使用asp.net从web方法将数据集导出为ex​​cel时出现问题

Question

我正在尝试使用以下代码将数据集从asp.net页面方法（webmethod）导出到excel。

[WebMethod]
    public static void ExporttoExcel()
    {
        DataSet ds;
       productfactory pf=new productfactory();
        ds = pf.getproducts();
        HttpResponse response = HttpContext.Current.Response;

        // first let's clean up the response.object
        response.Clear();
        response.Charset = "";
        response.ContentEncoding = System.Text.Encoding.Default;

        // set the response mime type for excel
        response.ContentType = "application/vnd.ms-excel";
        response.AddHeader("Content-Disposition", "attachment;filename=\"products.xls\"");

        // create a string writer
        using (StringWriter sw = new StringWriter())
        {
            using (HtmlTextWriter htw = new HtmlTextWriter(sw))
            {
                // instantiate a datagrid
                DataGrid dg = new DataGrid();                    
                dg.DataSource = ds.Tables[0];
                dg.DataBind();
                dg.RenderControl(htw);
                string filepath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\\products.xls";                    
                response.Write(sw.ToString());
               // response.End();

            }
        }       
    }

上面的代码似乎工作正常，除了下载文件对话框没有打开以询问用户是否“保存”/“打开”对话框，因此我没有看到响应被写入文件。相反，当我在Firebug中检查响应时，我将以HTML表格结构获取数据。

有人可以帮我吗？

感谢。

Answer 1

如果您可以将产品数据导入DataTable，请尝试以下方法：

protected void ExportToExcel(DataTable myTable, string name)
    {
        //Set Response
        Response.Clear();
        Response.AddHeader("content-disposition", "attachment; filename="+name+".xls");
        Response.Charset = "";
        Response.ContentType = "application/vnd.ms-excel";

        //Print columns headers
        //manually create column headers
        Response.Write("Column1" + "\t");
        Response.Write("Column2" + "\t");
        Response.Write("\n");

        foreach (DataRow row in myTable.Rows) // Loop over the rows.
        {
            Response.Write(row["column1_database_name"].ToString() + "\t");
            Response.Write(row["column2_database_name"].ToString() + "\t");
            Response.Write("\n");
        }

        //End Response
        Response.End();
    }