winform的chart控制項初探

有了chart控制項，畫圖變得很簡單了。開啟屬性Series可以任意設定，畫多條線可以添加series，而其中的ChartType可以控制畫line、pie或者還是chart，還有SaveImage可以直接儲存圖片，非常方便。

再推薦一個串連：http://www.cnblogs.com/gaoweipeng/archive/2010/04/06/1704879.html

using System;

using System.Data;

using System.Test;

using System.Drawing;

using System.Drawing.Imaging;

using System.Windows.Forms;

namespace chartdemo
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            //chart1.Series.
            DataTable dt = default(DataTable);
            dt = CreateDataTable();

            //設定圖表的資料來源
            chart1.DataSource = dt;

            //設定圖表Y軸對應項
            chart1.Series[0].YValueMembers = "Volume1";
            chart1.Series[1].YValueMembers = "Volume2";

            //設定圖表X軸對應項
            chart1.Series[0].XValueMember = "Date";

            //綁定資料

            chart1.DataBind();

            //儲存圖片

            chart1.SaveImage(@"e:\1.bmp ", ImageFormat.Bmp);

        }

        private DataTable CreateDataTable()
        {
            DataTable dt = new DataTable();

            dt.Columns.Add("Date");
            dt.Columns.Add("Volume1");
            dt.Columns.Add("Volume2");

            DataRow dr;
            dr = dt.NewRow();
            dr["Date"] = "Jan";
            dr["Volume1"] = 3731;
            dr["Volume2"] = 4101;
            dt.Rows.Add(dr);

            dr = dt.NewRow();
            dr["Date"] = "Feb";
            dr["Volume1"] = 6024;
            dr["Volume2"] = 4324;
            dt.Rows.Add(dr);

            dr = dt.NewRow();
            dr["Date"] = "Mar";
            dr["Volume1"] = 4935;
            dr["Volume2"] = 2935;
            dt.Rows.Add(dr);

            dr = dt.NewRow();
            dr["Date"] = "Apr";
            dr["Volume1"] = 4466;
            dr["Volume2"] = 5644;
            dt.Rows.Add(dr);
            return dt;
        }
    }
}