Csv exporting with double quotes and commas

Hi!

I have a program which with I can upload a csv to datagridview and modify it.

I want to export the datagridview info as a csv file and I would want it to look the same as it was imported.

The imported csv file looks like this:

"Nro","Tyyppi","Yks","Ktp","Kustpk","Alue","Laatu","Koodi","Selite","Lisatietoja"

"110","VARASTO","24.30","A12","","","2/ ","","",""

"111","OPETUSKE","55.80","A54","","","3/ ","","",""

"112","LUOKKA","57.40","A54","","","3/ ","","",""

"113","LUOKKA","55.80","A54","","","3/ ","","",""

"114","OPETUSKE","56.70","A54","","","3/ ","","",""

"115","PIENRY","31.80","A52","","","3/ ","","",""

"116","LUOKKA","56.70","A54","","","3/ ","","",""

The first row is headerlabels and the rest is the info that is going to be modified.

The exported csv file looks like this:

"Nro","Tyyppi","Yks","Ktp","Kustpk","Alue","Laatu","Koodi","Selite","Lisatietoja","

110,VARASTO,24.30,A12,,,2/ ,,,,

111,OPETUSKE,55.80,A54,,,3/ ,,,,

112,LUOKKA,57.40,A54,,,3/ ,,,,

113,LUOKKA,55.80,A54,,,3/ ,,,,

114,OPETUSKE,56.70,A54,,,3/ ,,,,

115,PIENRY,31.80,A52,,,3/ ,,,,

116,LUOKKA,56.70,A54,,,3/ ,,,,

And my code for the export looks like this:

private void btnExport_Click(object sender, EventArgs e)
{
// Don't save if no data is returned
if (dataGridView1.Rows.Count == 0)
{
return;
}
StringBuilder sb = new StringBuilder();
// Column headers
string columnsHeader = ",".TrimStart(',').TrimEnd(',') + ('"');
for (int i = 0; i < dataGridView1.Columns.Count; i++)
{
columnsHeader += dataGridView1.Columns[i].Name +'"' + ',' + '"';
}
sb.Append(columnsHeader + Environment.NewLine);
// Go through each cell in the datagridview
foreach (DataGridViewRow dgvRow in dataGridView1.Rows)
{
// Make sure it's not an empty row.
if (!dgvRow.IsNewRow)
{
for (int c = 0; c < dgvRow.Cells.Count; c++)
{
// Append the cells data followed by a comma to delimit.
sb.Append (dgvRow.Cells[c].Value + ","+ ""+ "".TrimEnd(','));
}
// Add a new line in the text file.
sb.Append(Environment.NewLine);
}
}
// Load up the save file dialog with the default option as saving as a .csv file.
SaveFileDialog sfd = new SaveFileDialog();
sfd.Filter = "CSV files (*.csv)|*.csv";
if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
// If they've selected a save location...
using (System.IO.StreamWriter sw = new System.IO.StreamWriter(sfd.FileName, false))
{
// Write the stringbuilder text to the the file.
sw.WriteLine(sb.ToString());
}
}

I would appreciate all help, Thanks.

-Matti

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