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在asp.net中如何自己编写highcharts图表导出到自己的服务器上来
1.准备工作：
网上下载highcharts导出的关键dll。
1）、Svg.dll：因为highcharts的格式其实就是一个xml，采用svg的方式画图；
2）、itextsharp.dll：这样主要是用于处理和提取highcharts图表内的文字以及编码问题；
2.创建一个简单asp.net项目，并把上述两个程序集引入到项目中，OK。
3.给出页面代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="HCExport.aspx.cs" Inherits="HighCharts_Web.HCExport" ValidateRequest="false" %><!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> <script type="text/javascript" src=http://www.mamicode.com/"Scripts/highcharts/jquery-1.8.3.min.js"></script> <script type="text/javascript" src=http://www.mamicode.com/"Scripts/highcharts/highcharts.js"></script> <script type="text/javascript" src=http://www.mamicode.com/"Scripts/highcharts/exporting.js"></script> <script type="text/javascript"> var chart; $(function () { $(document).ready(function () { chart = new Highcharts.Chart({ chart: { renderTo: ‘container‘, plotBackgroundColor: null, plotBorderWidth: null, plotShadow: false }, title: { text: ‘Browser market shares at a specific website, 2010‘ }, tooltip: { pointFormat: ‘{series.name}: <b>{point.percentage}%</b>‘, percentageDecimals: 1 }, plotOptions: { pie: { allowPointSelect: true, cursor: ‘pointer‘, dataLabels: { enabled: true, color: ‘#000000‘, connectorColor: ‘#000000‘, formatter: function () { return ‘<b>‘ + this.point.name + ‘</b>: ‘ + this.percentage + ‘ %‘; } }, showInLegend: true //是否显示图例 } }, exporting: { filename: ‘mychart‘, url: "/HCExport.aspx" }, series: [{ type: ‘pie‘, name: ‘Browser share‘, data: [ [‘Firefox‘, 45.0], [‘IE‘, 26.8], { name: ‘Chrome‘, y: 12.8, sliced: true, selected: true }, [‘Safari‘, 8.5], [‘Opera‘, 6.2], [‘Others‘, 0.7] ] }] }); }); }); </script></head><body> <div id="container" style="min-width: 400px; height: 400px; margin: 0 auto"> </div> <div style="text-align:center; width:100%;"> <input type="button" value=http://www.mamicode.com/"保存图表至服务器（默认保存为PNG格式可自行调整)" onclick="SaveChart()" /> </div> <script type="text/javascript" language="javascript"> //也可以直接用异步提交方式，这样可以防止页面刷新 function ExportChart() { $.ajax( { type: ‘POST‘, //post方式异步提交 async: false, //同步提交 url: "/highcharts_export.aspx", //导出图表的服务页面地址 dataType: "json", //传递方式为json //几个重要的参数 如果这里不传递width的话，需要修改导出服务页面内的Request.Form["width"].ToString() 把这句代码注释掉即可 data: { type: ‘image/png‘, filename: ‘MyChartTest‘, width: 400, svg: chart.getSVG() }, success: function (msg) { alert("图表导出成功!"); }, error: function (errorMsg) { if (errorMsg.statusText == "OK") { alert("图表导出成功!"); } else { alert("图表导出失败!"); } } } ); } //保存图表 function SaveChart() { chart.exportChart({ type: ‘image/png‘, filename: ‘mychart‘ }); } </script></body></html>
4.服务器上的代码：
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.IO;using System.Text;using System.Drawing.Imaging;using iTextSharp.text.pdf;using iTextSharp.text;using Svg;using System.Xml;namespace HighCharts_Web{ public partial class HCExport : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { //判断参数是否正确 //type是可以自己指定的导出类型 //svg是默认传递的 //filename是可以自己指定的文件名 if (Request.Form["type"] != null && Request.Form["svg"] != null && Request.Form["filename"] != null) { //获得相应参数 string tType = Request.Form["type"].ToString(); string tSvg = Request.Form["svg"].ToString(); string tFileName = Request.Form["filename"].ToString(); if (tFileName == "") { tFileName = "chart"; } //将svg转换为二进制流 MemoryStream tData = http://www.mamicode.com/new MemoryStream(Encoding.ASCII.GetBytes(tSvg));""; string tTypeString = ""; //获取导出类型 switch (tType) { case "image/png": tTypeString = "-m image/png"; tExt = "png"; break; case "image/jpeg": tTypeString = "-m image/jpeg"; tExt = "jpg"; break; case "application/pdf": tTypeString = "-m application/pdf"; tExt = "pdf"; break; case "image/svg+xml": tTypeString = "-m image/svg+xml"; tExt = "svg"; break; } if (tTypeString != "") { string tWidth = Request.Form["width"].ToString(); SvgDocument tSvgObj = SvgDocument.Open<SvgDocument>(tData); switch (tExt) { case "jpg": tSvgObj.Draw().Save(tStream, ImageFormat.Jpeg); //DELETING SVG FILE //if (File.Exists(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tSvgOuputFile)) //{ // File.Delete(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tSvgOuputFile); //} break; case "png": tSvgObj.Draw().Save(tStream, ImageFormat.Png); ////DELETING SVG FILE //if (File.Exists(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tSvgOuputFile)) //{ // File.Delete(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tSvgOuputFile); //} break; case "pdf": PdfWriter tWriter = null; Document tDocumentPdf = null; try { // First step saving png that would be used in pdf tSvgObj.Draw().Save(tStream, ImageFormat.Png); // Creating pdf document tDocumentPdf = new Document(new iTextSharp.text.Rectangle((float)tSvgObj.Width, (float)tSvgObj.Height)); // setting up margin to full screen image tDocumentPdf.SetMargins(0.0f, 0.0f, 0.0f, 0.0f); // creating image iTextSharp.text.Image tGraph = iTextSharp.text.Image.GetInstance(tStream.ToArray()); tGraph.ScaleToFit((float)tSvgObj.Width, (float)tSvgObj.Height); tStream = new MemoryStream(); // Insert content tWriter = PdfWriter.GetInstance(tDocumentPdf, tStream); tDocumentPdf.Open(); tDocumentPdf.NewPage(); tDocumentPdf.Add(tGraph); tDocumentPdf.CloseDocument(); //// deleting png //if (File.Exists(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tOutputFile.Substring(0, tOutputFile.LastIndexOf(".")) + ".png")) //{ // File.Delete(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tOutputFile.Substring(0, tOutputFile.LastIndexOf(".")) + ".png"); //} //// deleting svg //if (File.Exists(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tSvgOuputFile)) //{ // File.Delete(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tSvgOuputFile); //} } catch (Exception ex) { throw ex; } finally { //正确释放资源 tDocumentPdf.Close(); tDocumentPdf.Dispose(); tWriter.Close(); tWriter.Dispose(); tData.Dispose(); tData.Close(); } break; case "svg": tStream = tData; break; } //if (File.Exists(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tOutputFile)) //{ //Putting session to be able to delete file in temp directory //Session["sFileToTransmit_highcharts_export"] = File.ReadAllBytes(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tOutputFile); //First step deleting disk file; //File.Delete(Server.MapPath(null) + ConfigurationManager.AppSettings["EXPORT_TEMP_FOLDER"].ToString() + tOutputFile); //保存图表路径 可以自己指定 tFileName = Server.MapPath("~/Report/") + tFileName + "." + tExt; Response.ClearContent(); Response.ClearHeaders(); Response.ContentType = tType; //Response.AppendHeader("Content-Disposition", "attachment; filename=" + tFileName + "." + tExt + ""); //将二进制流保存为指定路径下的具体文件 System.IO.File.WriteAllBytes(tFileName, tStream.ToArray()); //Response.BinaryWrite(tStream.ToArray()); Response.Write("恭喜您，highcharts导出成功，路径为" + tFileName); Response.End(); //} } } } } }}5，这样就可以将图表下载到服务器的Report文件夹中了，ok，不谢！
6。着力推荐关于本文中所解决的问题，让更多的爱好者都能学习到如此经典的方式。本文也是借鉴的。
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在asp.net中如何自己编写highcharts图表导出到自己的服务器上来
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