Question

我有一个小的导入例程，它从ftp源获取数据，解析它们并使用lint-to-sql将数据写入数据库。除了部分之外，这一切都完美无缺，即正在下载的文件不会在本地保存。

该程序遵循以下步骤：

列出来源
遍历所有文件
如果文件存在，请跳过
如果文件尚不存在则下载并解析
解析内容
保存到db
保存到文件（不工作）

文件在适当的文件夹中创建，但大小为0字节。我哪里出错了？

代码：

FtpWebResponse responseFileDownload = (FtpWebResponse)requestFileDownload.GetResponse();
try
{
    using (Stream responseStream = responseFileDownload.GetResponseStream())
    {
         using (FileStream writeStream = new FileStream(localPath + "\\downloads\\" + FtpListing[i], FileMode.Create))
         {
         //data which is not downloaded, already exists as a flatfile locally
         //write data from responsestream to db
             using (var reader = new StreamReader(responseStream))
             {
                 //ignore first line
                 string headline = reader.ReadLine();
                 #region Linq-To-Sql logic | Parsing
                 List<Messwert> fooList = new List<Messwert>();
                 //read rest of csv
                 using (var context = new DataContext())
                 {
                   //Logic edited out
                   //context.SubmitChanges();
                 }
             }
             #endregion
             responseStream.Position = 0;
             responseStream.CopyTo(writeStream);
         }
     }
 }

提前谢谢

Answer 1

可能同样的问题：How can I read an Http response stream twice in C#? 您正尝试两次读取响应流。

来自流的数据不会写入文件

1 个答案: