Err_Response_Headers_Multiple_Content_Disposition

Question

我需要单击一次按钮导出 2 个csv文件。下面是我生成 2 个csv文件的代码：

using System.Data;
using System.Data.SqlClient;
using System.Text;
using System.IO;
using System;
using System.Configuration;
using System.IO.Packaging;
using System.Web;

namespace ExportToCsv
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        //Build the CSV file data as a Comma separated string.
        string csvHeader = string.Empty;
        //Build the CSV file data as a Comma separated string.
        string csvDetails = string.Empty;    

        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void ExportCSV(object sender, EventArgs e)
        {
            string constr = ConfigurationManager.ConnectionStrings["ConStr"].ConnectionString;
            using (SqlConnection con = new SqlConnection(constr))
            {
                using (SqlCommand cmd = new SqlCommand("select * from mytable-1")
                {
                    using (SqlDataAdapter sda = new SqlDataAdapter())
                    {
                        cmd.Connection = con;
                        sda.SelectCommand = cmd;
                        using (DataTable dt = new DataTable())
                        {
                            sda.Fill(dt);


                            //foreach (DataRow rows in dt.Rows)
                            //{
                                foreach (DataColumn column in dt.Columns)
                                {
                                    //Add the Header row for CSV file.
                                    csvHeader += column.ColumnName + ' ';
                                }


                                //Add new line.
                                csvHeader += "\r\n";

                                foreach (DataRow row in dt.Rows)
                                {
                                    foreach (DataColumn column in dt.Columns)
                                    {
                                        //Add the Data rows.
                                        csvHeader += row[column.ColumnName].ToString().Replace(",", ";") + ' ';
                                    }

                                    //Add new line.
                                    csvHeader += "\r\n";
                                }
                            //}

                                Response.Clear();
                                Response.Buffer = true;
                                Response.AddHeader("content-disposition", "attachment;filename=HeaderSection.txt");
                                Response.Charset = "";
                                Response.ContentType = "application/text";
                                Response.Output.Write(csvHeader);                                                    
                        }
                    }              
                }

                using (SqlCommand cmd = new SqlCommand("select * from mytable-2")
                {
                    using (SqlDataAdapter sda = new SqlDataAdapter())
                    {
                        cmd.Connection = con;
                        sda.SelectCommand = cmd;
                        using (DataTable dt = new DataTable())
                        {
                            sda.Fill(dt);


                            //foreach (DataRow rows in dt.Rows)
                            //{
                            foreach (DataColumn column in dt.Columns)
                            {
                                //Add the Header row for CSV file.
                                csvDetails += column.ColumnName + ' ';
                            }


                            //Add new line.
                            csvDetails += "\r\n";

                            foreach (DataRow row in dt.Rows)
                            {
                                foreach (DataColumn column in dt.Columns)
                                {
                                    //Add the Data rows.
                                    csvDetails += row[column.ColumnName].ToString().Replace(",", ";") + ' ';
                                }

                                //Add new line.
                                csvDetails += "\r\n";
                            }
                            //}

                            // Download the CSV file.
                            Response.Clear();
                            Response.Buffer = true;
                            Response.AddHeader("content-disposition", "attachment;filename=DetailSection.txt");
                            Response.Charset = "";
                            Response.ContentType = "application/text";
                            Response.Output.Write(csvDetails);
                            Response.Flush();
                            Response.End();
                        }
                    }
                }
            }

        }       
    }
}

我从 2 个不同的表中获取数据并分别导出 csv 中的数据。如果我删除第二个using语句，这些函数可以正常工作，但是当我添加第二个using语句来编写第二个 csv 时，我的浏览器（Chrome）会出现错误Err_Response_Headers_Multiple_Content_Disposition

请帮忙。提前致谢。

Answer 1

我用这篇文章解决了

上周这个错误一直困扰着我。此错误特定于 Google Chrome。虽然不是 chrome 本身的错误，因为其他浏览器会忽略重复的标题，这似乎是 Chrome 的问题。如果您或您的 Web 应用程序正在发送标头，则可以通过以下方式轻松解决此问题。

1 - 使用 "" 将文件名括起来。IE

header('Content-Disposition: attachment; filename="'.$file_name.'"');

代替

header('Content-Disposition: 附件;文件名='.$file_name);

2 - 如果可能，用下划线 (_) 替换空格和逗号 (,)

$file_name = str_replace(array('"', "'", ' ', ','), '_', $file_name);

3 - 通过将可选的替换参数设置为 true，明确告诉 PHP 覆盖标头。

header('Content-type: application/pdf', true);

修复重复标题错误 349

Answer 2

您不能这样做，因为 HTTP 不支持它。您可以做的是将两个文件捆绑成一个文件（例如 ZIP 文件）并将其发送给客户端。