Creating Custom .net Application in SharePoint 2013

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VB

SharePoint2013

Dear All,

We are using an application that receive windows user name from SAP through XML web services and it display records based on user name. Currently we are facing a issue with Upper Case and Lower Case SP 2013 only accept lower case as the code below (user.name).

Dim netBIOSname As String = Me.Request.LogonUserIdentity.NameDim sAMAccountName As String = netBIOSname.Substring(netBIOSname.LastIndexOf("\"c) + 1)txtmanager.Text = sAMAccountName

In SAP all user name is in different case. We would like SP 2013 to receive any case either Upper case or Lower Case

It was working fine in SP 2010.

Thanks to all