C#绘制曲线图和柱状图,在CSDN下了段代码！不知道如何用！请指点

C#绘制曲线图和柱状图,在CSDN下了段代码！不知道怎么用！请各位高手指点！
我想窗体一加载的时候就画图！画不了！请各位高手帮忙指点一下！

C# code

  private void Form1_Load(object sender, EventArgs e)        {///这里应该怎么调用，怎么样写！请各位帮忙！俺是菜鸟！           } public Image Render(string title, int width, int height, DataTable chartTable)        {            Bitmap bm = new Bitmap(width,height);            Graphics g = Graphics.FromImage(bm);            g.Clear(Color.White);            const int top = 30;            const int left = 35;            if (width &lt; left * 2 || height &lt; top * 2)            {                g.DrawString("绘画区域太小",new Font("Tahoma",8),Brushes.Red,new PointF(0,0));                return bm;            }            if (chartTable == null)            {                g.DrawString("没有数据",new Font("Tahoma",7),Brushes.Blue,new PointF(0,0));                return bm;            }            DataTable dt = chartTable;            //计算最高点            float highPoint = 1;            foreach (DataRow dr in dt.Rows)            {                if (highPoint &lt;float.Parse(Convert.ToString(dr[0])))                {                    highPoint = float.Parse(Convert.ToString(dr[0]));                }                //if (highPoint &lt; float.Parse(Convert.ToString(dr[1])))                //{                //    highPoint = float.Parse(Convert.ToString(dr[1]));                //}            }            try            {                //画大标题                g.DrawString(title, new Font("Tahoma", 12), Brushes.Black, new PointF(2, 2));                StringFormat drawFormat = new StringFormat();                drawFormat.FormatFlags = StringFormatFlags.DirectionVertical;                g.DrawString("红--" + dt.Columns[0].ToString() + "]", new Font("Tahoma", 8), Brushes.Red, new PointF(2, top), drawFormat);                //画条形图                float barWidth = (float.Parse(Convert.ToString(width)) - left) / (dt.Rows.Count + 1);                PointF barOrigin = new PointF(left + barWidth, 0);                float barHeigh = dt.Rows.Count;                float topFontSize = 7;                float bottomFontSize = 7;                PointF[] pt1 = new PointF[dt.Rows.Count];                PointF[] pt2 = new PointF[dt.Rows.Count];                for (int i = 0; i &lt; dt.Rows.Count; i++)                {                    //底部字体大小                    barHeigh =int.Parse(Convert.ToString(dt.Rows[i][0])) * (height - 2 * top) / highPoint * 1;                    barOrigin.Y = height - barHeigh - top;                    g.FillEllipse(new SolidBrush(Color.Red), barOrigin.X - 3, barOrigin.Y - 3, 6, 6);                    pt1[i] = new PointF(barOrigin.X, barOrigin.Y);                    g.DrawString(dt.Rows[i][0].ToString(), new Font("Tahoma", topFontSize), Brushes.Red, new PointF(barOrigin.X, barOrigin.Y - 4 * topFontSize / 2));                    barHeigh =int.Parse(Convert.ToString(dt.Rows[i][1])) * (height - 2 * top) / highPoint * 1;                    barOrigin.Y = height - barHeigh - top;                    g.FillEllipse(new SolidBrush(Color.Blue), barOrigin.X - 3, barOrigin.Y - 3, 6, 6);                    pt2[i] = new PointF(barOrigin.X, barOrigin.Y);                    //顶部                    g.DrawString(dt.Rows[i][1].ToString(), new Font("Tahoma", topFontSize), Brushes.Blue, new PointF(barOrigin.X, barOrigin.Y - 4 * topFontSize / 2));                    barOrigin.X = barOrigin.X + barWidth;                }                if (dt.Rows.Count &gt; 10)                {                    int dis = dt.Rows.Count / 10;                    for (int i = 0; i &lt; dt.Rows.Count; i++)                    {                        if (i % dis == 0)                        {                            g.DrawLine(new Pen(Color.Blue, 2), new PointF(left+(i+1)*barWidth,height-top+5), new PointF(left + (i + 1) * barWidth, height - top - 3));                            //底部                            g.DrawString(dt.Rows[i][2].ToString(), new Font("Tahoma", bottomFontSize), Brushes.Black, new PointF(left + (i + 1) * barWidth, height - top));                        }                        else                        {                            g.DrawLine(new Pen(Color.Gray, 1), new PointF(left + (i + 1) * barWidth, height - top + 3), new PointF(left + (i + 1) * barWidth, height - top - 3));                        }                    }                }                else                {                    for (int i = 0; i &lt; dt.Rows.Count; i++)                    {                        g.DrawLine(new Pen(Color.Gray, 1), new PointF(left + (i + 1) * barWidth, height - top + 3), new PointF(left + (i + 1) * barWidth, height - top - 3));                    }                }                //绘制曲线                g.DrawLines(new Pen(new SolidBrush(Color.Red), 1), pt1);                g.DrawLines(new Pen(new SolidBrush(Color.Red), 1), pt2);                //设置边                g.DrawLine(new Pen(Color.Blue, 2), new Point(left, top), new Point(left, height - top));                g.DrawLine(new Pen(Color.Blue, 2), new Point(left, height - top), new Point(left + width, height - top));                g.Dispose();                return bm;            }            catch            {                return bm;            }                    }

[解决办法]
在
Form1_Paint事件里面

Image img = Render("test", ....);
e.Graphics.DrawImage(img..);

参数自己看MSDN
[解决办法]
.........
[解决办法]
楼主可以在窗体中加一个picturebox控件，然后在form_load事件中添加如下代码：

private void Form1_Load(object sender, EventArgs e)
{
pictureBox1.ImageLocation = "http://chart.apis.google.com/chart?cht=p3&chd=t:75,25&chs=450x200&chl=Evil|Good&chtt=2008pts";
}

说明：这里调用的是google chart服务，一个简单的demo
[解决办法]
用这个吧方便快捷
http://www.51aspx.com/CV/WebChart/
[解决办法]
首先DataTable chartTable要有值，曲线图和柱状图才能绘制啊！你贴的代码是我博客上的代码。
[解决办法]
http://www.cnblogs.com/ziyiFly/archive/2008/09/24/1297841.html C# 绘制统计图(柱状图, 折线图, 扇形图)

C#绘制曲线图和柱状图,在CSDN下了段代

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