Adding Form Validation to ADFS Login
I need to add a check for form variables that are passed to my adfs login page but when I add anything to the built-in Page_Load function it breaks.

**FormsSignIn.aspx**<br>

    <%@ Page Language="C#" MasterPageFile="~/MasterPages/MasterPage.master" AutoEventWireup="true"  ValidateRequest="false"
        CodeFile="FormsSignIn.aspx.cs" Inherits="FormsSignIn" Title="<%$ Resources:CommonResources, FormsSignInPageTitle%>"
        EnableViewState="false" runat="server"%>
    <%@ OutputCache Location="None" %>
    
    <asp:Content ID="FormsSignInContent" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
        <div class="GroupXLargeMargin"><asp:Label Text="<%$ Resources:CommonResources, FormsSignInHeader%>" runat="server" /></div>
        <h3>*******I Want lbl1.Text to output here from the codefile.</h3>
    	<table class="UsernamePasswordTable">
            <tr>
                <td>
                    <span class="Label"><asp:Label Text="<%$ Resources:CommonResources, UsernameLabel%>" runat="server" /></span>
                </td>
                <td>
                    <asp:TextBox runat="server" ID="UsernameTextBox" ></asp:TextBox>            
                </td>
                <td class="TextColorSecondary TextSizeSmall">
                    <asp:Label Text="<%$ Resources:CommonResources, UsernameExample%>" runat="server" />
                </td>
            </tr>
            <tr>
                <td>
                    <span class="Label"><asp:Label Text="<%$ Resources:CommonResources, PasswordLabel%>" runat="server" /></span>
                </td>
                <td>
                    <asp:TextBox runat="server" ID="PasswordTextBox" TextMode="Password" ></asp:TextBox>            
                </td>
                <td>&nbsp;</td>
            </tr>
            <tr>
                <td></td>
                <td colspan="2" class="TextSizeSmall TextColorError">
                    <asp:Label ID="ErrorTextLabel" runat="server" Text="" Visible="False"></asp:Label>
                </td>
            </tr>
            <tr>
                <td colspan="2">
                    <div class="RightAlign GroupXLargeMargin">
                        <asp:Button ID="SubmitButton" runat="server" Text="<%$ Resources:CommonResources, FormsSignInButtonText%>" OnClick="SubmitButton_Click" CssClass="Resizable"/>
                    </div>
                </td>
                <td>&nbsp;</td>
            </tr>
        </table>
    </asp:Content>

**FormsSignIn.Aspx.cs**<br>    

    using System;
    using Microsoft.IdentityServer.Web;
    using Microsoft.IdentityServer.Web.UI;

    public partial class FormsSignIn : FormsLoginPage
    {
        protected void Page_Load( object sender, EventArgs e )
        {
                //Uncommented, this breaks!!!!!!!!!!!!!!
    		/* if ( !string.IsNullOrEmpty(Page.Request.Form["foo"]) ) {
    	            lbl1.Text = Page.Request.Form["foo"].Trim();
        	} else {
    	    	    lbl1.Text = "not found";
            	} */
        }
    
        protected void HandleError( string message )
        {
            ErrorTextLabel.Visible = true;
            ErrorTextLabel.Text = Resources.CommonResources.IncorrectUsernameText;
        }
    
        protected void SubmitButton_Click( object sender, EventArgs e )
        {
            try
            {
                SignIn( UsernameTextBox.Text, PasswordTextBox.Text );
            }
            catch ( AuthenticationFailedException ex )
            {
                HandleError( ex.Message );
            }
        }
    }
Adding Form Validation to ADFS Login
===

I need to add a check for form variables that are passed to my adfs login page but when I add anything to the built-in Page_Load function it breaks.

**FormsSignIn.aspx**<br>

    <%@ Page Language="C#" MasterPageFile="~/MasterPages/MasterPage.master" AutoEventWireup="true"  ValidateRequest="false"
        CodeFile="FormsSignIn.aspx.cs" Inherits="FormsSignIn" Title="<%$ Resources:CommonResources, FormsSignInPageTitle%>"
        EnableViewState="false" runat="server"%>
    <%@ OutputCache Location="None" %>
    
    <asp:Content ID="FormsSignInContent" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
        <div class="GroupXLargeMargin"><asp:Label Text="<%$ Resources:CommonResources, FormsSignInHeader%>" runat="server" /></div>
        <h3>*******I Want lbl1.Text to output here from the codefile.</h3>
    	<table class="UsernamePasswordTable">
            <tr>
                <td>
                    <span class="Label"><asp:Label Text="<%$ Resources:CommonResources, UsernameLabel%>" runat="server" /></span>
                </td>
                <td>
                    <asp:TextBox runat="server" ID="UsernameTextBox" ></asp:TextBox>            
                </td>
                <td class="TextColorSecondary TextSizeSmall">
                    <asp:Label Text="<%$ Resources:CommonResources, UsernameExample%>" runat="server" />
                </td>
            </tr>
            <tr>
                <td>
                    <span class="Label"><asp:Label Text="<%$ Resources:CommonResources, PasswordLabel%>" runat="server" /></span>
                </td>
                <td>
                    <asp:TextBox runat="server" ID="PasswordTextBox" TextMode="Password" ></asp:TextBox>            
                </td>
                <td>&nbsp;</td>
            </tr>
            <tr>
                <td></td>
                <td colspan="2" class="TextSizeSmall TextColorError">
                    <asp:Label ID="ErrorTextLabel" runat="server" Text="" Visible="False"></asp:Label>
                </td>
            </tr>
            <tr>
                <td colspan="2">
                    <div class="RightAlign GroupXLargeMargin">
                        <asp:Button ID="SubmitButton" runat="server" Text="<%$ Resources:CommonResources, FormsSignInButtonText%>" OnClick="SubmitButton_Click" CssClass="Resizable"/>
                    </div>
                </td>
                <td>&nbsp;</td>
            </tr>
        </table>
    </asp:Content>

**FormsSignIn.Aspx.cs**<br>    

    using System;
    using Microsoft.IdentityServer.Web;
    using Microsoft.IdentityServer.Web.UI;

    public partial class FormsSignIn : FormsLoginPage
    {
        protected void Page_Load( object sender, EventArgs e )
        {
                //Uncommented, this breaks!!!!!!!!!!!!!!
    		/* if ( !string.IsNullOrEmpty(Page.Request.Form["foo"]) ) {
    	            lbl1.Text = Page.Request.Form["foo"].Trim();
        	} else {
    	    	    lbl1.Text = "not found";
            	} */
        }
    
        protected void HandleError( string message )
        {
            ErrorTextLabel.Visible = true;
            ErrorTextLabel.Text = Resources.CommonResources.IncorrectUsernameText;
        }
    
        protected void SubmitButton_Click( object sender, EventArgs e )
        {
            try
            {
                SignIn( UsernameTextBox.Text, PasswordTextBox.Text );
            }
            catch ( AuthenticationFailedException ex )
            {
                HandleError( ex.Message );
            }
        }
    }