Question

I have this button with the code:

   private void button22_Click_1(object sender, EventArgs e)
    {
        Separare sp = new Separare(dataGridView1,label_pin.Tag.ToString(),label_pin.Text);
        sp.FormClosed += new FormClosedEventHandler(ClosedForm);
        sp.Show();

    }

The FormClosedEventHandler looks like this:

   DataTable bon_temp = bon_tempTableAdapter.GetDataByTable(label_pin.Tag.ToString());

        foreach (DataRow row in bon_temp.Rows)
        {
            AddRow(row.ItemArray[3].ToString(), Convert.ToInt32(row.ItemArray[4]), Convert.ToDecimal(row.ItemArray[5]));
            Console.WriteLine(row.ItemArray[3].ToString(), Convert.ToInt32(row.ItemArray[4]), Convert.ToDecimal(row.ItemArray[5]));
        }

        bon_tempTableAdapter.DeleteQuery(label_pin.Tag.ToString());

where the AddRow method adds rows to DataGridView. My problem is that when i close the sp form the rows are not added to the DataGridView.

Answer 1

FormClosed occurs whenever the user closes the form, after the form has been closed and specifies the close reason.

The reason for your code not working might be that some controls on the form are already destroyed…

I suggest you use FormClosing event which occurs whenever the user closes the form, before the form has been closed and specifies the close reason.

Example code (it is very similar to what you did above):

this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.MyMainForm_FormClosing);

...

private void MyMainForm_FormClosing(object sender, FormClosingEventArgs e)
{
  //your code goes here
  //optionally, you can get or set e.Cancel which gets or sets a value indicating that the event should be cancelled; in this case the form won't close if you cancel it here
  //or, you can check e.CloseReason which gets a value that indicates why the form is being closed (this is an enum Systems.Windows.Forms.CloseReason)
}