Question

希望你能帮助我。我正在开发一个网页，该网页在aspx中生成一个可以正常工作的GridView，并且单击该按钮时会将gridview导出到excel文件。第二种情况对我不起作用，文件为空。这是代码：

protected void Button2_Click(object sender, EventArgs e) //click en botón Exportar- -Click to export
{
   try
    {
        Response.Clear();
        Response.Buffer = true;
        Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "CUSS - Global Stats.xls"));
        Response.ContentType = "application/ms-excel";
        Response.ContentEncoding = System.Text.Encoding.Unicode;  
        System.IO.StringWriter writer = new StringWriter();
        System.Web.UI.HtmlTextWriter html = new System.Web.UI.HtmlTextWriter(writer);
        GridView1.AllowPaging = false;
        GridView1.RenderControl(html); //gpp prints outs
        Response.Write(writer.ToString());
        Response.Flush();
        Response.End();
    }
    catch (Exception)
    {
    }

Gridview可以在asp中正确生成，如图所示。GridViewResult

 protected void Button1_Click(object sender, EventArgs e)
    {

            ...
            GridView1.DataSource = Prints.ToList();
            GridView1.DataBind();
            ...

    }

您能帮我吗？

Answer 1

应该有一种更好的方法，但是我再次“制作”了GridView： using ClosedXML.Excel; 点击事件：

public void button1_Click(object sender, EventArgs e)
{
    using(XLWorkbook libro_trabajo = new XLWorkbook())
    {
        DataSet ps = datos_referencias();

        libro_trabajo.Worksheets.Add(ps);
        libro_trabajo.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
        libro_trabajo.Style.Font.Bold = true;
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "";
        Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        Response.AddHeader("content-disposition", "attachment;filename=reporte_clientes.xlsx");

        using (MemoryStream memoria = new MemoryStream())
        {

            libro_trabajo.SaveAs(memoria);
            memoria.WriteTo(Response.OutputStream);
            Response.Flush();
            Response.End();

        }
    }
}

获取我的数据集：

public DataSet datos_referencias()
{

    DataSet ds = new DataSet();
    DataTable tabla_detallado = new DataTable("Clientes");
    tabla_detallado.Columns.Add(new DataColumn("Cliente", typeof(string)));
    objeto = new Conexion();
    try
    {
        objeto.abrir_conexion_mysql();
        objeto.cadena_comando_mysql = "SELECT * from ...ETC ";
        objeto.aplicar_comando_mysql_extraccion();
        while (objeto.leer_comando.Read())
        {
            DataRow fila = tabla_detallado.NewRow();
            fila["Cliente"] = (objeto.leer_comando.GetString(1)).ToUpper();                
            tabla_detallado.Rows.Add(fila);
        }

    }
    finally {objeto.cerrar_conexion_mysql_extraccion(); }
    ds.Tables.Add(tabla_detallado);
    return ds;
}

Answer 2

也许是因为做出了回应GZip？

在过滤器上？

response.Filter = New GZipStream(response.Filter, CompressionMode.Compress)

导出到Gridview时为空的Excel文件

2 个答案: