How to pass parameters to SSRS report programmatically

You can do the following,: (it works both on local reports as in Full Blown SSRS reports. but in full mode, use the appropriate class, the parameter part remains the same)

LocalReport myReport = new LocalReport();myReport.ReportPath = Server.MapPath("~/Path/To/Report.rdlc");ReportParameter myParam = new ReportParameter("ParamName", "ParamValue");myReport.SetParameters(new ReportParameter[] { myParam });// more code here to render report

If the Report server is directly accessible, you can pass parameters in the Querystring if you are accessing the repoort with a URL:

http://MyServer/ReportServer/?MyReport&rs:Command=Render&Param1=54321&Param2=product

You can add output formatting by adding the following on the end of the URL:

&rs:Format=Excel

or

&rs:Format=PDF

It's been a while since I did this code, but it may help:Your web project has to be a Web Site, and not a project of type "ASP.Net Web Application", or you won't be able to add the reference mentioned below.Right click on the project and add an ASP.Net folder - App_WebReferences. You'll have to specify the server where your SRS is; choose the .asmx.Once it's added, the folder under that level is called RSService, and under that are 2 things: reportservice.discomap & .wsdl.In my VB, I do Imports RSService and Imports System.Web.Services.Protocols, then...

Dim MyRS As New ReportingService

The reporting service is on a different server than the webserver the app is on, so I can't do the following: MyRS.Credentials = System.Net.CredentialCache.DefaultCredentials

Instead: MyRS.Credentials = New System.Net.NetworkCredential(rs1, rs2, rs3),where the rs1/2/3 are the login to SRS box, password to SRS box, & domain name". (These are encrypted in my web.config.)

Then, a mass-paste:

MyRS.Credentials = New System.Net.NetworkCredential(rs1, rs2, rs3)Dim ReportByteArray As Byte() = NothingDim ReportPath As String = "/SRSSiteSubFolder/ReportNameWithoutRDLExtension"Dim ReportFormat As String = "PDF"Dim HistoryID As String = NothingDim DevInfo As String = "<DeviceInfo><Toolbar>False</Toolbar></DeviceInfo>"'Dim x As ReportParameter - not necessaryDim ReportParams(0) As ParameterValueReportParams(0) = New ParameterValue()ReportParams(0).Name = "TheParamName"ReportParams(0).Value = WhateverValueDim Credentials As DataSourceCredentials() = NothingDim ShowHideToggle As String = NothingDim Encoding As StringDim MimeType As StringDim ReportHistoryParameters As ParameterValue() = NothingDim Warnings As Warning() = NothingDim StreamIDs As String() = Nothing'Dim sh As New SessionHeader() - not necessary''MyRS.SessionHeaderValue = sh - not necessaryReportByteArray = MyRS.Render(ReportPath, ReportFormat, HistoryID, DevInfo, ReportParams, Credentials, _    ShowHideToggle, Encoding, MimeType, ReportHistoryParameters, Warnings, StreamIDs)'(Yay! That line was giving "HTTP error 401 - Unauthorized", until I set the credentials' as above, as explained by http://www.odetocode.com/Articles/216.aspx.)'Write the contents of the report to a PDF file:Dim fs As FileStream = File.Create(FullReportPath, ReportByteArray.Length)fs.Write(ReportByteArray, 0, ReportByteArray.Length)fs.Close()Call EmailTheReport(FullReportPath)If IO.File.Exists(FullReportPath) Then    IO.File.Delete(FullReportPath)End If