First post here, im currently developing a little application which needs to export the data from my datagridview to a csv file. So far I have:

Dim gridData(DataGridView1.Rows.Count - 1) As String

For Each r As DataGridViewRow In DataGridView1.Rows
If r.IsNewRow Then Exit For
Dim cellValues(DataGridView1.Rows(r.Index).Cells.Count - 1) As String
For Each c As DataGridViewCell In DataGridView1.Rows(r.Index).Cells
cellValues(c.ColumnIndex) = c.Value.ToString
gridData(r.Index) = String.Join(",", cellValues)
Dim lines = From line In gridData _
Where line <> Nothing _
Select line

IO.File.WriteAllLines("C:\temp\file.csv", lines.ToArray)

This so far writes to the file but has no column headings. Any ideas?

6 Years
Discussion Span
Last Post by developer_2010

Try the following code, it might be what you are looking for. This will import and export your data...

Imports System
Imports System.Data
Imports System.Data.OleDb
Imports System.IO

Code :

Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
       Dim intFileNameLength As Integer
       Dim strFileNamePath As String
       Dim strFileNameOnly As String

       If Not (UploadFile.PostedFile Is Nothing) Then
           strFileNamePath = UploadFile.PostedFile.FileName

           intFileNameLength = InStr(1, StrReverse(strFileNamePath), "\")

           strFileNameOnly = Mid(strFileNamePath, (Len(strFileNamePath) - intFileNameLength) + 2)
           Dim paths = Server.MapPath("/excelreading/")

           paths = paths & "Excel/"

           'If File.Exists(paths & strFileNameOnly) Then
           'lblMessage.Text = "Image of Similar name already Exist,Choose other name"
           If UploadFile.PostedFile.ContentLength > 40000 Then
               lblMessage.Text = "The Size of file is greater than 4 MB"
           ElseIf strFileNameOnly = "" Then
               Exit Sub
               strFileNameOnly = Session("AdminID") & "-" & Session("Acountry") & "-" & Format(Date.Today, "mm-dd-yyyy").Replace("/", "-") & ".xls"
               UploadFile.PostedFile.SaveAs(paths & strFileNameOnly)
               lblMessage.Text = "File Upload Success."
               Session("Img") = strFileNameOnly
           End If
       End If
       'End If

       Dim myDataset As New DataSet()
       Dim strConn As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
       "Data Source=" & Server.MapPath("/excelreading/") & "excel/" & strFileNameOnly & ";" & _
       "Extended Properties=Excel 8.0;"

       ''You must use the $ after the object you reference in the spreadsheet
       Dim myData As New OleDbDataAdapter("SELECT * FROM [Sheet1$]", strConn)
       myData.TableMappings.Add("Table", "ExcelTest")

       DataGrid1.DataSource = myDataset.Tables(0).DefaultView
   End Sub

   Private Sub btnExportToExcel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExportToExcel.Click
       ' Set the content type to Excel.
       Response.ContentType = "application/vnd.ms-excel"
       ' Remove the charset from the Content-Type header.
       Response.Charset = ""
       ' Turn off the view state.
       Me.EnableViewState = False

       Dim tw As New System.IO.StringWriter()
       Dim hw As New System.Web.UI.HtmlTextWriter(tw)

       ' Get the HTML for the control.
       ' Write the HTML back to the browser.
       ' End the response.
       lblMessage.Text = "For any more information , feel free to contact ...!!!"
   End Sub
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