Rendering an RDLC report in HTML in ASP.NET MVC

问题

I would like to render an RDLC report in HTML within an ASP.NET MVC project.

I successfully made a prototype that renders an RDLC report in PDF, Excel, and TIFF image, with the help of this article. But I was surprised that HTML is not one of the default available formats in LocalReport.Render().

I came across this article, which describes a trick to enable the rendering format of HTML4.0, but I think that is only for a ReportViewer control (I could be wrong though).

The question is, in MVC how to render an RDLC report in HTML just like a ReportView does (see the screenshot below)?

回答1:

This is a simple task. You can follow the following steps.

Create a folder in your solution and give a name Reports.
Add a ASP.Net web form and named it ReportView.aspx

Create a Class ReportData and add it to the Reports folder. Add the following code to the Class.

public class ReportData
{
  public ReportData()
  {
      this.ReportParameters = new List<Parameter>();
      this.DataParameters = new List<Parameter>();
  }

  public bool IsLocal { get; set; }
  public string ReportName { get; set; }
  public List<Parameter> ReportParameters { get; set; }
  public List<Parameter> DataParameters { get; set; }
}

public class Parameter
{
  public string ParameterName { get; set; }
  public string Value { get; set; }
}

Add another Class and named it ReportBasePage.cs. Add the following code in this Class.

public class ReportBasePage : System.Web.UI.Page
{
    protected ReportData ReportDataObj { get; set; }

    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
        if (HttpContext.Current != null)
            if (HttpContext.Current.Session["ReportData"] != null)
            {
                ReportDataObj = HttpContext.Current.Session["ReportData"] as ReportData;
                return;
            }
        ReportDataObj = new ReportData();
        CaptureRouteData(Page.Request);
    }


    private void CaptureRouteData(HttpRequest request)
    {
        var mode = (request.QueryString["rptmode"] + "").Trim();
        ReportDataObj.IsLocal = mode == "local" ? true : false;
        ReportDataObj.ReportName = request.QueryString["reportname"] + "";
        string dquerystr = request.QueryString["parameters"] + "";
        if (!String.IsNullOrEmpty(dquerystr.Trim()))
        {
            var param1 = dquerystr.Split(',');
            foreach (string pm in param1)
            {
                var rp = new Parameter();
                var kd = pm.Split('=');
                if (kd[0].Substring(0, 2) == "rp")
                {
                    rp.ParameterName = kd[0].Replace("rp", "");
                    if (kd.Length > 1) rp.Value = kd[1];
                    ReportDataObj.ReportParameters.Add(rp);
                }
                else if (kd[0].Substring(0, 2) == "dp")
                {
                    rp.ParameterName = kd[0].Replace("dp", "");
                    if (kd.Length > 1) rp.Value = kd[1];
                    ReportDataObj.DataParameters.Add(rp);
                }
            }
        }
    }
}

Add ScriptManager to the ReportView.aspx page. Now Take a Report Viewer to the page. In report viewer set the property AsyncRendering="false". The code is given below.
```
<rsweb:ReportViewer ID="ReportViewerRSFReports" runat="server" AsyncRendering="false"
    Width="1271px" Height="1000px" >
</rsweb:ReportViewer>
```

Add two NameSpace in ReportView.aspx.cs

using Microsoft.Reporting.WebForms;
using System.IO;

Change the System.Web.UI.Page to ReportBasePage. Just replace your code using the following.

public partial class ReportView : ReportBasePage
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            RenderReportModels(this.ReportDataObj);
        }
    }

    private void RenderReportModels(ReportData reportData)
    {
        RASolarERPData dal = new RASolarERPData();
        List<ClosingInventoryValuation> objClosingInventory = new List<ClosingInventoryValuation>();

        // Reset report properties.
        ReportViewerRSFReports.Height = Unit.Parse("100%");
        ReportViewerRSFReports.Width = Unit.Parse("100%");
        ReportViewerRSFReports.CssClass = "table";

        // Clear out any previous datasources.
        this.ReportViewerRSFReports.LocalReport.DataSources.Clear();

        // Set report mode for local processing.
        ReportViewerRSFReports.ProcessingMode = ProcessingMode.Local;

        // Validate report source.
        var rptPath = Server.MapPath(@"./Report/" + reportData.ReportName +".rdlc");

        //@"E:\RSFERP_SourceCode\RASolarERP\RASolarERP\Reports\Report\" + reportData.ReportName + ".rdlc";
        //Server.MapPath(@"./Report/ClosingInventory.rdlc");

        if (!File.Exists(rptPath))
            return;

        // Set report path.
        this.ReportViewerRSFReports.LocalReport.ReportPath = rptPath;

