TeeChart的用法

/// <summary>
    /// 获得数据集
    /// </summary>
    /// <param name="sqlStr">传递查询语句</param>
    /// <returns>返回数据集</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>
    /// 绘制统计图
    /// </summary>
    /// <param name="SelectStr">Sql查询语句</param>
    private void DrawBar(string SelectStr)
    {
        Chart chart = WebChart1.Chart;
        DataSet DS = new DataSet();
        //显示图片的格式，默认PNG
        WebChart1.PictureFormat = Steema.TeeChart.Export.PictureFormats.Bitmap;
        //设置保存数据形式，默认File，一般选session。Chart.Aspect(外观属性)
        WebChart1.TempChart = Steema.TeeChart.Web.TempChartStyle.Session;
        //获取显示图片文件
        WebChart1.GetChartFile = "GetChart.aspx";
        //整个图表的高度
        WebChart1.Height = 300;
        //整个图表的宽度
        WebChart1.Width = 600;

        //显示图片的格式，默认PNG
        WebChart1.PictureFormat = Steema.TeeChart.Export.PictureFormats.Bitmap;      
        //设置保存数据形式，默认File，一般选session。Chart.Aspect(外观属性)
        WebChart1.TempChart = Steema.TeeChart.Web.TempChartStyle.Session;

        //图表底色开始颜色
        //WebChart1.Chart.Panel.Gradient.StartColor = Color.Blue;//图表底色开始颜色

        //设置图形标题
        WebChart1.Chart.Header.Text = "个人每月开销数目柱形图";
        //设置X轴标题
        WebChart1.Chart.Axes.Bottom.Title.Text = "月份(月)";
        //设置Y1轴标题
        WebChart1.Chart.Axes.Left.Title.Text = "金额(元)";
        WebChart1.Chart.Axes.Left.Labels.ValueFormat = "#M/N";
        //参纵坐标轴是否显示
        WebChart1.Chart.Axes.Bottom.Grid.Visible = false ;
        //横坐标字体倾斜角度0~360
        WebChart1.Chart.Axes.Bottom.Labels.Angle= 30;
        //图表左边距
        WebChart1.Chart.Panel.MarginLeft = 15;
        //图例间是否有间隔线
        WebChart1.Chart.Legend.DividingLines.Visible = true;
        //图形显示比例(好像无反应)
        //WebChart1.Chart .Aspect .Zoom  = 10;

        WebChart1.Dispose();

        //是否立体显示
        WebChart1.Chart.Aspect.View3D = false;

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

        if (styles == 1)
        {
            //画柱状图
            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)
        {
            //画折线图
            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);
        }

        //添加第二个纵坐标
        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;//坐标轴颜色
            axisY2.Title.Text = "数量";
            axisY2.Title.Font.Color = Color.Blue;  //坐标轴标题颜色
            axisY2.Title.Font.Bold = false;
            axisY2.Title.Angle = 90;//旋转90°
            axisY2.RelativePosition = -20;
        }
        //图形颜色
        //sty1.ColorEach = false;
        //sty2.ColorEach = false;

        //查询语句
        //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)
        {
            //第一种方法：(画曲线)
            //添加一个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) //查询
    {
        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);
    }

创建 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);             
        } 
    }