how to get gridview selected row value to text box which is in another windows form

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C#

I have two forms form1 and form2.

Form1 contains text boxes, radiobuttons,listboxes and edit toolstripbutton and form2 contains DataGridView.

My question is I want to display selected row data of DatagridView in respective text boxes as I clicked edit toolstrip button.

it is getting error as (object reference not set to an instance of an object)

this is form1 code

---------------------
public static string Gender, Division, Genre, Event, Scoreeve, Relay,Note,Selectmode;
public static int Rounds, Scoreteam, timeprecison, Advancement;

public frmAddEditEvents()
       {
           if (Selectmode == "update")
               fillRecord();
           if (Selectmode == "insert")
           InitializeComponent();
       }

public void  fillRecord()
       {
           try
           {


               rdbMale.Text = Gender;
               cmbDivison.Text = Division;
               rdbRun.Text   = Genre;
               cmbEvent.Text = Event;
               chkScore.Text = Scoreeve;
               chkRelay.Text = Relay;
               nudRounds.Value = Rounds;
               nudScores.Value = Scoreteam;
               nudTimeprecision.Value = timeprecison;
               txtEventnote.Text = Note;
               numericUpDown1.Value = Advancement;
               btnSave.Text = "update";


           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message.ToString());

           }

       }

this is my code form2
--------------------------

private void tsbtnEdit_Click(object sender, EventArgs e)
       {



           if (grdEvents.SelectedRows.Count > 0)
           {


             frmAddEditEvents.Selectmode = "update";
             frmAddEditEvents.Gender = Convert.ToString(grdEvents.SelectedRows[0].Cells[1].Value);
             frmAddEditEvents.Division = Convert.ToString(grdEvents.SelectedRows[0].Cells[2].Value);
             frmAddEditEvents.Genre = Convert.ToString(grdEvents.SelectedRows[0].Cells[3].Value);
             frmAddEditEvents.Event = Convert.ToString(grdEvents.SelectedRows[0].Cells[4].Value);
             frmAddEditEvents.Scoreeve = Convert.ToString(grdEvents.SelectedRows[0].Cells[5].Value);
             frmAddEditEvents.Relay = Convert.ToString(grdEvents.SelectedRows[0].Cells[6].Value);
             frmAddEditEvents.Rounds = Convert.ToInt16(grdEvents.SelectedRows[0].Cells[7].Value);
             frmAddEditEvents.Scoreteam = Convert.ToInt16(grdEvents.SelectedRows[0].Cells[8].Value);
             frmAddEditEvents.timeprecison = Convert.ToInt16(grdEvents.SelectedRows[0].Cells[9].Value);
             frmAddEditEvents.Note = Convert.ToString(grdEvents.SelectedRows[0].Cells[10].Value);
             frmAddEditEvents.Advancement = Convert.ToInt16(grdEvents.SelectedRows[0].Cells[11].Value);

             frmAddEditEvents AEE = new frmAddEditEvents();
               AEE.ShowDialog();

           }
           else
           {
               MessageBox.Show("Please select any record to update");
           }