Question

asp.net 中用FileStream类实现下载文件功能，可不可以不要把保存路径写死，而自行设定路径，像IE下载一样

下面是固定保存路径的代码
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow row = GridView1.SelectedRow;
FtpWebRequest reqFTP;
try
{
FileStream outputStream = new FileStream("F:" + "\\" + row.Cells[1].Text, FileMode.Create);

reqFTP = (FtpWebRequest)FtpWebRequest.Create("ftp://" + this.DropDownList1.SelectedItem.Text + "/" + row.Cells[1].Text);
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential("tool", "tool00");
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
Stream ftpStream = response.GetResponseStream();
long cl = response.ContentLength;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[bufferSize];

readCount = ftpStream.Read(buffer, 0, bufferSize);
while (readCount > 0)
{
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
}

ftpStream.Close();
outputStream.Close();
response.Close();
}
catch (Exception ex)
{
Response.Write("<script language='javascript'>alert('" + ex.Message + "');</script>");
}
}

Answer 1

直接用Response内置对象把文件以流的形式传到前端，浏览器自动就会识别下载了

Answer 2

string path = "你的路径";//这个值可以从毕带悄配置文件读取，或者放个textbox让用户手渣填行雹
FileStream outputStream = new FileStream(path , FileMode.Create);

追问

我想过这种方法，但是这个不够人性化，可不可以调用迅雷或IE弹出下载对话框下载啊