Sharepoont 2010 webpart vb.net Listbox SelectIndexChanged and errors - vb.net-2010

Question

So let start I am new to coding widgets and in general. I had originally coded this in vb for asp pages and it work fine. Now converting over to a SharePoint 2010 webpart (not visual webpart).
The project is List box 1 has the user groups that they manage, List box 2 has the users in said group, List box 3 has all user not in List box 2
I am sure there lots of this that should be fix. Like not putting in admin login to get the data.
But the problem I have is: if select a group it will display the appropriate data but select a second group or select a user to add; same error.
Error:
"Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request."
Also still trying to figure out how to do the button to add a user.
Need some serious help please. I know part of the post back just having a hard time finding resources.
Below is the code:
Imports System
Imports System.ComponentModel
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports Microsoft.SharePoint
Imports Microsoft.SharePoint.WebControls
Imports ActiveDs
Imports System.DirectoryServices
Imports System.Data
Imports ADODB
Imports System.Runtime.InteropServices
<ToolboxItemAttribute(False)> _
Public Class Groups
Inherits System.Web.UI.WebControls.WebParts.WebPart
Private LBgrp As ListBox
Private LBgrpmem As ListBox
Private LBaddgrp As ListBox
Private btnadd As Button
Protected Overrides Sub CreateChildControls()
Me.LBgrpmem = New ListBox
Me.LBgrpmem.AutoPostBack = True
Me.LBgrpmem.DataValueField = "sAMAccountName"
Me.LBgrpmem.DataTextField = "displayName"
Me.LBgrpmem.DataBind()
Me.LBgrpmem.Rows = 8
Me.LBgrpmem.Width = 170
Me.LBgrpmem.Height = 350
Me.LBgrpmem.Items.Insert(0, New ListItem("-- Current Members --"))
Me.Controls.Add(LBgrpmem)
Me.LBaddgrp = New ListBox
Me.LBaddgrp.AutoPostBack = True
Me.LBaddgrp.DataTextField = "displayName"
Me.LBaddgrp.DataValueField = "sAMAccountName"
Me.LBaddgrp.DataBind()
Me.LBaddgrp.Items.Insert(0, New ListItem("-- Add Users --"))
Me.LBaddgrp.Width = 170
Me.LBaddgrp.Height = 350
AddHandler LBaddgrp.SelectedIndexChanged, New EventHandler(AddressOf DLAdd_SelectedIndexChanged)
Me.Controls.Add(LBaddgrp)
Me.btnadd = New Button()
' AddHandler Me.btnadd.Click, New EventHandler(AddressOf Click_btnadd)
Me.btnadd.Text = "Add User"
Me.Controls.Add(btnadd)
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim oRootDSE = GetObject("LDAP://RootDSE")
Dim sDomainADsPath = "LDAP://" & oRootDSE.Get("defaultNamingContext")
Dim oCon As New ADODB.Connection
Dim oRecordSet As New ADODB.Recordset
Dim oCmd As New ADODB.Command
Dim sFullUser As String = Environment.UserName
Dim sProperties = "name,ADsPath,description,member,memberof,managedObjects"
Dim sGroup = "*"
Dim aMember
Dim iCount
oCon.ToString()
oCmd.ToString()
sFullUser.ToString()
sProperties.ToString()
sDomainADsPath.ToString()
oCon.Provider = "ADsDSOObject"
oCon.Open("ADProvider", "ADMINUSER#Domain.com", "ADMINPASSWORD")
oCmd.ActiveConnection = oCon
oCmd.CommandText = "<" & sDomainADsPath & ">;(&(objectCategory=person)(objectClass=user)(sAMAccountName=" & sFullUser & "));" & sProperties & ";subtree"
