Question : Export Gridview to csv file - btnExportCSV_Click

I am having problem with this line I am trying to pput the file on the desk top

Line 144:        'make sure this is a path that you have permissions to save in
Line 145:
Line 146:        objStreamWriter = New IO.StreamWriter("..\mycsvfile.csv")
Line 147:        'Write text.
Line 148:
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Protected Sub btnExportCSV_Click(ByVal sender As Object, ByVal e As EventArgs)

        Dim objStreamWriter As IO.StreamWriter

        'Pass the file path and the file name to the StreamWriter constructor.
        'make sure this is a path that you have permissions to save in

        objStreamWriter = New IO.StreamWriter("~\mycsvfile.csv")
        'Write text.

        Dim Str As String
        Dim i As Integer
        Dim j As Integer

        Dim headertext = "field1,field2,field3,field4,field5,field5,field6"
        objStreamWriter.WriteLine(headertext)
        For i = 0 To (Me.uxItemDetailGrid.Rows.Count - 1)
            For j = 0 To (Me.uxItemDetailGrid.Columns.Count - 1)

                'this IF statement stops it from adding a comma after the last field
                If j = (Me.uxItemDetailGrid.Columns.Count - 1) Then
                    Str = (Me.uxItemDetailGrid.Rows(i).Cells(j).Text.ToString)
                Else
                    Str = (Me.uxItemDetailGrid.Rows(i).Cells(j).Text.ToString & ",")
                End If
                objStreamWriter.Write(Str)
            Next
            objStreamWriter.WriteLine()
        Next
        'Close the file.
        objStreamWriter.Close()


    End Sub

Answer : Export Gridview to csv file - btnExportCSV_Click

try the follwing code

 Public Shared Sub ExportToCSVl(ByVal fileName As String, ByVal query As String)
        Dim cmd As MySqlCommand
        cmd = New MySqlCommand(query)
        Dim dt As DataTable = GetData(cmd)
        'Create a dummy GridView
        Dim GridView2 As New GridView()
        GridView2.AllowPaging = False
        GridView2.DataSource = dt
        GridView2.DataBind()
        Current.Response.Clear()
        Current.Response.Buffer = True
        Current.Response.AddHeader("content-disposition", String.Format("attachment;filename={0}.csv", fileName))
        Current.Response.Charset = "HEllo"
        Current.Response.ContentType = "application/vnd.ms-excel"
        Dim sw As New StringWriter()
        Dim hw As New HtmlTextWriter(sw)
        For i As Integer = 0 To GridView2.Rows.Count - 1
            'Apply text style to each Row
            GridView2.Rows(i).Attributes.Add("class", "textmode")
        Next
        GridView2.RenderControl(hw)
        'style to format num bers to string
        ' Dim style As String = ""
        ' Current.Response.Write(style)
        Current.Response.Output.Write(sw.ToString())
        Current.Response.Flush()
        Current.Response.End()
    End Sub


u just have to pass the filename and the query thats all