場景：asp.net中使用Highcharts圖表，使用Tek4.Highcharts.Exporting匯出服務。

問題：使用Highcharts匯出圖片，圖片上的中文全是亂碼。

分析：出現亂碼100%是編碼的問題。

解決方案：

Tek4.Highcharts.Exporting.Exporter.cs

 internal Exporter(
      string fileName, 
      string type, 
      int width, 
      string svg)
    {
      string extension;

      this.ContentType = type.ToLower();
      this.Name = fileName;
      this.Svg = svg;
      this.Width = width;

      // Validate requested MIME type.
      switch (ContentType)
      {
        case "image/jpeg":
          extension = "jpg";
          break;

        case "image/png":
          extension = "png";
          break;

        case "application/pdf":
          extension = "pdf";
          break;

        case "image/svg+xml":
          extension = "svg";
          break;

        // Unknown type specified. Throw exception.
        default:
          throw new ArgumentException(
            string.Format("Invalid type specified: '{0}'.", type));
      }

      // Determine output file name.
      this.FileName = string.Format(
        "{0}.{1}",
        string.IsNullOrEmpty(fileName) ? DefaultFileName : fileName,
        extension);

      // Create HTTP Content-Disposition header.YH 2012.08.07
      // 用utf8編碼，解決中文名稱亂碼問題
      this.ContentDisposition =
          string.Format("attachment; filename={0}", HttpUtility.UrlEncode(System.Text.UTF8Encoding.UTF8.GetBytes(this.FileName)));
    }
 

把編碼格式換成UTF8.

問題搞定。