oRecordSet = oCmd.Execute
Dim de As DirectoryServices.DirectoryEntry = New DirectoryServices.DirectoryEntry(sDomainADsPath, "ADMINUSER#Domain.com", "ADMINPASSWORD", DirectoryServices.AuthenticationTypes.Secure)
Dim i As Integer = 0
Dim sl As SortedList = New SortedList(New CaseInsensitiveComparer)
de.ToString()
While Not oRecordSet.EOF
aMember = oRecordSet.Fields("managedObjects").Value
If Not IsDBNull(aMember) Then
For iCount = 0 To UBound(aMember)
Dim groupDN As String = ("distinguishedName=" & aMember(iCount))
Dim src As DirectoryServices.DirectorySearcher = New DirectoryServices.DirectorySearcher("(&(objectCategory=Group)(" & groupDN & "))")
src.SearchRoot = de
src.SearchScope = DirectoryServices.SearchScope.Subtree
For Each res As DirectoryServices.SearchResult In src.FindAll
sl.Add(res.Properties("name")(0).ToString, i)
i += 1
Next
Next
End If
oRecordSet.MoveNext()
End While
Me.LBgrp = New ListBox
Me.LBgrp.AutoPostBack = True
Me.LBgrp.DataSource = sl
Me.LBgrp.DataTextField = "key"
Me.LBgrp.DataValueField = "value"
Me.LBgrp.DataBind()
Me.LBgrp.Items.Insert(0, New ListItem("-- Groups --"))
Me.Controls.Add(LBgrp)
Me.LBgrp.SelectedIndex = 0
AddHandler LBgrp.SelectedIndexChanged, New EventHandler(AddressOf LBgrp_SelectedIndexChanged)
LBgrp.SelectedItem.ToString()
End Sub
Protected Sub LBgrp_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) 'Handles LBgrp.SelectedIndexChanged
Dim strQuery As String = "" & LBgrp.SelectedItem.Text.ToString() & "'"
'LBgrpmem.Items.Clear()
Dim oRootDSE2 = GetObject("LDAP://RootDSE")
Dim sDomainADsPath2 = "LDAP://" & oRootDSE2.Get("defaultNamingContext")
Dim oCon2 As New ADODB.Connection
Dim oRecordSet2 As New ADODB.Recordset
Dim sFullUser2 As String = Environment.UserName
Dim oCmd2 As New ADODB.Command
Dim sProperties2 = "name,ADsPath,description,member,memberof,managedObjects"
Dim grpADsPath2
Dim grpdsplynm2
oRootDSE2 = Nothing
oCon2.Provider = "ADsDSOObject"
oCon2.Open("ADProvider", "ADMINUSER#Domain.com", "ADMINPASSWORD")
oCmd2.ActiveConnection = oCon2
oCmd2.CommandText = "<" & sDomainADsPath2 & ">;(&(objectCategory=group)(objectClass=group)(CN=" & LBgrp.SelectedItem.Text & "));" & sProperties2 & ";subtree"
oRecordSet2 = oCmd2.Execute
While oRecordSet2.EOF
grpADsPath2 = oRecordSet2.Fields("ADsPath").Value
grpADsPath2.ToString()
grpdsplynm2 = grpADsPath2.remove(0, 7)
grpdsplynm2.ToString()
oRecordSet2.MoveNext()
End While
While Not oRecordSet2.EOF
grpADsPath2 = oRecordSet2.Fields("ADsPath").Value
grpADsPath2.ToString()
grpdsplynm2 = grpADsPath2.remove(0, 7)
grpdsplynm2.ToString()
oRecordSet2.MoveNext()
End While
Dim groupDN2 As String = "" & grpdsplynm2 & ""
Dim filter As String = [String].Format("(&(objectClass=user)(objectCategory=person)(memberOf={0}))", groupDN2)
Me.LBgrpmem.AutoPostBack = True
Me.LBgrpmem.DataSource = FindUsers(filter, New String() {"sAMAccountName", "displayName"}, sDomainADsPath2, True)
Me.LBgrpmem.DataValueField = "sAMAccountName"
Me.LBgrpmem.DataTextField = "displayName"
Me.LBgrpmem.DataBind()
