Logon failed. (rsLogonFailed)

Question

Hi,
I am writing a web application in c# that is attempting to get the parameters from a report on a Reporting Services 2005 server.
I am using the following code:
SQLReportViewer.ServerReport.ReportServerCredentials = new
         ReportCredentials(UserName, UserPassword, UserDomain);
SQLReportViewer.ServerReport.ReportPath = Rpt.FileName;
SQLReportViewer.ServerReport.ReportServerUrl = new Uri(ServerUrl);
Parameters = SQLReportViewer.ServerReport.GetParameters();
The Getparameters Line causes the following exception:
Microsoft.Reporting.WebForms.ReportServerException was unhandled by user code
  Message="Logon failed. (rsLogonFailed)"
  Source="Microsoft.ReportViewer.WebForms"
  ErrorCode="rsLogonFailed"
  StackTrace:
       at Microsoft.Reporting.WebForms.ServerReport.get_Service()
       at Microsoft.Reporting.WebForms.ServerReport.GetExecutionInfo()
       at Microsoft.Reporting.WebForms.ServerReport.GetParameters()
The UserName, UserPassword and UserDomain variables are all populated with correct data, as is Rpt.FileName.
The ReportCredentials class is a very simple implementation of the ICredentials interface - Code shown here:
-->
public class ReportCredentials : IReportServerCredentials
  protected string _UserName, _Password, _Domain;
    public ReportCredentials(string UserName, string Password, string Domain)
    _UserName = UserName;
    _Password = Password;
    _Domain = Domain;
  public bool GetFormsCredentials (out System.Net.Cookie AuthCookie, out string UserName, out string Password, out string Authority)
    UserName = _UserName;
    Password = _Password;
    Authority = _Domain;
    AuthCookie = null;
    return (true);
    public System.Security.Principal.WindowsIdentity ImpersonationUser
      get { return (null); }
    public ICredentials NetworkCredentials
      get{ return (new NetworkCredential(_UserName, _Password, _Domain)); }
<--
I can use the same credentials to retrieve a list of reports from the report server (the report I am trying to access is in that list) and to log on directly by going to the URL of Reporting Services.
This is made more frustrating by the complete lack of detail in the error message, as it does not say why the logon failed, or give me a single clue about what is going on.
Has anyone seen this before and can tell me how to fix it, or is there something stupid in my code?
Thankyou.
Paul

Answer 1

You are right of course. Unline the WinForms version, the ASP.NET version of ReportViewer has NetworkCredentials read-only. Upon a second look, I don't see your code implementing IReportServerCredentials.GetBasicCredentials.
Code Snippet
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Reporting.WinForms;
using System.Security.Principal;
    public class ReportViewerCredentials : IReportServerCredentials
        public ReportViewerCredentials()
        public ReportViewerCredentials(string username)
            this.Username = username;
        public ReportViewerCredentials(string username, string password)
            this.Username = username;
            this.Password = password;
        public ReportViewerCredentials(string username, string password, string domain)
            this.Username = username;
            this.Password = password;
            this.Domain = domain;
        public string Username
            get
                return this.username;
            set
                string username = value;
                if (username.Contains("\\"))
                    this.domain = username.Substring(0, username.IndexOf("\\"));
                    this.username = username.Substring(username.IndexOf("\\") + 1);
                else
                    this.username = username;
        private string username;
        public string Password
            get
                return this.password;
            set
                this.password = value;
        private string password;
        public string Domain
            get
                return this.domain;
            set
                this.domain = value;
        private string domain;
        #region IReportServerCredentials Members
        public bool GetBasicCredentials(out string basicUser, out string basicPassword, out string basicDomain)
            basicUser = username;
            basicPassword = password;
            basicDomain = domain;
            return username != null && password != null && domain != null;
        public bool GetFormsCredentials(out string formsUser, out string formsPassword, out string formsAuthority)
            formsUser = username;
            formsPassword = password;
            formsAuthority = domain;
            return username != null && password != null && domain != null;
        public WindowsIdentity ImpersonationUser
            get
                return null;
        #endregion