Formating excel spread sheet export from multiple datagridviews vb.net - vb.net

Question

I am currently working in microsoft visual studio 2013 with an sql back end. I am loading multiple DGVs' and then trying to export them to an excel spread sheet. However, I am not sure how to format this data. When I try and export multiple DGVs' they write over top of each other in the top left hand corner of the excel file. Does anyone know how to format and select where you want the DGVs' to load on the excel spreadsheet. I don't want them all to be on different sheets either. Here is my code:
Private Sub BtnExcelExport_Click(sender As Object, e As EventArgs) Handles BtnExcelExport.Click
Try
Dim xlapp As Microsoft.Office.Interop.Excel.Application
Dim xlworkbook As Microsoft.Office.Interop.Excel.Workbook
Dim xlworksheet As Microsoft.Office.Interop.Excel.Worksheet
Dim misvalue As Object = System.Reflection.Missing.Value
Dim I As Integer
Dim J As Integer
xlapp = New Microsoft.Office.Interop.Excel.Application
xlworkbook = xlapp.Workbooks.Add(misvalue)
xlworksheet = xlworkbook.Sheets("sheet1")
For I = 0 To DGVJobs.RowCount - 1
For J = 0 To DGVJobs.ColumnCount - 1
For K As Integer = 1 To DGVJobs.Columns.Count
xlworksheet.Cells(1, K) = DGVJobs.Columns(K - 1).HeaderText
xlworksheet.Cells(I + 2, J + 1) = DGVJobs(J, I).Value.ToString()
Next
Next
Next
'Here is my second DGV upload out of a few, this one will write over top of the other
For I = 0 To DGVAssociates.RowCount - 1
For J = 0 To DGVAssociates.ColumnCount - 1
For K As Integer = 1 To DGVAssociates.Columns.Count
xlworksheet.Cells(1, K) = DGVAssociates.Columns(K - 1).HeaderText
xlworksheet.Cells(I + 2, J + 1) = DGVAssociates(J, I).Value.ToString()
Next
Next
Next
xlworksheet.SaveAs("C:\example.xlsx")
xlworkbook.Close()
xlapp.Quit()
releaseobject(xlapp)
releaseobject(xlworkbook)
releaseobject(xlworksheet)
MsgBox("You can find the file C:\example.xlsx")
Dim res As MsgBoxResult
res = MsgBox("Saving completed, would you like to open the file?", MsgBoxStyle.YesNo)
If (res = MsgBoxResult.Yes) Then
Process.Start("C:\example.xlsx")
End If
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Sub
Private Sub releaseobject(ByVal obj As Object)
Try
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj)
obj = Nothing
Catch ex As Exception
obj = Nothing
Finally
GC.Collect()
End Try
End Sub
The second for loop is where I am having the over-write problem. If anyone has a link that can send me to a good website please post it as well.

Answer 1

Why are you looping twice throuhg the columns? The most inner loop is unnecesary.
Now, the variables you're using to specify the column to write to in excel go from 0 to ColumnCount in both groups of Fors. That's why they're overwriting each other.
Try this:
For I = 0 To DGVJobs.RowCount - 1
For J = 0 To DGVJobs.ColumnCount - 1
xlworksheet.Cells(1, J + 1) = DGVJobs.Columns(J).HeaderText
xlworksheet.Cells(I + 2, J + 1) = DGVJobs(J, I).Value.ToString()
Next
Next
For I = 0 To DGVAssociates.RowCount - 1
For J = 0 To DGVAssociates.ColumnCount - 1
xlworksheet.Cells(1, J + 1 + DGVJobs.ColumnCount) = DGVAssociates.Columns(K - 1).HeaderText
xlworksheet.Cells(I + 2, J + 1 + DGVJobs.ColumnCount) = DGVAssociates(J, I).Value.ToString()
Next
Next
(BTW and off-topic; a faster way to export data to excel is to first create an array with all the data and then asign it to the corresponding Range in the worksheet)

Answer 2

Try This Code, Then You Will Surely Text Me a Message of Thanks :)
Imports Excel = Microsoft.Office.Interop.Excel
Imports System.IO
Private Sub ExportToExcel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ExportToExcel.Click
Try
Dim xlapp As Microsoft.Office.Interop.Excel.Application
Dim xlworkbook As Microsoft.Office.Interop.Excel.Workbook
Dim xlworksheet, xlworksheet1 As Microsoft.Office.Interop.Excel.Worksheet
Dim misvalue As Object = System.Reflection.Missing.Value
Dim I As Integer
Dim J As Integer
xlapp = New Microsoft.Office.Interop.Excel.Application
xlworkbook = xlapp.Workbooks.Add(misvalue)
xlworksheet = xlworkbook.Sheets("Sheet1")
For I = 0 To DataGridView_Report.RowCount - 1
For J = 0 To DataGridView_Report.ColumnCount - 1
For K As Integer = 1 To DataGridView_Report.Columns.Count
xlworksheet.Cells(1, K) = DataGridView_Report.Columns(K - 1).HeaderText
xlworksheet.Cells(I + 2, J + 1) = DataGridView_Report(J, I).Value.ToString()
Next
Next
Next
xlworksheet1 = CType(xlworkbook.Worksheets.Add(), Excel.Worksheet)
For I = 0 To DataGridView_Calculation.RowCount - 1
For J = 0 To DataGridView_Calculation.ColumnCount - 1
For K As Integer = 1 To DataGridView_Calculation.Columns.Count
xlworksheet1.Cells(1, K) = DataGridView_Calculation.Columns(K - 1).HeaderText
xlworksheet1.Cells(I + 2, J + 1) = DataGridView_Calculation(J, I).Value.ToString()
Next
Next
Next
xlworksheet.Columns.AutoFit()
xlworksheet1.Columns.AutoFit()
Dim xlRange, xlRange1 As Excel.Range
xlRange = xlworksheet.Range("A1", "N1")
xlRange1 = xlworksheet1.Range("A1", "L1")
xlRange.Columns.Font.Bold = True
xlRange1.Columns.Font.Bold = True
xlworksheet.Name = "My Sheet1"
xlworksheet1.Name = "My Sheet2"
Dim saveFileDialog1 As New SaveFileDialog()
saveFileDialog1.Filter = "Excel Workbook|*.xls|Excel Workbook 2011|*.xlsx"
saveFileDialog1.Title = "Save Excel File"
saveFileDialog1.FileName = "Export " & Now.ToShortDateString & ".xlsx"
saveFileDialog1.ShowDialog()
saveFileDialog1.InitialDirectory = "C:/"
If saveFileDialog1.FileName <> "" Then
Dim fs As System.IO.FileStream = CType(saveFileDialog1.OpenFile(), System.IO.FileStream)
fs.Close()
End If
Dim strFileName As String = saveFileDialog1.FileName
Dim blnFileOpen As Boolean = False
Try
Dim fileTemp As System.IO.FileStream = System.IO.File.OpenWrite(strFileName)
fileTemp.Close()
Catch ex As Exception
blnFileOpen = False
Exit Sub
End Try
If System.IO.File.Exists(strFileName) Then
System.IO.File.Delete(strFileName)
End If
xlworkbook.SaveAs(strFileName)
xlapp.Workbooks.Open(strFileName)
xlapp.Visible = True
Exit Sub
errorhandler:
MsgBox(Err.Description)
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Sub
Private Sub releaseobject(ByVal obj As Object)
Try
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj)
obj = Nothing
Catch ex As Exception
obj = Nothing
Finally
GC.Collect()
End Try
End Sub