There is a common and simple requirement in windows applications to Open a new form(say Form2) when clicked a button in Form1 and also close Form1 at the same time.
Table of Contents
On Button Click Open Form 2 and Close Form 1
There are many ways you can close current form and open a new form in .NET.See below,
1) Close Form1 and Show Form2 – C#
private void btnLogin_Click(object sender, EventArgs e)
{
this.Close(); //Close Form1,the current open form.
Form2 frm2 = new Form2();
frm2.Show(); // Launch Form2,the new form.
}2) Use Application.Run for each form in Main() method
//Declare a boolean property.This property to be set as true on button click.
public bool IsLoggedIn { get; set; }
private void btnLogin_Click(object sender, EventArgs e)
{
this.Close(); //Close Form1
/* Set the property to true while closing Form1.This propert will be checked
before running Form2 in Main method.*/
IsLoggedIN = true;
}Then Update the Main() method as below.
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Form1 frm1 = new Form1();
Application.Run(frm1);
/*Here the property IsLoggedIn is used to ensure that Form2 won't be shown when user closes Form1 using X button or a Cancel button inside Form1.*/
if (frm1.IsLoggedIn)
{
Application.Run(new Form2());
}
}3) Hide Form1 and Show Form2 – C#
Here Form1 will remain open as long as the application is live.This option is the worst and hence not at all suggested.
private void btnLogin_Click(object sender, EventArgs e)
{
this.Hide(); //Hide Form1.
Form2 frm2 = new Form2();
frm2.Show(); // Launch Form2
}Summary
In this post we have seen samples to close Form1 and open Form2 in C# and same code logic can be used in VB.NET. Hope these code snippets has helped you to rectify the issues during close one form and open another form in C# or VB.NET. Leave your comments in the comment section below.
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How to close form1 and open form2 in VB.NET,
Application.run to close a form and open another form
Thank you !!! This helped me a lot !!!