我正在编写一些软件以将CSV文件导入Active Directory（以创建用户帐户）。在某些时候，我知道它正在完美地导入多个帐户。我不知道自从我上次工作以来已经有一段时间我改变了什么。但它现在成功导入2个帐户，然后在第三次循环迭代期间在下面的行中崩溃（但仍然创建了第三个帐户）：
newUser.Save()
当它崩溃时我收到错误“vshost32.exe已停止工作”。然后，我启用了本机代码调试，现在出现此错误：“0xC0000374：堆已损坏”和InvalidCastException（请参阅发布结束时的立即窗口以获取完整错误）。为了测试我一直在删除并重新创建相同的帐户。如果我不删除前三个帐户，则处理主体存在异常，然后程序在第4次迭代时崩溃，然后是第5次，依此类推。但它从未在前两个崩溃。 （我导入的数据除了数字之外是相同的 - 例如，sAMAccountNames：Test1，Test2，Test3等）
Private Sub bwImport_DoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs) Handles bwImport.DoWork
Dim _worker As BackgroundWorker = CType(sender, BackgroundWorker)
Dim beginImport As New StartImport(AddressOf progressForm.StartImport)
Me.Invoke(beginImport, New Object() {dtUsers.Rows.Count})
Dim log As New UpdateLog(AddressOf progressForm.UpdateLog)
'### TO DO: Check that all mandatory columns/attributes are in the DataTable
'### TO DO: Check for duplicate sAMAccountNames, userPrincipalNames and Cononical Names
#If Not Debug Then
Try
#End If
Dim rowNum As Integer = 0 'Keep track of how many accounts have been created
For Each row As DataRow In dtUsers.Rows
Dim newUser As UserPrincipalEx = New UserPrincipalEx(adCtx)
newUser.SamAccountName = row("sAMAccountName")
newUser.SetPassword(row("Password"))
'General Tab (of Template Exporter)
If row.Table.Columns.Contains("initials") Then
newUser.Initials = row("initials")
End If
If row.Table.Columns.Contains("givenName") Then
newUser.GivenName = row("givenName")
End If
If row.Table.Columns.Contains("sn") Then
newUser.Surname = row("sn")
End If
If row.Table.Columns.Contains("displayName") Then
newUser.DisplayName = row("displayName")
End If
If row.Table.Columns.Contains("description") Then
newUser.Description = row("description")
End If
If row.Table.Columns.Contains("physicalDeliveryOfficeName") Then
newUser.Office = row("physicalDeliveryOfficeName")
End If
If row.Table.Columns.Contains("telephoneNumber") Then
newUser.TelephoneNumber = row("telephoneNumber")
End If
If row.Table.Columns.Contains("wWWHomePage") Then
newUser.WebPage = row("wWWHomePage")
End If
'Address Tab (of Template Exporter)
If row.Table.Columns.Contains("streetAddress") Then
newUser.Street = row("streetAddress")
End If
If row.Table.Columns.Contains("postOfficeBox") Then
newUser.POBox = row("postOfficeBox")
End If
If row.Table.Columns.Contains("l") Then 'City
newUser.City = row("l")
End If
If row.Table.Columns.Contains("st") Then 'State/Province
newUser.State = row("st")
End If
If row.Table.Columns.Contains("postalCode") Then
newUser.PostCode = row("postalCode")
End If
'### TO DO: Add country fields
'Account Tab (of Template Exporter)
If row.Table.Columns.Contains("userPrincipalName") Then
newUser.UserPrincipalName = row("userPrincipalName")
End If
If row.Table.Columns.Contains("ResetPassword") Then
If row("ResetPassword").ToString.ToLower = "yes" Then
newUser.ExpirePasswordNow() 'Force the user to change their password at next logon
End If
End If
If row.Table.Columns.Contains("PreventPasswordChange") Then
If row("PreventPasswordChange").ToString.ToLower = "yes" Then
newUser.UserCannotChangePassword = True
End If
End If
If row.Table.Columns.Contains("PasswordNeverExpires") Then
If row("PasswordNeverExpires").ToString.ToLower = "yes" Then
newUser.PasswordNeverExpires = True
End If
End If
If row.Table.Columns.Contains("AccountDisabled") Then
If row("AccountDisabled").ToString.ToLower = "yes" Then
newUser.Enabled = False
Else
newUser.Enabled = True
End If
Else 'Enable the account by default if not specified
newUser.Enabled = True
End If
If row.Table.Columns.Contains("accountExpires") Then
Dim expireyDate As Date
Date.TryParse(row("accountExpires"), expireyDate) 'Try to convert the data from row("accountExpires") into a date
newUser.AccountExpirationDate = expireyDate
End If
'Profile Tab (of Template Exporter)
If row.Table.Columns.Contains("profilePath") Then
newUser.ProfilePath = row("profilePath")
