Estou tentando configurar meu programa para que o usuário possa exibir um gráfico de colunas empilhadas que exibe o número de categorias de rejeição que aparecem em cada departamento (por exemplo, 5 aparecem no departamento 1, 3 no departamento 2, etc.). Eu dei uma olhada on-line e resolvi fazer isso sozinho, mas não consigo fazê-lo funcionar. Se alguém pudesse ajudar, seria fantástico.

O que o gráfico atualmente faz quando o usuário pressiona um botão para alternar para um gráfico de colunas empilhadas:

Código:

private void btnStacked_Click(object sender, EventArgs e)
    {
        charRejections.Series["RFR"].Enabled = false;

        charRejections.Series["Department 1"].Points.Clear();
        charRejections.Series["Department 1"].Enabled = true;

        charRejections.Series["Department 2"].Points.Clear();
        charRejections.Series["Department 2"].Enabled = true;

        charRejections.Series["Department 3"].Points.Clear();
        charRejections.Series["Department 3"].Enabled = true;
        {
            string connectiontring = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\\Database1.mdb";
            DataConnection = new OleDbConnection(connectiontring);

            try
            {

                DataConnection.Open();
                OleDbCommand command = new OleDbCommand();
                command.Connection = DataConnection;
                string query1 = "SELECT COUNT(reject_category) as reject, reject_category FROM tblReject_test GROUP BY reject_category";
                command.CommandText = query1;


                OleDbDataReader reader = command.ExecuteReader();
                while (reader.Read())
                {
                    charRejections.Series["Department 1"].Points.AddXY(reader["reject_category"].ToString(), reader["reject"].ToString());
                    charRejections.Series["Department 2"].Points.AddXY(reader["reject_category"].ToString(), reader["reject"].ToString());
                    charRejections.Series["Department 3"].Points.AddXY(reader["reject_category"].ToString(), reader["reject"].ToString());
                }

                DataConnection.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error " + ex);
            }
        }

        this.charRejections.Series["Department 1"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.StackedColumn;
        this.charRejections.Series["Department 2"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.StackedColumn;
        this.charRejections.Series["Department 3"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.StackedColumn;
    }