How to call a code behind from a client side in ASP.NET

Question

0.00/5 (No votes)

See more:

Hello i'm trying to call this method in the client side but how can i do that?

public string codeBehind()
       {
           string htmlStr = "";
           SqlConnection thisConnection = new SqlConnection(dbConnection);
           SqlCommand thisCommand = thisConnection.CreateCommand();
           thisCommand.CommandText = "SELECT * from tableTest";
           thisConnection.Open();
           SqlDataReader reader = thisCommand.ExecuteReader();

           while (reader.Read())
           {
               int id = reader.GetInt32(0);
               string Name = reader.GetString(1);
               string Pass = reader.GetString(2);
               htmlStr += "<tr><td>" + id + "</td><td>" + Name + "</td><td>" + Pass + "</td></tr>";
           }

           thisConnection.Close();
           return htmlStr;
       }

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

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server" >
    <table width="100%" align="center" cellpadding="2" cellspacing="2" border="0" bgcolor="#EAEAEA">
        <tr align="left" style="background-color:#004080;color:White;" >
            <td> ID </td>                        
            <td> Name </td>            
            <td>Pass</td>                        
        </tr>

    -----> code behind supposed to be here

    </table>
    </form>
</body>
</html>

What I have tried:

i tried call my method using this

<%Response.Write(codeBehind())%>

and or this

<%=codeBehind()%>

but for some reason it can't be detected am i missing something?

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

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server" >
    <table width="100%" align="center" cellpadding="2" cellspacing="2" border="0" bgcolor="#EAEAEA">
        <tr align="left" style="background-color:#004080;color:White;" >
            <td> ID </td>                        
            <td> Name </td>            
            <td>Pass</td>                        
        </tr>

    <%Response.Write(codeBehind())%>

    </table>
    </form>
</body>
</html>

Posted 2-Oct-19 16:12pm

Reden Rodriguez

Updated 2-Oct-19 23:19pm

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)

F-ES Sitecore · Accepted Answer · 2019-10-02T23:20:00

Solution 1

You should just need

<%=codeBehind()%>

if it can't find the codeBehind method then you probably don't have that method on the code-behind class as defined in the "Page" directive at the top, or the "Inherits" attribute doesn't match the namespace and class in that code-behind file.

Posted 2-Oct-19 23:20pm

F-ES Sitecore

Updated 2-Oct-19 23:23pm

v2

Comments

Reden Rodriguez 3-Oct-19 5:56am

I just created a new web form but it's always like that

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Test.aspx.cs" Inherits="WebApplication3.Test" %>

using System;
using System.Web.UI;

namespace WebApplication3
{
public partial class Test : Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
public string codeBehind()
{
string htmlStr = "";
SqlConnection thisConnection = new SqlConnection(dbConnection);
SqlCommand thisCommand = thisConnection.CreateCommand();
thisCommand.CommandText = "SELECT * from tableTest";
thisConnection.Open();
SqlDataReader reader = thisCommand.ExecuteReader();

while (reader.Read())
{
int id = reader.GetInt32(0);
string Name = reader.GetString(1);
string Pass = reader.GetString(2);
htmlStr += "" + id + "" + Name + "" + Pass + "";
}

thisConnection.Close();
return htmlStr;
}
}
}

F-ES Sitecore 3-Oct-19 6:03am

Is the method being called ok? If you put a breakpoint in it and debug, does the breakpoint get hit? Either the code is running but is returning an empty string, or the code isn't running due to something about your project set-up.

Reden Rodriguez 3-Oct-19 6:20am

i can't run it because of the error that the method doesn't exist but it exist and the client side can't even detect it, btw i put my experiment code in my buddy's work and it goddamn work and i tried to create a new web form in his work and we got the same error again, and tried it in my past works and just insert the code in the client side and the code behind and it works but for some reason whenever i create a new webform or application it can be detected.

Reden Rodriguez 3-Oct-19 9:05am

i finally get it now, my visual studio sucks haha, first i commented all my code the lunch the webapplication and i uncomment all my codes and it works hahaha

F-ES Sitecore 3-Oct-19 9:17am

Glad you got it sorted in the end :)

Richard Deeming 3-Oct-19 9:25am

I hope the variable name Pass doesn't mean you're storing passwords in the database?

Reden Rodriguez 3-Oct-19 20:21pm

it's just a little experiment, i was just curious if i can use table instead the usual gridview. :)

Reden Rodriguez 3-Oct-19 6:05am

i even create a new web application and it is always like that.