Export to excel vb.net - vb.net

Question

I have a problem when I export a flexgrid to excel from vb.net vs2008 to office 2010 english version an excel file is opened but it is empty. However, when I use office french version it is opened [correctly]
My code is:
On Error GoTo ErrorHandler
Dim iRow As Short
Dim iCol As Short
Dim objExcl As Excel.Application
Dim objWk As Excel.Workbook
Dim objSht As Excel.Worksheet
Dim iHead As Short
Dim vHead As Object
objExcl = New Excel.Application
objExcl.Visible = True
objExcl.UserControl = True
Dim oldCI As System.Globalization.CultureInfo = _
System.Threading.Thread.CurrentThread.CurrentCulture
System.Threading.Thread.CurrentThread.CurrentCulture = _
New System.Globalization.CultureInfo("en-US")
objWk = objExcl.Workbooks.Add
System.Threading.Thread.CurrentThread.CurrentCulture = oldCI
objSht = objWk.Sheets(1)
vHead = Split(g.FormatString, "|")
'populate heading in the sheet
'take the column heading from flex grid and put it in the sheet
For iHead = 1 To UBound(vHead)
If Len(Trim(vHead(iHead))) > 0 Then objSht.Cells._Default(1, iHead) = vHead(iHead)
Next
System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.WaitCursor
For iRow = 0 To g.Rows - 1
For iCol = 0 To g.get_Cols() - 1
g.Row = iRow
g.Col = iCol
'
'If g.Text <> "" Then objSht.Cells._Default(iRow + 2, iCol + 1) = g.Text
If g.Text <> "" Then
objSht.Range(NumCol2Lattre(iCol + 1) & "" & iRow + 2 & ":" & NumCol2Lattre(iCol + 1) & "" & iRow + 2 & "").Select()
objExcl.ActiveCell.Value = g.Text
End If
Next iCol
Next iRow
objExcl.Application.Visible = True
System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default
objSht = Nothing
objWk = Nothingl may not be destroyed until it is garbage collected. Click
objExcl = Nothing
Exit Sub
ErrorHandler:
objSht = Nothing
objWk = Nothing
objExcl = Nothing
MsgBox("Error In expotation task & " & Err.Description, MsgBoxStyle.Information)
Err.Clear()

Answer 1

Check out this website Exporting MSFlexGrid to Excel
I suspect your problem is with vHead = Split(g.FormatString, "|") Use the debugger to find out what is the value of g.FormatString. Is it causing an error? Step through the code one line at a time and see what happens.

Answer 2

On Error GoTo ErrorHandler
Imports System.Data
Imports System.IO
Imports System.Web.UI
Partial Class ExportGridviewDatainVB
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
If Not IsPostBack Then
BindGridview()
End If
End Sub
Protected Sub BindGridview()
Dim dt As New DataTable()
dt.Columns.Add("UserId", GetType(Int32))
dt.Columns.Add("UserName", GetType(String))
dt.Columns.Add("Education", GetType(String))
dt.Columns.Add("Location", GetType(String))
dt.Rows.Add(1, "SureshDasari", "B.Tech", "Chennai")
dt.Rows.Add(2, "MadhavSai", "MBA", "Nagpur")
dt.Rows.Add(3, "MaheshDasari", "B.Tech", "Nuzividu")
dt.Rows.Add(4, "Rohini", "MSC", "Chennai")
dt.Rows.Add(5, "Mahendra", "CA", "Guntur")
dt.Rows.Add(6, "Honey", "B.Tech", "Nagpur")
gvDetails.DataSource = dt
gvDetails.DataBind()
End Sub
Public Overrides Sub VerifyRenderingInServerForm(ByVal control As Control)
' Verifies that the control is rendered
End Sub
Protected Sub btnExport_Click(ByVal sender As Object, ByVal e As EventArgs)
Response.ClearContent()
Response.Buffer = True
Response.AddHeader("content-disposition", String.Format("attachment; filename={0}", "Customers.xls"))
Response.ContentType = "application/ms-excel"
Dim sw As New StringWriter()
Dim htw As New HtmlTextWriter(sw)
gvDetails.AllowPaging = False
BindGridview()
'Change the Header Row back to white color
gvDetails.HeaderRow.Style.Add("background-color", "#FFFFFF")
'Applying stlye to gridview header cells
For i As Integer = 0 To gvDetails.HeaderRow.Cells.Count - 1
gvDetails.HeaderRow.Cells(i).Style.Add("background-color", "#df5015")
Next
gvDetails.RenderControl(htw)
Response.Write(sw.ToString())
Response.[End]()
End Sub
End Class