Imports System.Web Namespace SAML Partial Public Class Login Inherits System.Web.UI.Page Protected Sub btnLogin_Click(sender As Object, e As EventArgs) Dim samlRequest As String = SamlHelper.CreateAuthRequest("https://cudreg.com", "https://localhost:7009/SAML/PostResponse.aspx") Dim redirectUrl As String = "https://sso.satitm.chula.ac.th/adfs/ls?SAMLRequest=" & HttpUtility.UrlEncode(samlRequest) Response.Redirect(redirectUrl) End Sub End Class End Namespace