在DotNet Forms Asp.net中导出HighCharts

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using DotNet.Highcharts;
using DotNet.Highcharts.Options;
using DotNet.Highcharts.Enums;
using DotNet.Highcharts.Helpers;

public partial class ExportChart : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // 获取HighCharts图表数据
        var chartData = GetChartData();

        // 创建HighCharts图表
        var chart = new Highcharts("chart")
            .InitChart(new Chart { DefaultSeriesType = ChartTypes.Column })
            .SetTitle(new Title { Text = "Sample Chart" })
            .SetXAxis(new XAxis { Categories = chartData.Categories.ToArray() })
            .SetSeries(chartData.Series.ToArray());

        // 生成图像
        var chartImage = chart.ToImageBase64String();

        // 将图像转换为字节数组
        var imageData = Convert.FromBase64String(chartImage);

        // 将图像保存到文件
        var filePath = Server.MapPath("~/Charts/chart.png");
        File.WriteAllBytes(filePath, imageData);

        // 提供图像下载
        Response.ContentType = "image/png";
        Response.AppendHeader("Content-Disposition", "attachment; filename=chart.png");
        Response.TransmitFile(filePath);
        Response.End();
    }

    private ChartData GetChartData()
    {
        // 在这里获取HighCharts图表数据的逻辑
        // 返回一个包含图表数据的ChartData对象
        // 可以根据需要自定义ChartData类的结构

        // 示例数据
        var categories = new[] { "Category 1", "Category 2", "Category 3" };
        var series = new[]
        {
            new Series { Name = "Series 1", Data = new Data(new object[] { 1, 2, 3 }) },
            new Series { Name = "Series 2", Data = new Data(new object[] { 4, 5, 6 }) }
        };

        return new ChartData { Categories = categories, Series = series };
    }
}

public class ChartData
{
    public string[] Categories { get; set; }
    public Series[] Series { get; set; }
}

public class Series
{
    public string Name { get; set; }
    public Data Data { get; set; }
}