ASP.NET中的chart控件绑定SQL Server数据库

时间：2023-03-26 21:12:14

网上很多的chart控件的实例都没有绑定数据库，经过一番摸索后，终于实现了chart控件绑定数据库。

首先，在Visual Studio中建立一个网站，新建一个WebForm项目，名称为ChartTest1.aspx

前台：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ChartTest1.aspx.cs" Inherits="ChartTest1" %>

<%@ Register Assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"

    Namespace="System.Web.UI.DataVisualization.Charting" TagPrefix="asp" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title></title>

</head>

<body>

    <form id="form1" runat="server">

    <div>

    <asp:Chart ID="Chart1" runat="server">

    <Titles>

                <asp:Title Font="微软雅黑, 16pt" Name="Title1" Text="****统计表">

                </asp:Title>

            </Titles>

            <borderskin skinstyle="Emboss"></borderskin>

        <Series>

            <asp:Series Name="Series1"  ChartType="Bubble" MarkerSize="" MarkerStyle="Circle">

                </asp:Series>

        </Series>

       <ChartAreas>

                <asp:ChartArea Name="ChartArea1"  BorderColor="64, 64, 64, 64" BackSecondaryColor="Transparent" BackColor="64, 165, 191, 228" ShadowColor="Transparent" BackGradientStyle="TopBottom">

                </asp:ChartArea>

            </ChartAreas>

    </asp:Chart>

        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />

    </div>

    </form>

</body>

</html>

后台代码：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.Drawing;

using System.Data.SqlClient;

using System.Configuration;

using System.Data.OleDb;

public partial class ChartTest1 : System.Web.UI.Page

{

    public static string conn = "Data Source=(local);Integrated Security=True;Initial Catalog=HESDK1";

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    //创建一张二维数据表

        /// <summary>

        /// 创建一张二维数据表

        /// </summary>

        /// <returns>Datatable类型的数据表</returns>

        DataTable CreatData()

        {

            DataTable dt = new DataTable();

            //实例化SqlConnection对象

            SqlConnection sqlCon = new SqlConnection();

            //实例化SqlConnection对象连接数据库的字符串

            sqlCon.ConnectionString = conn;

            //定义SQL语句

            //sql公用部分

            string sqlQ = "select TO_c,Plc_c from History ";

           // DataTable tb = ADO.GetDataTable(sqlQ);

            dt = GetDataTable(sqlQ);

            return dt;

        }

        //数据库查询返回datatable

        public static DataTable GetDataTable(string Sqlstr)

        {

            DataTable dt;

            SqlDataAdapter sda;

            SqlConnection sqlCon = new SqlConnection();

            //实例化SqlConnection对象连接数据库的字符串

            sqlCon.ConnectionString = conn;

            sqlCon.Open();

            sda = new SqlDataAdapter(Sqlstr, conn);

            //sda.SelectCommand.CommandTimeout = 120;

            dt = new DataTable();

            sda.Fill(dt);

            sqlCon.Close();

            return dt;

        }

       protected void Button1_Click(object sender, EventArgs e)

       {

           SqlConnection connection = new SqlConnection(conn);

           // 折线图

           DataTable dt = CreatData();

           // #region 折线图

           Chart1.DataSource = dt;//绑定数据

           Chart1.Series["Series1"].ChartType = System.Web.UI.DataVisualization.Charting.SeriesChartType.Line;//设置图表类型

           Chart1.Series[].XValueMember = "TO_c";//X轴数据成员列

           Chart1.Series[].YValueMembers = "Plc_c";//Y轴数据成员列

           Chart1.ChartAreas["ChartArea1"].AxisX.Title = "温度";//X轴标题

           Chart1.ChartAreas["ChartArea1"].AxisX.TitleAlignment = StringAlignment.Far;//设置Y轴标题的名称所在位置位远

           Chart1.ChartAreas["ChartArea1"].AxisY.Title = "压力";//Y轴标题

           Chart1.ChartAreas["ChartArea1"].AxisY.TitleAlignment = StringAlignment.Far;//设置Y轴标题的名称所在位置位远

           Chart1.ChartAreas["ChartArea1"].AxisX.Interval = ;//X轴数据的间距

           Chart1.ChartAreas["ChartArea1"].AxisX.MajorGrid.Enabled = false;//不显示竖着的分割线

           Chart1.Series[].IsValueShownAsLabel = true;//显示坐标值

           // #endregion

          /*

           Chart1.Series["Series1"].ChartType = System.Web.UI.DataVisualization.Charting.SeriesChartType.Line;//设置图表类型

           string mySelectQuery = "SELECT TO_c,Plc_c FROM History;";

           SqlConnection connection = new SqlConnection(conn);

           SqlCommand myCommand = new SqlCommand(mySelectQuery, connection);

           myCommand.Connection.Open();

           SqlDataReader myReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection);

           Chart1.DataBindTable(myReader, "TO_c");

           myReader.Close();

           myCommand.Connection.Close();

           * */

       }

}

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