Me.LBgrpmem.Items.Insert(0, New ListItem("-- Current Members --"))
Me.Controls.Add(LBgrpmem)
Dim usrDN As String = "" & grpdsplynm2 & ""
usrDN.ToString()
Dim usrfilter As String = [String].Format("(&(objectClass=user)(objectCategory=person)(!memberOf={0}))", groupDN2)
Me.LBaddgrp.AutoPostBack = True
Me.LBaddgrp.DataSource = FindUsers(usrfilter, New String() {"sAMAccountName", "displayName"}, sDomainADsPath2, True)
Me.LBaddgrp.DataTextField = "displayName"
Me.LBaddgrp.DataValueField = "sAMAccountName"
Me.LBaddgrp.DataBind()
Me.LBaddgrp.Items.Insert(0, New ListItem("-- Add Users --"))
'AddHandler LBaddgrp.SelectedIndexChanged, New EventHandler(AddressOf DLAdd_SelectedIndexChanged)
Me.Controls.Add(LBaddgrp)
End Sub
Public Function FindUsers(ByVal sFilter As String, ByVal columns() As String, ByVal path As String, ByVal useCached As Boolean) As Data.DataSet
Dim oRootDSE = GetObject("LDAP://RootDSE")
Dim sDomainADsPath = "LDAP://" & oRootDSE.Get("defaultNamingContext")
'try to retrieve from cache first
Dim context As HttpContext = HttpContext.Current
Dim userDS As Data.DataSet = CType(context.Cache(sFilter), Data.DataSet)
If userDS Is Nothing Or Not useCached Then
'setup the searching entries
Dim deParent As New DirectoryServices.DirectoryEntry(sDomainADsPath, "ADMINUSER#Domain.com", "ADMINPASSWORD", DirectoryServices.AuthenticationTypes.Secure)
Dim ds As New DirectoryServices.DirectorySearcher(deParent, sFilter, columns, DirectoryServices.SearchScope.Subtree)
ds.PageSize = 1000
ds.Sort.PropertyName = "displayName" 'sort option
Using (deParent)
userDS = New Data.DataSet("userDS")
Dim dt As Data.DataTable = userDS.Tables.Add("users")
Dim dr As Data.DataRow
'add each parameter as a column
Dim prop As String
For Each prop In columns
dt.Columns.Add(prop, GetType(String))
Next prop
Dim src As DirectoryServices.SearchResultCollection = ds.FindAll
Try
Dim sr As DirectoryServices.SearchResult
For Each sr In src
dr = dt.NewRow()
For Each prop In columns
If sr.Properties.Contains(prop) Then
dr(prop) = sr.Properties(prop)(0)
End If
Next prop
dt.Rows.Add(dr)
Next sr
Finally
src.Dispose()
End Try
End Using
'cache it for later, with sliding window
context.Cache.Insert(sFilter, userDS, Nothing, DateTime.MaxValue, TimeSpan.FromSeconds(10))
End If
Return userDS
End Function 'FindUsers
Protected Sub DLAdd_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) 'Handles Click_btnadd
Dim oRootDSE = GetObject("LDAP://RootDSE")
Dim sDomainADsPath = "LDAP://" & oRootDSE.Get("defaultNamingContext")
Dim oCon As New ADODB.Connection
Dim oRecordSet As New ADODB.Recordset
Dim oRcrdSet As New ADODB.Recordset
Dim oCmd As New ADODB.Command
Dim oCmd1 As New ADODB.Command
Dim sGroup = "*"
Dim sProperties = "name,ADsPath,description,member,memberof,proxyAddresses"
Dim grpADsPath
Dim grpdsplynm
Dim addusrADsPath
Dim addusrname
oRootDSE = Nothing
oCon.Provider = "ADsDSOObject"
oCon.Open("ADProvider", "ADMINUSER#Domain.com", "ADMINPASSWORD")
oCmd.ActiveConnection = oCon
oCmd1.ActiveConnection = oCon
oCmd.CommandText = "<" & sDomainADsPath & ">;(&(objectClass=group)(cn=" & LBgrp.SelectedItem.Text & "));" & sProperties & ";subtree"
