exportação de dados de um datagridview para excel

Paulo,

Dá uma olhadinha neste codigo abaixo, vê se te ajuda.

private void button1_Click(object sender, EventArgs e)
{


Excel.Application xlApp;
Excel.Workbook xlWorkBook;
Excel.Worksheet xlWorkSheet;
object misValue = System.Reflection.Missing.Value;

xlApp = new Excel.ApplicationClass();
xlWorkBook = xlApp.Workbooks.Add(misValue);
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
int i = 0;
int j = 0;

for (i = 0; i <= dgvBusca.RowCount - 1; i++)
{
for (j = 0; j <= dgvBusca.ColumnCount - 1; j++)
{
DataGridViewCell cell = dgvBusca[j, i];
xlWorkSheet.Cells[i + 1, j + 1] = cell.Value;
}
}

xlWorkBook.SaveAs(Teste1.xls, Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
xlWorkBook.Close(true, misValue, misValue);
xlApp.Quit();



releaseObject(xlWorkSheet);
releaseObject(xlWorkBook);
releaseObject(xlApp);

MessageBox.Show(Excel criado com sucesso!);
}

private void releaseObject(object obj)
{
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
obj = null;
}
catch (Exception ex)
{
obj = null;
MessageBox.Show(ocorreu um erro: + ex.ToString());
}
finally
{
GC.Collect();
}

}