How to Close LoginForm & Show Main Form in C# without Hiding LoginForm

Question

0.00/5 (No votes)

See more:

Hi All,

I was wondering how to write my C# program to Close Login Form and Show Main Form. Simply I could use Hide method for Login Form. But the Problem is, Even I close Main Form. Program doesn't Exit. to over come this issue I found a solution. I don't know whether It is good programing practise. because I'm totally new to C# and programming world.

My Solution is.

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Close_Last_Form
{
    static class Program
    {  
       //Create a variabel to store result
       public static DialogResult rslt;

        //create a property to assign values to the rslt variable
        public static DialogResult rsltt
        {
            get
            {
                return rslt;
            }
            set
            {
                rslt = value;
            }
        }


        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
           Application.Run(new Form1());

            //according to the rslt Open Form2 or Exit the application
            if (DialogResult.OK  == rslt)
            {
                Application.Run(new Form2());
            }
            else
            {
                Application.Exit();
            }

        }
    }
}

In my Form1. there is a button to goto the Form2. code on that Form is

C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Close_Last_Form
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //tells the Program class I'm successfull to show form2
            Program.rsltt = DialogResult.OK;
            
            Form2 Form2 = new Form2();
            Form2.Show();
            this.Close();     
        }
    }
}

I need a piece of advice from an Expert, Is this code ok to use in a program.
Thanks.

Posted 14-Jul-14 18:46pm

Nipuna S Perera

Updated 1-Aug-21 4:11am

Add a Solution

Comments

Prasad Avunoori 15-Jul-14 0:51am

This looks good!

Nipuna S Perera 5-Aug-14 9:19am

Thanks for your Kind response

jo.him1988 15-Jul-14 1:22am

or you can write this without initialize extra property

Nipuna S Perera 5-Aug-14 9:20am

how can I do it. If you can explain, It would be great help for me

3 solutions

Solution 3

It is actually simpler than it looks.

You just need to add a code line in Main Form (Form 2 in the below given example)

Supposing We have 2 Forms Form 1 and Form 2.
Form 1 is Login Form and Form 2 is Main Form.

Pass your Parameters to open Form 2 as normally be done.

In Form 2, go to FormClosing Event and add this line.

Application.ExitThread();

Mark this as an answer if it helps. :)

Happy coding

Posted 1-Aug-21 4:11am

M.A Ehsan

Comments

Richard MacCutchan 1-Aug-21 10:24am

This was solved seven years ago. Please try and focus on current unanswered questions.

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)

jo.him1988 · Accepted Answer · 2014-07-14T19:22:00

Program.cs

C#

static void Main()
      {
          Application.EnableVisualStyles();
          Application.SetCompatibleTextRenderingDefault(false);
         Application.Run(new Form1());
 }

Form1.cs

           private void button1_Click(object sender, EventArgs e)
        {  this.Hide();
        Form2 form2 = new Form2();
            if (form2.ShowDialog() != DialogResult.OK)
                Application.Exit();
}

Anand Gunasekaran · Accepted Answer · 2014-07-14T23:12:00

in Program.cs

C#

static void Main()
       {
           Application.EnableVisualStyles();
           Application.SetCompatibleTextRenderingDefault(false);
          Application.Run(new frmMain());
          
       }

in Main form

C#

private void frmMain_Load(object sender, EventArgs e)
{
frmLogin frml=new frmLogin();
frml.ShowDialog();
}

in login form:

C#

private void btnLogin_Click(object sender, EventArgs e)
{
if(txtUserName.Text=="admin" && txtPassword.Text=="pass")
{
MessageBox.Show("Login Successful");
this.Close();
}
else
{
MessageBox.Show("Login Failed");
Application.Exit();

}
}

How to Close LoginForm & Show Main Form in C# without Hiding LoginForm

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0