Public Function ExportExcel()Function ExportExcel(ByVal dgv As DataGridView, ByVal IsOnlyVisible As Boolean) As Boolean
    Try
      Dim n, i, j, row, col As Integer
      Dim excel As Excel.Application = New Excel.Application()


      excel.Application.Workbooks.Add(True)
      col = 1
      '//记录列名
      For n = 0 To dgv.ColumnCount - 1
        If IsOnlyVisible Then
          If dgv.Columns(n).Visible Then
            excel.Cells(1, col) = dgv.Columns(n).HeaderText
            col = col + 1
          End If
        Else
          excel.Cells(1, n + 1) = dgv.Columns(n).HeaderText
        End If

      Next
      '//记录内容
      row = 2
      ' col = 1

      For i = 0 To dgv.RowCount - 1
        col = 1
        For j = 0 To dgv.ColumnCount - 1
          'System.Windows.Forms.Application.DoEvents()
          If IsOnlyVisible Then
            If dgv.Columns(j).Visible Then
              excel.Cells(i + 2, col) = dgv.Rows(i).Cells(j).Value
              col = col + 1
            End If
          Else
            excel.Cells(i + 2, j + 1) = dgv.Rows(i).Cells(j).Value
          End If
        Next

      Next
      excel.Visible = True
    Catch ex As Exception
      Throw ex
    End Try
  End Function
2个参数分别是datagridview的ID与是否导出隐藏列

定义function那里粘贴的时候没弄好，拷贝的时候主义下，把多的Function ExportExcel()删掉