call variable from another form c#

Question

I have a DataGridView in Form1 and I\'m using this code to display another form called Generator:

private void button1         


        

Answer 1

Form 1:

private void button1_Click(object sender, EventArgs e)
{
    Form gen = new Generator(this.mydatagridview);
    gen.Show();
}

Generator Form:

DataGridView _dataGridView;
public Generator(DataGridView dataGridView)
{
    InitializeComponent();
    this._dataGridView = dataGridView;
}

private void button1_Click(object sender, EventArgs e)
{
    this._dataGridView...! // this will work
}

Things that you must do, and know (just tips, you are not forced to do these but I believe you will be a better programmer if you do! ;)

Always call InitializeComponent() in all form constructors. In your sample you didn't call it in one of the constructors.

C# knows only information of the type you have passed. If you pass a Form, then you only get Form properties (i.e. the properties of type Form), not the properties of your own form.

Try to encapsulate things. Do not pass a whole form to another form. Instead, pass things that you would like to use on the other form.