Finding parent form and tablelayoutPanel

Question

Finding parent form and tablelayoutPanel

Shaifali jain 420

hello ,

 private void TDlloading_error_Load(object sender, EventArgs e)
        {
            HideButtonsInParentFormTableLayoutPanel();
        }
        private void HideButtonsInParentFormTableLayoutPanel()
        {
            // Access the parent form
            Form parentForm = this.ParentForm;

            // Check if the parent form exists and contains a TableLayoutPanel
            if (parentForm != null && parentForm.Controls.ContainsKey("tableLayoutPanel1"))
            {
                TableLayoutPanel tableLayoutPanel = parentForm.Controls["tableLayoutPanel1"] as TableLayoutPanel;

                // Hide the buttons in the TableLayoutPanel
                if (tableLayoutPanel != null)
                {
                    foreach (Control control in tableLayoutPanel.Controls)
                    {
                        if (control is Button button)
                        {
                            button.Visible = false;
                        }
                    }
                }
            }
        }

i am trying to hide all the buttons in the tablelayout panel of parent form but i am getting this.parentform as null as my current form is hosted itself inside a panel . so how do i access the parentform in which the panel is hosted .

Viorel 125.7K Reputation points

2023-09-26T18:04:00.1733333+00:00

ParentForm seems to work. Probably your details are different.

You can also try this: Form parentForm = this.Parent.FindForm( ).
Anonymous

2023-09-27T06:17:48.9733333+00:00

Hi @Shaifali jain , Welcome to Microsoft Q&A,

Can you tell me specifically what the problem is? I don't seem to have detected the problem.
Shaifali jain 420 Reputation points

2023-09-27T08:13:49.19+00:00

@Viorel ,
Shaifali jain 420 Reputation points

2023-09-27T08:20:25.1066667+00:00

@Anonymous , consider a scenario where a form named mainmaster loads . it has a panel named as mainpanel (which is used to load every single inside it) and a tablelayout panel on its right side . the tableloayout panel contains several buttons on its rows which must be available to logged-in users only like create voucher , delete voucher . so its obvious that they should not be visible to those users who are not logged-in .

working
Now when the mainmaster loads , the panel also loads the login page asking for username and password but i am looking for a way by which these buttons on the tablelayout can be made hidden .
Anonymous

2023-09-27T08:31:50.3966667+00:00

Hi @Shaifali jain , Sorry. Can you show me your designer interface? And from your description, it seems that these buttons should be hidden initially and become visible when the user logs in.
KOZ6.0 6,735 Reputation points

2023-09-27T09:21:34.91+00:00
Did you set Visible = true or Show() before adding TDlloading_error to FatherPanel? There should be no problem if you do it after adding it.

TDlloading_error newChildForm = new TDlloading_error(); newChildForm.TopLevel = false; //newChildForm.Show(); // error! FatherPanel.Controls.Add(newChildForm); newChildForm.Show(); // OK!

KOZ6.0 6,735

or use Shown event.

private void TDlloading_error_Shown(object sender, EventArgs e) {
    HideButtonsInParentFormTableLayoutPanel();
}

Shaifali jain 420

@Anonymous ,
this is the first form named as mainmaster , it has a panel named as mainpanel which will hold all the future forms inside it whether login or create voucher ,or delete voucher . it has a tablelayout on the right side .
User's image

its code behind file

  public mainmaster()
        {
            InitializeComponent();
        }
          
        private void mainmaster_Load(object sender, EventArgs e)
        {        
            RecreateCenterForm<TDlloading_error>();        
        }

        private void RecreateCenterForm<T>() where T : Form, new()
        {
          // suggested by koz6.0
            foreach (Form oldForm in Mainmasterpanel.Controls.OfType<Form>().ToArray())
            {
                using (oldForm)
                {
                    oldForm.Close();
                    Mainmasterpanel.Controls.Remove(oldForm);
                }
            }
           
            var newForm = new T
            {
                TopLevel = false,
              //  Visible = true
            };
            // Calculate the X and Y coordinates for centering the form
            int x = (Mainmasterpanel.Width - newForm.Width) / 2;
            int y = (Mainmasterpanel.Height - newForm.Height) / 2;
            //// Set the location of the form
            newForm.Location = new Point(x, y);
            newForm.FormBorderStyle = FormBorderStyle.None;
            newForm.StartPosition = FormStartPosition.CenterParent;
            newForm.Anchor = AnchorStyles.None;
            newForm.ControlBox = false;
            newForm.ShowInTaskbar = false;
            //   newForm.BringToFront();
            newForm.Show();
            Mainmasterpanel.Controls.Add(newForm);
            newForm.Focus(); // sets the focus to newly form 
           
        }

now when it loads , it opens a new form named as TDlloading_error .this form ie. TDlloading_error doesn't do anything as of now . Also note that its design has three panels but they don't do anything now but when the user presses enter , the user goes to login page .

