troubleshooting Question

Problem creating Excel file from VB.NET; Library not registered. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED)).

Avatar of kkp01
kkp01 asked on
.NET ProgrammingVisual Basic.NET
7 Comments2 Solutions3102 ViewsLast Modified:
I want to create excel worksheet from my VB.NET Project. I have searched & tried a code from web. I am developing in Visual studio 2008, using excel 2007, and added the nessasory referances to my project. The code does not show any error However, when executed, at the point of creating the workbook, runtime error occurs.

Error Message :
Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' to interface type 'Microsoft.Office.Interop.Excel._Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208D5-0000-0000-C000-000000000046}' failed due to the following error: Library not registered. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED)).

what does this error mean and what is cure for it ?
Imports Excel = Microsoft.Office.Interop.Excel

Public Class ExcelTest
    Inherits System.Windows.Forms.Form

    Friend WithEvents Button1 As Button

    Public Sub New()

        Button1 = New Button
        With Button1
            .Location = CalcLocation(2, 10)
            .Size = CalcSize(1.5, 10)
            .Text = "TEST"
        End With

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim xlApp As Excel.Application
        Dim xlWorkBook As Excel.Workbook
        Dim xlWorkSheet As Excel.Worksheet
        Dim misValue As Object = System.Reflection.Missing.Value

        xlApp = New Excel.ApplicationClass
        xlWorkBook = xlApp.Workbooks.Add(misValue)
        xlWorkSheet = CType(xlWorkBook.Sheets("sheet1"), Excel.Worksheet)
        xlWorkSheet.Cells(1, 1) = ""



        MsgBox("Excel file created , you can find the file c:\")
    End Sub

    Private Sub releaseObject(ByVal obj As Object)
            obj = Nothing
        Catch ex As Exception
            obj = Nothing
        End Try
    End Sub
End Class
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 2 Answers and 7 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 2 Answers and 7 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros