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Switching between forms (closing one form, then opening another)


Switching between forms (closing one form, then opening another)

By : Sugar Dominguez
Date : November 22 2020, 10:33 AM
around this issue You could add two panels to a single form, each of which contains the controls you would otherwise have added to one of the two forms. Then switch between the panels by changing their visibility or Z-order. This is slightly tricky in the Windows Forms Designer because you'll have to design the two panels, then position them in the same spot on the containing form.
As @ryanyuyu points out, you can set the Dock property to DockStyle.Fill and switch which panel is on top using Control.BringToFront or Control.SendToBack(). This is also a decent way to interact with the two panels in the designer, as you can switch which is on top from a context menu option.
code :


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Forms closing without pop ups(blocking popup and forcefully closing other forms) on main form exit

Forms closing without pop ups(blocking popup and forcefully closing other forms) on main form exit


By : abam1160
Date : March 29 2020, 07:55 AM
may help you . You'll need to pay attention to the e.CloseReason property value that's passed to you in the FormClosing event. Only prompt the user if e.CloseReason == CloseReason.UserClosing. This also ensures that you don't display the dialog when the user shuts down Windows. For example:
code :
    private void Form2_FormClosing(object sender, FormClosingEventArgs e) {
        if (e.CloseReason == CloseReason.UserClosing && !saved) {
            switch (MessageBox.Show(this, "Save changes?", "Closing",
                    MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question)) {
                case DialogResult.Yes: Save(); break;
                case DialogResult.No: break;
                case DialogResult.Cancel: e.Cancel = true;
            }
        }
    }
2 Forms Closing and opening

2 Forms Closing and opening


By : Yuwei Hou
Date : March 29 2020, 07:55 AM
it helps some times How about this? This closes the current form if the dialog is cancelled.
code :
public App_Index()
{
    InitializeComponent();

    this.Hide();

    Authorization loginForm = new Authorization();
    if (loginForm.ShowDialog() == DialogResult.Cancel)
        Close();
}
VB.net opening and closing forms

VB.net opening and closing forms


By : Francisco Porcel Rod
Date : March 29 2020, 07:55 AM
I wish this help you
But everytime i switch forms the form load event will only trigger once. Is there something wrong with my code? I am guesing the Me.Hide() will only hide the previous form and not totally close it.
code :
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Form1.Show()
    Me.Close()    
End Sub

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Form2.Show()
    Me.Close()
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim frm As New Form1  ' create a new Form1 object
    frm.Show()            ' ... and display it

    Me.Close()
End Sub

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim frm As New Form1  ' create a new Form2 object
    frm.Show()            ' ... and display it

    Me.Close()
End Sub
Closing of all Previous Forms and Opening of New Form in C#

Closing of all Previous Forms and Opening of New Form in C#


By : Zeinab Mohamed
Date : March 29 2020, 07:55 AM
will be helpful for those in need How to Close background Forms whenever a new form is opened in Windows Forms C#? , Two approaches.
First is using Application.OpenForms like this:
code :
foreach (Form form in Application.OpenForms)
{
    if(Form is YourMainFormClassName) //Check if current form is your main form and do not close it since your app would close. You can use .Hide() if you want
        return;

    form.Close();
}
public static class Settings //Class is also static
{
    public static List<Form> OpenedForms = new List<Form>();

    public static int MaxIdOfOpenedForm() //With this method we check max ID of opened form. We will use it later
    {
        int max = -1;
        foreach(Form f in OpenedForms)
        {
            if(Convert.ToInt32(f.Tag) > max)
                max = Convert.ToInt32(f.Tag);
        }
        return max;
    }

    public static void RemoveSpecificForm(Form form) //Remove specific form from list
    {
        for(int i = 0; i < OpenedForms.Count; i++)
        {
            if((OpenedForms[i] as Form).Tag == form.Tag)
            {
                OpenedForms.Remove(form);
                return;
            }
        }
    }

    public static void CloseAllOpenedForms()
    {
        for(int i = 0; i < OpenedForms.Count; i++)
        {
            OpenedForms.Remove(OpenedForms[i]);
        }
    }
}
public partial class YourForm
{
    public YourForm()
    {
        InitializeComponents();

        this.Tag = Settings.MaxIdOfOpenedForm() + 1; //We are setting Tag of newly opened form
        Settings.OpenedForms.Add(this); //Adding new form to opened forms.
    }
}
private void YourFormClosed(object sender, EventArgs e)
{
    RemoveSpecificForm(this);
}
Winform Forms Closing and opening a new form

Winform Forms Closing and opening a new form


By : user3815222
Date : March 29 2020, 07:55 AM
this will help you can use a boolean (global variable) as exit flag in LoginForm
initialize it to :
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