图形重复值

Question

我正在尝试从数据库中填充条形图，并希望添加一个带状线作为目标。我正在尝试在hh：mm：ss中添加值作为标签，但是当我尝试执行此操作时，它会重复这些值，并且得到的条数是我应有的两倍。

这是用于添加标签的代码，似乎在复制条形图：

    foreach (DataRow row in dt.Rows)
    {
        int total = (int)row["Dialer_Time"];
        int index = chtDialerTime.Series["Default"].Points.AddXY(row["agent_name"], new object[] { total });
        chtDialerTime.Series["Default"].Points[index].Label = hhh_mm_ss(total);
    }

所有代码：

protected void BindChart()

{

    DataTable dt = new DataTable();

    string query = string.Format("SELECT[agent_name], [Dialer Time] AS Dialer_Time FROM[vwDialerTimeToday] WHERE([Dialer Time] > 0) ORDER BY[Dialer Time] ");
    dt = GetData(query);
    chtDialerTime.DataSource = dt;

    chtDialerTime.Series["Default"].XValueMember = "agent_name";
    chtDialerTime.Series["Default"].YValueMembers = "Dialer_Time";
    chtDialerTime.ChartAreas[0].AxisY.Maximum = 18000;
    chtDialerTime.ChartAreas[0].AxisX.MajorGrid.Enabled = false;
    chtDialerTime.ChartAreas[0].AxisY.MajorGrid.Enabled = false;

    chtDialerTime.DataBind();

    foreach (DataRow row in dt.Rows)
    {
        int total = (int)row["Dialer_Time"];
        int index = chtDialerTime.Series["Default"].Points.AddXY(row["agent_name"], new object[] { total });

        chtDialerTime.Series["Default"].Points[index].Label = hhh_mm_ss(total);
    }


    StripLine stripLine1 = new StripLine();
    stripLine1.StripWidth = 0;
    stripLine1.BorderColor = System.Drawing.Color.Green;
    stripLine1.BorderWidth = 5;
    stripLine1.BorderDashStyle = ChartDashStyle.DashDot;
    stripLine1.IntervalOffset = 12600;
    stripLine1.BackColor = System.Drawing.Color.Green;
    chtDialerTime.ChartAreas[0].AxisY.StripLines.Add(stripLine1);


    chtDialerTime.ChartAreas[0].AxisY.LabelStyle.Font = new System.Drawing.Font("Trebuchet MS", 0.1F);
    chtDialerTime.Series[0].Font = new Font("Arial", 18, FontStyle.Bold);

}

string hhh_mm_ss(int seconds)
{
    int sec = seconds % 60;
    int min = ((seconds - sec) / 60) % 60;
    int hhh = (seconds - sec - 60 * min) / 3600;
    return hhh > 0 ? string.Format("{2}:{1:00}:{0:00}", sec, min, hhh)
                   : min + ":" + sec.ToString("00");
}