Access is denied to the network printers for ASP.NET App

I have instaled asp.net application on a server. I want to display network printers in a dropdown and i use this codes to achive that goal:

Protected Overrides Sub LoadPrinters()
Dim permison As New PrintingPermission(PrintingPermissionLevel.AllPrinting)
If Not IsPostBack Then
Dim strPrinter As String
Dim li As ListItem
dlPrinters.Items.Clear()
dlPrinters.Items.Add(New ListItem("Select Printer", ""))
For Each strPrinter In System.Drawing.Printing.PrinterSettings.InstalledPrinters
dlPrinters.Items.Add(strPrinter)
Next
End If

Also i try this code:

Private Sub PrinterList()
' USING WMI. (Windows Management Instrumentation)
Dim objMS As System.Management.ManagementScope = _
New System.Management.ManagementScope(ManagementPath.DefaultPath)
objMS.Connect()
Dim objQuery As SelectQuery = New SelectQuery("SELECT * FROM Win32_Printer")
Dim objMOS As ManagementObjectSearcher = New ManagementObjectSearcher(objMS, objQuery)
Dim objMOC As System.Management.ManagementObjectCollection = objMOS.Get()
dlPrinters.Items.Clear()
dlPrinters.Items.Add(New ListItem("Select Printer", ""))
For Each Printers As ManagementObject In objMOC
If CBool(Printers("Local")) Then ' LOCAL PRINTERS.
dlPrinters.Items.Add(Printers("Name"))
End If
If CBool(Printers("Network")) Then ' ALL NETWORK PRINTERS.
dlPrinters.Items.Add(Printers("Name"))
End If
Next Printers
End Sub

In both scenarios i cannot see network printers in the dropdown list and if i use second code i can see error: Access is denied.

My application is using impersonate account with full permision to the network and printers. What else can make the problems?

2 Replies

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Jordan Trajkov7y ago
Ok so i get the vb.net code to read network printers and when i run the code i see this error:
https://snipboard.io/gODL0f.jpg
Sai Kumar Koona7y ago
Hi,

Can you please verify the steps provided in the below link?

https://www.dotnetcurry.com/ShowArticle.aspx?ID=148