Restore to SharePoint 2013 – Custom FBA Login Page Error – Could not load file or assembly Microsoft.SharePoint.IdentityModel

Posted in: Blog, SharePoint 2013, SharePoint 2013 Errors | Mar 11, 2013 at 9:53 AM

INTRODUCTION

I have just installed SharePoint 2013 and I’m now in the process of migrating sites.

One of the sites has FBA Authentication setup with custom login page. In the custom login page I use SPClaimsUtility.AuthenticateFormsUser to authenticate the user.

The site was restored OK in SP 2013 except when I tried to login using the custom login page I get the following error:

Exception information:

Exception type: FileNotFoundException

Exception message: Could not load file or assembly ‘Microsoft.SharePoint.IdentityModel, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c’ or one of its dependencies. The system cannot find the file specified.

at RDC.Branding.Layouts.RDC.Branding.LoginPage.Login_Click(Object sender, EventArgs e)

at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

RESOLUTION

The resolution to this issue was missing a dependent assembly. So open your SP site’s web.config and add the following lines within <assemblyBinding> tag:

      <dependentAssembly>
        <assemblyIdentity name=”Microsoft.SharePoint.IdentityModel” publicKeyToken=”71e9bce111e9429c” culture=”neutral” />
        <bindingRedirect oldVersion=”14.0.0.0″ newVersion=”15.0.0.0″ />
      </dependentAssembly>

Hope this helps,

Tommy

Written by Tommy Segoro

A web solution expert who has passion in website technologies. Tommy has been in the web industry for more than 10 years. He started his career as a PHP developer and has now specialized in ASP.NET, SharePoint and MS CRM. During his career he has also been in many roles: system tester, business analyst, deployment and QA manager, team and practice leader and IT manager.

View all posts by: Tommy Segoro

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