TeeChart的用法

/// <summary>
    /// 獲得數據集
    /// </summary>
    /// <param name="sqlStr">傳遞查詢語句</param>
    /// <returns>返回數據集</returns>
    public static DataSet GetDataSet(string sqlStr)
    {
        string connstring = System.Configuration .ConfigurationSettings.AppSettings["conStr"];
        //string sqlStr = "select * from chart";
        SqlDataAdapter da = new SqlDataAdapter(sqlStr, connstring);
        DataSet ds = new DataSet();
        da.Fill(ds);
        return ds;
    }
/// <summary>
    /// 繪製統計圖
    /// </summary>
    /// <param name="SelectStr">Sql查詢語句</param>
    private void DrawBar(string SelectStr)
    {
        Chart chart = WebChart1.Chart;
        DataSet DS = new DataSet();
        //顯示圖片的格式，默認PNG
        WebChart1.PictureFormat = Steema.TeeChart.Export.PictureFormats.Bitmap;
        //設置保存數據形式，默認File，一般選session。Chart.Aspect(外觀屬性)
        WebChart1.TempChart = Steema.TeeChart.Web.TempChartStyle.Session;
        //獲取顯示圖片文件
        WebChart1.GetChartFile = "GetChart.aspx";
        //整個圖表的高度
        WebChart1.Height = 300;
        //整個圖表的寬度
        WebChart1.Width = 600;

        //顯示圖片的格式，默認PNG
        WebChart1.PictureFormat = Steema.TeeChart.Export.PictureFormats.Bitmap;      
        //設置保存數據形式，默認File，一般選session。Chart.Aspect(外觀屬性)
        WebChart1.TempChart = Steema.TeeChart.Web.TempChartStyle.Session;

        //圖表底色開始顏色
        //WebChart1.Chart.Panel.Gradient.StartColor = Color.Blue;//圖表底色開始顏色

        //設置圖形標題
        WebChart1.Chart.Header.Text = "個人每月開銷數目柱形圖";
        //設置X軸標題
        WebChart1.Chart.Axes.Bottom.Title.Text = "月份(月)";
        //設置Y1軸標題
        WebChart1.Chart.Axes.Left.Title.Text = "金額(元)";
        WebChart1.Chart.Axes.Left.Labels.ValueFormat = "#M/N";
        //參縱座標軸是否顯示
        WebChart1.Chart.Axes.Bottom.Grid.Visible = false ;
        //橫座標字體傾斜角度0~360
        WebChart1.Chart.Axes.Bottom.Labels.Angle= 30;
        //圖表左邊距
        WebChart1.Chart.Panel.MarginLeft = 15;
        //圖例間是否有間隔線
        WebChart1.Chart.Legend.DividingLines.Visible = true;
        //圖形顯示比例(好像無反應)
        //WebChart1.Chart .Aspect .Zoom  = 10;

        WebChart1.Dispose();

        //是否立體顯示
        WebChart1.Chart.Aspect.View3D = false;

        foreach (Steema.TeeChart.Styles.Series s in chart.Series)

        if (styles == 1)
        {
            //畫柱狀圖
            Steema.TeeChart.Styles.Bar sty1 = new Steema.TeeChart.Styles.Bar(WebChart1.Chart);
            Steema.TeeChart.Styles.Bar sty2 = new Steema.TeeChart.Styles.Bar(WebChart1.Chart);
            chart.Series.Add(sty1);
            chart.Series.Add(sty2);
        }
        if (styles == 2)
        {
            //畫折線圖
            Steema.TeeChart.Styles.Line sty1 = new Steema.TeeChart.Styles.Line(WebChart1.Chart);
            Steema.TeeChart.Styles.Line sty2 = new Steema.TeeChart.Styles.Line(WebChart1.Chart);
            chart.Series.Add(sty1);
            chart.Series.Add(sty2);
        }
        if (styles == 3)
        {
            Steema.TeeChart.Styles.Kagi sty1 = new Steema.TeeChart.Styles.Kagi(WebChart1.Chart);
            //Steema.TeeChart.Styles.Kagi sty2 = new Steema.TeeChart.Styles.Kagi(WebChart1.Chart);
            chart.Series.Add(sty1);
            //chart.Series.Add(sty2);
        }

        //添加第二個縱座標
        if (YaxixCount == 2)
        {
            Axis axisY2 = new Axis(false, false, WebChart1.Chart);
            chart.Series[1].CustomVertAxis = axisY2;
            //sty2.CustomVertAxis = axisY2;
            //bar2.CustomVertAxis = axisY2;
            WebChart1.Chart.Axes.Custom.Add(axisY2);
            axisY2.AxisPen.Color = Color.DarkGreen;//座標軸顏色
            axisY2.Title.Text = "數量";
            axisY2.Title.Font.Color = Color.Blue;  //座標軸標題顏色
            axisY2.Title.Font.Bold = false;
            axisY2.Title.Angle = 90;//旋轉90°
            axisY2.RelativePosition = -20;
        }
        //圖形顏色
        //sty1.ColorEach = false;
        //sty2.ColorEach = false;

        //查詢語句
        //string SelectStr = "select  month,Allcount,fee from chart";

        DS.Clear();
        try
        {
            DS = GetDataSet(SelectStr);
        }
        catch (Exception e)
        {
            Response.Write(e);
        }

        if (SeriesCount == 1)
        {
            chart.Series[0].DataSource = DS.Tables[0];
            chart.Series[0].LabelMember = DS.Tables [0].Columns[0].ToString();
            chart.Series[0].YValues.DataMember = "Allcount";
        }

        if (SeriesCount == 2)
        {
            //第一種方法：(畫曲線)
            //添加一個series系列
            //chart.Series.Add(sty1);
            chart.Series[0].DataSource = DS.Tables[0];
            chart.Series[0].LabelMember = "month";
            chart.Series[0].YValues.DataMember = "Allcount";

            //chart.Series.Add(sty2);
            chart.Series[1].DataSource = DS.Tables[0];
            chart.Series[1].LabelMember = "month";
            chart.Series[1].YValues.DataMember = "fee";
        }
}

protected void Button3_Click(object sender, EventArgs e) //查詢
    {
        styles = 2;
        YaxixCount = 2;
        SeriesCount = 2;
        string sqlStr = "select  month,Allcount,fee from chart where month between '" + DropDownList1.SelectedItem.Text.ToString() + "' and '" + DropDownList2.SelectedItem.Text.ToString() + "'";
        DrawBar(sqlStr);
    }

創建 GetChart.aspx
protected void Page_Load(object sender, EventArgs e)
    {
        string chartName=Request.QueryString["Chart"];              
        if (Session[chartName]!=null)             
        {                 
            System.IO.MemoryStream chartStream = new System.IO.MemoryStream();             
            chartStream=((System.IO.MemoryStream)Session[chartName]);                 
            Response.OutputStream.Write(chartStream.ToArray(),0,(int)chartStream.Length);                 
            chartStream.Close();                 
            Session.Remove(chartName);             
        } 
    }