Impossible de manipuler mon datagridview

Bonjour,

J'essaie de manipuler les fonctions ci-dessous sur mon datagridview mais rien ne se passe.

Code:

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//Adding a New Record here
        private void dataGridView1_RowLeave(object sender, DataGridViewCellEventArgs e)
        {
            string studentId = dataGridView1.CurrentRow.Cells["StudentId"].Value.ToString();
 
            if (studentId.Equals(string.Empty))
            {
                StudentBO objStudentBO = new StudentBO();
 
                try
                {
                    objStudentBO.RollNumber = dataGridView1.CurrentRow.Cells["RollNumber"].Value.ToString();
                    objStudentBO.FirstName = dataGridView1.CurrentRow.Cells["FirstName"].Value.ToString();
                    objStudentBO.LastName = dataGridView1.CurrentRow.Cells["LastName"].Value.ToString();
                    objStudentBO.Gender = dataGridView1.CurrentRow.Cells["Gender"].Value.ToString();
                    objStudentBO.Stream = dataGridView1.CurrentRow.Cells["Stream"].Value.ToString();
 
                    StudentBL.AddNewStudentDetails(objStudentBO);
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
 
        }

Code:

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//Deleting a Record
        private void dataGridView1_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            try
            {
                Int32 iStudentId = Convert.ToInt32(dataGridView1.CurrentRow.Cells["StudentId"].Value);
 
                DialogResult result1 = MessageBox.Show("Are you sure you want to delete this Student Record?",
                                      "Delete the Record",
                                       MessageBoxButtons.YesNo);
 
                if (result1 == DialogResult.Yes)
                {
                    int result = StudentBL.RemoveStudent(iStudentId);
 
                    if (result > 0)
                    {
                        //Record deleted successfully
                        //showing the new refreshed data
                        showData();
                    }
                }
            }//try
            catch (Exception ex)
            {
                //MessageBox.Show(ex.Message);
                MessageBox.Show("Cannot Delete Record");
            }
        }

Code:

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       //Updating a Record here
        private void dataGridView1_CellLeave(object sender, DataGridViewCellEventArgs e)
        {
            string studentId = dataGridView1.CurrentRow.Cells["StudentId"].Value.ToString();
 
            if (!studentId.Equals(string.Empty))
            {
                StudentBO objStudentBO = new StudentBO();
 
                objStudentBO.StudentId = Convert.ToInt32(dataGridView1.CurrentRow.Cells["StudentId"].Value);
                objStudentBO.RollNumber = dataGridView1.CurrentRow.Cells["RollNumber"].Value.ToString();
                objStudentBO.FirstName = dataGridView1.CurrentRow.Cells["FirstName"].Value.ToString();
                objStudentBO.LastName = dataGridView1.CurrentRow.Cells["LastName"].Value.ToString();
                objStudentBO.Gender = dataGridView1.CurrentRow.Cells["Gender"].Value.ToString();
                objStudentBO.Stream = dataGridView1.CurrentRow.Cells["Stream"].Value.ToString();
 
                StudentBL.UpdateStudentDetails(objStudentBO);
            }
        }

?

Merci,