        // Set report parameters.
        var rpPms = ReportViewerRSFReports.LocalReport.GetParameters();
        foreach (var rpm in rpPms)
        {
            var p = reportData.ReportParameters.SingleOrDefault(o => o.ParameterName.ToLower() == rpm.Name.ToLower());
            if (p != null)
            {
                ReportParameter rp = new ReportParameter(rpm.Name, p.Value);
                ReportViewerRSFReports.LocalReport.SetParameters(rp);
            }
        }

        //Set data paramater for report SP execution
        objClosingInventory = dal.ClosingInventoryReport(this.ReportDataObj.DataParameters[0].Value);

        // Load the dataSource.
        var dsmems = ReportViewerRSFReports.LocalReport.GetDataSourceNames();
        ReportViewerRSFReports.LocalReport.DataSources.Add(new ReportDataSource(dsmems[0], objClosingInventory));

        // Refresh the ReportViewer.
        ReportViewerRSFReports.LocalReport.Refresh();
    }
}

Add a Folder to the Reports Folder and named it Report. Now add a RDLC report to the Reports/Report folder and named it ClosingInventory.rdlc.

Now add a Controller and Named it ReportController. In to the controller add the following action method.

public ActionResult ReportViewer()
{                
    ViewData["reportUrl"] = "../Reports/View/local/ClosingInventory/";

    return View();
}

Add a view page click on the ReportViewer Controller. Named the view page ReportViewer.cshtml. Add the following code to the view page.

@using (Html.BeginForm("Login"))
 { 
       @Html.DropDownList("ddlYearMonthFormat", new SelectList(ViewBag.YearMonthFormat, "YearMonthValue", "YearMonthName"), new { @class = "DropDown" })

  Stock In Transit: @Html.TextBox("txtStockInTransit", "", new { @class = "LogInTextBox" })

  <input type="submit" onclick="return ReportValidationCheck();" name="ShowReport"
             value="Show Report" />

  }

Add an Iframe. Set the property of the Iframe as follows

frameborder="0"  width="1000"; height="1000"; style="overflow:hidden;" scrolling="no"

Add Following JavaScript to the viewer.

function ReportValidationCheck() {

var url = $('#hdUrl').val();
var yearmonth = $('#ddlYearMonthFormat').val();      
var stockInTransit = $('#txtStockInTransit').val()

if (stockInTransit == "") {
    stockInTransit = 0;
}

if (yearmonth == "0") {
    alert("Please Select Month Correctly.");
}
else {

    //url = url + "dpSpYearMonth=" + yearmonth + ",rpYearMonth=" + yearmonth + ",rpStockInTransit=" + stockInTransit;

    url = "../Reports/ReportView.aspx?rptmode=local&reportname=ClosingInventory&parameters=dpSpYearMonth=" + yearmonth + ",rpYearMonth=" + yearmonth + ",rpStockInTransit=" + stockInTransit;

    var myframe = document.getElementById("ifrmReportViewer");
    if (myframe !== null) {
        if (myframe.src) {
            myframe.src = url;
        }
        else if (myframe.contentWindow !== null && myframe.contentWindow.location !== null) {
            myframe.contentWindow.location = url;
        }
        else { myframe.setAttribute('src', url); }
    }
}

return false;
}

In Web.config file add the following key to the appSettings section add
```
key="UnobtrusiveJavaScriptEnabled" value="true"
```
In system.web handlers Section add the following key

add verb="*" path="Reserved.ReportViewerWebControl.axd" type = "Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
Change your data source as your own. This solution is very simple and I think every one enjoy it.

回答2:

You can use the ReportViewer object to render an RDLC to PDF or HTML. For my case (below) I wanted a PDF document and I returned it as a FileContentResult ActionResult. If you want it to return as a download use the File ActionResult (I've commented that out for your use).

    public ActionResult GetPackingSlipPDF(int shipmentId)
    {
        var shipment = _inboundShipmentService.GetInboundShipmentById(shipmentId);

        Warning[] warnings;
        string mimeType;
        string[] streamids;
        string encoding;
        string filenameExtension;

        var viewer = new ReportViewer();
        viewer.LocalReport.ReportPath = @"Labels\PackingSlip.rdlc";

        var shipLabel = new ShippingLabel { ShipmentId = shipment.FBAShipmentId, Barcode = GetBarcode(shipment.FBAShipmentId) };

        viewer.LocalReport.DataSources.Add(new ReportDataSource("ShippingLabel", new List<ShippingLabel> { shipLabel }));
        viewer.LocalReport.Refresh();

        var bytes = viewer.LocalReport.Render("PDF", null, out mimeType, out encoding, out filenameExtension, out streamids, out warnings);

        return new FileContentResult(bytes, mimeType);

        //return File(bytes, mimeType, shipment.FBAShipmentId + "_PackingSlip.pdf");
    }