在文章“如安在ASP.NET Web API中使用FastReport.Net”中，我们已经讨论了如何创建一个用于生成报表的Web处事。然后我们会收到报表的链接，，此刻我们来看看如何获??取报表并使用ajax脚本显示它。
让我提醒你一下，我们的处事可以返回以这些格局之一导出的报表：PDF、HTML、PNG。我们将以HTML格局接收报表，并使用ajax脚本将其显示在网页上。
我们接下来讲解一下从新开始创建WebApi应用措施的过程。首先，创建一个ASP.Net应用措施，WebAPI。选择空模板并勾选选项：MVC和WebApi。
在项目引用中，添加FastReport.dll库。
我们继续创建一个数据模型。此刻Model文件夹是空的。点击右键并选择“Add”，“Class”。
将其定名为Reports.cs。添加两个字段：Id和ReportName：
namespace FastReportWebApiDemo.Models { public class Reports { // Report ID public int Id { get; set; } // Report File Name public string ReportName { get; set; } } }你需要将报表模板和数据库文件放在App_Data文件夹中。在我们的例子中，我们把这两个报表放进去：“Simple List.frx”和“Barcode.frx”；
此刻，在Controllers文件夹中，添加控制器ReportsController。它将包罗应用措施的所有逻辑。我们使用Controllers文件夹的上下文菜单执行此操纵。选择“添加” - >“控制器“：
using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Net.Http; using System.Web.Http; using FastReport; using FastReport.Export.Image; using FastReport.Export.Html; using FastReport.Export.Pdf; using FastReport.Utils; using FastReportWebApiDemo.Models; using System.Web.Hosting; using System.Data; using System.IO; using System.Net.Http.Headers; namespace FastReportWebApiDemo.Controllers { // Transfer class with parameters for requesting a report public class ReportQuery { // Format of resulting report: png, pdf, html public string Format { get; set; } // Value of "Parameter" variable in report public string Parameter { get; set; } // Enable Inline preview in browser (generates "inline" or "attachment") public bool Inline { get; set; } } public class ReportsController : ApiController { //Reports list Reports[] reportItems = new Reports[] { new Reports { Id = 1, ReportName = "Simple List.frx" }, new Reports { Id = 2, ReportName = "Barcode.frx" } }; // Get list of reports public IEnumerable<Reports> GetAllReports() { return reportItems; } // Get report by ID from request public HttpResponseMessage GetReportById(int id, [FromUri] ReportQuery query) { // Find report Reports reportItem = reportItems.FirstOrDefault((p) => p.Id == id); if (reportItem != null) { string reportPath = HostingEnvironment.MapPath("~/App_Data/" + reportItem.ReportName); string dataPath = HostingEnvironment.MapPath("~/App_Data/nwind-employees.xml"); MemoryStream stream = new MemoryStream(); try { using (DataSet dataSet = new DataSet()) { // Fill the data source with the data dataSet.ReadXml(dataPath); // Enable FastReport web mode Config.WebMode = true; using (Report report = new Report()) { report.Load(reportPath); // Load the report report.RegisterData(dataSet, "NorthWind"); // Register the data in the report if (query.Parameter != null) { report.SetParameterValue("Parameter", query.Parameter); // Set the value of the parameter in the report. The very meaning we take from the URL } // Two phases of preparation to exclude the display of any dialogs report.PreparePhase1(); report.PreparePhase2(); if (query.Format == "pdf") { // Export the report to PDF PDFExport pdf = new PDFExport(); // We use the stream to store the report so that we do not produce files report.Export(pdf, stream); } else if (query.Format == "html") { // Export the report to HTML HTMLExport html = new HTMLExport(); html.SinglePage = true; html.Navigator = false; html.EmbedPictures = true; report.Export(html, stream); } else if (query.Format == "png") { // Export the report to PNG using (ImageExport img = new ImageExport()) { img.ImageFormat = ImageExportFormat.Png; img.SeparateFiles = false; img.ResolutionX = 96; img.ResolutionY = 96; report.Export(img, stream); query.Format = "png"; } } else { WebReport webReport = new WebReport();// Create a report object webReport.Report.Load(reportPath); // Load the report webReport.Report.RegisterData(dataSet, "NorthWind"); // Register the data source in the report if (query.Parameter != null) { webReport.Report.SetParameterValue("Parameter", query.Parameter); // Set the value of the report parameter } // inline registration of FastReport javascript webReport.InlineRegistration = true; // Allows you to register scripts and styles in the body of the html-page instead of placing them in the title webReport.Width = Unit.Percentage(100); webReport.Height = Unit.Percentage(100); // get control HtmlString reportHtml = webReport.GetHtml(); // load the report into HTML byte[] streamArray = Encoding.UTF8.GetBytes(reportHtml.ToString()); stream.Write(streamArray, 0, streamArray.Length); // Write the report to the stream } } } // create the resulting variable HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK) { Content = new ByteArrayContent(stream.ToArray()) }; stream.Dispose(); result.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue(query.Inline ? "inline" : "attachment") { // Set the file extension depending on the type of export FileName = String.Concat(Path.GetFileNameWithoutExtension(reportPath), ".", query.Format) }; // Define the content type for the browser result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/" + query.Format); return result; } // Handle Exceptions catch { return new HttpResponseMessage(HttpStatusCode.InternalServerError); } } else return new HttpResponseMessage(HttpStatusCode.NotFound); } } }