显示'#Error'的地方RDLC报告应显示报告参数

Question

我正在使用RDLC（VS2010）在网页（MVC3）上呈现简单的发货标签以PDF。我有一个参数需要传递给RDLC（ShipmentId）。我传递了该参数，并且报告正确呈现，除了应显示参数传入的文本框。

RDLC上的文本框将其值设置为'= Parameters！ShipmentId.Value'。

这里是我的代码如下所示：

shipment.ShipmentId = "123TEST"; 

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

    LocalReport report = new LocalReport(); 
    report.ReportPath = @"Labels\ShippingLabel.rdlc"; 
    report.Refresh(); 

    report.EnableExternalImages = true; 

    ReportParameter param = new ReportParameter("ShipmentId", shipment.ShipmentId, true); 
    report.SetParameters(param); 

    report.Refresh(); 

    byte[] bytes = report.Render("PDF", null, out mimeType, out encoding, out filenameExtension, out streamids, out warnings); 

    return new FileContentResult(bytes, mimeType); 

Answer 1

的问题竟然是，使用ProcessingMode.Local时的ReportViewer不能有ReportParameters。相反，我将我的代码更改为使用数据源而不是参数。

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

     var viewer = new ReportViewer(); 
     viewer.ProcessingMode = ProcessingMode.Local; 

     viewer.LocalReport.ReportPath = @"Labels\ShippingLabel.rdlc"; 
     viewer.LocalReport.EnableExternalImages = true; 

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

     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);