在MVC中将RDLC的二进制流数据通过RenderAction显示到页面上面

Question

public static class HotelReport { public static byte[] GenerateReport(string dtatSetName, IEnumerable dataSource, string reportFilePath,string reportType, out string mimeType, out string encoding, out string fileNameExtension) { //报表数据源 ReportDataSource reportDataSource = new ReportDataSource(dtatSetName, dataSource); //本地化报表 LocalReport localReport = new LocalReport(); localReport.ReportPath = reportFilePath; localReport.DataSources.Add(reportDataSource); string deviceInfo = "<DeviceInfo>" + " <OutputFormat>" + reportType + "</OutputFormat>" + " <PageWidth>8.5in</PageWidth>" + " <PageHeight>11in</PageHeight>" + " <MarginTop>0.5in</MarginTop>" + " <MarginLeft>1in</MarginLeft>" + " <MarginRight>1in</MarginRight>" + " <MarginBottom>0.5in</MarginBottom>" + "</DeviceInfo>"; Warning[] warnings; string[] streams; byte[] renderedBytes; renderedBytes = localReport.Render( reportType, deviceInfo, out mimeType, out encoding, out fileNameExtension, out streams, out warnings); return renderedBytes; } } 上面是用于将RDLC报表转换为二进制数据的方法。 下面的ReporesRelsult用于将这种数据写到输出当中 public class ReportsResult : ActionResult { public ReportsResult(byte[] data, string mineType) { this.Data = data; this.MineType = mineType; } public byte[] Data { get; set; } public string MineType { get; set; } public override void ExecuteResult(ControllerContext context) { if (Data == null) { new EmptyResult().ExecuteResult(context); return; } context.HttpContext.Response.ContentType = MineType; using (MemoryStream ms = new MemoryStream(Data)) { ms.Position = 0; using (StreamReader sr = new StreamReader(ms)) { context.HttpContext.Response.Output.Write(sr.ReadToEnd()); } } } } 下面是控制器的action方法： public ActionResult EmployeesNumberPerYear() { string dtatSetName = "DsENPerYear"; var dataSource = EmployeeReports.EmployeesNumberPerYear(employeeRepository); string reportFilePath = Server.MapPath("~/RDLC/Employee/EmployeesNumberPerYear.rdlc"); string reportType = "PDF"; string mimeType; string encoding; string fileNameExtension; byte[] renderedBytes = HotelReport.GenerateReport(dtatSetName, dataSource, reportFilePath, reportType, out mimeType, out encoding, out fileNameExtension); return new ReportsResult(renderedBytes, mimeType); } 以及html的调用： <div> @{ Html.RenderAction("EmployeesNumberPerYear", "EmployeeReports"); }</div> 其实问题就在于扩展的ActionResult，怎样将报表生成的RDLC转换过的二进制数据通过HttpContext来进行输出,并且RenderAction能够正确的显示出预览。 另外要说明的是，如果直接通过连接或url访问该action,excel的格式会直接用于保存，pdf的会显示出来。但我想让数据以预览的形式展示到div当中。

Answer 1

EmployeesNumberPerYear是通过Ajax调用的吗？