c#实现amcharts图片导出(.NET版)

实现amcharts导出图片功能详解：

1、控件属性设置

至于控件如何加载到项目中我就不在多说了！baidu吧！

右键点击选控件属性，找到ExportAsImageEnabled设置成true，找到ExportAsImageMessageText设置成导出图片

2、XX_settings.xml设置

在amcharts目录下找到对应的xml文件，填写<file></file>和<target></target>完成设置

注意路径要写对

<export_as_image> <file>ampie/export.aspx</file> <target>_blank</target> <x></x> <y></y> <color></color> <alpha></alpha> <text_color></text_color> <text_size></text_size> </export_as_image>

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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="export.aspx.cs" Inherits="_export" %> aspx.cs文件 using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System; using System.Web; using System.Drawing; using System.Drawing.Imaging; namespace amCharts { public partial class _export : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (Request.Form["width"] != null && Request.Form["width"] != String.Empty) { // image dimensions int width = Int32.Parse((Request.Form["width"].IndexOf('.') != -1) ? Request.Form["width"].Substring(0, Request.Form["width"].IndexOf('.')) : Request.Form["width"]); int height = Int32.Parse((Request.Form["height"].IndexOf('.') != -1) ? Request.Form["height"].Substring(0, Request.Form["height"].IndexOf('.')) : Request.Form["height"]); // image Bitmap result = new Bitmap(width, height); // set pixel colors for (int y = 0; y < height; y++) { // column counter for the row int x = 0; // get current row data string[] row = Request.Form["r" + y].Split(new char[] { ',' }); // set pixels in the row for (int c = 0; c < row.Length; c++) { // get pixel color and repeat count string[] pixel = row[c].Split(new char[] { ':' }); Color current_color = ColorTranslator.FromHtml("#" + pixel[0]); int repeat = pixel.Length > 1 ? Int32.Parse(pixel[1]) : 1; // set pixel(s) for (int l = 0; l < repeat; l++) { result.SetPixel(x, y, current_color); x++; } } } // output image // image type Response.ContentType = "image/jpeg"; Response.AddHeader("Content-Disposition", "attachment; filename=/"amchart.jpg/""); // find image encoder for selected type ImageCodecInfo[] encoders; ImageCodecInfo img_encoder = null; encoders = ImageCodecInfo.GetImageEncoders(); foreach (ImageCodecInfo codec in encoders) if (codec.MimeType == Response.ContentType) { img_encoder = codec; break; } // image parameters EncoderParameter jpeg_quality = new EncoderParameter(Encoder.Quality, 100L); // for jpeg images only EncoderParameters enc_params = new EncoderParameters(1); enc_params.Param[0] = jpeg_quality; result.Save(Response.OutputStream, img_encoder, enc_params); } else { // invalid post Response.Write("Invalid post"); } } } }

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至此项目就可以导出图片了！

在页面中点击右键就可以看到“导出图片”的选项。

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