How to create multiple code behind file for .aspx page

I have a situation where I need to create multiple code behind files for a single .aspx page in c# asp.net. Actually I have a web form on that huge coding is done and I need multiple developer’s working on it simultaneously. How can I achieve the same?

Here is the code snippet I tried

Class 1 MyPartialClass.cs

namespace WebApplication1
{
    public partial class Default : System.Web.UI.Page
    {
        protected void PrintText(string pt)
        {
            Response.Write(pt);
            //lblTest.Text = pt;    //Can not access this label in partial class.
        }
    }
}

Class 2 which is Default.aspx.cs

namespace WebApplication1
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            PrintText("Hello World");
        }
    }
}

and my HTML source

<%@ Page Language="C#" AutoEventWireup="false" CodeBehind="Default.aspx.cs" Inherits="WebApplication1.Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="lblTest" runat="server"></asp:Label>
    </div>
    </form>
</body>
</html>

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Answers:

Method 1

Method 2

Method 3

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

ASP.NET will always generate your code behind files as partial classes

namespace WebApplication1
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
    }
}

You can therefor separate the code behind in different files, if you pertain the definition as partial and keep the class under the same namespace.

Edit : The Web Project

//Default.aspx
<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master"     AutoEventWireup="true"
    CodeBehind="Default.aspx.cs" Inherits="WebApplication1.Default" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <asp:Label ID="lblTest" runat="server" Text="Label"></asp:Label>
</asp:Content>

//Default.aspx.cs
namespace WebApplication1
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            PrintText("Hello World");
        }
    }
}

//MyPartialClass.cs
namespace WebApplication1
{
    public partial class Default
    {
        protected void PrintText(string pt)
        {
            Response.Write(pt);
            lblTest.Text = pt;    //lblTest is accessible here
        }
    }
}

I haven’t modified any other generated files. One thing I like to mention is that the Default.aspx.cs file that has been generated was generated with the class name “_Default”. I have changed it to Default and Visual Studio refactored the change across all files that contain a definition for that class, except the Default.aspx file, where I had to manually modifiy from Inherits="WebApplication1._Default" to Inherits="WebApplication1.Default".

Edit 2:

I kept searching the internet, and according to http://codeverge.com/asp.net.web-forms/partial-classes-for-code-behind/371053, what you are trying to do is impossible. Same idea is detailed at http://codeverge.com/asp.net.web-forms/using-partial-classes-to-have-multiple-code/377575
If possible, consider converting from Web Site to Web Application, which supports what you are trying to achieve. Here is a walkthrough on how to perform this conversion: http://msdn.microsoft.com/en-us/library/vstudio/aa983476(v=vs.100).aspx

Method 2

You need to set up a source safe server in order to that, like Team Foundation Server.

Method 3

You can easily just add partial classes to your code.

http://www.codeproject.com/Articles/709273/Partial-Classes-in-Csharp-With-Real-Example

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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