C# 保存对话框下载文件，将文件从 ASP.NET 服务器保存到客户端
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Save dialog box to download file, Saving file from ASP.NET server to the client
提问by user1734609
I've been searching around the internet, but couldn't find any useful answer.
我一直在互联网上搜索，但找不到任何有用的答案。
I have an ASP.NET web site, which is deployed on server. The ASP.NET web site on the server can access a directory called W:/ . The clients in the company can access the web site. The web site lists in a ListBox all the PDF files from the W:/ directory. The client should be able to select PDF files from the listbox and save them to it's local PC by selecting a location for it.
我有一个 ASP.NET 网站，它部署在服务器上。服务器上的 ASP.NET 网站可以访问名为 W:/ 的目录。公司内的客户可以访问该网站。该网站在一个列表框中列出了 W:/ 目录中的所有 PDF 文件。客户端应该能够从列表框中选择 PDF 文件，并通过为其选择位置将它们保存到本地 PC。
Something like save as file on web pages.
类似于在网页上另存为文件。
Could you provide me some solution or work around ?
你能给我提供一些解决方案或解决办法吗？
回答by Aristos
The correct keywords are "File Browser asp.net" to find a lot of examples with source code.
正确的关键字是“File Browser asp.net”，可以找到很多带有源代码的示例。
Here is one from codeproject:
这是 codeproject 中的一个：
http://www.codeproject.com/Articles/301328/ASP-NETUser-Control-File-Browser
http://www.codeproject.com/Articles/301328/ASP-NETUser-Control-File-Browser
回答by Aristos
Get file contents in byte[] from W drive and write it to local file.
从 W 驱动器获取 byte[] 中的文件内容并将其写入本地文件。
byte[] data = File.ReadAllBytes(WDriveFilePath)
FileStream file = File.Create(HttpContext.Current.Server.MapPath(MyLocalFile));
file.Write(data, 0, data.Length);
file.Close();
回答by user1734609
Finally I've found an article, which Prompts a Save Dialog Box to Download a File from ASP.NET
最后我找到了一篇文章，它提示保存对话框从 ASP.NET 下载文件
I post it here, might help somebody else as well and save some time.
我把它贴在这里，也可以帮助其他人并节省一些时间。
String FileName = "FileName.txt";
String FilePath = "C:/...."; //Replace this
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.ClearContent();
response.Clear();
response.ContentType = "text/plain";
response.AddHeader("Content-Disposition", "attachment; filename=" + FileName + ";");
response.TransmitFile(FilePath);
response.Flush();
response.End();
回答by Jithesh Chandra
I have done something like this to get the file .
我已经做了这样的事情来获取文件。
protected void btnExportFile_Click(object sender, EventArgs e)
{
try
{
Thread newThread = new Thread(new ThreadStart(ThreadMethod));
newThread.SetApartmentState(ApartmentState.STA);
newThread.Start();
// try using threads as you will get a Current thread must be set to single thread apartment (STA) mode before OLE Exception .
}
catch (Exception ex)
{
}
}
static void ThreadMethod()
{
Stream myStream;
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.RestoreDirectory = true;
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
if ((myStream = saveFileDialog1.OpenFile()) != null)
{
// Code to write the stream goes here.
myStream.Close();
}
}
}
回答by Mehdi Benkirane
This is an extension to user1734609's solution that gets a file locally.
这是 user1734609 在本地获取文件的解决方案的扩展。
To download a file from the server to client:
要将文件从服务器下载到客户端：
public void DownloadFile()
{
String FileName = "201604112318571964-sample2.txt";
String FilePath = AppDomain.CurrentDomain.BaseDirectory + "/App_Data/Uploads/" + FileName;
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.ClearContent();
response.Clear();
response.ContentType = "text/plain";
response.AddHeader("Content-Disposition", "attachment; filename=" + FileName + ";");
response.TransmitFile(FilePath);
response.Flush();
response.End();
}