End If
If row.Table.Columns.Contains("scriptPath") Then
newUser.ScriptPath = row("scriptPath")
End If
If row.Table.Columns.Contains("homeDrive") Then
newUser.HomeDrive = row("homeDrive")
End If
If row.Table.Columns.Contains("homeDirectory") Then
newUser.HomeDirectory = row("homeDirectory")
End If
'Telephones Tab (of Template Exporter)
If row.Table.Columns.Contains("homePhone") Then
newUser.HomePhone = row("homePhone")
End If
If row.Table.Columns.Contains("pager") Then
newUser.Pager = row("pager")
End If
If row.Table.Columns.Contains("mobile") Then
newUser.Mobile = row("mobile")
End If
If row.Table.Columns.Contains("facsimileTelephoneNumber") Then
newUser.Fax = row("facsimileTelephoneNumber")
End If
If row.Table.Columns.Contains("ipPhone") Then
newUser.IPPhone = row("ipPhone")
End If
'Organization Tab
If row.Table.Columns.Contains("title") Then
newUser.Title = row("title")
End If
If row.Table.Columns.Contains("department") Then
newUser.Department = row("department")
End If
If row.Table.Columns.Contains("company") Then
newUser.Company = row("company")
End If
rowNum += 1
_worker.ReportProgress(rowNum) 'Update progress dialog
Try
newUser.Save() 'Save the user to Active Directory
Me.Invoke(log, New Object() {"Successfully created " + row("sAMAccountName") + " (" + row("displayName") + ")", frmProgress.LogType.Success})
Catch ex As PrincipalExistsException
Me.Invoke(log, New Object() {"Error creating " + row("sAMAccountName") + " (" + row("displayName") + "). " + ex.Message, frmProgress.LogType.Failure})
Continue For
End Try
'Member Of Tab
If row.Table.Columns.Contains("MemberOf") Then
Dim groups() As String = row("MemberOf").ToString.Split(";")
'Add the user to any specified groups
Dim groupPrincipal As GroupPrincipal
Try 'Try adding group(s)
For Each group As String In groups
groupPrincipal = groupPrincipal.FindByIdentity(adCtx, group) 'Search for the group name, sid, sAMAccountName or display name
If groupPrincipal IsNot Nothing Then
groupPrincipal.Members.Add(newUser) 'Add the user to the group
groupPrincipal.Save()
Else
Me.Invoke(log, New Object() {"Unable to add " + row("sAMAccountName") + " to group: " + group + ". Group not found.", frmProgress.LogType.Failure})
End If
Next
Catch ex As PrincipalExistsException
'### TO DO: Try to get group name in exception
Me.Invoke(log, New Object() {"Error adding " + row("sAMAccountName") + " (" + row("displayName") + ") to " + "group(s). " + ex.Message, frmProgress.LogType.Failure})
End Try
End If
newUser.Dispose() 'Dispose of the newUser object
Next
#If Not Debug Then
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.Critical)
End Try
#End If
End Sub
Critical error detected c0000374
First-chance exception at 0x76fbf996 in AD User Importer.exe: 0xC0000374: A heap has been corrupted.
A first chance exception of type 'System.InvalidCastException' occured in System.DirectoryServices.AccountManagement.dll
答案 0 :(得分：1)
我认为您的问题出在这个问题上：
Try
newUser.Save() 'Save the user to Active Directory
Me.Invoke(log, New Object() {"Successfully created " + row("sAMAccountName") + " (" + row("displayName") + ")", frmProgress.LogType.Success})
Catch ex As PrincipalExistsException
Me.Invoke(log, New Object() {"Error creating " + row("sAMAccountName") + " (" + row("displayName") + "). " + ex.Message, frmProgress.LogType.Failure})
Continue For
End Try
此代码可处理异常，但在继续下一个循环迭代之前不会处理newUser。
我最近开始收到类似的堆异常，经过仔细检查，我意识到我没有在处理UserPrincipal对象。一旦我正确处置了该物体，问题似乎就停止了。
您应该将newUser对象包装在Using block中：
For Each row As DataRow In dtUsers.Rows
Using newUser As UserPrincipalEx = New UserPrincipalEx(adCtx)
newUser.SamAccountName = row("sAMAccountName")
newUser.SetPassword(row("Password"))
' ... the remainder of the code
' ... now wrapped in a Using block
End Using
Next
无论如何退出Using块，newUser对象都会自动处理。由于Using块为您处理，因此您可以删除对newUser.Dispose()的显式调用。
如果在您的VB.Net版本中using块不可用，则应将循环包装在Try...Finally块中，并将newUser明确地放置在Final块中。