How to overwrite an excel application without prompting the users

Can anyone help me on how can I overwrite the excel file without prompting the users in VB.Net..

I have try this code but It doesn't work..

Dim xlsApp As New Excel.Application
Dim xlsBook As Excel.Workbook
Dim xlsSheet As Excel.Worksheet
Dim dir As String = Application.StartupPath & "\Template\SampleTemplate.xls"
xlsBook = GetObject(dir)
xlsShe开发者_如何转开发et = xlsBook.Sheets("Per BPA Error Report")


xlsSheet.Range("C2:T2").Merge()

xlsApp.DisplayAlerts = False
xlsSheet.SaveAs(Application.StartupPath & "\Template\SampleTemplate.xls")
xlsBook = Nothing
xlsSheet = Nothing
xlsApp.Quit()

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Public Sub WriteExcelFile(ByVal ExcelFilePath As String) 
    Dim excel As Application = New Application
    Dim w As Workbook = excel.Workbooks.Open(ExcelFilePath)
    Dim sheet As Worksheet = w.Sheets(1)
    sheet.Cells(x + 1, 1) = 10
    x = x + 1
    excel.DisplayAlerts = False
    w.Save()
    w.Close()
End Sub

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If you just want to overwrite the file that's currently there, might just be easier to delete it first and then save the new file. So just use System.IO.File.Delete.

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Why do you need to use SaveAs?
Looking at the code, you are trying to write to the same file. Use Save instead.

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 Private Sub f_ExcelWorksheet()
    Dim oExcel As Object
    Dim oBook As Object
    Dim oSheet As Object

    'Start a new workbook in Excel
    oExcel = CreateObject("Excel.Application")

    'oBook = oExcel.Workbooks.Add 'This is when we want to create new excel sheet

    'If we want to open exisiting excel sheet
    oBook = oExcel.Workbooks.Open("C:\Users\adimadud\Desktop\Test.xlsx")

    'Add data to cells of the first worksheet in the new workbook
    oSheet = oBook.Worksheets(1)

    'This will find the lastRow in the sheet
    Dim lastRow As Integer = oSheet.UsedRange.Rows.Count

    'This is next emptyRow in the sheet
    Dim emptyRow As Integer = lastRow + 1
    'oSheet.Range("A1").Value = "Last Name"
    'oSheet.Range("B1").Value = "First Name"
    'oSheet.Range("A1:B1").Font.Bold = True
    'oSheet.Range("A2").Value = "Doe"
    'oSheet.Range("B2").Value = "John"



    MessageBox.Show(lastRow)
    oSheet.Cells(emptyRow, 1).value = "Test"
    oSheet.Cells(emptyRow, 2).value = "Test"
    'Now again find the lastRow in the excel sheet
    lastRow = oSheet.UsedRange.Rows.Count
    'This is next emptyRow in the sheet
    emptyRow = lastRow + 1

    'This will not prompt the user to overwrite the excel sheet
    oExcel.DisplayAlerts = False
    oBook.Save()
    oBook.Close()

    'Save the Workbook and Quit Excel
    'This will prompt the user to overwrite the excel sheet
    'oBook.saveas("C:\Users\adimadud\Desktop\Test.xlsx")

    oExcel.Quit()

End Sub