What is exactly wrong with this ASP.NET and javascript code? !

Question

0.00/5 (No votes)

See more:

Can anyone solve this? it keeps telling me there is an error in line 32 ( the asp:Button Line), "CS1061: 'webform1_aspx' does not contain a definition for 'submitButtonClick' and no accessible extension method 'submitButtonClick' accepting a first argument of type 'webform1_aspx' could be found (are you missing a using directive or an assembly reference?"

Here is the Code:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebTest1.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Test</title>
    <script type="text/javascript" language="JScript">
        function submitButtonClick(sender: Object, events: EventArgs): void {
            if (IsPostBack) {
                if (iceCream.SelectedItem == "Yes") {
                    message.Text = name.Text + " Likes ice cream!";
                }
                else {
                    message.Text = name.Text + " Does not like ice cream!";
                }
            }
        }

    </script>
</head>
<body>
    <form id="form1" method="post" runat="server">
        name: <asp:TextBox ID="name" runat="server" />
        <br />
        Do you like icecream?
        <asp:RadioButtonList ID="iceCream" runat="server" >
        <asp:ListItem>Yes</asp:ListItem>
        <asp:ListItem>No</asp:ListItem>
        </asp:RadioButtonList>
        <br />
        <asp:Button text="submit" runat="server" onClick="submitButtonClick" />
        <br />
        <center>
           <h1> <asp:Label ID="message" runat="server"></asp:Label></h1>
        </center>
      
    </form>
</body>
</html>

What I have tried:

I tried everything< i've been trying for hours now with no luck, anyone knows the answer??

Posted 4-Feb-23 5:37am

ُSpecter 2023

Updated 4-Feb-23 6:38am

Add a Solution

1 solution

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)

Dave Kreskowiak · Accepted Answer · 2023-02-04T06:38:00

The onClick attribute in the asp:Button element is telling the control what method in your backing C# code to call, NOT YOUR JAVASCRIPT!

The asp: elements are executed on the server to generate HTML elements. The postback will be executed in the C# code, NOT YOUR JAVASCRIPT!

You have to change the code to work as C#. Also, the IceCream.SelectedItem cannot be compared to a string. You have to compare the SelectedItem.Text property to a string instead.
This updated code should work:

ASP.NET

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebFormsTest.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Test</title>
    <script language="C#" runat="server">
        void submitButtonClick(Object sender, EventArgs e)
        {
            if (IsPostBack) {
                if (IceCream.SelectedItem.Text == "Yes")
                {
                    message.Text = name.Text + " Likes ice cream!";
                }
                else
                {
                    message.Text = name.Text + " Does not like ice cream!";
                }
            }
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
        name: <asp:TextBox id="name" runat="server" />
        <br />
        Do you like icecream?
        <asp:RadioButtonList id="IceCream" runat="server" >
        <asp:ListItem>Yes</asp:ListItem>
        <asp:ListItem>No</asp:ListItem>
        </asp:RadioButtonList>
        <br />
        <asp:Button text="submit" runat="server" onClick="submitButtonClick" />
        <br />
        <center>
           <h1><asp:Label id="message" runat="server"></asp:Label></h1>
        </center>    
    </form>
</body>
</html>

If you want to change this code to work with javascript instead, you're going to have to rework just about everything. Typically, you wouldn't use the server-side controls (everything that starts with asp:).