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

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。

海绵宝宝撒

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

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