Report viewer Error message “client found response content type of '' but expected 'text xml' The request failed with an empty response.”

问题

I'm getting the error

client found response content type of '' but expected 'text xml' The request failed with an empty response.

when I try to execute the following code.

//create a PDF from the SQL report
ReportViewer rview = new ReportViewer();

rview.ServerReport.ReportServerUrl = new Uri("http://server/ReportServer$MSSQL2K5?");

List<ReportParameter> paramList = new List<ReportParameter>();
paramList.Add(new Microsoft.Reporting.WinForms.ReportParameter("Batch", "1"));
paramList.Add(new Microsoft.Reporting.WinForms.ReportParameter("InvoiceNo", "0"));
rview.ServerReport.ReportPath = "Report/Report Invoice";

rview.ServerReport.SetParameters(paramList);

string mimeType, encoding, extension, deviceInfo;
string[] streamids;
Microsoft.Reporting.WinForms.Warning[] warnings;
string format = "PDF"; //Desired format goes here (PDF, Excel, or Image)             

deviceInfo =
"<DeviceInfo>" +
"<SimplePageHeaders>True</SimplePageHeaders>" +
"</DeviceInfo>";

byte[] bytes = rview.LocalReport.Render(format, deviceInfo, out mimeType, out encoding, out extension, out streamids, out warnings);

The error occurs on the line:

rview.ServerReport.SetParameters(paramList);

The address is correct as I can load the report fine via a web browser:

this.webBrowser1.Navigate("http://server/ReportServer$MSSQL2K5?/Report/Report Invoice&Batch=1&InvoiceNo=0");

I need to load the report with the report viewer so I can export as PDF.

回答1:

Try setting the Uri to the full service uri, eg:

new Uri("http://server/ReportServer$MSSQL2K5/reportservice2005.asmx?")

Additionally, do you need the trailing ?? I'm not sure, but wouldn't it be appended if needed by SetParameters?

回答2:

In my case this error was caused by the SSRS server running out of hard drive space.

回答3:

On my side, the service (SSRS) was hanging on the server side, had to force stop service and restart it.

来源：https://stackoverflow.com/questions/3865825/report-viewer-error-message-client-found-response-content-type-of-but-expect

标签

reporting-services