Closing a form and then call another one in c# windows

NAGARAJU TAMADA

Hi to all,

I have a main form,in this i placed menustrip with some menuitems. When i clicked a menu item form will displayed.When I clicked another one the previous one should be closed.

I used this below code

this.Close();

AdminMainForm adminMainForm = new AdminMainForm();

adminMainForm.Show();

But this code not working for my query.

when I use this.Hide() the Application is still running

Finally my query is when i enter and close the login form automativally it will displayed main form. please reply to me

Regards

Nagaraju T

9 Replies

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Iftikar Hussain13y ago
Accepted answer
the below code you need to put in admin form like below

public AdminForm()
{
InitializeComponent();
List
openForms = new List();

foreach (Form f in Application.OpenForms)
openForms.Add(f);

foreach (Form f in openForms)
{
if (f.Name != "AdminForm")
{
f.Close();
}

}
}

and in Program.cs

[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
LoginForm login = new LoginForm();
login.Show();
Application.Run();
}

Regards,
Iftikar
NAGARAJU TAMADA13y ago
Thanks for the Answer
Its working fine now

Regards
NagaRaju T
NAGARAJU TAMADA13y ago
After Clicking The Submit button of login form
Loginform close and Adminform will open my code is here

///
/// Adding the New user into the database
///
///
///
private void btnSubmit_Click(object sender, EventArgs e)
{

try
{
SqlConnection sqlConnection = vendor.DataSourceClass.getSqlConnection();
sqlConnection.Open();
DataTable dt = new DataTable();
SqlDataAdapter da = new SqlDataAdapter("Select * from SignUp where UserName='" + txtUserName.Text + "'", sqlConnection);
da.Fill(dt);
string Username = dt.Rows[0][1].ToString();
string Password = dt.Rows[0][2].ToString();
string Role = dt.Rows[0][5].ToString();

if (txtUserName.Text==Username && txtPwd.Text == Password && comboRole.Text== Role)
{
GlobalVariableDetails.UserName = txtUserName.Text;
GlobalVariableDetails.Date = DateTime.Now;

if (comboRole.Text == "Admin")
{
AdminMainForm adminMainForm = new AdminMainForm();

List openForms = new List();

foreach (Form f in Application.OpenForms)
openForms.Add(f);

foreach (Form f in openForms)
{
if (f.Name != "adminMainForm")
{
f.Close();
}

}
adminMainForm.Show();

}
else
{
UserMasterForm userMasterForm = new UserMasterForm();
userMasterForm.Show();
}
}
else
{
MessageBox.Show("Invalid UserName and Password");
}
}
catch (Exception exception)
{
MessageBox.Show("Invalid UserName And Password, Please Contact Administrator");
string errorMessage = ErrorHandling.ExceptionClass.CreateErrorMessage(exception);
ErrorHandling.ExceptionClass.LogFileWrite(errorMessage);
}
}
Iftikar Hussain13y ago
can you share your code?

Regards,
Iftikar
Iftikar Hussain13y ago
what is happening now?

Regards,
Iftikar
NAGARAJU TAMADA13y ago
Please send another one.my query is still not working
Iftikar Hussain13y ago
try like this in Initialize form

List openForms = new List();

foreach (Form f in Application.OpenForms)
openForms.Add(f);

foreach (Form f in openForms)
{
if (f.Name != "Menu")
f.Close();
}

Regards,
Iftikar
NAGARAJU TAMADA13y ago
Thanks for the Answer.

But Iam not using the MDI container.Iam using normal form and placed menustrip and add forms to this menu strip items.

Reply to me
Iftikar Hussain13y ago
Hi,
Please refer the below link

http://www.cs.trinity.edu/~thicks/Tutorials/Visual-Studio-Windows-App-Form-MenuStrip-Apps/Visual-Studio-Windows-App-Form-MenuStrip-Apps.html

Regards,
Iftikar