在Asp.Net中使用amChart统计图

怎么在自己的ASP.NET页面插入可动态更新的数据统计图呢?网上的资源倒是不少(Fusioncharts、amCharts……),在这些资源中有一个比较好用:amChart,这个工具很炫,还能与用户交互,其繁多的统计图样式和一目了然的图形数据,一定能让你在第一眼就喜欢上这个工具。我们先来看一些这个工具的统计图效果:

柱状统计图:

 

速度模拟:

 

 

曲线统计图:

 

曲线统计图2:

 

扇形统计图:

 

点状统计图:

 

还有很多不知道是什么的统计图:

 

(效果够炫吧,去官网上下载吧:www.amcharts.com/

Amcharts官网上有很多Demo,而且是免费的。免费版本在使用的时候会在统计图的左上角显示Amcharts官网的链接。

下面我们看一个简单的例子(以JavaScript CHARTS     Version 3.4.4 ( February 20, 2014 )版本为例)

去官网下载3.4.4版本然后解压,

在samples文件夹中找到_exporting_to_multiple_formats.html这个网页,源码中,

chartData这个JSON数组是显示的统计数据,动态生成这些数据就可以做到动态的显示我们所需要统计的数据。以下是我做的的一个修改后的一个例子,源码奉上:(本人新手,高手勿喷)

前台aspx页面代码:

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

 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

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

 

    <head runat="server">

        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

        <title>amCharts examples</title>

        <link rel="stylesheet" href="css/style.css" type="text/css">

        <script src="amcharts/amcharts.js" type="text/javascript"></script>

        <script src="amcharts/serial.js" type="text/javascript"></script>

 

        <!-- scripts for exporting chart as an image -->

        <!-- Exporting to image works on all modern browsers except IE9 (IE10 works fine) -->

        <!-- Note, the exporting will work only if you view the file from web server -->

        <!--[if (!IE) | (gte IE 10)]> -->

        <script src="amcharts/exporting/amexport.js" type="text/javascript"></script>

        <script src="amcharts/exporting/rgbcolor.js" type="text/javascript"></script>

        <script src="amcharts/exporting/canvg.js" type="text/javascript"></script>

        <script src="amcharts/exporting/jspdf.js" type="text/javascript"></script>

        <script src="amcharts/exporting/filesaver.js" type="text/javascript"></script>

        <script src="amcharts/exporting/jspdf.plugin.addimage.js" type="text/javascript"></script>

        <!-- <![endif]-->       

    </head>

 

    <body>

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

        <span style="font-family: Arial; font-size: 10px; color: #CC0000;">

            <p>警告:只能在浏览器端下载统计图表文件。除了IE9可以在任何浏览器上执行,在IE10上运行最佳。</p>

        </span>

        <div id="chartdiv" style="width: 100%; height: 400px;"></div>

        </form>

    </body>

 

</html>

对应的cs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.Text;

 

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

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            chartHelper get_js = new chartHelper();//帮助类

            StringBuilder js = get_js.ChartJS();

            Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", js.ToString()); 

        }

    }

}

帮助类代码:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data;

using System.Data.SqlClient;

using System.Text;

 

/// <summary>

/// chartHelper 的摘要说明

/// </summary>

public class chartHelper

{

    public chartHelper()

    {

        //

        // TODO: 在此处添加构造函数逻辑

        //

    }

 

    public StringBuilder ChartJS()

    {

        StringBuilder return_js = new StringBuilder();

        DataTable chart_table = ChartData();

 

 

        return_js.Append("<script type=\"text/javascript\">");

        return_js.Append("var chart;");

       

        return_js.Append("var chartData = [");

        for (int i = 0; i < chart_table.Rows.Count; i++)

        {

            int TableCount = chart_table.Rows.Count;

            int ColorCount =  A_Colors().Count();           

            int yushu = i % ColorCount;

            return_js.Append("{\"pagename\": \"" + chart_table.Rows[i]["pagename"].ToString() + "\",\"visits\": " + chart_table.Rows[i]["visits"].ToString() + ",\"color\": \"" + ChartColor(yushu) + "\"},");          

           

        }

        return_js.Append("];");

 

        return_js.Append("var chart = AmCharts.makeChart(\"chartdiv\", {");

        return_js.Append("type: \"serial\",");

        return_js.Append("dataProvider: chartData,");

        return_js.Append("categoryField: \"pagename\",");

        return_js.Append("depth3D: 20,");

        return_js.Append("angle: 30,");

        return_js.Append("categoryAxis: {labelRotation: 90,gridPosition: \"start\"},");

        return_js.Append("valueAxes: [{title: \"访问次数\"}],");

        return_js.Append("graphs: [{valueField: \"visits\",colorField: \"color\",type: \"column\",lineAlpha: 0,fillAlphas: 1 }],");

        return_js.Append("chartCursor: {cursorAlpha: 0,zoomable: false,categoryBalloonEnabled: false},");

        return_js.Append("exportConfig: {menuTop: \"21px\",menuBottom: \"auto\",menuRight: \"21px\",backgroundColor: \"#efefef\",menuItemStyle: {backgroundColor: ‘#EFEFEF‘,rollOverBackgroundColor: ‘#DDDDDD‘},");

        return_js.Append("menuItems: [{textAlign: ‘center‘,icon: ‘amcharts/images/export.png‘,onclick: function () { },");

        return_js.Append("items: [{title: ‘JPG‘,format: ‘jpg‘}, {title: ‘PNG‘,format: ‘png‘}, {title: ‘SVG‘,format: ‘svg‘}, {title: ‘PDF‘,format: ‘pdf‘}]");

        return_js.Append("}] } });");

        return_js.Append("</script>");       

 

        return return_js;

    }

 

    public DataTable ChartData()

    {

        DataTable dt = new DataTable();

        dt.Columns.Add("pagename", System.Type.GetType("System.String"));

        dt.Columns.Add("visits", System.Type.GetType("System.String"));

        Random ran = new Random();

        for (int i = 0; i < 20; i++)

        {

            DataRow dr = dt.NewRow();

            dr["pagename"] = "页面" + (i + 1).ToString();

            int value = ran.Next(1, 5000);

            dr["visits"] = value.ToString();

            dt.Rows.Add(dr);

        }

        return dt;

    }

 

    public string[] A_Colors()

    {

        string[] Arry_Colors = new string[] {

            "#FF0F00",       

            "#FF6600",

            "#FF9E01",

            "#FCD202",

            "#F8FF01",

            "#B0DE09",

            "#04D215",

            "#0D8ECF",

            "#0D52D1",

            "#2A0CD0",

            "#8A0CCF",

            "#CD0D74",

            "#754DEB",

            "#DDDDDD",

            "#999999",

            "#333333",

            "#000000"       

        };

        return Arry_Colors;

    }

 

    public string ChartColor(int num)

    {

        string[] Colors = A_Colors();

        if (num > 0 && num < Colors.Count())

        {

            return Colors[num];

        }

        else

        {

            return "#FF0F00";

        }

    }

}

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