代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace YNRBSYS.SysManage
{
    public partial class FrmText : Form
    {
        string stcd = "10911000";
        string dtStart = "";
        string dtEnd = "";
        string flag = "";
        DataTable dt = new DataTable();
        int showCount = 0;

        public FrmText()
        {
            InitializeComponent();
            BindStcd();
            this.comboBox1.SelectedIndexChanged += new EventHandler(comboBox1_SelectedIndexChanged);
        }

        /// <summary>
        /// 设置选择项索引
        /// </summary>
        private void SetStcdIndex()
        {
            DataTable dt = (DataTable)this.comboBox1.DataSource;
            if (dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    if (stcd.Trim().Equals(dt.Rows[i]["stcd"].ToString().Trim()))
                    {
                        this.comboBox1.SelectedIndex = i;
                        break;
                    }
                }
            }
        }

        /// <summary>
        /// 测站列表选择事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            this.stcd = this.comboBox1.SelectedValue.ToString();
            this.dtStart = this.dateTimePicker1.Value.ToString();
            this.dtEnd = this.dateTimePicker2.Value.ToString();
            LoadData();
            if (flag == "rz")
            {
                DrawSw();
            }
            else if (flag == "inq")
            {
                DrawRk();
            }
            else if (flag == "otq")
            {
                DrawCk();
            }
            else
            {
                DrawZh();
            }
            showCount++;
        }

        /// <summary>
        /// 邦定水库名称站码
        /// </summary>
        private void BindStcd()
        {
            string sql = "select stcd,stnm from st_stbprp_b where sttp='RR'";
            DataSet ds = SQLHelper.ExecuteDataset(SQLHelper.ConnCCSYQ, CommandType.Text, sql);
            if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
            {
                this.comboBox1.DataSource = ds.Tables[0];
                this.comboBox1.DisplayMember = "stnm";
                this.comboBox1.ValueMember = "stcd";
            }
        }
        /// <summary>
        /// 初始化方法
        /// </summary>
        private void LoadData()
        {

            string sql = "select a.tm, a.rz,a.inq,a.w,a.otq from st_rsvr_r a inner join " +
                        "st_stbprp_b b on a.stcd=b.stcd where a.stcd='" + stcd + "'  and a.tm>'"+dtStart+"' and a.tm<'"+dtEnd+"'";
            DataSet ds = SQLHelper.ExecuteDataset(SQLHelper.ConnCCSYQ, CommandType.Text, sql);
            if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
            {
                dt = ds.Tables[0];
                this.dataGridViewX1.DataSource = dt.DefaultView;
            }

            this.dtStart = this.dateTimePicker1.Text;
            this.dtEnd = this.dateTimePicker2.Text;

            //string sql111 = "select drp, tm from st_pptn_r where stcd='10911000' and tm>'2010-8-19' and tm<'2010-8-26'";
            //DataSet ds111 = SQLHelper.ExecuteDataset(SQLHelper.ConnCCSYQ, CommandType.Text, sql111);
            //if (ds111.Tables.Count > 0 && ds111.Tables[0].Rows.Count > 0)
            //{
            //    dt111 = ds111.Tables[0];
            //}
        }

        /// <summary>
        /// 设置参数
        /// </summary>
        private void SetDraw()
        {
            zed.LineItemList();
            zed.Title = this.comboBox1.Text+"水库综合线图";
            zed.TitleColor = Color.Red;
            zed.IsShowPointValues(true);
            zed.SymbolTypeSize = 5;
            //zed.IsShowCursorValues(true);
        }

        /// <summary>
        /// 画线
        /// </summary>
        private void Draw()
        {
            DateTime maxtime = Convert.ToDateTime(dt.Rows[dt.Rows.Count - 1]["tm"]);
            DateTime mintime = Convert.ToDateTime(dt.Rows[0]["tm"]);


            zed.Step_X = 0.25;//步长为6小时
            zed.LongTime = true;
            zed.CreateChartLineItem(dt, "tm", "rz", maxtime, mintime, "水位", 1, Color.Blue);
            zed.CreateChartLineItem(dt, "tm", "inq", maxtime, mintime, "入库流量", 2, Color.Red);
            
            //zed.CreateChartLineItem(dt, "时间", "nr", 1, "出库流量", Color.Red);
            //zed.CreateChartLineItem(dt, "时间", "出库流量", maxtime, mintime, "出库流量", 2, Color.Green);

            //zed.IsSmooth = true;
            //zed.CreateChartBarItem(dt111, "tm", "drp", maxtime, mintime, "降雨量", 3, Color.Green, Color.White, false, 0.2);

        }

        /// <summary>
        /// 水位画法
        /// </summary>
        private void DrawSw()
        {
            if (showCount > 0)
            {
                zed.LineItemList();
            }
            zed.Title = this.comboBox1.Text + "水库水位过程线图";
            this.Text = this.comboBox1.Text + "水库水位过程线图";
            zed.TitleColor = Color.Red;
            zed.IsShowPointValues(true);
            zed.Y1Title = "水位(m)";
            zed.SymbolTypeSize = 5;

