Generate SSRS Report and save as PDF in SharePoint

Question

Hi,
I am working on a SharePoint 2010 Visual WebPart that lets a user click a button to generata a SSRS report and save the report in a SharePoint Library as a PDF file.  Code is mentioned below:
try
string siteContext = SPContext.Current.Web.Url;
string strReport = siteContext + "/Reports/Quote/Quote.rdl";
WR_SSRS.ReportExecutionService rs = new WR_SSRS.ReportExecutionService();
rs.Url = siteContext + "/_vti_bin/ReportServer/ReportExecution2005.asmx";
rs.Credentials = System.Net.CredentialCache.DefaultCredentials;
byte[] result;
string format = "PDF";
string historyID = null;
string devInfo = "<DeviceInfo><Toolbar>False</Toolbar></DeviceInfo>";
WR_SSRS.ParameterValue[] parameters = new WR_SSRS.ParameterValue[3];
parameters[0] = new WR_SSRS.ParameterValue();
parameters[0].Name = "EnqID";
parameters[0].Value = enqID.ToString();
parameters[1] = new WR_SSRS.ParameterValue();
parameters[1].Name = "QuotationID";
parameters[1].Value = quoteID;
WR_SSRS.DataSourceCredentials[] credentials = null;
string showHideToggle;
string encoding;
string mimeType;
WR_SSRS.Warning[] warnings;
WR_SSRS.ParameterValue[] reportHistoryParameters;
string[] streamIDs;
WR_SSRS.ExecutionInfo execInfo = new WR_SSRS.ExecutionInfo();
WR_SSRS.ExecutionHeader execHeader = new WR_SSRS.ExecutionHeader();
string SessionId = null;
string extension;
rs.ExecutionHeaderValue = execHeader;
execInfo = rs.LoadReport(strReport, historyID);
rs.SetExecutionParameters(parameters, "en-gb");
SessionId = rs.ExecutionHeaderValue.ExecutionID;
result = rs.Render(format, devInfo, out extension, out mimeType, out encoding, out warnings, out streamIDs);
execInfo = rs.GetExecutionInfo();
using (SPSite site = new SPSite(SPContext.Current.Site.ID))
using (SPWeb web = site.OpenWeb())
web.AllowUnsafeUpdates = true;
SPFolder folder = web.Folders[siteContext + "/Quotes"];
string filename = string.Concat(quoteID, ".pdf");
//remove old copies
SPList lib = web.Lists["Quotes"];
foreach (SPListItem i in lib.GetItems())
if (i.Name == filename)
i.Delete();
break;
SPFile file = folder.Files.Add(filename, result);
SPListItem item = file.Item;
item["EnquiryID"] = enqID.ToString();
item["FinalQuote"] = "No";
item.Update();
web.AllowUnsafeUpdates = false;
catch (Exception ex)
LogError(ex.Message);
The WebPart works fine in my local server and even on another development testing server.  However, once deployed to the live server that has claims authentication it stops working and throws an error that says:
"Client found response content type of 'text/html; charset=utf-8', but expected 'text/xml'. 
The request failed with the error message: 
<RSError xmlns="http://www.microsoft.com/sql/reportingservices"><MoreInformation><Message>An unknown error occurred with the Reporting Services endpoint on this SharePoint site. Contact the SharePoint site administrator for help.</Message></MoreInformation></RSError> 
If I open the report manually in SharePoint Site, it works fines it even works fine when try to view in a WebPart. 
Can someone help me with this ?
Regards, Vikram

Answer 1

Hi Vicky,
Based on the error message, it is related to the service account for reporting service.
If the Report Server service runs under a built-in account such as NetworkService, the Grant database access option in SharePoint Central Administration will not work correctly.
Configure the service account to run under a domain user account as follows:
1. Start the Reporting Services Configuration tool and connect to the report server.
2. On the Service Account page, click Use another account, enter a domain user account, and click Apply.
3. Click Web Service Identity, for Report Server, click New, type an application Restart the Report Server service.
Here is a detailed MSDN article for your reference:
http://msdn.microsoft.com/en-us/library/ms159704.aspx
Best Regards
Zhengyu Guo
TechNet Community Support