display data on the text box of another form from datagridview in c#

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C#

I first start by thanking dave for his help but now again I want to retrieve all the data from datagridview after selecting one cell in the datagridview and pass that value in the method that calling another form below are the code for the first form:

private void dataGridView1_CellClick(object sender, System.Windows.Forms.DataGridViewCellEventArgs e)
       {
           int i =int.Parse(dataGridView1.CurrentRow.Cells[0].Value.ToString());
           if (e.ColumnIndex == (dataGridView1.Columns.Count - 9))
           {
               {
                  // int i = int.Parse(dataGridView1.CurrentRow.Cells[0].Value.ToString());
                   updateFaults obj = new updateFaults(i);
                   obj.Show();
               }
           }

the following is the code for the second form:

private void updateFaults_Load(object sender, EventArgs e)
       {  
           cmbclient.Text = fault_id.ToString();
           textBox1.Text = fault_id.ToString();
           cmbsys.Text = fault_id.ToString();
           cmbsite.Text = fault_id.ToString();
           cmbcategory.Text = fault_id.ToString();
           textBox4.Text = fault_id.ToString();
           textBox5.Text = fault_id.ToString();
           textBox6.Text = fault_id.ToString();
       }

can someone help me please :(