转换为Excel时缺少列标题

Question

将datagridview数据转换为excel后，我缺少列标题。在不同的指南中尝试了一些代码，但仍然没有得到标题，我缺少任何东西吗？

private void convert_Click(object sender, EventArgs e)
    {


        Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
        Microsoft.Office.Interop.Excel.Workbook workbook = app.Workbooks.Add(Type.Missing);
        Microsoft.Office.Interop.Excel.Worksheet worksheet = null;
        worksheet = workbook.Sheets["Sheet1"];
        worksheet = workbook.ActiveSheet;
        worksheet.Name = "Unmatched";
        for (int i = 1; i < dataGridView2.Columns.Count + 1; i++)
        {
            if (dataGridView2.Columns[i - 1].Visible)
            {
                worksheet.Cells[i, 1] = dataGridView2.Columns[i - 1].HeaderText;
            }
        }
        for (int i = 0; i < dataGridView2.Rows.Count; i++)
        {
            for (int j = 0; j < dataGridView2.Columns.Count; j++)
            {
                if (dataGridView2.Rows[i].Cells[j].Value != null)
                {
                    worksheet.Cells[i + 2, j + 1] = dataGridView2.Rows[i].Cells[j].Value.ToString();
                }
            }
        }
        var saveFileDialog = new SaveFileDialog();
        saveFileDialog.FileName = "report";
        saveFileDialog.DefaultExt = ".xlsx";
        if (saveFileDialog.ShowDialog() == DialogResult.OK)
        {
            workbook.SaveAs(saveFileDialog.FileName, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
        } 
        app.Quit();
    }

what excel have

What it should have and what is in datagridview

Answer 1

worksheet.Cells[i] = dataGridView2.Columns[i - 1].HeaderText;