winforms implementing IReportServerCredentials - Error: Property 'ReportServerCredentials' is 'ReadOnly'

Question

 Hi,

    I got an error in my win form when I tried to load my reports thru reportserver: below of my code in my frmreportviewer when it loads up it throw an exception that "Property 'ReportServerCredentials' is 'ReadOnly'"

Public Class frmReportViewer

Private Sub frmReportViewer_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    ReportViewer1.ProcessingMode = Microsoft.Reporting.WinForms.ProcessingMode.Remote
    ReportViewer1.ServerReport.ReportServerUrl = New Uri(_ReportServerURL)
    ReportViewer1.ServerReport.ReportPath = "/HRIS_EmployeeInformation/EmployeeList"
    ReportViewer1.ServerReport.ReportServerCredentials() = New ReportServerCredentials("administrator", "admin", "WORKGROUP")
    Me.ReportViewer1.RefreshReport()
End Sub

End Class

This is the class for IReportServerCredentials:

Imports System.Security.Principal
Imports System.Data
Imports Microsoft.Reporting.WinForms
Imports System.Net

Public Class ReportServerCredentials
    Implements IReportServerCredentials

Private _userName As String
Private _password As String
Private _domain As String

Public Sub New(ByVal userName As String, ByVal password As String, ByVal domain As String)
    _userName = userName
    _password = password
    _domain = domain
End Sub

Public Function GetFormsCredentials(ByRef authCookie As System.Net.Cookie, ByRef userName As String, ByRef password As String, ByRef authority As String) As Boolean Implements Microsoft.Reporting.WinForms.IReportServerCredentials.GetFormsCredentials
    authCookie = Nothing
    userName = password = authority = Nothing
    Return False
End Function

 Public ReadOnly Property ImpersonationUser() As System.Security.Principal.WindowsIdentity Implements Microsoft.Reporting.WinForms.IReportServerCredentials.ImpersonationUser

Get
    Return Nothing
End Get 

End Property

Public ReadOnly Property NetworkCredentials() As System.Net.ICredentials Implements Microsoft.Reporting.WinForms.IReportServerCredentials.NetworkCredentials

Get
    Return New NetworkCredential(_userName, _password, _domain)
End Get 

End Property

End Class

    any one pls help. thank you.

best regards,
 

---

Jeff®

Answer 1

Unlike the webforms version of the ReportViewer control which requires you to provide an implementation of the IReportServerCredentials interface, the winforms version of the report viewer implements ReportServerCredentials directly.  In your case, you can just assign your NetworkCredential object to ReportViewer.ServerReport.ReportServerCredentials.NetworkCredentials.

Answer 2

Thanks Brian

That took some digging to find out.  Like Brian said ..Winforms behaves differently to Webforms. You cannot assign custom credentials to ReportViewer1.ServerReport.ReportServerCredentials if you use winforms... (is read only...I know weird)....need to assign a network credential object to reportViewer1.ServerReport.ReportServerCredentials.NetworkCredentials.

Thus to save yourselves...here is some code ..

          {

           reportViewer1.ProcessingMode = ProcessingMode.Remote;

            NetworkCredential myCred = new NetworkCredential("MyUserID", "MyPassword", "Domain");
            reportViewer1.ServerReport.ReportServerCredentials.NetworkCredentials = myCred;

            reportViewer1.ServerReport.ReportServerUrl = new Uri("http://xx.xxx.xxx.xx/ReportServer/");
            reportViewer1.ServerReport.ReportPath = "/MY_REPORT_DIR/MyReport";
            reportViewer1.RefreshReport();
 

          }