将数据表数据以（XLSX）格式导出到Excel

Question

以下代码目前可以使用，但是我希望它以XLSX格式打开，但在打开Excel后没有任何损坏消息。

protected void BTNExportExcel_Click(object sender, EventArgs e)
{
    DataTable dtexp= ExportTrends(); //const

    try
    {
        Response.Clear();
        Response.ClearContent();             
        Response.ContentType = "application/vnd.ms-excel";
        Response.AddHeader("Content-Disposition", "attachment; filename=Export.xls");
        TextWriter tw = new StringWriter();
        HtmlTextWriter h = new HtmlTextWriter(tw);

        string[] images = TXTImages.Text.Split(new string[]{"<img"},StringSplitOptions.None);

        if (images.Length > 0)
        {   
            Response.Write(images[0].ToString());
            for (int i = 1; i < images.Length; i++)
            {   
                System.Web.UI.WebControls.Image img = new System.Web.UI.WebControls.Image();
                string secondpart = images[i].Substring(images[i].IndexOf(',')+1);
                img.ImageUrl = LoadImage(images[i].Substring(images[i].IndexOf(',') + 1, secondpart.LastIndexOf('\'')));                        
                img.RenderControl(new HtmlTextWriter(Response.Output));
                Response.Write("<BR/><BR/><BR/><BR/><BR/><BR/><BR/><BR/><BR/><BR/><BR/><BR/>");
            }                    
        }
        Response.Write("<BR/>");
        ////// Create a dynamic control, populate and render it
        GridView excel = new GridView();
        excel.DataSource = dtexp;
        excel.DataBind();

        excel.RenderControl(new HtmlTextWriter(Response.Output));

        Response.Flush();
        Response.End();

    }
    catch (Exception ex)
    {
        Response.Write(string.Empty);
        Response.Flush();
        Response.End();
    }
}

Answer 1

确保您设置了对Excel的引用，然后类似下面的代码示例的内容应该可以为您完成工作。

private void button1_Click(object sender, EventArgs e)
        {
            //connect with database
            OleDbConnection connection = new OleDbConnection();
            connection.ConnectionString = @"Provider=""Microsoft.Jet.OLEDB.4.0"";Data Source=""demo.mdb"";User Id=;Password=";
            OleDbCommand command = new OleDbCommand();
            command.CommandText = "select * from parts where Cost<1000 and ListPrice>500";
            DataSet dataSet = new System.Data.DataSet();
            OleDbDataAdapter dataAdapter = new OleDbDataAdapter(command.CommandText, connection);
            dataAdapter.Fill(dataSet);
            DataTable dt = dataSet.Tables[0];
            this.dataGridView1.DataSource = dt;
            //export specific data to Excel
            Workbook book = new Workbook();
            Worksheet sheet = book.Worksheets[0];
            book.Worksheets[0].InsertDataTable(this.dataGridView1.DataSource as DataTable, true, 1, 1);
            book.SaveToFile("sample.xlsx", ExcelVersion.Version2010);
            System.Diagnostics.Process.Start("sample.xlsx");
        }