px"
           SelectionMode="Single" 
           runat="server">

         <asp:ListItem>Item 1</asp:ListItem>
         <asp:ListItem>Item 2</asp:ListItem>
         <asp:ListItem>Item 3</asp:ListItem>
         <asp:ListItem>Item 4</asp:ListItem>
         <asp:ListItem>Item 5</asp:ListItem>
         <asp:ListItem>Item 6</asp:ListItem>

      </asp:ListBox>

:

output:

Item 1 Item 2 Item 3 Item 4 Item 5 Item 6

What I have tried:

I have tried a few differant things and I have the @addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers in my code

Posted 8-Jun-23 8:37am

caitlin wardle 2023

Updated 9-Jun-23 2:51am

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Graeme_Grant · Answer 1 · 2023-06-09T02:51:00

Solution 2

If your output is

Item 1 Item 2 Item 3 Item 4 Item 5 Item 6

Then you need to apply CSS Styling.

Posted 9-Jun-23 2:51am

Graeme_Grant

Dave Kreskowiak · Answer 2 · 2023-06-08T10:13:00

If what you posted is exactly what you have in your cshtml, you don't have any closing tags on these elements. You have opening tags, but no closing tags.

CSHTML

<asp:ListBox id="activites" name="activities" runat="server" selectionmode="Multiple" row="1" set="" autopostback="true">
    <asp:ListItem>Run</asp:ListItem>
    <asp:ListItem>Walk</asp:ListItem>
    <asp:ListItem>Hike</asp:ListItem>
</asp:ListBox>