User's image

code behing file

  public TDlloading_error()
        {
            InitializeComponent();
        }
        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {         
            
            if (keyData == (Keys.Escape))
            {
                
                return true;
            }
            else if(keyData == (Keys.Enter))
            {
                RecreateCenterForm<login>();
                return true;
            }

            return base.ProcessCmdKey(ref msg, keyData);

        }
        private void RecreateCenterForm<T>() where T : Form, new()
        {
            Panel P = this.Parent as Panel;
           
            if (P != null)
            {
                foreach (Form oldForm in P.Controls.OfType<Form>().ToArray())
                {
                    using (oldForm)
                    {
                        oldForm.Close();
                        P.Controls.Remove(oldForm);
                    }
                }
     
                var newForm = new T
                {
                    TopLevel = false,
                   // Visible = true 
                };
                // Calculate the X and Y coordinates for centering the form
                int x = (P.Width - newForm.Width) / 2;
                int y = (P.Height - newForm.Height) / 2;
                // Set the location of the form
                newForm.Location = new Point(x, y);
                newForm.FormBorderStyle = FormBorderStyle.None;
                newForm.StartPosition = FormStartPosition.CenterParent;
                newForm.Anchor = AnchorStyles.None;
                newForm.ControlBox = false;
                newForm.ShowInTaskbar = false;
                //  newForm.BringToFront(); // no need as there is no previous form left to overlap the current form 
                 P.Controls.Add(newForm);
                newForm.Show();
                newForm.Focus();
                
            }
            
        }

now here is the problem , till the user is not logged in , the user must not see the buttons in the tablelayout panel
User's image

yes you are correct these buttons should be hidden initially

Answer accepted by question author

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Your answer

Viorel 125.7K Reputation points

2023-09-26T18:04:00.1733333+00:00

ParentForm seems to work. Probably your details are different.

You can also try this: Form parentForm = this.Parent.FindForm( ).
Anonymous

2023-09-27T06:17:48.9733333+00:00

Hi @Shaifali jain , Welcome to Microsoft Q&A,

Can you tell me specifically what the problem is? I don't seem to have detected the problem.
Shaifali jain 420 Reputation points

2023-09-27T08:13:49.19+00:00

@Viorel ,
Shaifali jain 420 Reputation points

2023-09-27T08:20:25.1066667+00:00

@Anonymous , consider a scenario where a form named mainmaster loads . it has a panel named as mainpanel (which is used to load every single inside it) and a tablelayout panel on its right side . the tableloayout panel contains several buttons on its rows which must be available to logged-in users only like create voucher , delete voucher . so its obvious that they should not be visible to those users who are not logged-in .

working
Now when the mainmaster loads , the panel also loads the login page asking for username and password but i am looking for a way by which these buttons on the tablelayout can be made hidden .
Anonymous

2023-09-27T08:31:50.3966667+00:00

Hi @Shaifali jain , Sorry. Can you show me your designer interface? And from your description, it seems that these buttons should be hidden initially and become visible when the user logs in.
KOZ6.0 6,735 Reputation points

2023-09-27T09:21:34.91+00:00

Did you set Visible = true or Show() before adding TDlloading_error to FatherPanel? There should be no problem if you do it after adding it.

TDlloading_error newChildForm = new TDlloading_error(); newChildForm.TopLevel = false; //newChildForm.Show(); // error! FatherPanel.Controls.Add(newChildForm); newChildForm.Show(); // OK!
KOZ6.0 6,735 Reputation points

2023-09-27T09:27:58.0566667+00:00

or use Shown event.

private void TDlloading_error_Shown(object sender, EventArgs e) { HideButtonsInParentFormTableLayoutPanel(); }

Answer 1

KOZ6.0 6,735

mainmaster.RecreateCenterForm<T>

     newForm.Show();
     Mainmasterpanel.Controls.Add(newForm);

Please correct this part. (Controls.Add → Show)

Make this method public or internal and call it from TDlloading_error.
These are the same, right?

private void RecreateCenterForm<T>() where T : Form, new()
{
     mainmaster master = (mainmaster)this.Parent.FindForm();
     master.RecreateCenterForm<T>
}

Shaifali jain 420 Reputation points

2023-09-28T07:36:51.8833333+00:00

@koz6.0 , please elaborate again in which file , what changes i have to make .
Shaifali jain 420 Reputation points

2023-09-28T12:01:46.33+00:00

@KOZ6.0 , @Anonymous , pls see my project on https://github.com/Shaifalijain31/copyprojectshaifalijain and suggest where i am going wrong .
KOZ6.0 6,735 Reputation points

2023-09-28T21:32:45.45+00:00

It has been corrected.

OK:)
Anonymous

2023-09-29T02:13:54.23+00:00

Hi @Shaifali jain ，According to the test documents, it seems that the goal has been achieved. What's the latest problem?
Shaifali jain 420 Reputation points

2023-09-29T07:24:27.6866667+00:00

@Anonymous , @KOZ6.0 , yes the problem has been solved . Thanks again sir .

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Finding parent form and tablelayoutPanel

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