Here I will explain how to open a second from using a first form in Windows Forms. Before that I will explain group boxes and picture boxes in Windows Forms.
Step 1: Login form
There is a login from when I enter a password and username and then the page goes directly to another page named form2.
![Login from]()
Step 2: Add a new form
Now go to Solution Explorer and select your project and right-click on it and select a new Windows Forms form and provide the name for it as form2.
![Add a new form]()
And the new form is:
![new form]()
Step 3: Coding
Now click the submit button and write the code.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace First_Csharp_app
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
try
{
if (!(usertxt.Text == string.Empty))
{
if (!(passtxt.Text == string.Empty))
{
String str = "server=MUNESH-PC;database=windowapp;UID=sa;password=123";
String query = "select * from data where username = '" + usertxt.Text + "'and password = '" + this.passtxt.Text + "'";
SqlConnection con = new SqlConnection(str);
SqlCommand cmd = new SqlCommand(query, con);
SqlDataReader dbr;
con.Open();
dbr = cmd.ExecuteReader();
int count = 0;
while (dbr.Read())
{
count = count + 1;
}
if (count == 1)
{
this.hide();
Form2 f2 = new form2(); //this is the change, code for redirect
f2.ShowDialog();
}
else if (count > 1)
{
MessageBox.Show("Duplicate username and password", "login page");
}
else
{
MessageBox.Show(" username and password incorrect", "login page");
}
}
else
{
MessageBox.Show(" password empty", "login page");
}
}
else
{
MessageBox.Show(" username empty", "login page");
}
// con.Close();
}
catch (Exception es)
{
MessageBox.Show(es.Message);
}
}
}
}
Step 4: Output
When you click on the submit button a new form will be opened named form2.
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