لماذا لا يمكن التحقق من الصف الأول في datagridview C# نتائج الكود الخاص بي جميع البيانات باستثناء الصف الأول؟

دعونا تخمين datagridview تحميل 10 بيانات. عندما قمت بالنقر فوق SelectALL 9، تم تحديد الصف بشكل صحيح ولكن لم يتم تحديد الصف الأول على أنه خطأ.

حتى لو

datagridview loaded only one data then i clicked SelectALL but row not selected

What I have tried:

private void ReportViewer_Load(object sender, EventArgs e)
        {
    grdEmailData.ColumnHeaderMouseClick += grdEmailData_ColumnHeaderMouseClick;
       
 }

private void btnSearch_Click(object sender, EventArgs e)
        {
            try
            {
                using (SqlConnection connection = new SqlConnection(ConnectionString))
                {
                    connection.Open();

                    string query = "SELECT * FROM email_notification WHERE bank_code = @BankCode AND stmdate = @StmDate " +
                                   "UNION " +
                                   "SELECT * FROM email_notification_arc WHERE bank_code = @BankCode AND stmdate = @StmDate";

                    using (SqlCommand command = new SqlCommand(query, connection))
                    {
                        command.Parameters.AddWithValue("@BankCode", _fiid); // Assuming _serverName is the bank code
                        command.Parameters.AddWithValue("@StmDate", dtpStmDate.Value.ToString("dd/MM/yyyy")); 

                        SqlDataAdapter adapter = new SqlDataAdapter(command);
                        DataTable dataTable = new DataTable();
                        adapter.Fill(dataTable);


                        DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();
                        checkBoxColumn.HeaderText = "SelectALL";
                        checkBoxColumn.Name = "All";
                        grdEmailData.Columns.Insert(0, checkBoxColumn);


                        // Bind the data to the DataGridView
                        grdEmailData.DataSource = dataTable;

                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"Error loading data: {ex.Message}", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

 private void grdEmailData_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            // Check if the clicked cell is in the "All" column header
            if (e.RowIndex == -1 && e.ColumnIndex == grdEmailData.Columns["All"].Index)
            {
                ToggleSelectAll();
            }
        }


        private void ToggleSelectAll()
        {
            // Toggle the select/unselect all logic in the "All" column
            bool selectAll = true;

            foreach (DataGridViewRow row in grdEmailData.Rows)
            {
                
                DataGridViewCheckBoxCell checkBoxCell = row.Cells["All"] as DataGridViewCheckBoxCell;

                if (checkBoxCell != null)
                {
                    checkBoxCell.Value = selectAll;
                }
            }
        }