Question

I want that when I insert or update records in another form (Form2), the DataGridView on Form1 should automatically refresh (call btnRefresh) after each operation or preferably wait until all change operations have finished, and update the DataGridView form Form2‘s closing event with all changes.

I believe in VB.NET this is achieved with Form1.DataGridView.Refresh, but I am not sure in C#. I was told that I pass the reference of the DataGridView on Form1 to Form2 using properties but since I’m new to C#, I didn’t know how to. How can I resolve this issue?

My refresh button code:

private void btnRefresh_Click(object sender, EventArgs e)
{
    GVThesis.DataSource = thesisRepository.GetThesis();
    GVThesis.Refresh();
}

Answer 1

Firs, wrap your refresh code into a method of its own, and call that from your click event handler method, like so:

    private void btnRefresh_Click(object sender, EventArgs e) 
    { 
        this.RefreshData();
    }

    public void RefreshData()
    {
        GVThesis.DataSource = thesisRepository.GetThesis(); 
        GVThesis.Refresh(); 
    }

Then, asuming you are instantiating and launching the new form (Form2) from your Form1, simply go into the code of Form2 and create yourself a new constructor overload which will accept a reference to Form1, and store it in a private variable, like so:

public partial class Form2 : Form
{
    private Form1 frm1;

    public Form2()
    {
        InitializeComponent();
    }

    public Form2(Form1 otherForm)
    {
        InitializeComponent();
        this.frm1 = otherForm;
    }
}

Then you can call the “refresh” from anywhere you like in Form2 like so:

this.frm1.RefreshData();

EDIT:

I created a small sample, I cannot upload it here…but here is a screenshot of both the program itself in VS, as well as a screenshot of the result of running it and performing the function…hopefully that will help.

The program (zoom your view if it appears too small)

The Result: