CODEWITHSUNDEEP
c#winforms
Mallory Rich
Mallory Rich

Reputation: 25

Controlling a button from another form c#

I have this project where you can login as a user and as an employee and if you log in as an employee certain buttons such as reports will show up on the homepage.

I have two forms named HomePage and frmSignIn. If the user signs in from frmSignIn I want certain button on HomePage to be visible. I have tried several ways but cannot get it to work.

I did make the button public to see if it works, although I know this is bad practice.

if (ValidCredentials(txtUsername.Text, txtPassword.Text) == true && checkBoxEmployee.Checked == true && txtBoxEmpPin.Text.Equals(employeePin))
{
    this.DialogResult = DialogResult.OK;
    this.Tag = _usersId;
    this.Close();
    MessageBox.Show("You have successfully logged in as an employee.");

    HomePage hp = new HomePage();

    hp.Button.Visible = true;   // !!!! Does not work !!!!
}

Upvotes: 0

Views: 1062

Answers (3)

M. Wiśnicki
M. Wiśnicki

Reputation: 6203

You can use public property where You keep reference to your button, try this example.

Form1 

public partial class Form1 : Form
{



    public Form1()
    {
        InitializeComponent();

    }

    private void button1_Click(object sender, EventArgs e)
    {
        Form2 x = new Form2();
        x.Button1 = this.button1;
        x.Show();
    }
}

Form2

public partial class Form2 : Form
    {
        private Button _button1;

        public Button Button1
        {
            get { return _button1; }
            set { _button1 = value; }
        }

        public Form2()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            _button1.Visible = false;
        }
    }

Upvotes: 1

Frank
Frank

Reputation: 451

One way to do this, is making your original homepage known to the frmSignIn.

To do this, you could create a property in your frmSignIn like

public MyHomePage Form { get; set; }

Then, when creating the SignIn form, also add the reference of the homepage to the new instance of frmSignIn. Something like:

var mySignInForm = new frmSignIn();
mySignInForm.MyHomePage = this;

Now, you have a decent reference in your frmSignIn to do whatever you want. You still would have to make the button public though.

Alternatively you could, instead of the complete form, just add a reference to the button you need in the same way.

This may not be the prettiest and most elegant solution, but it will work.

Upvotes: 1

Prajwal
Prajwal

Reputation: 4000

Create a method for homepage which enables Button

public void EnableButton(){
   this.Button.Visible = true;
}

And Do this,

this.DialogResult = DialogResult.OK;
this.Tag = _usersId;
HomePage hp = new HomePage();  //here, creating instance of homepage
hp.EnableButton(); //This enables the required button
MessageBox.Show("You have successfully logged in as an employee.");
hp.showDialog(); //Shows HomePage
this.Hide(); //Hides login page.

Upvotes: 0

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