oRecordSet = oCmd.Execute
'Group Query
While Not oRecordSet.EOF
grpADsPath = oRecordSet.Fields("ADsPath").Value
grpdsplynm = oRecordSet.Fields("name").Value
oRecordSet.MoveNext()
End While
oCmd1.CommandText = "<" & sDomainADsPath & ">;(&(objectCategory=person)(objectClass=user)(cn=" & LBaddgrp.SelectedItem.Text & "));" & sProperties & ";subtree"
oRcrdSet = oCmd1.Execute
'User query
While Not oRcrdSet.EOF
addusrADsPath = oRcrdSet.Fields("ADsPath").Value
addusrname = oRcrdSet.Fields("name").Value
oRcrdSet.MoveNext()
End While
' Bind directly to the group
'
Dim oRootDSE2 = GetObject("LDAP://RootDSE")
Dim sDomainADsPath2 = "LDAP://" & oRootDSE2.Get("defaultNamingContext")
Dim oCon2 As New ADODB.Connection
Dim oRecordSet2 As New ADODB.Recordset
Dim sFullUser2 As String = Environment.UserName
'Dim sFullUser2 = Request.ServerVariables("LOGON_USER")
'Dim sUser2 = Split(sFullUser2, "\", -1)
Dim oCmd2 As New ADODB.Command
Dim sProperties2 = "name,ADsPath,description,member,memberof,managedObjects"
Dim grpADsPath2
oRootDSE2 = Nothing
oCon2.Provider = "ADsDSOObject"
oCon2.Open("ADProvider", "ADMINUSER#Domain.com", "ADMINPASSWORD")
oCmd2.ActiveConnection = oCon2
oCmd2.CommandText = "<" & sDomainADsPath2 & ">;(&(objectCategory=group)(objectClass=group)(CN=" & LBgrp.SelectedItem.Text & "));" & sProperties2 & ";subtree"
oRecordSet2 = oCmd2.Execute
While Not oRecordSet2.EOF
grpADsPath2 = oRecordSet2.Fields("ADsPath").Value
oRecordSet2.MoveNext()
End While
Dim group As New DirectoryServices.DirectoryEntry("" & grpADsPath2 & "", "ADMINUSER#Domain.com", "ADMINPASSWORD", DirectoryServices.AuthenticationTypes.Secure)
Dim user As New DirectoryServices.DirectoryEntry(addusrADsPath, "ADMINUSER#Domain.com", "ADMINPASSWORD", DirectoryServices.AuthenticationTypes.Secure)
Dim isMember As Boolean = Convert.ToBoolean(group.Invoke("IsMember", New Object() {user.Path}))
If isMember Then
'
' TO CREATE ERROR MESSAGE
Else
' Add the user to the group by invoking the Add method
'
group.Invoke("Add", New Object() {user.Path})
End If
If Not IsNothing(user) Then
user.Dispose()
End If
If Not IsNothing(group) Then
group.Dispose()
End If
Console.ReadLine()
If (Err.Number <> 0) Then
' TO CREATE ERROR MESSAGE
Else
' TO CREATE SUCCESS MESSAGE
End If
End Sub
Protected Overrides Sub Render(writer As System.Web.UI.HtmlTextWriter)
LBgrp.RenderControl(writer)
LBgrpmem.RenderControl(writer)
LBaddgrp.RenderControl(writer)
btnadd.RenderControl(writer)
End Sub
End Class

Answer 1

if memory serves me correctly, Page_Load event is firing on a postback too, where you are trying to create another instance of your drop down. So the system is trying to recreate the state of ListBox from ViewState but it is not the same ListBox, because you have just recreated it. So it barks.
To avoid it, in the page_load only create "parent" drop down if it's not postback. i.e.
Begin Page_Load()
If !Page.IsPostBack() Then
'load code here
End If
End Page_Load
Also there's no need to write
Me.LBgrpmem = New ListBox
as it is already created. Changing the datasource is usually enuff.