C＃中的图形表示 [英] Graph presentation in C#

问题描述

hai

i试图在C＃编码中编写用于从mysql数据库数据中呈现图形的编码，但是我得到的错误就像图表1在当前上下文中并不令人兴奋。



我不知道如何清除错误如果您有任何想法请回复我



我附上以下代码我用

hai
i have tried to write the coding for presenting a graph from mysql database data in C# coding but i get the error like chart1 is not excit in the current context.

I don''t know how to clear the error if u have any idea please reply me

I attached the following code I did

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Web;
//using System.Web.UI;
//using System.Web.UI.WebControls;
using System.Windows.Forms.DataVisualization.Charting;
using MySql.Data.MySqlClient;

namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
   
        public Form1()
        {
            InitializeComponent();
            MySqlConnection con = new MySqlConnection();
            //Chart Chart1.Series["Series1"].ChartType = SeriesChartType.Column;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Chart1.Series["Series1"].ChartType = SeriesChartType.Column;
            try
            {
            // TODO: This line of code loads data into the 'testDataSet.periodicdata' table. You can move, or remove it, as needed.
            this.periodicdataTableAdapter.Fill(this.testDataSet.periodicdata);
             MySqlConnection con = new MySqlConnection();
            con.ConnectionString = "server=localhost;user id=root;password=vinoth;database=test";
            MySqlCommand cmd = new MySqlCommand();

           
                //con.ConnectionString = "server=localhost;user id=root;password=******;database=test";
                //con.ConnectionString = "server=.\\mysqlexpress;database=test;integrated security=true;";
                con.Open();
        
            }
            catch (Exception ex) { MessageBox.Show(ex.ToString()); }
        }


        private void button1_Click(object sender, EventArgs e)
        {
            Chart1.Series["Series1"].ChartType = SeriesChartType.Column;
            Chart1.Series["Series1"]["DrawingStyle"] = "Emboss";
            //Chart1.ChartAreas["ChartArea1"].Area3DStyle.Enable3D = true;
            Chart1.Series["Series1"].IsValueShownAsLabel = true;

            FillData();
        }

        private void FillData()
        {
            DataTable dt = new DataTable();
            DataColumn dc;

            dc = new DataColumn();
            dc.ColumnName = "date_time";
            dt.Columns.Add(dc);
            dc = new DataColumn();
            dc.ColumnName = "Volt1";
            dt.Columns.Add(dc);

            Chart1.DataSource = dt;
            Chart1.Series["Series1"].XValueMember = "date_time";
            Chart1.Series["Series1"].YValueMembers = "Volt1";
            Chart1.DataBind();
            //throw new NotImplementedException();
        }
    }
}

推荐答案

尝试使用zedgraph，请看这个链接： ZedGraph在中型信任环境中的C＃Web应用程序中 [ ^ ]



祝你好运，

z3ngew

Try using zedgraph, see this link: ZedGraph in a C# web application in a Medium trust environment[^]

Good Luck,
z3ngew

检查这个

ASP.NET 4.0图表控件 [< a href =http://www.codeproject.com/Articles/235117/ASP-NET-4-0-Chart-Controltarget =_ blanktitle =New Window> ^ ]

你好，你可以使用ajax new functina直接绘制图形用于绘制图形的lity。

hello you can direct draw graph by using ajax new functinality for drawing graph.

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