I'm getting a late binding warning on the below code, specifically the last line.
Dim xlApp As New Excel.Application
Dim xlWorkbook As Excel.Workbook = xlApp.Workbooks.Add()
Dim xlSheet As Excel.Worksheet = CType(xlWorkbook .Sheets(1), Excel.Worksheet)
xlSheet.Name = "Summary"
xlSheet.Columns(5).NumberFormat = "#"
I'm not getting the error on the .Name property line so presumably it's an issue with .Columns?
Why is this?
Try removing the New keyword in
Dim xlApp as New Excel.Application
Related
This code was working perfect for quite a while till now,
It throws exception :
System.InvalidCastException: Unable to cast COM object of type
'System.__ComObject' to class type
'Microsoft.Office.Interop.Excel.WorksheetClass'
Dim ds_allJobs As DataSet = DBHandling.searchJob("", "", "all open jobs")
Dim xlApp = New Microsoft.Office.Interop.Excel.Application
xlApp.Visible = False
xlApp.ScreenUpdating = False
Dim xlWorkbook = xlApp.Workbooks.Add(XlWBATemplate.xlWBATWorksheet)
Dim xlWorksheet = New Microsoft.Office.Interop.Excel.Worksheet
xlWorksheet = xlWorkbook.ActiveSheet 'IT FAILS HERE
xlWorksheet.Name = "Open Jobs"
Any suggestions?
It is better if you specify the types of objects (e.g. exWorkbook As Excel.Workbook)
Here is a way to make a new worksheet:
'create a new excel application (window)
Dim exApp As New Excel.Application
'add a workbook to it, and take a look at the first worksheet
Dim exWorkbook As Excel.Workbook = exApp.Application.Workbooks.Add()
'create a new worksheet
Dim exWorksheet As Excel.Worksheet
'add this worksheet to the current applicatoin
exWorksheet = CType(exApp.Worksheets.Add(), Excel.Worksheet)
Doe this answer your question? The last line is Casting the object to type worksheet.
I have a form with 1 button to create an Excel file on my desktop.
I get error message:
NullReferenceException Was Unhandled
Object reference not set to an instance of an object
and it highlights the code:
WB = excelapp.workbooks.add
I did add the reference "Microsoft excel 14.0" and my full code is below:
imports excel = microsoft.office.interop.excel
dim excelapp as excel.application
dim WB as excel.workbook
sub button1()
WB = excelapp.workbooks.add
excelapp.visible=true
end sub
Missing New on your Excel instance for starters:
Dim xlApp As New Excel.Application
Dim xlWorkbook As Excel.Workbook = xlApp.Workbooks.Add()
Dim xlWorksheet As Excel.Worksheet = CType(xlWorkbook.Sheets("sheet1"), Excel.Worksheet)
xlWorksheet.Cells(1, 1) = "data in first cell"
xlWorksheet.SaveAs(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) & "\" & "Test.xlsx")
xlWorkbook.Close()
xlApp.Quit()
xlApp = Nothing
xlWorkBook = Nothing
xlWorkSheet = Nothing
You should probably put this in Try/Catch/Finally block to catch errors in case you run into issues, but mostly because if the program doesn't continue properly finish that code block, an EXCEL.EXE will remain open in your task manager, as well as whatever Excel file it was accessing will be "in use by another program" when you try to access/modify/delete it.
just add one line, then it'll work
imports excel = microsoft.office.interop.excel
dim excelapp as excel.application
dim WB as excel.workbook
sub button1()
excelapp = new excel.application
WB = excelapp.workbooks.add
excelapp.visible=true
end sub
I wrote the following procedure to check for Microsoft Excel application, if opened. The procedure works fine, except that once it opens the workbook and the activates the sheet, a second instance of Excel tries to open.
Here is my code:
Dim xlApp As New Excel.Application
Dim xlBook As Excel.Workbook
Dim xlWBName As String = "2011.1004.Compensation Template"
For Each p As System.Diagnostics.Process In System.Diagnostics.Process.GetProcesses()
If p.ProcessName <> "EXCEL" Then
xlApp.Visible = True
xlBook = xlApp.Workbooks.Open("F:\Test Environment\Compensation Workbook\Compensation Workbook\bin\Debug\" & xlWBName & ".xlsx")
Dim xlSheet As Excel.Worksheet
xlSheet = CType(xlBook.Sheets("SummaryWorksheet"), Worksheet)
xlSheet.Activate()
End If
Next
Use the GetObject method to find an already open Application object:
http://msdn.microsoft.com/en-us/library/e9waz863(v=vs.90).aspx
Dim xlApp As Excel.Application
Try
'get an existing excel.application object
xlApp = GetObject(, "Excel.Application")
Catch ex As Exception
'no existing excel.application object - create a new one
xlApp = New Excel.Application
End Try
Dim xlBook As Excel.Workbook
Dim xlWBName As String = "2011.1004.Compensation Template"
xlApp.Visible = True
xlBook = xlApp.Workbooks.Open("F:\Test Environment\Compensation Workbook\Compensation Workbook\bin\Debug\" & xlWBName & ".xlsx")
Dim xlSheet As Excel.Worksheet
xlSheet = CType(xlBook.Sheets("SummaryWorksheet"), Worksheet)
xlSheet.Activate()
I am tyring to run code like this
xlWorkSheet.Cells(rownumber, 1) = "Some Value"
the problem is when I open the excel document the cell value is not updated.
any help will be appreciated
I use the following code to open the file
Dim pathtofile As String = Server.MapPath("~/UserControls/Upload/MyUpload.xlsx")
Dim xlApp As Excel.Application =New Excel.Application
Dim xlWorkBook As Excel.Workbook
Dim xlworkbooks As Excel.Workbooks
Dim xlWorksheets As Excel.Worksheets
Dim misValue As Object = System.Reflection.Missing.Value
Dim xlWorkSheet As Excel.Worksheet = Nothing
xlWorkBook = xlApp.Workbooks.Add(misValue)
xlworkbooks = xlApp.Workbooks
xlWorkBook = xlworkbooks.Open(pathtofile )
xlWorkSheet = xlWorkBook.Sheets("Sheet1")
You need to save, close, and release the com objects to make sure excel doesn't remain running as a process.
Sub save(filename As String) ' Saves the sheet under a specfic name
xlWorkBook.SaveAs(filename)
End Sub
Sub closexl()
xlWorkBooks.Close()
xlApp.Quit()
End Sub
Sub cleanup() ' Releases all of the com objects to object not have excel running as a process after this method finishes
GC.Collect()
GC.WaitForPendingFinalizers()
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkSheet)
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkBook)
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp)
xlApp = Nothing
End Sub
i have this code to read Excel file
Dim scheduleFileName As String
'Creating Excel Object
Dim fileName As String
fileName = "E:\Vb Deployment\scheduling\scheduleSheet.xlsx"
Dim objExcel As New Excel._ExcelApplication
Dim objWrkBk As Excel.Workbook
Dim objSht As Excel.Worksheet
Dim testdata As String
objWrkBk = GetObject(fileName)
' or objWrkBk = objExcel.Workbooks.Open("C:\test.xls")
objSht = objWrkBk.Worksheets(0)
testdata = objSht.Cells(1, 1).Value.ToString()
But it give at error on line
objSht = objWrkBk.Worksheets(0)
Error: member not found....
Could you please let me know why I am getting this error and how I could correct it?
Workbook does have a member Worksheets. The only thing that's missing is the typecast
objSht = CType(objWrkBk.Worksheets(0), Excel.Worksheet)