            DateTime maxtime = Convert.ToDateTime(dt.Rows[dt.Rows.Count - 1]["tm"]);
            DateTime mintime = Convert.ToDateTime(dt.Rows[0]["tm"]);

            zed.Step_X = 0.25;//步长为6小时
            zed.LongTime = true;
            zed.CreateChartLineItem(dt, "tm", "rz", maxtime, mintime, "水位", 1, Color.Blue);

        }

        /// <summary>
        /// 入库流量画法
        /// </summary>
        private void DrawRk()
        {
            if (showCount > 0)
            {
                zed.LineItemList();
            }
            zed.Title = this.comboBox1.Text + "水库入库流量过程线图";
            this.Text = this.comboBox1.Text + "水库入库流量过程线图"; 
            zed.TitleColor = Color.Red;
            zed.IsShowPointValues(true);
            zed.Y1Title = "入库流量(m3/s)";
            zed.SymbolTypeSize = 5;

            DateTime maxtime = Convert.ToDateTime(dt.Rows[dt.Rows.Count - 1]["tm"]);
            DateTime mintime = Convert.ToDateTime(dt.Rows[0]["tm"]);

            zed.Step_X = 0.25;//步长为6小时
            zed.LongTime = true;
            //zed.IsSmooth = false;
            zed.CreateChartLineItem(dt, "tm", "otq", maxtime, mintime, "出库流量", 1, Color.Red);
            zed.CreateChartLineItem(dt, "tm", "inq", maxtime, mintime, "入库流量", 1, Color.Blue);

        }

        /// <summary>
        /// 出库流量画法
        /// </summary>
        private void DrawCk()
        {
            if (showCount > 0)
            {
                zed.LineItemList();
            }
            zed.Title = this.comboBox1.Text + "水库出库流量过程线图";
            this.Text = this.comboBox1.Text + "水库出库流量过程线图";
            zed.TitleColor = Color.Red;
            zed.IsShowPointValues(true);
            zed.Y1Title = "出库流量(m3/s)";
            zed.SymbolTypeSize = 5;

            DateTime maxtime = Convert.ToDateTime(dt.Rows[dt.Rows.Count - 1]["tm"]);
            DateTime mintime = Convert.ToDateTime(dt.Rows[0]["tm"]);

            //zed.Step_X = 0.25;//步长为6小时
            //zed.LongTime = true;
            //zed.CreateChartLineItem(dt, "tm", "otq", maxtime, mintime, "出库流量", 1, Color.Red);

            //zed.Step_X = 1;
            zed.LongTime = true;
            zed.IsSmooth = false;
            zed.CreateChartLineItem(dt, "tm", "otq", maxtime, mintime, "出库流量", 1, Color.Red);

        }

        /// <summary>
        /// 综合图画法
        /// </summary>
        private void DrawZh()
        {
            if (showCount > 0)
            {
                zed.LineItemList();
            }
            zed.Title = this.comboBox1.Text + "水库综合过程线图";
            this.Text = this.comboBox1.Text + "水库综合过程线图";
            zed.TitleColor = Color.Red;
            zed.IsShowPointValues(true);
            zed.Y1Title = "水位(m)";
            zed.Y2Title = "流量(m3/s)";
            zed.SymbolTypeSize = 5;  //[hetao add  2011-04-02] 设置显示点的大小。

            DateTime maxtime = Convert.ToDateTime(dt.Rows[dt.Rows.Count - 1]["tm"]);
            DateTime mintime = Convert.ToDateTime(dt.Rows[0]["tm"]);

            zed.Step_X = 0.25;//步长为6小时
            zed.LongTime = true;
           
            zed.CreateChartLineItem(dt, "tm", "rz", maxtime, mintime, "水位", 1, Color.Blue);
            zed.CreateChartLineItem(dt, "tm", "inq", maxtime, mintime, "入库流量", 2, Color.Red);
            zed.IsHStack = false;                                                                   //[hetao add  2011-04-02] 使显示在Y2轴上的刻度重叠
            zed.CreateChartLineItem(dt, "tm", "otq", maxtime, mintime, "出库流量", 2, Color.Green); //[hetao add  2011-04-02]
            
            
        }

        /// <summary>
        /// 画水位过程线
        /// </summary>
        public void DrawSwGcx(string stcd)
        {
            flag = "rz";
            this.stcd = stcd;
            SetStcdIndex();
        }

        /// <summary>
        /// 画入库流量过程线
        /// </summary>
        public void DrawRkLlGcx(string stcd)
        {
            flag = "inq";
            this.stcd = stcd;
            SetStcdIndex();
        }

        /// <summary>
        /// 画出库流量过程线
        /// </summary>
        public void DrawCkLlGcx(string stcd)
        {
            flag = "otq";
            this.stcd = stcd;
            SetStcdIndex();
        }

        /// <summary>
        /// 画综合过程线
        /// </summary>
        public void DrawZhGcx(string stcd)
        {
            flag = "zh";
            this.stcd = stcd;
            SetStcdIndex();
        }
    }
}